| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve stability of attraction to a fixed electrode while improving low-frequency response of a diaphragm with respect to, especially, an electret capacitor microphone. <P>SOLUTION: A diaphragm 11 for a capacitor microphone is formed of a thermoplastic resin film and includes a metal film on one surface, wherein a first unevenness pattern 12 of long-cycle rough unevenness 12a and a second unevenness pattern 13 of short-cycle fine unevenness 13a are formed over the entire area of the diaphragm 11. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
