Etchants for glass films on metal substrates

Details Etchants for glass films on metal substrates Etchants for glass films on metal substrates

1976-11-10

1977-08-09

Van Horn, Charles E.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

65 31, 134 3, 156657, 156663, 252 793, 252 794, H01L 21312

Patent

active

040408973

ABSTRACT:
An aqueous solution for etching a glass layer on a metal (aluminum) substrate without substantial attack on the metal. The solution comprises buffered hydrofluoric acid, sodium chloride, and either (a) a fluorocarbon surfactant capable of forming a protective thin film upon the aluminum, or (b) a 6-hydroxy alcohol (e.g., mannitol or sorbitol).

REFERENCES:
patent: 3616098 (1971-10-01), Falls
patent: 3642549 (1972-02-01), Couture et al.
patent: 3715250 (1973-02-01), Altman et al.

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