Light-sensitive composition and process

Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Forming nonplanar surface

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430280, 430311, 430315, 430324, 430330, 430327, 430935, G03C 500

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active

053976851

ABSTRACT:
A photoimageable composition and process for use of the same. The composition comprises a binder that is a mixture of a phenolic resin and a multifunctional epoxy or vinyl compound and a curing system comprising a photoactive compound capable of generating a curing catalyst capable of crosslinking the binder components. The process for use of the composition comprises application of the composition to a substrate, drying of the same, exposing the dried coating to activating radiation, curing the binder in light exposed areas, developing the coating and thermally curing the developed image. The composition is especially useful as a solder mask.

REFERENCES:
patent: 4581321 (1986-04-01), Stahlhofen
patent: 5206116 (1993-04-01), Daniels et al.
Crivello, James V., "Possibilities For Photoimaging Using Onium Salts", Presented at a Regional Technical Conference of the Society of Plastic Engineers, Inc. on Nov. 8, 9, and 10, 1982.

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