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. 17, 2010
Filed:
Oct. 04, 2007
Shuntaro Machida, Kokubunji, JP;
Hiroyuki Enomoto, Musashino, JP;
Shuntaro Machida, Kokubunji, JP;
Hiroyuki Enomoto, Musashino, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A technology capable of improving receiver sensitivity and improving insulation withstand voltage in an ultrasonic transducer is provided. An ultrasonic transducer comprises: a lower electrode; an insulator covering the lower electrode; a cavity portion disposed on the insulator so as to overlap with the lower electrode; and an upper electrode disposed so as to overlap with the cavity portion. In this ultrasonic transducer, an insulator is inserted between the upper and lower electrodes in a part not having the cavity portion. By this means, sum total of thickness of insulators between the upper and lower electrodes in a part not having the cavity portion is larger than sum total of thickness of insulators between the upper and lower electrodes in a part having the cavity portion.