Piezoelectric crystalline film of zinc oxide and method for maki

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204192SP, 252 629, 427100, 428432, 428469, 428492, 428539, C23C 1300, C04B 3500

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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.

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