Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1976-08-30
1977-08-02
Van Horn, Charles E.
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
156655, 252 795, B29C 1708
Patent
active
040393712
ABSTRACT:
A composition for etching polyimide based polymers comprised of a tetraalkyl ammonium hydroxide and an organic acid selected from the group of acetic acid, tartaric acid and oxalic acid.
The etchant may be used to texture polyimide films or form perforations through polyimide substrates or layers, particularly in the fabrication of printed circuits and semiconductor devices where via holes are required for interconnection of circuitry.
REFERENCES:
patent: 2374213 (1945-04-01), Katzman
patent: 3702285 (1972-11-01), Knorre et al.
patent: 3770528 (1973-11-01), Hermes
patent: 3773463 (1973-11-01), Cohen et al.
patent: 3775316 (1973-11-01), Berg et al.
patent: 3871730 (1975-03-01), Fish
patent: 3958059 (1976-05-01), Diehl
Brunner Friedrich
Frasch Peter
Schwerdt Friedrich
International Business Machines - Corporation
Massie Jerome W.
Powers Henry
Van Horn Charles E.
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