On 29-Apr-07, at 6:15 AM, fredbutz wrote:
>
> But now I want to do a double sided board.
>
> Does anyone have any suggestions for lining the sides up
>
I used to make positive art work for both sides, align the two sides
visually, tape the two together along two edges and go from there.
Lately, I'm thinking about making each PC side independently on .031
inch thick single sided and gluing the two cards together.
The advantage is there is no need for artwork registration just
before exposure. The artwork registration comes from the CAD program
(Canvas�) in its layers.
After assembly, the two PC cards are also held together by small
rivets that act as plated through holes. There aren't many of these
as the circuitry is mostly surface mount with some three pin
regulators and grounds.
Terry M
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