Technique for fabrication of foil electret

Details Technique for fabrication of foil electret Technique for fabrication of foil electret

1975-03-21

1976-03-23

Mehr, Milton S.

Metal working

Method of mechanical manufacture

Electrical device making

179111E, 17910041B, 156 6, 307 88ET, 427100, 427123, 427124, 427125, 427250, 427299, 427337, 427404, H01S 400

Patent

active

039451127

ABSTRACT:
A technique for the fabrication of thin film electrets designed for use in electroacoustic transducers involves depositing a thin film of aluminum or titanium upon a perfluorinated foil and etching away the film prior to deposition of gold. The resultant structure evidences superior adhesion characteristics and electrical characteristics comparable to those previously described.

REFERENCES:
patent: 3514538 (1970-05-01), Chadwick et al.
patent: 3625758 (1971-12-01), Stahl et al.
patent: 3632443 (1972-01-01), Koofra
patent: 3644605 (1972-02-01), Sessler et al.
patent: 3706131 (1972-12-01), Van Turnhout
patent: 3711941 (1973-01-01), Sessler et al.
patent: 3858307 (1975-01-01), Yoshimura et al.

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