March 9th, 2021
Our Silicon Valley facility is deemed "essential" and is fully operational to support medical, defense & other printed circuit board fabrication and assembly projects.
For your more complex boards, please send your quote request to files@protoexpress.com
You can also quote and order standard technology PCBs/Assembly online on this website.

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Sierra Circuits
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Full Turnkey PCBs, Manufactured in The United States

You Dream. We Deliver.

Turnkey Pro by Sierra Circuits

PCB Fabrication, Component Procurement, and Assembly.

  • Bundled together in an entirely-online process.
  • Reviewed and tested by Engineers.
  • DFA & DFM Checks on every order.
  • Shipped from Silicon Valley in as fast as 5 days.
Start Your Quote

High-Speed PCBs, Manufactured in The United States

You Dream. We Deliver.

Advanced PCBs by Sierra Circuits

Custom boards with a dedicated account manager and stack-up assistance.

  • Complex PCB requirements.
  • Mil-spec & Class 3 with HDI features.
  • Blind & Buried Vias.
  • Flex & Rigid-Flex boards.
Start Your Quote

Order the PCB that’s right for you.

Advanced PCBs

Custom quote and order with a dedicated account manager and stack-up assistance

• Complex PCB requirements
• Special stack-up help / NPI review
• Files evaluated by engineers
• Quote sent by email within a few hours

• Mil-spec/Class 3
• HDI features
• Blind/buried vias
• Metal-core
• Flex/rigid-flex

GET A QUOTE

Fab + Assembly

Instantly quote and order boards online with full turnkey options

Fabrication
• Standard technology PCBs
• More surface finishes/materials
• Complete DFM check
• Via-in-pad feature available
• 1-day turntime available

Assembly
• In-house assembly (optional)
• Complete DFA check and flying probe testing available
• Component engineering assistance and procurement

GET A QUOTE

Self Service Boards

Automated PCB fabrication for simple technology

• Completely self-service
• Fast and easy online ordering
• Bundled PCB & Assembly available
• Quickturn available
• Turnkey Pro service included
• NoTouch service included

GET A QUOTE

Get on board with Sierra Circuits

Designers choose Sierra because…

We inform and educate.
We do the technology others won’t even try.
We prototype faster than the rest.

This is what our customers are saying about us.

“Sierra will do things the others won't try.”

-Garry Motter
SciMeasure 

“Sierra does good, reliable work. As a technology leader, I know I can count on Sierra to fabricate using even the most advanced process design rules whenever I need to, and to deliver on time.”

-John Carlsen
Syncopated Systems

“Sierra provided us high quality boards, perfectly assembled and in a very short amount of time!”

-Josh Sharpe
Macchina

How To Handle Current Return Path for Better The Signal Integrity

Before we start with today’s article, something needs to get engraved in your minds. If some current goes out somewhere, it will always come back to the source, with no exceptions. Hence, there is always a current loop, a current return path along with the current-carrying traces. So, the current does not really care if you provide it that return path, it will find its own. But if you do not, it will interfere and mess around with your entire circuit, while finding its own way back.

Learn More

About Sierra
  • The Sierra Touch
  • Story of Sierra
  • Our Team
  • Certification
  • Careers
  • Terms & Conditions
CAPABILITIES
  • Rigid PCB
  • PCB Assembly
  • Flex & Rigid-Flex PCB
  • HDI (Blind & Buried Vias)
  • Microelectronics PCB
  • Mil-Spec & Aerospace PCB
  • Controlled Impedance
  • Our Equipment
  • PCB Design
FAQs
  • General FAQ
  • Assembly FAQ
  • HDI PCBs FAQ
  • Flex PCBs FAQ
  • Controlled Impedance FAQ
  • Microelectronics FAQ
  • FAB + Assembly FAQ
  • No-Touch PCB FAQ
  • Turnkey Pro FAQ
TOOLS
  • BOM Checker
  • PCB Stackup Planner
  • PCB Material Selector
  • Impedance Calculator
  • Better DFM

Sierra Circuits, Inc.

1108 West Evelyn Avenue

Sunnyvale, CA 94086, USA

Phone: (800) 763-7503


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