Quoth Adam Seychell at 2008-06-05 18:23...
> They could be a different brand/formula photoresist. could you explain
> what problems you had ? Is it negative or positive resist ?
> Was it a exposure, developing issue, or copper residue problem. The only
> problem I've experienced with aged resists (>2 years) is a stubborn
> residual invisible film left behind on the copper surface after
> developing. It requires rigorous developing to remove it, and etching to
> remove the rest.
Adam - I'll fire the same question back at you - with which brand did
you have this specific problem - Kinsten? If so, I'd be interested to
hear as I've got a load of "mature" Kinsten stock that I'm about to use,
having been out of the game for a couple of years.
--
Matthew Smith
Smiffytech - Technology Consulting & Web Application Development
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