On 20 Aug 2008 16:32:05 GMT, Jim Yanik wrote:

wrote in :

On Wed, 20 Aug 2008 07:54:56 -0400, "David L. Martel"
wrote:

Rick,

I don't think that a home hobbyist will be able to do this. Look at
that
0.05 mm tolerance. How will you measure hundredths of a millimeter?

Dave M.


With a micrometer?



WHY would a PCB -need- such tight tolerances?
what about thermal expansion?

I don't berlieve the OP is using it as a circuit board. He hasn't told
us what mysterious use he has for it, but he did say it wasn't being
used as a circuit board.