Title:
Electric capacity type transducer
Document Type and Number:
Japanese Patent JP5986441
Kind Code:
B2
Abstract:
Provided is a capacitive transducer having broadband frequency characteristics. The capacitive transducer includes an element which has multiple kinds of cells, each cell including: a first electrode; a vibrating film including a second electrode, the second electrode being opposed to the first electrode with a gap therebetween; and a support portion that supports the vibrating film so as to form the gap. The multiple kinds of cells have different ratios of an area of one of the first electrode and the second electrode to an area of the gap when viewed from a normal direction of the vibrating film. The first electrodes or the second electrodes in the multiple kinds of cells are electrically connected together.
Inventors:
Takahiro Akiyama
Kazutoshi Torashima
Kazutoshi Torashima
Application Number:
JP2012151939A
Publication Date:
September 06, 2016
Filing Date:
July 06, 2012
Export Citation:
Assignee:
Canon Inc
International Classes:
H04R19/00; A61B8/00; H04R31/00
Domestic Patent References:
| JP2008259158A | ||||
| JP2011155345A |
Foreign References:
| US20070059858 |
Attorney, Agent or Firm:
Kazuo Kato
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