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January 1998

DesignerCouncil@IPC.ORG
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Subject:
Re: Flex Boards
From:
Scott Davis <[log in to unmask]>
Reply To:
DesignerCouncil Mail Forum.
Date:
Thu, 8 Jan 1998 15:22:07 -0600
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Wayne,

There are a couple of concerns of letting the copper extend to the board edge.

1) Reduced die life.  If this is a hi-volume product this could be a factor.

2) Encapsulation.  If you are using a film dielectric for coverlay/solder mask you have introduced a spot for potential delimitation.

3) Edge definition.  If this is a lower volume job being die cut with a steel rule die, it has the potential to have a "ripple" look along the edge.

4) Sharp.  The edge of flex circuits that have the copper extend to the cutline are very sharp.  That copper foil can produce a lot of paper type cuts for your operators.

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