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Questions on PCB manufacture

Former Member

Hi all,

 

I am close to getting my PCB manufactured, however I have a few questions to ask regarding my board.

 

It mentions in manual (V6, page 281) that you should leave 2mm free of Copper around the edge of the board.  I have done a Copper pour (ratsnest command) for top and bottom layers, and the gap is 50 mil not 80 mil - how do I change this to 80 mil?

 

Page 281 also mentions identifying Component side and bottom side with CS and BS.  I have done this on layers 1 and 16, but when I run DRC it comes up with 2 errors:  No real vector font, and Width.

 

Finally how do I apply Fiducial marks to the board? 

 

Hope to hear from you soon,

 

 

Cheers,

 

 

Osman.

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  • 0

    Hi Osman,

     

    You are likely fine with your 50mil gap; many manufacturers can handle a much lower gap than that too. Normally the way to do it would have been to have had 5 limits drawn on the edge of the board - t/b/vRestrict and t/bKeepout. The example below shows a corner of a board, with a wider gap on the left side of the board (where it was to slide into metal slots in an enclosure) and a narrower gap at the bottom of the board, for example. Not sure what the vector font issue is (I've not encountered it) but I just place normal text on the board, e.g. a copyright notice. For fiducial marks, you could create a component, or just draw circles on the copper layers, and a slightly larger circle on the t/bStop layers. It's not needed for a hand-assembled board of course. The PCB manufacturer does not need it.

     

    image

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  • 0

    Hi Osman,

     

    You are likely fine with your 50mil gap; many manufacturers can handle a much lower gap than that too. Normally the way to do it would have been to have had 5 limits drawn on the edge of the board - t/b/vRestrict and t/bKeepout. The example below shows a corner of a board, with a wider gap on the left side of the board (where it was to slide into metal slots in an enclosure) and a narrower gap at the bottom of the board, for example. Not sure what the vector font issue is (I've not encountered it) but I just place normal text on the board, e.g. a copyright notice. For fiducial marks, you could create a component, or just draw circles on the copper layers, and a slightly larger circle on the t/bStop layers. It's not needed for a hand-assembled board of course. The PCB manufacturer does not need it.

     

    image

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