发明名称 |
Semiconductor electret capacitor microphone |
摘要 |
A semiconductor electret capacitor microphone includes a vibration membrane, a semiconductor chip on which are formed a necessary electronic circuit, a fixed electrode, a spacer for preserving a predetermined space between the fixed electrode and the vibration membrane, and a case for enclosing the semiconductor chip and the vibration membrane in such a configuration that the fixed electrode is connected to the ground and the vibration membrane is connected to an input electrode of the semiconductor chip.
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申请公布号 |
US6870938(B2) |
申请公布日期 |
2005.03.22 |
申请号 |
US20010926429 |
申请日期 |
2001.10.31 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA;HOSIDEN CORPORATION |
发明人 |
TAKEUCHI TAKANOBU;OHBAYASHI YOSHIAKI;YASUDA MAMORU;SAEKI SHINICHI |
分类号 |
H04R1/04;H04R1/06;H04R3/00;H04R19/00;H04R19/01;(IPC1-7):H04R25/00 |
主分类号 |
H04R1/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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