Chemistry: electrical and wave energy – Processes and products – Vacuum arc discharge coating
Patent
1983-09-29
1984-08-21
Demers, Arthur P.
Chemistry: electrical and wave energy
Processes and products
Vacuum arc discharge coating
204192R, 204192E, 156625, C23C 1500
Patent
active
044668740
ABSTRACT:
The invention deals with a method of electroding a poly(vinylidene fluoride) solid in a piezoelectric application. The electroding method entails surface preparation of the poly(vinylidene fluoride) by a variety of steps including plasma etching to create temporary molecular scale surface irregularities followed by sputtering a metallic layer before deterioration of the plasma etched surface. The chromium may be the initial metal sputtered, followed by a sputtered copper layer, followed in turn by at least one heavier electrodeposited conductive layer. The method may be conducted without deterioration of the piezoelectric properties of the material. The method has been found to provide very good adhesion between the electrode and the PVF.sub.2 surface.
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patent: 4342632 (1982-08-01), Heim
patent: 4364792 (1982-12-01), Gliem et al.
Lovinger, A. J., "Ferroelectric Polymers", Science vol. 220, No. 4602, Jun. 10, 1983 p. 1115-1121.
Shaw, H. J. et al, Stanford University, "PVF.sub.2 Transducers" 1980 Ultrasonics Symposium, IEEE, pp. 927-940.
Roberts, A. L., Research News "Flexible PVF.sub.2 Film: An Exceptional Polymer for Transducers", Science, vol. 200, Jun. 23, 1978, pp. 1371-1374.
Bassett, D. C., "Poly(Vinylidene Fluoride)" Developments in crystalline polymers-1, pp. 201-215-Applied Science Publishers.
Belke, Jr. Robert E.
Hill Richard J.
Shirk Raymond A.
Smith David P.
Baker Carl W.
Demers Arthur P.
General Electric Company
Lang Richard V.
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