Image developing method utilizing sodium sulfide and ammonium po

Details Image developing method utilizing sodium sulfide and ammonium po Image developing method utilizing sodium sulfide and ammonium po

1991-08-03

1993-06-01

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Readily visible image formation

430 30, 430145, 430277, 430292, 430294, 430325, 430326, 430331, G03F 730, G03F 732

Patent

active

052158659

ABSTRACT:
An image development method is disclosed. In the method, a photoresist layer on a metal surface is exposed for development. The developer then used is a solution which will both develop the photoresist image and cause any exposed metal surface to change to a predetermined color. The development process then proceeds until the predetermined color is exposed whereupon the process ceases. The preferred metal is copper and the preferred developer is an aqueous solution of sodium sulphide and ammonium polysulfide.

REFERENCES:
patent: 3998601 (1976-12-01), Yates et al.
patent: 4297435 (1981-10-01), Jolly et al.
patent: 4777111 (1988-10-01), Blumel et al.

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