Has anyone some experience with diffusion paper ?

used while exposing ED resist in order to expose
the inside of the non-plated holes.

What types of paper exist, thicknesses, diffusion factors ?

Are some of the japaneses using ED technology willing
to share their experience ? Either avoiding diffusion papers
in using other exposure technics / machines !

Any suggestion welcome.

Regards
Roland

Roland Jaquet         Technical Director
Henri Jaquet SA       PCB manufacturer
Geneva Switzerland    Prototypes and small qties
tel. xx41-22-794-7878 fx. xx41-22-794-3052
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