Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hiroshi Akino0
Date of Patent
July 6, 2010
0Patent Application Number
112483260
Date Filed
October 13, 2005
0Patent Primary Examiner
Patent abstract
In a condenser microphone having a microphone case formed by a casting, the resistivity of the surface of the microphone case is decreased surely, and the shielding function of the microphone case is made stable. In a condenser microphone in which a substrate including an audio output circuit connected to a condenser microphone unit is housed therein, and a cylindrical microphone case 10 mounted with an output connector is provided on one end side, the microphone case 10 being formed by casting, a conductive layer 10b having a lower resistivity than that of a raw material of the microphone case 10 is formed integrally on a casting surface 10a on the outer surface side of the microphone case 10.
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