Stock material or miscellaneous articles – Composite
Patent
1978-09-07
1980-05-27
Cooper, Jack
Stock material or miscellaneous articles
Composite
204192SP, 252 629, 427100, 428432, 428469, 428492, 428539, C23C 1300, C04B 3500
Patent
active
042051177
ABSTRACT:
Piezoelectric crystalline film on a substrate, which is a crystalline zinc oxide film with a c-axis substantially perpendicular to the substrate surface, the crystalline zinc oxide film containing, as an additive element, phosphorus. The piezoelectric crystalline films have high resistivity and a smooth surface, and make it possible to produce piezoelectric transducers with good conversion efficiency. Such films are made by sputtering zinc oxide and phosphorus onto a substrate from a film material source consisting essentially of a ceramic of zinc oxide containing phosphorus.
REFERENCES:
patent: 3420763 (1969-01-01), Polito et al.
patent: 3573960 (1971-04-01), Duncan
patent: 3766041 (1973-10-01), Wasa et al.
patent: 3988232 (1976-10-01), Wasa et al.
Mashio Tasuku
Nishiyama Hiroshi
Ogawa Toshio
Cooper Jack
Murata Manufacturing Co. Ltd.
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