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:
Sep. 23, 2008
Filed:
Dec. 20, 2007
Kunihiko Yoshioka, Nagoya, JP;
Takao Ohnishi, Nagoya, JP;
Tomohiro Yamada, Komaki, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A lower electrodeand an auxiliary electrode, a piezoelectric/electrostrictive film, and an upper electrodeare sequentially arranged in layers on a substrate. The lower electrodeis continuously formed in a region ranging from a first portion of the thick-walled portionto a thin-walled diaphragm portion. The auxiliary electrodeis continuously formed in a region ranging from a second portion of the thick-walled portionopposite the first portion to a position on the thin-walled diaphragm portion, the position being separated from the lower electrode. The upper electrodeis formed in such a manner as to overlie the piezoelectric/electrostrictive filmand the auxiliary electrode. Furthermore, a connection electrodeis provided for electrically connecting the upper electrodeand the auxiliary electrode. Thus, a plurality of paths are provided for electrically connecting the upper electrodeand the auxiliary electrode. Therefore, even when connection through a certain path is cut off due to fracture of a portion of the upper electrodecaused by deterioration in insulating performance of the piezoelectric/electrostrictive film, electrical connection between the upper electrodeand the auxiliary electrodecan be maintained through the remaining path(s).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile