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NoTouch PCB, quickturn proto pcb, prototype fabrication, 2 - 6 layers

No Touch PCB

Our No Touch self-service ordering system enables you to specify two-layer, four-layer, and six-layer prototype PCBs entirely online for quickturn delivery at the minimum cost. Using No Touch, you can automatically verify your design, get a quote, and submit your order in one smooth transaction.

QUOTE/ORDER No Touch PCBs

mail notouch@protoexpress.com

Highlights
  • 2, 4, 6 layer low-cost, quickturn prototype PCB fabrication
  • Pre-defined specifications
  • Automatic file verification
    • Free instant DFM on your files
    • Find whether your design matches No Touch specs
    • See layer images as seen by our system to ensure proper registration, polarity etc
    • Get a Netlist compare report
  • No holds processing
  • Minimum finished hole size down to 8 mils
  • Trace /space down to 4 mils
  • Now allows 0.250" (250 mils) Non-Plated Holes
  • Both HASL and Lead-free HASL surface finishes available.
    (If you need your boards to be RoHS compliant, choose Lead-Free HASL finish)
  • Instant online quoting, ordering and tracking
No Touch PCB Specifications
No Touch Design Guidelines/Specs
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
  • Turn-time 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 Lead-free HASL (RoHS compliant) 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 No Touch 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 inches (250 mils). Also note that non-plated holes must not touch any copper.
    Soldermask Green LPI only; we recommend that openings in the soldermask layers should be 0.003 in. larger than the copper feature on each side.
    Example: If you have a rectangular pad then soldermask 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

    No Touch PCBs are simple, standard technology PCBs. For example, the following features are NOT ALLOWED in No Touch 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 III, Milspec, or ITAR jobs
  • Outline and Corners
  • 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.
    Filled Areas Cross hatching is not allowed. Many CAD systems leave gaps in fill areas when using 45-degree lines. For No Touch, 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 No Touch product. Please use our Web PCB offering instead, if electrical testing is required.
    Shipping options
  • No Touch 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 FAQ's 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.
  • How to Quote and Order 1. Login to our website and get an Instant Online Quote
    2. Upload your Gerber files
    3. Assign layer and drill information (easy to do)
    4. Wait a few minutes for our Auto File Verification (AFV) program to check your design
    5. Place an order online using credit card.

    No Touch Standard Stackups

    Below are Sierra's standard stackups for 4 and 6 layer NoTouch PCBs.

    Standard 4 Layer Stackup

    Layer Type Thickness
    1 Foil 0.70 oz Plating: 1.25
    Prepreg 13.00 2x1080 / 2x2113
    2 Copper 1.40 oz
    Core 28.00 NP-175
    3 Copper 1.40 oz
    Prepreg 13.00 2x1080 / 2x2113
    4 Foil 0.70 oz Plating: 1.25
    Total thickness 60.70

    Standard 6 Layer Stackup

    Layer Type Thickness
    1 Foil 0.70 oz Plating: 1.25
    Prepreg 7.50 2x 2113
    2 Copper 1.40 oz
    Core 14.00 NP-175
    3 Copper 1.40 oz
    Prepreg 7.50 2x 2113
    4 Copper 1.40 oz
    Core 14.00 NP-175
    5 Copper 1.40 oz
    Prepreg 7.50 2x 2113
    6 Foil 0.70 oz Plating: 1.25
    Total thickness 60.00

    Contact a representative at (800)763-7503 if you have questions!