Root/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 (1/32"), 1 oz copper
5- surface finish: ENIG recommended
6- via holes: diameter is nominally 10 mil, but any size <= 15 mil can be used
7- ground via of the antenna: hole diameter is nominally 8 mil, but any size
8  <= 15 mil can be used
9- mechanical tolerances: <= +/- 0.1 mm on all sides
10
11
12Layer stacking, from top to bottom:
13
14atben-SilkS_Front.gto Front silk screen
15atben-Mask_Front.gts Front solder mask
16atben-Front.gtl Front copper
17atben-Back.gbl Back copper
18atben-Mask_Back.gbs Back solder mask
19
20
21Other design files:
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23atben-front.png Illustration of the PCB's front side
24atben-back.png idem, for the back side
25atben-PCB_Edges.gbr Board edges, for routing (Gerber)
26atben.dxf idem (AutoCAD DXF)
27atben.drl Excellon drill file
28atben-SoldP_Front.gtp Front solder paste, for stencil
29
30
31Interpretation of files:
32
33- for all coordinates, the origin is the lower left corner of the board
34- the center (!) of the board edge line marks the true board edge, e.g.,
35
36                             Edge line (5 mil)
37                        =======
38         ------- - - - - - ----------
39               | |
40   PCB outside | | PCB inside
41               | |
42         ------- - - - - - ----------
43                     |
44               Volume removed when cutting
45               (width depends on tool used)
46

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