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:
Jan. 20, 1987
Filed:
Jun. 14, 1985
Applicant:
Inventors:
Tsutomu Tsunooka, Kariya, JP;
Tadashi Takeuchi, Nagoya, JP;
Kunihiro Ushida, Aichi, JP;
Shogo Kawajiri, Nagoya, JP;
Assignee:
NGK Spark Plug Co., Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
3103 / ; 310325 ; 310359 ; 310365 ;
Abstract
Sheet-like piezoelectric element in which a plurality of slits are formed between the comb-shaped electrodes alternately projected in a zigzag shape from a pair of terminals arranged oppositely, a piezoelectric layer of composite piezoelectric material is filled into the slits, a DC voltage is applied between the terminals to polarize the adjacent layers in reverse directions to each other, and the electrodes have a thickness corresponding to that of the piezoelectric layer. The element may be used for an electro-mechanical transducer or a thermal-electric transducer.