Homebrew PCBs

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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