2 Layer Prototype Service

Our famous 2 layer purple prototype production.

Pricing

$5 per square inch, which includes three copies of your design. For example, a 2 square inch board would cost $10 and you’d get three copies of your board. You can order as many copies as you want, as long as they’re in multiples of three.

Turn Times

Orders are sent to fabrication daily, and will ship within 12 days. 95% of our 2 layer orders ship in 8 days.

You can get a quote, approve a design, and pay for an order at OSH Park.

For a faster turn time, you may be interested in our Super Swift Service.

For thinner, lighter, or high current boards, you may be interested in our 2oz-0.8mm Service.

Need more than 100 square inches of boards? Our 2 Layer Medium Run Service is a less expensive option for larger orders.

Common Specs

These specs apply to all our PCB services.

Spec Value  
Manufactured in the United States Yes  
Lead Free compatible Yes  
RoHS Complaint Yes  
High Temp Yes, 175 Tg or higher (see Material Specs)  
PCB Finish ENIG (Gold), compliant with IPC-4552  
Soldermask Type SMOBC (Soldermask Over Bare Copper), both sides  
Silkscreen Type High Res DLP, both sides  

Stackup

Thickness Layer Tolerance
1mil (0.0254mm) silkscreen +/-0.2mil (0.00508mm)
1mil (0.0254mm) solder resist +/-0.2mil (0.00508mm)
1.4 mil (0.0356mm) 1 oz copper  
60 mil (1.5240mm) core +/-6mil (0.1524mm)
1.4 mil (0.0356mm) 1 oz copper  
1mil (0.0254mm) solder resist +/-0.2mil (0.00508mm)
1mil (0.0254mm) silkscreen +/-0.2mil (0.00508mm)

Material Specs

Spec Value  
Substrate 175Tg FR4 Kingboard KB6167F Datasheet
Board Thickness 63mil (1.6mm) nominal  
Dielectric 4.5 at 10Mhz  
Soldermask Color Purple Mask Datasheet
Minimum soldermask web 4 mil (0.1016mm)  
Maximum soldermask alignment 3mil (0.0762mm) Covers retraction, expansion, and shift
Silkscreen minimum line width 5 mil (0.127mm) (recommended minimum)
3 mil (0.0762mm) (short lines, text, graphics)
Silkscreen Datasheet
Maximum board size 16in (406.4mm) by 22in (558.8mm)  
Minimum board size 0.25in (6.35mm) by 0.25in (6.35mm)  

Copper Specifications

Spec Value  
Copper Layers 2  
Copper Weight 1oz  
Trace Spacing 6mil (0.1524mm)
Trace Width 6mil (0.1524mm)
Annular Ring 5mil (0.127mm)
Board Edge Keepout 15mil (0.381) from nominal board edge
Via Plating Thickness 1mil (0.0254mm)  

Drill Specifications

Spec Value  
Minimum Annular Ring 5mil (0.127mm)  
Minumum Drill Size 10mil (0.254mm)  
Minimum Slot Size 20mil (0.508mm) (drill slot only) Additional information on slots
Drill Size tolerance Max: +/- 2.5mil (0.0635mm)
Typical: +/- 1.0mil (0.0254)
 
Drill Positional Tolerance Max: 2mil (0.0508mm)
Typical: <1mil (0.0254mm)
 
Via Tenting Yes (filled hole and flat surface not guaranteed)  
Buried Via false  
Blind Via false  
Castellations Allowed, but not guaranteed Details and recommendations
Maximum Drill Size None Drill sizes above 250mil (6.35mm) will be fabbed, but with larger milling tolerances.