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:
Oct. 20, 1998
Filed:
Jul. 17, 1996
Applicant:
Inventor:
Yasuhiro Tanaka, Matsumoto, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
174 524 ; 361728 ; 310348 ;
Abstract
The invention provides an electronic part which includes a casing having a recessed portion which is free of accumulation of moisture and gases and in which a piezoelectric element and terminals are received, and a lid sealably covering the recessed portion. The casing and the lid are respectively provided with narrow grooves communicating with the recessed portion. The casing and the lid are welded together by a ultrasonic welding method at their peripheral edges with the exception of the narrow grooves and portions outside thereof, thereby forming a very narrow gap between the casing and the lid.