Masking of electrical printed circuit boards

Details Masking of electrical printed circuit boards Masking of electrical printed circuit boards

1984-07-27

1986-07-22

Thomas, Alexander S.

Stock material or miscellaneous articles

Layer or component removable to expose adhesive

Halogen containing compound

428345, 428350, 428516, 428520, 428332, 118505, B32B 706, B32B 712

Patent

active

046019340

ABSTRACT:
A masking for use in connection with the manufacture of circuit board comprising a polyvinyl alcohol film, which is uniformly annealed to be free of stress and strains and which is water-soluble at a temperature of 120.degree. F. A water-soluble adhesive, having a stiffness of between about medium soft and about medium, is placed on the film, and the masking material has a moisture level of below about 2% by weight.

REFERENCES:
patent: 2632921 (1953-03-01), Kreidl
patent: 3296011 (1967-01-01), McBride et al.
patent: 4444839 (1984-04-01), Dudzik et al.

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