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:
Aug. 11, 1992
Filed:
Dec. 27, 1989
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310312 ; 310344 ;
Abstract
A piezoelectric transducer arranged to allow the adjustment of its oscillation frequency. The piezoelectric transducer comprises a piezoelectric member which is encased in an airtight housing having at least one portion which allows transmission of light. The piezoelectric member has on its surfaces electrodes and is coupled to one end portions of electrical conductors the other end portions of which extend toward the external of said airtight housing. Also housed in the airtight housing is a deposition member which is evaporated in response to illumination of a light beam. The deposition member is provided so as to face the light-transmitting portion of the airtight housing.