Homebrew PCBs

The problem with this is the non-zero width of the PCB. Depending on
how you hold things together the films can shift one side relative to
the other. A better method is to stick the films to PCB cutoff strips,
or an L-shape. Insert a piece of clear acrylic or glass while aligning
the two sides instead of the PCB. This gives very exact results,
probably the best you can get without alignment pegs.

Vacuum holddown is highly recommended, it is easy to make by covering
the film/artwork stack with a framed sheet of flexible clear plastic
and applying vauum to that.

ST


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On Tue, Jan 26, 2010 at 7:29 PM, David Griffith <dgriffi@cs.csubak.edu> wrote:

> I'm told that taping the stencils face-to-face to create a pouch makes for
> good registration.  Any opinions on this?
>