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Method for separating a useful layer and component obtained by said method

  • US 7,569,152 B2
  • Filed: 07/01/2004
  • Issued: 08/04/2009
  • Est. Priority Date: 07/04/2003
  • Status: Expired due to Fees
First Claim
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1. Method for separating a useful layer, initially attached by a sacrificial layer to a layer forming a substrate, the method comprising the following steps in order:

  • depositing of a mask on at least a predetermined part of the useful layer;

    doping through the mask of at least a part of the surface of at least one of the layers in contact with the sacrificial layer, so as to delineate at least one doped zone and at least one non-doped zone of said part of the surface;

    at least partial etching of the sacrificial layer; and

    superficial etching of said part of the surface so as to increase the roughness of the doped zone of said part of the surface,one of said zones forming a stop after the superficial etching.

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