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Method for fabricating micromachined structures

  • US 7,785,481 B2
  • Filed: 11/21/2007
  • Issued: 08/31/2010
  • Est. Priority Date: 10/05/2007
  • Status: Expired due to Fees
First Claim
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1. A method for fabricating a micromachined structure, comprising the steps of:

  • providing a substrate;

    forming at least one cavity on the substrate;

    filling the at least one cavity with a dielectric material different from the material of the substrate;

    forming a circuitry layer above the at least one cavity filled with the dielectric material, wherein the circuitry layer comprises a first etch-resistant layer and a dielectric layer;

    etching the circuitry layer so that the portion of the dielectric layer exposed by the first etch-resistant layer is removed; and

    removing the dielectric material in the at least one cavity by etching.

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