Glass etching composition

Details Glass etching composition Glass etching composition

1992-10-30

1994-01-25

Thomas, Tom

Compositions

Etching or brightening compositions

252 793, 252 794, 156663, 156637, 65 31, H01L 2100

Patent

active

052813509

ABSTRACT:
The present invention provides an improved glass etching composition which does not contain any causative materials such as hydrofluoric acid, causing environmental pollution. The etching composition comprises a first solution of a flow modifier and ammonium bifluoride in purified glycerine; and a second solution of ammonium bifluoride and ferric chloride in purified glycerine.

REFERENCES:
patent: 3374141 (1968-03-01), Junge et al.
patent: 3551228 (1970-12-01), Meth et al.
patent: 3616098 (1971-10-01), Falls
patent: 3642549 (1972-02-01), Couture et al.
patent: 3769113 (1973-10-01), Gruenke, Jr.
patent: 4781792 (1988-11-01), Hogan
patent: 4921626 (1990-05-01), Rhodenbough

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