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. 26, 2014
Filed:
Jan. 20, 2010
Takeshi Inoda, Daito, JP;
Ryusuke Horibe, Daito, JP;
Fuminori Tanaka, Daito, JP;
Tomio Ishida, Daito, JP;
Takeshi Inoda, Daito, JP;
Ryusuke Horibe, Daito, JP;
Fuminori Tanaka, Daito, JP;
Tomio Ishida, Daito, JP;
Funai Electric Co., Ltd., Osaka, JP;
Abstract
Disclosed is a microphone unit comprising a film substrate (), electrically conductive layers () which are formed on both substrate surfaces of the film substrate (), and an electrical acoustic transducer unit () which is provided on the film substrate () and comprises a diaphragm capable of converting a sound pressure to an electrical signal. In the microphone unit, the linear expansion coefficient of the film substrate (), including the electrically conductive layers (), falls within the range of 0.8 to 2.5 times, inclusive, the linear expansion coefficient of the diaphragm.