After Dark
Clear soldermask on a black substrate for stylish boards with easy debugging.
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 will ship within 12-21 calendar days of ordering.
You can get a quote, approve a design, and pay for an order at OSH Park.
Common Specs
These specs apply to all our PCB services.
| Spec | Value | |
|---|---|---|
| Manufactured in the United States | Yes | |
| Lead Free compatible | Yes | |
| RoHS Compliant | 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 |
|---|---|---|
| 0.6 mil (0.0152mm) | silkscreen | +/-0.2mil (0.00508mm) |
| 0.6 mil (0.0152mm) | 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 | |
| 0.6 mil (0.0152mm) | solder resist | +/-0.2mil (0.00508mm) |
| 0.6 mil (0.0152mm) | silkscreen | +/-0.2mil (0.00508mm) |
Material Specs
| Spec | Value | |
|---|---|---|
| Substrate | Black 180Tg FR4, opaque light blocking | Ventec VT 447 b Datasheet.pdf |
| Board Thickness | 63mil (1.6mm) nominal | |
| Dielectric | 4.35 at 1GHz | |
| Soldermask Color | Clear | 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 | No | |
| Blind Via | No | |
| Filled+Plated Vias (via-in-pad) | No | |
| Overlapping drills | Allowed, but not guaranteed. May result in missing or slotted holes. 5 mil (0.127mm) clearance is recommended between holes. |
|
| 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. |
