| 摘要 |
PCT No. PCT/SE82/00318 Sec. 371 Date May 19, 1983 Sec. 102(e) Date May 19, 1983 PCT Filed Oct. 6, 1982 PCT Pub. No. WO83/01362 PCT Pub. Date Apr. 14, 1983.A lead frame for an electric microphone which includes an H-shaped structure of thin metallic material including spaced parallel legs and a crossbar therebetween. A first plate is spaced from the crossbar and is located between the legs. A lead connects the first plate to the crossbar. A second plate is spaced from the first plate and is connected thereto by a lead. All of the above structure is monolithic and coplanar being formed of a thin metallic material. The second plate is provided with holes and a amplifier chip is mounted on the first plate. Leads are provided connecting the chip with the aforesaid legs. The above structure is entrapped between two case halves and a metallized film is supported between the halves and in spaced parallel relationship with the second plate being supported on distant pieces. A cover encircles the case halves. |
