Method of making printing plates and printed circuit

Details Method of making printing plates and printed circuit Method of making printing plates and printed circuit

1978-05-19

1980-03-18

Brammer, Jack P.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making electrical device

430313, 20415918, 2041592, 430281, 430286, G03C 500, G03C 168

Patent

active

041937996

ABSTRACT:
Curable compositions are provided based on the use of an aromatic onium salt with a blend of epoxy resin and polyvinyl acetal resin. The curable compositions in the form of a cast film can be used directly as a dry film photoresist by being applied to a substrte, such as a copper clad laminate, and cured with ultraviolet light.

REFERENCES:
patent: 3100702 (1963-08-01), Rauner et al.
patent: 3552963 (1971-01-01), Notley et al.
patent: 3785821 (1974-01-01), Notley
patent: 3821167 (1974-06-01), Asano
patent: 4026205 (1977-05-01), Crivello
patent: 4090936 (1978-05-01), Barton

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