| 摘要 |
PCT No. PCT/GB96/02774 Sec. 371 Date Aug. 24, 1998 Sec. 102(e) Date Aug. 24, 1998 PCT Filed Nov. 11, 1996 PCT Pub. No. WO97/18574 PCT Pub. Date May 22, 1997An electrical switch has an evacuated housing with input and output terminals each connected to a respective group of metal tracks extending parallel and insulated from one another. A second silicon plate is cut to form several bridging elements, each having a metal layer on its upper and lower surface. Each bridging element extends transversely above tracks connected to different ones of the terminals. The housing is closed by a silicon cap having actuating tracks extending above the bridging elements, which form an electrostatic actuator with the metal layer on the upper surface of the bridging elements. When a voltage is applied to the electrostatic actuator, the bridging elements are driven down so that they contact tracks connected to different ones of the terminals and allow current to flow between them.
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