发明名称 |
THERMOSTABLE ELECTRET CONDENSER MICROPHONE |
摘要 |
The outer face of a case which accommodates a whole microphone is coated by a material having a heat conductivity which is lower than that of a metal, and a material transforming temperature which is higher than the charge dissipating temperature of a dielectric layer for forming an internal electret, and which is higher than 260°C, so that the internal temperature rise can be mitigated by the thermal resistance and the thermal capacity of the whole interior. When a microphone is attached to an application equipment, particularly, the microphone may be passed through a reflow solder bath for a short time period. A heat-resistant structure which can prevent the function from being impaired by a high temperature in the period is provided.
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申请公布号 |
EP1775992(A1) |
申请公布日期 |
2007.04.18 |
申请号 |
EP20050768599 |
申请日期 |
2005.08.04 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
MAKIHATA, KATSUHIRO;OGURA, HIROSHI;YASUNO, YOSHINOBU |
分类号 |
H04R19/01;B81B7/00;B81C1/00;H04R19/04 |
主分类号 |
H04R19/01 |
代理机构 |
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主权项 |
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地址 |
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