Date:2011-03-11 20:16:50 (8 years 8 months ago)
Author:Werner Almesberger
Commit:021ccdec93310433107897e767da7afb58f03b00
Message:atben/README-PCB: added manufacturing specification/instructions (in progress)

Files: atben/README-PCB (1 diff)

Change Details

atben/README-PCB
1Board characteristics:
2
3- stacking: 2 layers, solder mask on front and back, silk screen on front
4- board material: FR4, thickness 0.8 mm, 1 oz copper
5- surface finish: ENIG (preferred) or tin
6- via holes: diameter is nominally 10 mil, but any size <= 15 mil can be used
7- mechanical tolerances: <= +/- 0.1 mm on all sides
8
9Layer stacking, from top to bottom:
10
11atben-SilkS_Front.gto Front silk screen
12atben-Mask_Front.gts Front solder mask
13atben-Front.gtl Front copper
14atben-Back.gbl Back copper
15atben-Mask_Back.gbs Back solder mask
16
17Other design files:
18
19atben-PCB_Edges.gbr Board edges, for routing (Gerber)
20atben.dxf idem (AutoCAD DXF)
21atben.drl Excellon drill file
22
23Interpretation of files:
24
25- do not print PCB edges on front/back copper
26- do not print component values on silk screen
27- the center (!) of the board edge line marks the true board edge, e.g.,
28
29                             Edge line (5 mil)
30                        =======
31         ------- - - - - - ----------
32               | |
33   PCB outside | | PCB inside
34               | |
35         ------- - - - - - ----------
36                     |
37               Volume removed when cutting
38               (width depends on tool used)

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