Chalcogenide product

Radiation imagery chemistry: process – composition – or product th – Imaged product

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430 14, 430271, 430523, 430495, G03C 524

Patent

active

044342179

ABSTRACT:
A layer of a chalcogenide glass resist material, on a substrate on which a microlithographic pattern is to be formed, has a deposit of silver halide on its outer surface. By actinic irradiation a latent silver image replicating the desired pattern is formed in the halide deposit. This image is developed to a metallic silver, which is used to photodope the resist material for subsequent etching to produce the microlithographic pattern on the substrate. Positive and negative patterns are possible from the same starting laminate. One form of a microlithograhic pattern is a mask for producing electronic circuits.

REFERENCES:
patent: 3511661 (1970-05-01), Rauner et al.
patent: 3578451 (1971-05-01), Doggett
patent: 3637383 (1972-01-01), Hallman et al.
patent: 4127414 (1978-11-01), Yoshikawa et al.
patent: 4188215 (1980-02-01), Sato et al.
Yoshikawa, et al.: A Novel Inorganic Photoresist Utilizing Ag Photodoping in Se-Ge Glass Films, Applied Physics Letters, vol. 29, No. 10, Nov. 1976, pp. 677-679.

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