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Process and structure for high temperature selective fusion bonding

  • US 9,006,844 B2
  • Filed: 01/26/2011
  • Issued: 04/14/2015
  • Est. Priority Date: 01/28/2010
  • Status: Active Grant
First Claim
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1. A method of selectively preparing a silicon surface for selective fusion bonding, comprising:

  • a) aligning a silicon surface and a shadow mask so as to create a masked area and an unmasked area of the silicon surface;

    b) treating the unmasked area of the silicon surface to prevent fusion bonding, including depositing a layer of silicon nitride on the unmasked area of the silicon surface, wherein the silicon nitride is initially applied at a first deposition rate, and subsequently applied at a second deposition rate greater than the first deposition rate; and

    c) removing the shadow mask from the silicon surface after the treatment in step b).

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