Those 45 degrees pads.. how is it done in Gerber?

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mike@ihatespammers.com - 30 Jul 2007 12:35 GMT

Hello,
I wrote my own PCB design software, which outputs Gerber and raster.
One thing that puzzles me, when I see some PCB's (made by others) where
the surface mount IC's are at a 45 degrees angle vs the rest is, how do
they define those IC pads in Gerber? It can't be done with a traditional
rectangular aperture flash (code D03, the one normally used to make pads)
as far as I know, because those are either horizontal or vertical, so
those 45 degrees pads must be done as traces (Gerber code D01), right?

Thank you!
Mike

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qrk - 30 Jul 2007 18:06 GMT

>Hello,
>I wrote my own PCB design software, which outputs Gerber and raster.
[quoted text clipped - 7 lines]
>Thank you!
>Mike

The stuff coming out of Orcad Layout is done as a bunch of regular
draws, not as a single aperture.

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Geo - 30 Jul 2007 18:41 GMT

>I wrote my own PCB design software, which outputs Gerber and raster.
>One thing that puzzles me, when I see some PCB's (made by others) where
[quoted text clipped - 3 lines]
>as far as I know, because those are either horizontal or vertical, so
>those 45 degrees pads must be done as traces (Gerber code D01), right?

Flash a Diamond (a square at 45 degrees) at each end then draw between them.

Geo

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DJ Delorie - 31 Jul 2007 21:27 GMT

In PCB, I draw them as polygon fills if they have square ends, or as
traces if they have rounded ends.

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Guillaume - 31 Jul 2007 21:38 GMT

> Hello,
> I wrote my own PCB design software, which outputs Gerber and raster.
> One thing that puzzles me, when I see some PCB's (made by others) where
> the surface mount IC's are at a 45 degrees angle vs the rest is, how do
> they define those IC pads in Gerber?

Aperture macros.

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Electronics Forum / CAD / July 2007

Those 45 degrees pads.. how is it done in Gerber?