# Sierra Circuits

> Sierra Circuits

---


## Pages

- [Purchase Agreement](https://www.protoexpress.com/purchase-agreement/)
- [Steminist](https://www.protoexpress.com/steminist/)
- [Design Modification Support](https://www.protoexpress.com/design-modification-service/)
- [Concept To Prototype](https://www.protoexpress.com/concept-to-prototype/)
- [PCB Design Support](https://www.protoexpress.com/pcb-design-support/)
- [Footprint Design Support](https://www.protoexpress.com/footprint-design-service/)
- [BOM Building Support](https://www.protoexpress.com/bom-building-service/)
- [Download the KiCad Quote Plugin](https://www.protoexpress.com/kicad-quote-plugin-download/)
- [KiCad Quote Plugin](https://www.protoexpress.com/kicad-quote-plugin/)
- [Events](https://www.protoexpress.com/events/)
- [Facility Tour](https://www.protoexpress.com/facility-tour/)
- [PCB Stack-Up Design Support](https://www.protoexpress.com/pcb-stack-up-design/)
- [PCB Reverse Engineering Support](https://www.protoexpress.com/pcb-reverse-engineering/)
- [PCB Schematic Design Support](https://www.protoexpress.com/pcb-schematic-design/)
- [PCB Design Support for Signal Integrity](https://www.protoexpress.com/pcb-design-for-signal-integrity/)
- [PCB Cost Optimization Support](https://www.protoexpress.com/pcb-cost-optimization/)
- [PCB Layout Design Support](https://www.protoexpress.com/pcb-layout/)
- [Book a Tour of our PCB Manufacturing House in the USA](https://www.protoexpress.com/pcb-manufacturing-usa/)
- [CCPA Compliance](https://www.protoexpress.com/ccpa-compliance/)
- [Blog](https://www.protoexpress.com/blog/)
- [Privacy Policy](https://www.protoexpress.com/privacy/)
- [Webinars](https://www.protoexpress.com/webinar/)
- [PCB Tools](https://www.protoexpress.com/tools/)
- [Products](https://www.protoexpress.com/products/)
- [Knowledge Base](https://www.protoexpress.com/kb/)
- [FAQ](https://www.protoexpress.com/faq/)
- [Design Guides](https://www.protoexpress.com/pcb-design-guides/)
- [About Sierra Circuits](https://www.protoexpress.com/about-sierra-circuits/)
- [PCB Certifications](https://www.protoexpress.com/pcb-certificates/)
- [Sierra Circuits PCB Fabrication & Assembly Capabilities](https://www.protoexpress.com/pcb-manufacturing-capabilities/)
- [Join Our Team](https://www.protoexpress.com/careers/)
- [Terms & Conditions](https://www.protoexpress.com/terms-and-conditions/)
- [Delivering Innovative PCB Solutions](https://www.protoexpress.com/industries/)
- [Home](https://www.protoexpress.com/)

---


## Posts

- [Why Choose Halogen-Free PCBs for Sustainable Electronics](https://www.protoexpress.com/blog/why-choose-halogen-free-pcbs-for-sustainable-electronics/)
- [Decoupling Capacitor Placement Guidelines Every PCB Designer Should Know](https://www.protoexpress.com/blog/decoupling-capacitor-placement-guidelines-pcb-design/)
- [How Flying Probe Testing Works for PCB Assembly](https://www.protoexpress.com/blog/how-flying-probe-testing-works-for-pcb-assembly/)
- [Key Aspects of DFM for HDI PCBs](https://www.protoexpress.com/blog/key-aspects-dfm-hdi-pcbs/)
- [How to Choose PCB Laminates Based on IPC Standards](https://www.protoexpress.com/blog/how-to-choose-pcb-laminates-based-on-ipc-standards/)
- [Designing and Fabricating Ultra-HDI PCBs](https://www.protoexpress.com/blog/designing-fabricating-uhdi-pcbs/)
- [What is ITAR, the International Traffic in Arms Regulations?](https://www.protoexpress.com/blog/zoom-on-itar-the-international-traffic-arms-regulations/)
- [PCB Stack-up: Plan, Design, Manufacture and Repeat](https://www.protoexpress.com/blog/pcb-stack-up-plan-design-manufacture-repeat/)
- [5 DFM Issues Designers Should Check Before PCB Manufacturing](https://www.protoexpress.com/blog/dfm-issues-pcb-manufacturing/)
- [How to Choose the Right PCBs for IC Integration](https://www.protoexpress.com/blog/how-to-choose-right-pcbs-for-ic-integration/)
- [IPC Class 2 VS Class 3: The Different Design Rules](https://www.protoexpress.com/blog/ipc-class-2-vs-class-3-different-design-rules/)
- [Why Controlled Impedance Really Matters](https://www.protoexpress.com/blog/controlled-impedance-really-matters/)
- [A Complete Guide to PCB Interfaces and Communication Protocols](https://www.protoexpress.com/blog/complete-guide-pcb-interfaces-communication-protocols/)
- [Designing Transmission Lines with Controlled Impedance in High-Speed PCB Layouts](https://www.protoexpress.com/blog/designing-transmission-lines-with-controlled-impedance-high-speed-pcb-layouts/)
- [How Designers Benefit from PCB Component Management Services](https://www.protoexpress.com/blog/how-designers-benefit-from-pcb-component-management-services/)
- [Analyzing Eye Diagrams for Signal Integrity in High-Speed PCBs](https://www.protoexpress.com/blog/analyzing-eye-diagrams-for-signal-integrity-high-speed-pcbs/)
- [IPC Standards and Guidelines for Testing Flex PCBs](https://www.protoexpress.com/blog/ipc-guidelines-and-testing-for-flex-pcbs/)
- [Advanced PCB Assembly and Key Components for Humanoid Robotics](https://www.protoexpress.com/blog/advanced-pcb-assembly-humanoid-robotics/)
- [Humanoid Robotics PCB Design and Advanced Manufacturing Techniques](https://www.protoexpress.com/blog/humanoid-robotics-pcb-design-and-advanced-manufacturing-techniques/)
- [How to Get Your First PCB Manufactured](https://www.protoexpress.com/blog/how-to-get-your-first-pcb-manufactured/)
- [Techniques to Measure and Avoid Jitter in PCBs](https://www.protoexpress.com/blog/techniques-to-measure-and-avoid-jitter-in-pcbs/)
- [Designing High-Temperature Flex PCBs: 6 Challenges with Solutions](https://www.protoexpress.com/blog/designing-high-temperature-flex-pcbs-challenges-with-solutions/)
- [How to Design a PCB with Embedded Components](https://www.protoexpress.com/blog/how-to-design-pcb-with-embedded-components/)
- [Building a PCB Prototype from Scratch: A Designer's Guide](https://www.protoexpress.com/blog/building-pcb-prototype-from-scratch-designers-guide/)
- [How to Design an ESD Protection Circuit for Your PCBs](https://www.protoexpress.com/blog/how-to-design-effective-esd-protection-circuit-for-pcbs/)
- [What is Thermal Profiling in PCB Assembly?](https://www.protoexpress.com/blog/thermal-profiling-pcb-assembly-unsung-hero/)
- [7 PCB Layout Design Tips for Power Electronics](https://www.protoexpress.com/blog/pcb-layout-design-tips-for-power-electronics/)
- [How to Select Components and Materials for Power Electronics PCBs](https://www.protoexpress.com/blog/how-to-select-components-and-materials-for-power-electronics-pcbs/)
- [How to Become a PCB Designer in 2025](https://www.protoexpress.com/blog/how-to-become-a-pcb-designer/)
- [Annular Ring Explained by a PCB Manufacturer](https://www.protoexpress.com/blog/dont-let-annular-rings-drive-you-crazy/)
- [5 Typical PCB Design Challenges With Solutions for Engineers](https://www.protoexpress.com/blog/pcb-design-challenges-with-solutions-for-engineers/)
- [How to Design a Mixed-Signal PCB with Signal Integrity](https://www.protoexpress.com/blog/how-to-design-mixed-signal-pcb-with-signal-integrity/)
- [4 RF PCB Via Design Challenges with Layout Solutions](https://www.protoexpress.com/blog/rf-pcb-via-design-challenges-with-layout-solutions/)
- [How to Autoroute a PCB Layout in KiCad using FreeRouting Plugin](https://www.protoexpress.com/blog/how-to-autoroute-pcb-layout-in-kicad-using-freerouting-plugin/)
- [10 Layout Tips for High-Speed and High-Current PCB Traces](https://www.protoexpress.com/blog/best-layout-tips-for-high-speed-and-high-current-pcb-traces/)
- [Microwave PCB Design Challenges and How to Overcome Them](https://www.protoexpress.com/blog/microwave-pcb-design-challenges-and-how-to-overcome-them/)
- [Microwave PCB Material Selection and CPW for Signal Integrity](https://www.protoexpress.com/blog/microwave-pcb-material-selection-and-cpw-for-signal-integrity/)
- [How to Place Components in KiCad](https://www.protoexpress.com/blog/how-to-place-components-kicad/)
- [How to Create a Schematic for High-Speed Designs in KiCad](https://www.protoexpress.com/blog/how-to-create-schematic-high-speed-design-kicad/)
- [How to Draw and Design a PCB Schematic?](https://www.protoexpress.com/blog/how-to-draw-design-pcb-schematic/)
- [KiCad Version 9: Exploring the New Features](https://www.protoexpress.com/blog/kicad-version-9-exploring-the-new-features/)
- [How to Route Differential Pairs in KiCad](https://www.protoexpress.com/blog/how-to-route-differential-pairs-in-kicad/)
- [PCB Component Footprint Creation in KiCad, Altium Designer, and Allegro](https://www.protoexpress.com/blog/pcb-footprint-creation-allegro-altium-designer-kicad/)
- [How to Export Production Files in KiCad: IPC-2581 and Gerber](https://www.protoexpress.com/blog/how-to-export-gerber-and-production-files-in-kicad/)
- [How to Route a PCB in KiCad](https://www.protoexpress.com/blog/how-to-route-a-pcb-in-kicad/)
- [How to Create a Schematic and Symbol Library in KiCad](https://www.protoexpress.com/blog/how-to-create-a-schematic-and-symbol-library-kicad/)
- [Try the KiCad Plugin for an Instant PCB Quote](https://www.protoexpress.com/blog/kicad-pcb-plugin-instant-quote/)
- [How to Run a Design Rule Check (DRC) for Your PCBs](https://www.protoexpress.com/blog/drc-pcb-manufacturing/)
- [How to Set Up Design Rules in KiCad](https://www.protoexpress.com/blog/how-to-set-up-design-rules-kicad/)
- [9 Factors that Impact RF PCB Designs and Tips to Resolve Them](https://www.protoexpress.com/blog/factors-impact-rf-pcb-design/)
- [How Modular PCB Design Method Simplifies Complex Layouts](https://www.protoexpress.com/blog/how-modular-pcb-design-method-simplifies-complex-layouts/)
- [How to Pick RF PCB Materials: 7 Important Factors to Consider](https://www.protoexpress.com/blog/how-to-pick-rf-pcb-materials-important-factors-to-consider/)
- [Case Study: Reverse Engineering a Flex PCB to Generate Design Files](https://www.protoexpress.com/blog/case-study-reverse-engineering-flex-pcb-to-generate-design-files/)
- [Antenna Integration and RF Design Guidelines for 5G PCBs](https://www.protoexpress.com/blog/antenna-integration-rf-design-guidelines-for-5g-pcbs/)
- [How to Reduce Your PCB Assembly Cost](https://www.protoexpress.com/blog/how-to-reduce-pcb-assembly-cost/)
- [Case Study: Designing Loose-Leaf Rigid-Flex PCB Stack-up for Enhanced Flexibility](https://www.protoexpress.com/blog/case-study-implementing-loose-leaf-rigid-flex-pcb-stackup-for-enhanced-flexibility/)
- [Flex PCB Design Guidelines Part 2: Optimizing Layout for Manufacturing](https://www.protoexpress.com/blog/flex-pcb-design-guidelines-for-manufacturing/)
- [5 PCB Trace Termination Techniques to Reduce Signal Reflections](https://www.protoexpress.com/blog/pcb-trace-termination-techniques-to-reduce-signal-reflections/)
- [Flex PCB Design Guidelines Part 1: Pre-Layout Considerations](https://www.protoexpress.com/blog/flex-pcb-design-guidelines/)
- [How to Choose the Right HDI PCB Materials](https://www.protoexpress.com/blog/choosing-hdi-materials/)
- [Case Study: Resolving EMI and PCB Routing Issues in a Medical Optical Scanner](https://www.protoexpress.com/blog/case-study-resolving-emi-and-routing-issues-in-medical-optical-scanner/)
- [4 Common PDN Design Challenges and How to Resolve Them](https://www.protoexpress.com/blog/common-pdn-design-challenges-and-how-to-resolve/)
- [Via Filling Techniques Designers Need to Know for PCB Fabrication](https://www.protoexpress.com/blog/via-filling-techniques-designers-need-to-know-for-pcb-fabrication/)
- [13 Most Used PCB Layout Design Tools](https://www.protoexpress.com/blog/10-best-pcb-layout-design-tools-recommended-by-pcb-designers/)
- [How to Design a PCB for 5G Wireless Applications](https://www.protoexpress.com/blog/how-to-design-pcbs-for-5g-wireless-applications/)
- [The Importance of PCB Line Spacing, Creepage, and Clearance](https://www.protoexpress.com/blog/importance-pcb-line-spacing-creepage-clearance/)
- [Case Study: Designing Microcontroller and Functional PCBs with an Antenna](https://www.protoexpress.com/blog/case-study-designing-microcontroller-and-functional-pcbs-with-antenna/)
- [S-parameters Measurement Using a Vector Network Analyzer](https://www.protoexpress.com/blog/s-parameters-measurement-vector-network-analyzer/)
- [Top 5 HDI PCB Routing Challenges and Ways to Mitigate Them](https://www.protoexpress.com/blog/hdi-pcb-routing-challenges/)
- [Solder Mask Layer in PCBs: Top 4 DFM Guidelines](https://www.protoexpress.com/blog/what-is-solder-mask-layer/)
- [How to Determine the Impedance of a Circuit](https://www.protoexpress.com/blog/how-to-determine-impedance-circuit/)
- [How to Reduce Ringing in Your PCB Designs](https://www.protoexpress.com/blog/how-to-reduce-ringing-in-pcb-designs/)
- [How to Design Reliable Microvias in Your PCBs](https://www.protoexpress.com/blog/how-to-design-reliable-microvias-in-your-pcbs/)
- [IoT PCBs: Design Challenges and Emerging Trends by Ethan Pierce](https://www.protoexpress.com/blog/iot-pcbs-design-challenges-emerging-trends-ethan-pierce/)
- [How to Optimize Your PCB Designs for Testing by Harry Kennedy](https://www.protoexpress.com/blog/how-to-optimize-your-pcb-designs-for-testing-by-harry-kennedy/)
- [How to Handle Crosstalk in High-Speed PCB Designs](https://www.protoexpress.com/blog/crosstalk-high-speed-pcb-design/)
- [The Future of PCB Etching by Laurent Nicolet](https://www.protoexpress.com/blog/future-of-pcb-etching-laurent-nicolet/)
- [High-Speed and HDI PCB Design Strategies by Syed Ubaid Ali Warsi](https://www.protoexpress.com/blog/high-speed-hdi-pcb-design-strategies/)
- [Aerospace PCB Design Challenges by Christopher Young](https://www.protoexpress.com/blog/aerospace-pcb-design-challenges-christopher-young/)
- [PCB Heat Dissipation Techniques by Keven Coates](https://www.protoexpress.com/blog/pcb-heat-dissipation-techniques-keven-coates/)
- [10 HDI PCB Design Tips to Maintain Signal Integrity](https://www.protoexpress.com/blog/hdi-pcb-design-tips-for-signal-integrity/)
- [What is Signal Propagation Delay in PCBs?](https://www.protoexpress.com/blog/signal-propagation-delay-pcb/)
- [13 Common DFM Mistakes in Rigid-Flex PCBs and Techniques to Avoid Them](https://www.protoexpress.com/blog/rigid-flex-webinar-altium/)
- [PCB Design for Assembly Checklist: 9 Important Checks for Layout Engineers](https://www.protoexpress.com/blog/pcb-design-for-assembly-checklist-important-checks-for-layout-engineers/)
- [Soldering Seminar by Jim Smith in Sunnyvale, CA in November](https://www.protoexpress.com/blog/what-you-will-learn-at-the-science-of-soldering-class/)
- [6 Design Mistakes That Lead to PCB Assembly Errors](https://www.protoexpress.com/blog/design-mistakes-that-lead-to-pcb-assembly-errors/)
- [6 Common Solder Mask Errors Every PCB Designer Should Know](https://www.protoexpress.com/blog/6-common-solder-mask-errors-every-pcb-designer-should-know/)
- [Case Study: Routing Microcontroller and BGA in Rigid-Flex PCBs](https://www.protoexpress.com/blog/case-study-routing-microcontroller-and-bga-in-rigid-flex-pcbs/)
- [Advantages of Ordering PCB Prototype and Bulk Production from a Single Fab House](https://www.protoexpress.com/blog/advantages-of-ordering-pcb-prototype-and-bulk-production-from-single-fab-house/)
- [How to Design and Build a Hybrid PCB Stack-Up](https://www.protoexpress.com/blog/how-to-design-and-build-a-hybrid-pcb-stackup/)
- [Case Study: Eliminating BOM and Footprint Errors in PCB Assembly](https://www.protoexpress.com/blog/case-study-eliminating-bom-and-footprint-errors-in-pcb-assembly/)
- [Case Study: Designing a High-Current PCB with Voltage Doublers](https://www.protoexpress.com/blog/case-study-designing-high-current-pcb-with-voltage-doublers/)
- [14 Aviation and Aerospace PCB Design Rules for High Reliability](https://www.protoexpress.com/blog/aviation-aerospace-pcbs-is-sky-the-limit-for-pcb-manufacturers/)
- [How Via Impedance Impacts Signal Integrity in PCBs](https://www.protoexpress.com/blog/how-via-impedance-impacts-signal-integrity-in-pcbs/)
- [Best PCB Grounding Techniques for High-Power and HDI Designs](https://www.protoexpress.com/blog/best-pcb-grounding-techniques-for-high-power-and-hdi-designs/)
- [Aerospace PCB Design Tips for Efficient Thermal Management](https://www.protoexpress.com/blog/aerospace-pcb-design-tips-for-efficient-thermal-management/)
- [How Via Stitching Facilitates High-Current PCB Designs](https://www.protoexpress.com/blog/how-via-stitching-facilitates-high-current-pcb-designs/)
- [Case Study: Designing 8 and 14-Layer HDI PCBs with Stacked Vias](https://www.protoexpress.com/blog/case-study-designing-8-and-14-layer-hdi-pcbs-with-stacked-vias/)
- [How Sequential Lamination is Performed to Manufacture HDI PCBs](https://www.protoexpress.com/blog/how-sequential-lamination-is-performed-to-manufacture-hdi-pcbs/)
- [Case Study: Designing an HDI Board with 0.4 and 0.65 mm BGAs](https://www.protoexpress.com/blog/case-study-designing-hdi-board-with-4-and-65-mm-bgas/)
- [How to Optimize Your PCB Trace Using IPC-2152 Standard](https://www.protoexpress.com/blog/how-to-optimize-your-pcb-trace-using-ipc-2152-standard/)

---


## Industry

- [Telecom PCBs](https://www.protoexpress.com/industries/telecom-pcbs/)
- [PCB Solutions for Universities and Research Institutions](https://www.protoexpress.com/industries/university-research-pcb/)
- [Aerospace & Defense](https://www.protoexpress.com/industries/military-grade-pcb/)
- [Healthcare & Medical PCBs](https://www.protoexpress.com/industries/medical-grade-pcb/)
- [Industrial Manufacturing PCB Services](https://www.protoexpress.com/industries/industrial-pcb/)
- [PCB Manufacturer for Hobbyists](https://www.protoexpress.com/industries/pcb-manufacturer-for-hobbyist/)
- [PCB Solutions for Consumer Electronics](https://www.protoexpress.com/industries/consumer-electronic-pcb/)
- [Automotive PCBs](https://www.protoexpress.com/industries/automotive-pcb/)

---


## Product

- [Sierra Standard Product](https://www.protoexpress.com/products/sierra-standard-product/)
- [RF / MW PCB Manufacturing and Assembly](https://www.protoexpress.com/products/rf-and-microwave-pcbs/)
- [PCB Component Sourcing and Stocking](https://www.protoexpress.com/products/pcb-component-sourcing-and-stocking/)
- [PCB Mass Production](https://www.protoexpress.com/products/pcb-mass-production/)
- [Flying Probe Testing for PCB Assembly](https://www.protoexpress.com/products/flying-probe-testing-for-pcb-assembly/)
- [Online PCB Manufacturing](https://www.protoexpress.com/products/online-pcb-manufacturing/)
- [Turnkey PRO](https://www.protoexpress.com/products/turnkey-pro/)
- [PCB Assembly](https://www.protoexpress.com/products/pcb-assembly/)
- [Controlled Impedance](https://www.protoexpress.com/products/controlled-impedance/)
- [NoTouch PCBs](https://www.protoexpress.com/products/no-touch/)
- [Aerospace & Defense PCBs](https://www.protoexpress.com/products/mil-spec-pcb/)
- [Microelectronics PCBs](https://www.protoexpress.com/products/microelectronics-pcb/)
- [Rigid PCBs](https://www.protoexpress.com/products/rigid-pcb/)
- [HDI PCBs](https://www.protoexpress.com/products/hdi-printed-circuit-boards/)
- [Flex and Rigid-Flex PCBs](https://www.protoexpress.com/products/flex-and-rigid-flex-pcb/)

---


## Tool

- [Stackup Designer](https://www.protoexpress.com/tools/pcb-stackup-designer/)
- [Component Selector](https://www.protoexpress.com/tools/component-selector/)
- [Power Distribution Network Analyzer](https://www.protoexpress.com/tools/power-distribution-network-analyzer/)
- [Sierra Design Portal](https://www.protoexpress.com/tools/sierra-design-portal/)
- [BOM Compare Tool](https://www.protoexpress.com/tools/bom-compare-tool/)
- [Trace Width, Current Capacity and Temperature Rise Calculator](https://www.protoexpress.com/tools/trace-width-and-current-capacity-calculator/)
- [Via Thermal Resistance Calculator](https://www.protoexpress.com/tools/via-thermal-resistance-calculator/)
- [Via Impedance Calculator](https://www.protoexpress.com/tools/via-impedance-calculator/)
- [Maximum Via Stub Length Calculator](https://www.protoexpress.com/tools/maximum-via-stub-length-calculator/)
- [RLC Resonant Frequency and Impedance Calculator](https://www.protoexpress.com/tools/rlc-resonant-frequency-and-impedance-calculator/)
- [Bandwidth, Rise Time and Critical Length Calculator](https://www.protoexpress.com/tools/bandwidth-rise-time-and-critical-length-calculator/)
- [Transmission Line Reflection Calculator](https://www.protoexpress.com/tools/transmission-line-reflection-calculator/)
- [PCB Conductor Spacing and Voltage Calculator](https://www.protoexpress.com/tools/pcb-conductor-spacing-and-voltage-calculator/)
- [Signal and Plane Layer Estimator](https://www.protoexpress.com/tools/signal-layer-estimator/)
- [Via Current Capacity and Temperature Rise Calculator](https://www.protoexpress.com/tools/via-current-capacity-temperature-rise-calculator/)
- [Material Selector](https://www.protoexpress.com/tools/pcb-material-selector/)
- [BOM Checker](https://www.protoexpress.com/tools/bom-checker-tool/)
- [Better DFM](https://www.protoexpress.com/tools/pcb-dfm-tool/)
- [Impedance Calculator](https://www.protoexpress.com/tools/pcb-impedance-calculator/)

---


## Design Guide

- [PCB Fab and Assembly Notes for Designers](https://www.protoexpress.com/pcb-design-guides/fabrication-and-assembly-notes/)
- [Embedded Components Design Guide](https://www.protoexpress.com/pcb-design-guides/embedded-components/)
- [PCB Via Design Guide](https://www.protoexpress.com/pcb-design-guides/via/)
- [IPC Standards Handbook](https://www.protoexpress.com/pcb-design-guides/ipc-standards-handbook/)
- [KiCad 9 Step-by-Step Guide](https://www.protoexpress.com/pcb-design-guides/kicad-9-guide/)
- [PCB Stack-Up Design Guide](https://www.protoexpress.com/pcb-design-guides/pcb-stack-up-design-guide/)
- [Design for Testing Handbook](https://www.protoexpress.com/pcb-design-guides/design-for-testing-handbook/)
- [Soldering Flux eBook](https://www.protoexpress.com/pcb-design-guides/soldering-flux-ebook/)
- [High-Speed Material Design Guide](https://www.protoexpress.com/pcb-design-guides/high-speed-material-design-guide/)
- [Connector Design Guide](https://www.protoexpress.com/pcb-design-guides/connector-design-guide/)
- [RF & Microwave Design Guide](https://www.protoexpress.com/pcb-design-guides/rf-microwave/)
- [Design for Manufacturing Handbook](https://www.protoexpress.com/pcb-design-guides/dfm-handbook/)
- [Differential Pair eBook](https://www.protoexpress.com/pcb-design-guides/differential-pairs/)
- [PCB Transmission Line eBook](https://www.protoexpress.com/pcb-design-guides/pcb-transmission-lines/)
- [Flex PCB Design Guide](https://www.protoexpress.com/pcb-design-guides/flex-rigid-flex-pcb/)
- [HDI PCB Design Guide](https://www.protoexpress.com/pcb-design-guides/hdi-pcb-design-guide/)
- [Controlled Impedance Design Guide](https://www.protoexpress.com/pcb-design-guides/controlled-impedance/)
- [High-Speed PCB Design Guide](https://www.protoexpress.com/pcb-design-guides/high-speed-pcb/)
- [IPC Class 3 Design Guide](https://www.protoexpress.com/pcb-design-guides/ipc-class-3/)
- [Design for Assembly Handbook](https://www.protoexpress.com/pcb-design-guides/dfa-handbook/)
- [KiCad Design Guide](https://www.protoexpress.com/pcb-design-guides/kicad-design-guide/)
- [PCB Material Design Guide](https://www.protoexpress.com/pcb-design-guides/pcb-material-design-guide/)
- [Signal Integrity eBook](https://www.protoexpress.com/pcb-design-guides/signal-integrity-ebook/)

---


## Webinar

- [A Perfect Design Ends with DFA](https://www.protoexpress.com/webinars/perfect-design-ends-with-dfa/)
- [Design Considerations and Simulation for RF Components](https://www.protoexpress.com/webinars/design-considerations-and-simulation-for-rf-components/)
- [Designing for Signal and Power Integrity Using Thin Laminates](https://www.protoexpress.com/webinars/designing-for-signal-and-power-integrity-using-thin-laminates/)
- [Practical Techniques for Ensuring Power Integrity in High-Speed Designs](https://www.protoexpress.com/webinars/practical-techniques-power-integrity/)
- [Techniques for Building Reliable RF PCB Stack-Ups](https://www.protoexpress.com/webinars/techniques-for-building-reliable-rf-pcb-stack-ups/)
- [Designing for Ultra-Linear RF](https://www.protoexpress.com/webinars/designing-for-ultra-linear-rf/)
- [Resolving Common Errors in RF PCB Layout Design](https://www.protoexpress.com/webinars/resolving-common-errors-rf-pcb-layout/)
- [How DFM and DFA Can Save Your RF Prototypes](https://www.protoexpress.com/webinars/how-dfm-and-dfa-can-save-your-rf-prototypes/)
- [Designing for Manufacturing from PCB Stack-Up to Assembly Success](https://www.protoexpress.com/webinars/designing-for-manufacturing-from-pcb-stack-up-to-assembly/)
- [Reliable Surface Finishes for Space and RF Applications](https://www.protoexpress.com/webinars/reliable-surface-finishes-for-space-and-rf-applications/)
- [Opening Closed Eyes](https://www.protoexpress.com/webinars/opening-closed-eyes/)
- [Resolving High-Speed PCB Design Challenges](https://www.protoexpress.com/webinars/resolving-high-speed-pcb-design-challenges/)
- [Power Integrity Challenges and Solutions in AI, Datacenters and HPC](https://www.protoexpress.com/webinars/ai-datacenters-hpc-power-integrity-challenges-and-solutions/)
- [How to Evaluate Crosstalk in High-Speed PCB Interconnects](https://www.protoexpress.com/webinars/how-to-evaluate-crosstalk-in-high-speed-pcb-interconnects/)
- [From Theory to Practice: Implementing EMC Design Rules](https://www.protoexpress.com/webinars/implementing-emc-design-rules/)
- [Design Considerations for Integrating Antennas into RF PCBs](https://www.protoexpress.com/webinars/design-considerations-for-integrating-antennas-into-rf-pcbs/)
- [How to Select Low-Loss Materials for RF and MW Applications](https://www.protoexpress.com/webinars/low-loss-materials-rf-microwave/)
- [Overcoming DDR Routing Challenges with Advanced PCB Design and DFM Practices](https://www.protoexpress.com/webinars/overcoming-ddr-routing-challenges/)
- [Perfecting RF PCB Prototypes with Best DFM Practices](https://www.protoexpress.com/webinars/rf-pcb-prototypes-best-dfm-practices/)
- [AI Enabling New Mindset for Electronics R&D](https://www.protoexpress.com/webinars/ai-enabling-new-mindset-for-electronics-rd/)
- [How to Design PCB Transmission Lines with Controlled Impedance](https://www.protoexpress.com/webinars/how-to-design-pcb-transmission-lines-with-controlled-impedance/)
- [Everything You Need to Know to Get Your First PCB Manufactured](https://www.protoexpress.com/webinars/get-your-first-pcb-manufactured/)
- [Design Strategies for Minimizing Jitter and Insertion Loss in High-Speed PCBs](https://www.protoexpress.com/webinars/design-strategies-for-minimizing-jitter-and-insertion-loss-in-high-speed-pcbs/)
- [Improving PCB Performance with Embedded Resistors and Capacitors](https://www.protoexpress.com/webinars/embedded-resistors-and-capacitors/)
- [Designing for EMC and Preparing a Test Campaign](https://www.protoexpress.com/webinars/designing-for-emc-and-preparing-a-test-campaign/)
- [Introduction to Space Radiation](https://www.protoexpress.com/webinars/introduction-to-space-radiation/)
- [Advanced PCB Design with KiCad: Tips and Tricks](https://www.protoexpress.com/webinars/advanced-pcb-design-with-kicad-tips-and-tricks/)
- [How Good is My Shield? An Introduction to Transfer Impedance and Shielding Effectiveness](https://www.protoexpress.com/webinars/how-good-is-my-shield/)
- [High-Speed PCB Design and VNA Testing](https://www.protoexpress.com/webinars/high-speed-pcb-design-and-vna-testing/)
- [RF Design and Validation with VNA Demonstrations](https://www.protoexpress.com/webinars/rf-design-and-validation-with-vna-demonstrations/)
- [Best Decoupling Capacitor Placement Strategies for PCB Designs](https://www.protoexpress.com/webinars/best-decoupling-capacitor-placement-strategies-for-pcb-designs/)
- [Phased Array or Multi-Channel PCB Design](https://www.protoexpress.com/webinars/phased-array-or-multi-channel-pcb-design/)
- [Unintentional Antennas: Why PCBs and Cables Start Radiating and How You Can Stop It](https://www.protoexpress.com/webinars/unintentional-antennas-why-pcbs-and-cables-start-radiating/)
- [Best RF Design and Layout Practices](https://www.protoexpress.com/webinars/best-rf-design-and-layout-practices/)
- [Using HDI to Improve Signal Integrity and Power Integrity Performance](https://www.protoexpress.com/webinars/using-hdi-to-improve-signal-integrity-and-power-integrity-performance/)
- [Choosing the Right Material for Your RF PCB Designs](https://www.protoexpress.com/webinars/choosing-the-right-material-for-your-rf-pcb-designs/)
- [Dielectric Anisotropy Implications for Transmission Line Impedance and Via Modeling](https://www.protoexpress.com/webinars/dielectric-anisotropy-implications-for-transmission-line-impedance-and-via-modeling/)
- [Signal Integrity for Embedded Computing Applications](https://www.protoexpress.com/webinars/signal-integrity-for-embedded-computing-applications/)
- [How to Design High-Speed and High-Current PCB Traces](https://www.protoexpress.com/webinars/how-to-design-high-speed-and-high-current-pcb-traces/)
- [Best PCB DFM Practices to Avoid Manufacturing Defects](https://www.protoexpress.com/webinars/best-pcb-dfm-practices-to-avoid-manufacturing-defects/)
- [New HDI BGA Breakouts and Routing Strategies](https://www.protoexpress.com/webinars/new-hdi-bga-breakouts-and-routing-strategies/)
- [KiCad for Serious Hardware Development](https://www.protoexpress.com/webinars/kicad-for-serious-hardware-development/)
- [High-Speed PCB Via Design and Manufacturing](https://www.protoexpress.com/webinars/high-speed-pcb-via-design-and-manufacturing/)
- [IPC-2581: Expedite NPI with Smart Design Data Hand-off](https://www.protoexpress.com/webinars/ipc-2581-expedite-npi-with-smart-design-data-hand-off/)
- [7 Habits to Successfully Pass EMC](https://www.protoexpress.com/webinars/7-habits-successfully-pass-emc/)
- [Top 10 Things to Consider When Choosing PCB Materials](https://www.protoexpress.com/webinars/top-10-things-to-consider-when-choosing-pcb-materials/)
- [Copper Foils for High-Speed Digital Applications](https://www.protoexpress.com/webinars/copper-foils-for-high-speed-digital-applications/)
- [HDI Fabrication Problems, Quality Control and Reliability Issues](https://www.protoexpress.com/webinars/hdi-fabrication-problems-quality-control-and-reliability-issues/)
- [PCB Trace Termination Techniques to Ensure Signal Integrity](https://www.protoexpress.com/webinars/pcb-trace-termination-techniques-to-ensure-signal-integrity/)
- [Thermal Design Considerations for SMD PCBs](https://www.protoexpress.com/webinars/thermal-design-considerations-smd-pcbs/)
- [Via Design Techniques to Build Reliable PCBs](https://www.protoexpress.com/webinars/via-design-techniques-to-build-reliable-pcbs/)
- [PCB Layout Guidelines and Grounding Techniques to Avoid EMI and Crosstalk](https://www.protoexpress.com/webinars/pcb-layout-guidelines-and-grounding-techniques-to-avoid-emi/)
- [Strategies to Optimize Propagation Delay in Your PCB Design](https://www.protoexpress.com/webinars/optimize-propagation-delay-in-your-pcb-design/)
- [Design Guidelines to Build Error-Free IPC Class 3 PCBs](https://www.protoexpress.com/webinars/design-guidelines-to-build-error-free-ipc-class-3-pcbs/)
- [Design Considerations for an Error-Free PCB Stack-Up](https://www.protoexpress.com/webinars/design-considerations-for-an-error-free-pcb-stack-up/)
- [Signal Integrity Simulation and Measurement Workflow by Keysight](https://www.protoexpress.com/webinars/signal-integrity-simulation-and-measurement-workflow-by-keysight/)
- [How to Optimize Your Prototype for High-Volume PCB Manufacturing](https://www.protoexpress.com/webinars/how-to-optimize-your-prototype-for-high-volume-pcb-manufacturing/)
- [High-Speed Digital Design to Optimize Signal Integrity on PCBAs](https://www.protoexpress.com/webinars/high-speed-digital-design-to-optimize-signal-integrity-on-pcbas/)
- [Design Considerations to Build Reliable High-Voltage PCBs](https://www.protoexpress.com/webinars/design-considerations-for-high-voltage-pcbs/)
- [Effective Thermal Management Techniques for Reliable Aerospace PCBs](https://www.protoexpress.com/webinars/effective-thermal-management-techniques-for-reliable-aerospace-pcbs/)
- [Stacked and Staggered Vias to Optimize PCB Design and Manufacturing](https://www.protoexpress.com/webinars/stacked-and-staggered-vias-to-optimize-pcb-design-and-manufacturing/)
- [Design Essentials to Maintain Signal Integrity in Class 2 and Class 3 PCBs](https://www.protoexpress.com/webinars/design-essentials-to-maintain-signal-integrity-in-class-3-pcbs/)
- [Design Documentation and How to Communicate Design Intent](https://www.protoexpress.com/webinars/design-documentation-communicate-design-intent/)
- [Flex PCB Design for Manufacturing and Signal Integrity](https://www.protoexpress.com/webinars/flex-pcb-design-for-manufacturing-and-signal-integrity/)
- [Advanced Practices in HDI PCB Design](https://www.protoexpress.com/webinars/advanced-practices-in-hdi-pcb-design/)
- [Stackup Designer and Impedance Calculator Demo](https://www.protoexpress.com/webinars/stackup-designer-and-impedance-calculator-demo/)
- [Flex PCB Design Guidelines for Manufacturing](https://www.protoexpress.com/webinars/flex-pcb-design-guidelines-for-manufacturing/)
- [Steps to Get Your Controlled Impedance Right the First Time](https://www.protoexpress.com/webinars/steps-to-get-your-controlled-impedance-right-the-first-time/)
- [Selecting PCB Materials: Electrical and Manufacturing Considerations](https://www.protoexpress.com/webinars/selecting-pcb-materials-electrical-and-manufacturing-considerations/)
- [Unlock Your Signal Integrity Analysis Potential](https://www.protoexpress.com/webinars/unlock-your-signal-integrity-analysis-potential/)
- [DFM for Flex and Rigid-Flex PCBs Utilizing SMT](https://www.protoexpress.com/webinars/dfm-for-flex-and-rigid-flex-pcbs-utilizing-smt/)
- [PCB Design for Low EMI](https://www.protoexpress.com/webinars/pcb-design-for-low-emi/)
- [How Much Insertion Loss is Too Much](https://www.protoexpress.com/webinars/insertion-loss/)
- [Achieving a Robust PCB Design Workflow for Signal Integrity](https://www.protoexpress.com/webinars/robust-pcb-design-workflow/)
- [It’s All About the Space: A Tribute to Ralph Morrison](https://www.protoexpress.com/webinars/tribute-to-ralph-morrison/)
- [Manufacturing Defects Caused by Land Patterns](https://www.protoexpress.com/webinars/defects-caused-by-land-patterns/)

---


## FAQ

- [PCB Design Support](https://www.protoexpress.com/faq/pcb-design-support-faqs/)
- [PCB Design Tools](https://www.protoexpress.com/faq/pcb-design-tools/)
- [Turnkey PRO](https://www.protoexpress.com/faq/turnkey-pro-pcbs/)
- [No-Touch](https://www.protoexpress.com/faq/no-touch-pcbs/)
- [Standard PCBs](https://www.protoexpress.com/faq/web-order-pcbs/)
- [Ordering PCBs](https://www.protoexpress.com/faq/orders/)
- [Customer Portal](https://www.protoexpress.com/faq/customer-portal/)
- [Impedance Control](https://www.protoexpress.com/faq/controlled-impedance/)
- [Microelectronic PCBs](https://www.protoexpress.com/faq/microelectronics-pcbs/)
- [High-Density Interconnect PCBs](https://www.protoexpress.com/faq/hdi-pcbs/)
- [Military and Aerospace PCBs](https://www.protoexpress.com/faq/milspec-aerospace-pcbs/)
- [ROHS Lead Free PCBs](https://www.protoexpress.com/faq/rohs-lead-free-pcbs/)
- [Better DFM](https://www.protoexpress.com/faq/better-dfm/)
- [Flex and Rigid-Flex PCBs](https://www.protoexpress.com/faq/flex-pcb-prototypes/)
- [PCB Assembly](https://www.protoexpress.com/faq/pcb-assembly/)

---


## Knowledge Base

- [EMI and EMC Resources](https://www.protoexpress.com/kb/emi-and-emc-resources/)
- [RF and Microwave PCB Resources](https://www.protoexpress.com/kb/rf-microwave-resources/)
- [Flex and Rigid-Flex PCB Resources](https://www.protoexpress.com/kb/flex-and-rigid-flex-resources/)
- [Top DFM and DFA Mistakes that Delay Your PCB Production](https://www.protoexpress.com/kb/dfm-and-dfa-mistakes-that-delay-pcb-production/)
- [Solder Mask-Defined Pads Vs. Non-Solder Mask-Defined Pads](https://www.protoexpress.com/kb/solder-mask-defined-vs-non-solder-mask-defined-pads/)
- [PCB Materials Resources](https://www.protoexpress.com/kb/pcb-materials-resources/)
- [PCB IPC Standards Resources](https://www.protoexpress.com/kb/pcb-ipc-standards-resources/)
- [EPIG Surface Finish](https://www.protoexpress.com/kb/epig-surface-finish/)
- [PCB Manufacturing Process](https://www.protoexpress.com/kb/pcb-manufacturing-overview/)
- [High-Speed PCB Resources](https://www.protoexpress.com/kb/high-speed-pcb-resources/)
- [How Thermal Vias Enhance Heat Dissipation in PCBs](https://www.protoexpress.com/kb/how-thermal-vias-enhance-heat-dissipation-in-pcbs/)
- [How PCB Scaling Counteracts Material Shrinkage During Lamination](https://www.protoexpress.com/kb/how-pcb-scaling-counteracts-material-shrinkage-during-lamination/)
- [HDI PCB Resources](https://www.protoexpress.com/kb/hdi-pcb-resources/)
- [IPC-1601 A: PCB Handling and Storage Guidelines](https://www.protoexpress.com/kb/ipc-1601a-pcb-handling-and-storage-guidelines/)
- [Power Integrity Resources](https://www.protoexpress.com/kb/power-integrity-resources/)
- [PCB Via Tenting Design Rules and Fabrication Notes](https://www.protoexpress.com/kb/pcb-via-tenting-design-rules-and-fabrication-notes/)
- [Component Orientation and Polarity](https://www.protoexpress.com/kb/component-orientation-and-polarity/)
- [Signal Integrity Resources](https://www.protoexpress.com/kb/signal-integrity-resources/)
- [How to Add and Identify Pin 1 Marking in Your PCBs](https://www.protoexpress.com/kb/how-to-add-and-identify-pin-1-marking-in-your-pcbs/)
- [PCB Stack-up Resources](https://www.protoexpress.com/kb/pcb-stack-up-resources/)
- [PCB Assembly Resources](https://www.protoexpress.com/kb/pcb-assembly-resources/)
- [PTFE Vs. Non-PTFE RF PCB Laminates](https://www.protoexpress.com/kb/ptfe-vs-non-ptfe-rf-pcb-laminates/)
- [Component and Footprint Resources](https://www.protoexpress.com/kb/component-and-footprint-resources/)
- [PCB Design Resources](https://www.protoexpress.com/kb/pcb-design-resources/)
- [PCB Manufacturing Resources](https://www.protoexpress.com/kb/pcb-manufacturing-resources/)
- [PCB Fabrication Notes](https://www.protoexpress.com/kb/pcb-fabrication-notes/)
- [Jump Scoring in PCBs](https://www.protoexpress.com/kb/jump-scoring-in-pcbs/)
- [PCB File Formats](https://www.protoexpress.com/kb/pcb-file-formats-overview/)
- [How to Export and Get Started with IPC-2581](https://www.protoexpress.com/kb/how-to-export-and-get-started-with-ipc-2581/)
- [Solder Paste](https://www.protoexpress.com/kb/solder-paste/)
- [Different SMD Component Package Sizes](https://www.protoexpress.com/kb/different-smd-component-package-sizes/)
- [IPC Class 3 PCB Design and Manufacturing Standards](https://www.protoexpress.com/kb/ipc-class-3-pcb-design-and-manufacturing-standards/)
- [Types of Circuit Board Surface Finishes](https://www.protoexpress.com/kb/types-of-circuit-board-surface-finishes/)
- [Array Panelization](https://www.protoexpress.com/kb/array-panelization/)
- [E-Test](https://www.protoexpress.com/kb/e-test/)
- [RoHS Lead-Free](https://www.protoexpress.com/kb/rohs-lead-free/)
- [Plated-Through Slots](https://www.protoexpress.com/kb/plated-through-slots/)
- [Castellated Holes or Plated Half-Holes](https://www.protoexpress.com/kb/castellated-holes-or-plated-half-holes/)
- [Via Covering in PCBs](https://www.protoexpress.com/kb/via-covering-in-pcbs/)
- [PCB Component Placement Rules](https://www.protoexpress.com/kb/pcb-component-placement-rules/)
- [PCB Price Composition](https://www.protoexpress.com/kb/pcb-price-composition/)
- [PCB Milling](https://www.protoexpress.com/kb/pcb-milling/)
- [Automated Optical Inspection (AOI)](https://www.protoexpress.com/kb/automated-optical-inspection/)
- [High-Speed Layout Design Rules](https://www.protoexpress.com/kb/high-speed-layout-design-rules/)
- [How to Select a PCB Cable Assembly](https://www.protoexpress.com/kb/how-to-select-pcb-cable-assembly/)
- [Sierra Circuits’ Custom Quote for PCB Fabrication and Assembly](https://www.protoexpress.com/kb/custom-quote-for-pcb-fabrication-and-assembly/)
- [Through-Hole Assembly Design Rules](https://www.protoexpress.com/kb/through-hole-assembly-design-rules/)
- [Rigid-Flex Assembly](https://www.protoexpress.com/kb/rigid-flex-assembly/)
- [DFA Rules](https://www.protoexpress.com/kb/dfa-rules/)
- [Rogers PCB](https://www.protoexpress.com/kb/rogers-pcb/)
- [PCB Layer Orientation](https://www.protoexpress.com/kb/pcb-layer-orientation/)
- [BGA Fanout](https://www.protoexpress.com/kb/bga-fanout/)
- [Blind and Buried Vias](https://www.protoexpress.com/kb/blind-and-buried-vias/)
- [Designing High-Frequency PCBs](https://www.protoexpress.com/kb/designing-high-frequency-pcbs/)
- [BGA Assembly](https://www.protoexpress.com/kb/bga-assembly/)
- [PCB Stack-Up](https://www.protoexpress.com/kb/pcb-stack-up/)
- [DFM Rules](https://www.protoexpress.com/kb/dfm-rules/)
- [Panel Requirements for PCB Assembly](https://www.protoexpress.com/kb/panel-requirements-for-pcb-assembly/)
- [SMT Assembly](https://www.protoexpress.com/kb/smt-assembly/)
- [V-scoring](https://www.protoexpress.com/kb/v-scoring/)
- [Countersink and Counterbore Holes in PCBs](https://www.protoexpress.com/kb/countersink-holes-in-pcbs/)
- [Gold Fingers or Edge Fingers](https://www.protoexpress.com/kb/gold-fingers/)
- [High Tg PCBs](https://www.protoexpress.com/kb/high-tg-pcbs/)
- [PCB BOM File](https://www.protoexpress.com/kb/pcb-bom-file/)
- [Wave Soldering Design Considerations](https://www.protoexpress.com/kb/wave-soldering-design-considerations/)
- [Manual Soldering](https://www.protoexpress.com/kb/manual-soldering/)
- [Mixed Assembly Advantages](https://www.protoexpress.com/kb/mixed-assembly-advantages/)
- [Heavy Copper PCBs](https://www.protoexpress.com/kb/heavy-copper-pcbs/)
- [PCB Material Selection](https://www.protoexpress.com/kb/pcb-material-selection/)
- [Copper for PCBs](https://www.protoexpress.com/kb/copper-for-pcbs/)
- [PCB Substrates](https://www.protoexpress.com/kb/pcb-substrates/)
- [Component Sourcing](https://www.protoexpress.com/kb/component-sourcing/)
- [How to Design Correct PCB Footprints](https://www.protoexpress.com/kb/how-to-design-correct-pcb-footprints/)
- [Solder Mask Layer](https://www.protoexpress.com/kb/solder-mask-layer/)
- [PCB X-Ray Inspection](https://www.protoexpress.com/kb/x-ray-inspection/)
- [Manufacturing Tolerances](https://www.protoexpress.com/kb/manufacturing-tolerances/)
- [Silkscreen](https://www.protoexpress.com/kb/silkscreen/)
- [PCB Assembly Notes](https://www.protoexpress.com/kb/assembly-notes/)
- [Files Required for PCB Fabrication and Assembly](https://www.protoexpress.com/kb/fabrication-assembly-files/)
- [Kitting Guidelines for PCB Assembly](https://www.protoexpress.com/kb/kitting-guidelines/)
- [HASL Surface Finish](https://www.protoexpress.com/kb/hasl-surface-finish/)
- [Lead-Free HASL](https://www.protoexpress.com/kb/lead-free-hasl/)
- [ENIG Surface Finish](https://www.protoexpress.com/kb/enig/)
- [Immersion Silver Surface Finish](https://www.protoexpress.com/kb/immersion-silver/)
- [Hard Gold Surface Finish](https://www.protoexpress.com/kb/hard-gold-surface-finish/)
- [Immersion Tin Surface Finish](https://www.protoexpress.com/kb/immersion-tin/)
- [Intro to PCBs](https://www.protoexpress.com/kb/pcb-basics-overview/)
- [Basic Electronic Components](https://www.protoexpress.com/kb/basic-components-overview/)
- [PCB Design Software](https://www.protoexpress.com/kb/pcb-design-software-overview/)
- [Characteristic Impedance](https://www.protoexpress.com/kb/pcb-design-controlled-impedance/)
- [Design for HDI](https://www.protoexpress.com/kb/pcb-design-hdi/)
- [CAM](https://www.protoexpress.com/kb/cam-for-pcb-prototyping/)
- [ENEPIG](https://www.protoexpress.com/kb/enepig-surface-finish/)
- [Environmental Policy](https://www.protoexpress.com/kb/environmental-policy/)
- [Conflict Minerals Policy](https://www.protoexpress.com/kb/sierra-circuits-conflict-minerals-policy/)
- [Counterfeit Control Policy](https://www.protoexpress.com/kb/counterfeit-control-policy/)
- [Supplier Code of Conduct](https://www.protoexpress.com/kb/supplier-code-of-conduct-policy/)
- [Supplier Quality Requirements](https://www.protoexpress.com/kb/supplier-quality-requirements/)
- [Quality Standards](https://www.protoexpress.com/kb/quality-standards/)
- [Specs for Military Grade PCBs](https://www.protoexpress.com/kb/milspec-aerospace-pcb-specs/)
- [Microelectronics PCB Specs](https://www.protoexpress.com/kb/microelectronics-specs/)

---


## Event

- [RF Series 4/4: RF PCB Thermal Management and Simulation](https://www.protoexpress.com/event/rf-series-rf-pcb-thermal-management-and-simulation/)
- [Seminar: Designing the Routing and Signal Energy Path in Digital PCBs](https://www.protoexpress.com/event/seminar-designing-routing-and-signal-energy-path/)
- [Seminar: Shielding Systems for EMI](https://www.protoexpress.com/event/seminar-shielding-systems-emi/)
- [Seminar: PCB Part Placement Choices, Consequences and Changes](https://www.protoexpress.com/event/seminar-pcb-part-placement-choices-consequences-changes/)
- [Sierrathon - The PCB Design Challenge](https://www.protoexpress.com/event/sierrathon/)
- [Webinar: Dielectric Anisotropy Implications for Transmission Line Impedance and Via Modeling](https://www.protoexpress.com/event/dielectric-anisotropy-implications-for-transmission-line-impedance-and-via-modeling/)
- [Seminar: PCB, Enclosure and Cabling Design to Control EMI](https://www.protoexpress.com/event/pcb-enclosure-and-cabling-design-to-control-emi-by-rick-hartley/)
- [Webinar: Optimizing PCB Transmission Lines to Reduce Signal Losses](https://www.protoexpress.com/event/webinar-optimizing-pcb-transmission-lines-to-reduce-signal-losses/)
- [Webinar: Thermal Design Considerations for SMD PCBs](https://www.protoexpress.com/event/webinar-thermal-design-considerations-smd-pcbs/)
- [Seminar: Science-Based HDI Via Design by Daniel Beeker](https://www.protoexpress.com/event/science-based-hdi-via-design-by-daniel-beeker/)
- [Seminar: Heat Management and High Speed 101](https://www.protoexpress.com/event/heat-management-and-high-speed-101-by-keven-coates/)
- [Seminar: Science of Soldering© by Jim Smith](https://www.protoexpress.com/event/soldering-seminar/)

---