mirror of
git://projects.qi-hardware.com/ben-wpan.git
synced 2024-11-26 17:59:41 +02:00
eac6e3c70b
- README-PCB: added imperial units for board thickness - README-PCB: changed surface finish recommendation to prefer ENIG more strongly - README-PCB: removed instructions for Gerber file generation from "interpretation of files section" - README-PCB: mention common coordinate system origin
39 lines
1.2 KiB
Plaintext
39 lines
1.2 KiB
Plaintext
Board characteristics:
|
|
|
|
- stacking: 2 layers, solder mask on front and back, silk screen on front
|
|
- board material: FR4, thickness 0.8 mm (1/32"), 1 oz copper
|
|
- surface finish: TBD, ENIG is preferred
|
|
- via holes: diameter is nominally 10 mil, but any size <= 15 mil can be used
|
|
- mechanical tolerances: <= +/- 0.1 mm on all sides
|
|
|
|
Layer stacking, from top to bottom:
|
|
|
|
atusb-SilkS_Front.gto Front silk screen
|
|
atusb-Mask_Front.gts Front solder mask
|
|
atusb-Front.gtl Front copper
|
|
atusb-Back.gbl Back copper
|
|
atusb-Mask_Back.gbs Back solder mask (empty)
|
|
|
|
Other design files:
|
|
|
|
atusb-PCB_Edges.gbr Board edges, for routing (Gerber)
|
|
atusb.dxf idem (AutoCAD DXF)
|
|
atusb.drl Excellon drill file
|
|
|
|
Interpretation of files:
|
|
|
|
- for all coordinates, the origin is the lower left corner of the board
|
|
- do not print component values on silk screen
|
|
- the center (!) of the board edge line marks the true board edge, e.g.,
|
|
|
|
Edge line (5 mil)
|
|
=======
|
|
------- - - - - - ----------
|
|
| |
|
|
PCB outside | | PCB inside
|
|
| |
|
|
------- - - - - - ----------
|
|
|
|
|
Volume removed when cutting
|
|
(width depends on tool used)
|