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US 4,233,530 AGranted
Elastic surface wave device
AssigneeClarion Co., Ltd.
InventorsNobuo Mikoshiba, Shoichi Minagawa
Life of this patent
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Abstract
An elastic surface wave device, especially amplifier which includes input and output means for electrical signals provided so as to be spaced on a surface of a piezoelectric material which composes a laminate in combination with a semiconductor, and an electrode provided in a surface signal wave propagation path between said input and output means for application of a d.c. bias voltage and supply of a pumping power.
Claims4
An elastic surface wave device, comprising:
- a laminate composed of a semiconductor layer, a piezoelectric material layer, and a protective film layer interposed therebetween;
- a first electrode on a surface of said piezoelectric material layer;
- a d.c. bias voltage source connected to said first electrode;
- a pumping power source connected to said first electrode;
- and a second electrode on a surface of said semiconductor layer for ohmic contact therewith.
2 more elements
Dependencies are inferred from the claim text.