Integrally sintered ceramic complex and method of manufacturing

Stock material or miscellaneous articles – Structurally defined web or sheet – Including components having same physical characteristic in...

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106 733, 252 629, 428325, 428539, B32B 702, C04B 3500, C04B 3546

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040618161

ABSTRACT:
An integrally sintered ceramic complex which is suitable for use as a substrate of a surface acoustic wave device and can effectively reduce unnecessary ultrasonic waves.
The method of manufacturing the integrally sintered ceramic complex is also disclosed.
The disclosed ceramic complex comprises a first ceramic portion made of densely sintered piezoelectric ceramic material and a second ceramic portion made of porously sintered ceramic material. Both the ceramic portions are sintered integrally, and the second portion surrounds the first portion.
The operating area of the surface acoustic wave device is formed on the surface of the first ceramic portion.

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patent: 3663440 (1972-05-01), Thomann
patent: 3712846 (1973-01-01), Daniels et al.
patent: 3713877 (1973-01-01), Kirchner et al.
patent: 3911188 (1975-10-01), Torti et al.
patent: 3923675 (1975-12-01), Mazdiyashi et al.
patent: 3926702 (1975-12-01), Oki et al.

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