No Touch PCBs

Automated Bare Boards

Small projects are important too. Manage your own design and manufacturability with our DFM report and get a discounted price on simple bare boards that still meet Sierra’s standard for quality.

  • 2, 4, 6-layer boards
  • FR-4 material, 0.062” thick
  • HASL or ENIG finish
  • Green Solder Mask, White Legend
  • 4-mil trace/space available
  • Automated DFM before you order

Turnkey Pro

Bundled Fab & Assembly

Save time and money on these full turnkey boards. Start with your BOM and get an instant quote for fabrication, assembly, and components with an intuitive online ordering system. Manage your order online and work directly with engineers.

  • Fully Assembled in 5 days
  • 2, 4, 6, 8-layer boards
  • 4-mil trace/space
  • BOM check
  • DFM & DFA checks by experienced engineers
  • Assembly and components included

No Touch PCB Specifications

Layers

2, 4 and 6-layer boards made to IPC-600 Class 2 specs.

Data required

Gerber files in RS-274X format only (Extended Gerber) or ODB++ format. Do NOT use Gerber X2 format!

AND

Excellon drill file in ASCII format with the following parameters:

Units = Inch

Tool units = Inch

Coordinate = Absolute

Zeros omitted = Trailing

Number format = 2.4

Turntime

1, 2, 3, 4 and 10 business days. (When will my boards ship if I order today?)

Cut-off time

5 p.m. Pacific Time (All orders received on a weekday until 5 p.m. will start the next weekday as Day 1).

Minimum order

No minimum quantity, but the more you order, the more you save.

Maximum area

100 sq. in. Note: The board X or Y dimension should not exceed 15.9 in. or be less than 0.5 in.

Material

FR-4 lead-free material.

Thickness

0.062 in. (+/- 0.006 in.). No special constructions are allowed. Our standard construction will result in the overall thickness.

Surface finish

Choose ENIG or HASL.

Minimum hole size

0.008 in. (8 mils) finished hole size allowed.

Minimum trace and space

0.004 in. (4 mils) minimum trace and space widths.

Minimum width of annular rings

0.005 in. This means your pad diameter must be at least 0.01 in. (10 mils) larger than the finished hole size.

Copper weights

1 oz. on outer layers: We start with 0.5-oz. foil and after plating, it becomes about 1 oz. Inner layers have 1 oz copper.

Maximum hole density

Hole density is calculated using the following formula:

Hole density = Total holes on individual board / Area of one board

Hole density specifications for NoTouch PCBs are as follows:

  • For boards up to 1 sq. in.: We allow up to 100 holes/sq. in.
  • For boards between 1 and 2 sq. in. area: We allow up to 75 holes/sq. in.
  • For boards larger than 2 sq. in.: We allow up to 50 holes/sq. in.

Maximum plated hole size

0.246 in.

Maximum non-plated hole size

0.250 in. (250 mils). Also note that non-plated holes must not touch any copper.

Solder mask

Green LPI only; we recommend that openings in the solder mask layers should be 0.003 in. larger than the copper feature on each side.

Example: If you have a rectangular pad then solder mask opening around the pad will be overall 0.006 in. larger in each dimension.

Please note: To ensure proper solder mask adhesion between solder mask clearances, we now require a minimum of 0.004” (4 mils) between the solder mask clearances.

Legend/silkscreen

White only. Silkscreen is allowed on top and bottom of the printed circuit board.

The minimum width of legend lettering is 0.005 in.

Restrictions

NoTouch PCBs are simple, standard technology PCBs. For example, the following features are NOT ALLOWED in NoTouch orders:

  • Arrays
  • Steps and repeats
  • Internal cutouts/slots
  • Milling
  • Blind/buried vias
  • Special processes (for example counter bores, counter sinks)
  • Multiple parts or part numbers (a $10 charge applies to each additional part)
  • Class 3, mil-spec, or ITAR jobs

Getting your NoTouch PCBs assembled by Sierra?

If you send your NoTouch PCB for assembly in Sierra Circuits (say, using our Web PCB service), please note that:

  1. You accept that these NoTouch PCBs are not electrically tested. You agree to carry all the risk of assembling electrically un-tested PCBs.
  2. Sierra will add one (or possibly 2) buffer day(s) after NoTouch order is delivered, before starting assembly. This extra day is required to order components / do kit audit.

Filled areas

Board outline is required for all orders and should be placed on one of your solder mask layers. If there is no solder mask, then place the outline on one of your “working” layers. We allow irregular shapes, but please ensure the board does not have more than 16 edges.

For rounded corners, the radius of the corner must exceed 0.05 in.

NOTE: We reserve the right to cancel orders that have excessively complex routing. Such orders can be accomplished through our Web PCB or custom order systems.

Outline and corners

Cross hatching is not allowed. Many CAD systems leave gaps in fill areas when using 45-degree lines. For NoTouch, you must use 0-degree and/or 90-degree lines to do the fill.

Please make the filled areas using 0.01 in. outlines with 0.001 in. overlap.

Notches

Notches are allowed. You can have up to 6 notches, but every notch must be at least 0.1-in. wide. If a notch is less than 0.1 in., our router may ignore your spec and make it our minimum width.

Electrical testing

Not offered on our NoTouch product. Please use our Web PCB offering instead, if electrical testing is required.

Shipping options

  • NoTouch PCBs ship by FedEx or UPS only. You can use your FedEx or UPS account number, if you wish.
  • Also, Will Calls are allowed for a $15 service charge.

Payment terms

Credit card only

Data guidelines

Customer must be careful about accurately doing layer assignment in the online system. Customer must also accurately put in polarity (positive or negative) information for the layers.

See FAQs online for details on how we define positive vs negative polarity for different layers.

Additional requirements

  • All layers must be aligned and NOT mirrored.
  • The layers should provide a view as though you were looking at it from top straight down to the bottom. To ensure this, we recommend double-checking this through a Gerber viewer; not simply relying on the view from your design software.
  • Occasionally, we notice a misalignment problem before the board is built, and we may correct it for you. But, generally, it is YOUR responsibility to make sure your layers are aligned correctly and not mirrored.

Note: We put a small 6-digit order # on each board for easy identification during fab process. This will either appear on the top or bottom silkscreen or etched into the bottom copper layer.

Sierra standard stack-ups for 2, 4, and 6-layer NoTouch PCBs.

In our NoTouch PCB service, while we will typically use the constructions shown, we reserve the right to change them at any time without notification. (E.G. within the given overall thickness the dielectric thicknesses may change.)

Turnkey Pro Fabrication & Assembly Capabilities

Board Type Only rigid boards. Turnkey Pro service provides both fabrication and full assembly of your boards (including component procurement).
Board ShapeWe expect boards to be generally rectangular in shape. Notches, cutouts and slots are allowed (some restrictions shown below).
Board SpecBoards will be built to IPC-6012 Class 2 Spec. However, in this online offer, we do not provide any microsection certificates or IPC coupons to customers.
Fabrication of ITAR designated jobs?No
RoHS Available?Yes, your board can be RoHS if you choose RoHS-compliant surface finish (ENIG). You have an option to not have any RoHS markings on your board if you so choose.
Layers Allowed2 layers, 4 layers, 6 layers, 8 layers
LaminationsSingle lamination double-sided or multi-layer boards only. In this online offer, we do not provide boards that need multiple laminations or have HDI features.
Blind ViasNo
Buried ViasNo
High-Density Interconnect (HDI)No. In this online offer we only provide single lamination PCBs with through-hole vias.
Non-plated HolesYes
Via-in-PadsWe can manufacture your PCBs that have via-in-pad features. An extra process of non-conductive filling will be done on all vias, to ensure good soldering at assembly. Such vias must be 6 mils or more in size. In Turnkey Pro service, we only offer 7 days, 10 days and 15 days turnkey when your board has via-in-pad features.
Data for PCBsFor PCBs: We prefer RS-274X extended Gerber format. If your file is not in RS-274X, send an aperture file. Please see FAQs below for what files to include.
Data for AssemblyFor assembly: You will need to upload your BOM (excel format) online for quoting. In the final package, we will need the assembly drawing and XY data also. See sample BOM format.
Turnkey Turntimes5 days, 7 days, 10 days and 15 days
Cut-off Time5:00 PM. Day 0 begins when validation is done or the final consigned components are received, whichever is later.
Order QuantitiesFor most designs, any quantity from 2 through 100 assembled PCBs available. Some limitations apply based on the number of panels to be produced and the turntime expected. To enable this service for larger quantities, please contact LoisT@protoexpress.com.
Maximum Board SizeMust fit a 10″ x 16″ box. The area must be less than 150 square inches.
Minimum PCB Dimensions.5″
Maximum PCB Dimensions15.9″
MaterialFR-4 lead-free (370HR material)
Thickness & Thickness Tolerance0.062″, 0.031″ or 0.093″ with thickness tolerance of +/- 10%
ArraysArrayed designs are not allowed. Your PCB design must have just a single image of a single board. (Our engineers will array it as needed for Sierra assembly and finally ship you fully-assembled individual boards.)
Minimum Trace/Space4 mils
Standard Copper OverplateSurface pattern: Nominal 1 oz/sq foot. (0.0013″ to 0.002″) (33 microns to 51 microns)
Outer Layers Copper (Finished)1 oz or 2 oz (number of ounces of copper per square foot on outer layers.) Specify this as “finished” copper weight. 1 oz. is the most commonly-used finished copper weight. We start with ½ oz foil and plate up to 1 oz. If you specify 2 oz. as your finished copper weight, the minimum trace /space on your board must be at least 6 mils.
Inner Layers Copper80 holes/square inch
Minimum Annular Ring Width0.006″
Minimum Air Gap0.004″ (space between any two copper features)
Minimum Inner Layer Drill-to-Copper Spacing0.013″ (applies to both plated and non-plated holes)
Controlled DielectricIn this online service, you cannot specify controlled dielectric, but we offer +/-10% controlled impedance (see below).
Controlled ImpedanceThis means in your design, you are specifying the width of certain traces and spacing to achieve a specific resistance. In your impedance modeling, use the Dk for material 370HR. We expect that, in your fab drawing, you will have an impedance table that CLEARLY identifies the target impedance(s), the layer(s) on which they exist and the specific trace widths/spaces to be controlled. See a sample format for impedance table. Do note that in this online service, our controlled impedance offering has certain limitations: Only offered for boards up to 6 layers only available with +/- 10% tolerance. You can have controlled impedances on up to four different layers on your board. On any layer, you can have up to two different controlled impedances. Our engineers will meet your controlled impedance requirements using our own stack-up. (All we need is your controlled impedance info. We do not need and may not use any specific controlled dielectric information you provide.) If your controlled impedance requirements exceed this spec, please ask for a custom quote.
Multiple Parts in one designTo keep our online service low-priced and hassle-free, we keep it simple. We do not allow different PCB designs and multiple BOMs to be combined in one order. Our system can only accept design files for a single circuit board with a single BOM. We cannot merge BOMs, de-duplicate multiple BOMs, etc.
SoldermaskGreen, blue or black
Legend/ SilkscreenWhite
Notches, Cutouts and SlotsUp to 3 plated slots allowed per board. Up to 10 non-plated slots allowed per board. Up to 10 cutouts allowed per board. Up to 10 notches allowed per board. (If any of the above allowances are exceeded in your design, we can still process it for a minimum $100 extra lot charge on your order. We will get your approval before doing so.) Minimum inside radius (for any notch, cutout or slot) = 20 mil (0.02″). Minimum width (of any notch, cutout or slot) = 40 mil (0.04″).
LogoVendor markings include Company Logo, UL marking, Flammability, etc. Such vendor markings will be put in Silkscreen.
IPC coupons & Microsection reportsNot provided in this online offering. Only available in custom ordered products.
Electrical Testing100% net-list testing on every board.
Shipping OptionsFedEx/UPS, Will Call. You can use your own FedEx/UPS account number. International shipments allowed. All duties/customs are the responsibility of the customer.
Payment TermsCredit card (PO allowed for select customers who have set up credit terms). Payment link convenience: If your purchasing department typically puts in credit card number, you can still place an order and our system will email a payment link to that person. Order will start when payment information is received.
RestrictionsIf your board has via-in-pad features, only 7 days, 10 days and 15 days turnkey quotes allowed (you cannot quote for 5 days turnkey). If you want faster turn times, you may use our custom quote service).
Assembly Class SpecsIPC-A-610-Class2
Assembly of ITAR designated jobs?No
Assembly on both sidesYes
Minimum Passive Component Size0201 (inches)
BGA Minimum Pitch0.5 mm. BGAs cannot have more than one ball size nor more than one pitch.
Minimum Pitch of Other Components0.4 mm
Maximum number of Through-hole Components20 per board
Minimum Component Pad SizeMinimum 8 mils x 8 mils or 8-mil diameter
Not allowed in Turnkey Pro ServiceOur Turnkey Pro online service provides standard assembly, and has the following limitations:
Wire-bonding, conformal coating, underfills, staking, POP assembly, wire assembly, or cable assembly are not allowed.
Rework like cutting traces, soldering wire jumpers, and cables onto the boards are not allowed.
Assembly of special items like PEM nuts, turrets terminals, rivets, and press-fit connectors are not allowed.
(To get any of these extra assembly features, please ask for a custom quote.)

More Questions About Ordering No Touch Or Turnkey Pro?

Talk To A Representative

Toll free: (800) 763-7503
Phone: (408) 735-7137

Check Our FAQ pages

Turnkey Pro FAQ

No Touch FAQ