The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 1977
Filed:
Mar. 23, 1976
Applicant:
Inventor:
Tomosaburo Kitamura, Kawasaki, JA;
Assignee:
Sony Corporation, Tokyo, JA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; C04B / ; C04B / ;
U.S. Cl.
CPC ...
428218 ; 106 733 ; 252 629 ; 428325 ; 428539 ;
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.