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. 20, 2013
Filed:
Sep. 13, 2012
Kazuya Matsumoto, Nagano, JP;
Katsuhiro Wakabayashi, Hachioji, JP;
Jin Hiraoka, Sagamihara, JP;
Kazuhisa Karaki, Shiojiri, JP;
Mamoru Hasegawa, Nagano, JP;
Satoshi Yoshida, Hachioji, JP;
Kazuya Matsumoto, Nagano, JP;
Katsuhiro Wakabayashi, Hachioji, JP;
Jin Hiraoka, Sagamihara, JP;
Kazuhisa Karaki, Shiojiri, JP;
Mamoru Hasegawa, Nagano, JP;
Satoshi Yoshida, Hachioji, JP;
Olympus Medical Systems Corp., Tokyo, JP;
Olympus Corporation, Tokyo, JP;
Abstract
An ultrasound transducer includes a substrate and a lower electrode layer, a lower insulating layer, an upper insulating layer, and an upper electrode layer. The lower insulating layer and the upper insulating layer are arranged to be opposed to each other via an air gap section. The upper insulating layer and the lower insulating layer are different in a material and thickness and satisfy Equation 1 below. In Equation 1, Krepresents a relative dielectric constant of the lower insulating layer, Krepresents a relative dielectric constant of the upper insulating layer, Trepresents thickness of the lower insulating layer, Trepresents thickness of the upper insulating layer, ρ(x) represents a charge density distribution in the lower insulating layer, and ρ(y) represents a charge density distribution in the upper insulating layer.