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:
May. 29, 2007
Filed:
May. 24, 2005
Applicants:
Kinya Matsuzawa, Nagano, JP;
Mutsuto Tezuka, Nagano, JP;
Inventors:
Kinya Matsuzawa, Nagano, JP;
Mutsuto Tezuka, Nagano, JP;
Assignee:
Seiko Epson Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02N 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to an ultrasonic transducer that has a diaphragm in which an electrode layer is formed thereon. A fixed electrode having a plurality of asperities on the surface facing the diaphragm is provided. An alternating current signal is applied between the electrode layer formed on the diaphragm and the fixed electrode to generate ultrasonic waves. A groove is formed on the upper surface of the projections of the asperities of the fixed electrode to prevent the diaphragm from sticking to the fixed electrode.