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COMPOSITE SUBSTRATE AND METHOD FOR MANUFACTURING THE COMPOSITE SUBSTRATE

  • US 20120161585A1
  • Filed: 12/20/2011
  • Published: 06/28/2012
  • Est. Priority Date: 12/22/2010
  • Status: Active Grant
First Claim
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1. A composite substrate comprising:

  • a piezoelectric substrate;

    a support substrate; and

    an adhesive layer with which the piezoelectric substrate and the support substrate are bonded to each other,wherein the adhesive layer includes a flat portion and a swelling portion formed in an outer peripheral area of the flat portion, andthe piezoelectric substrate includes a first surface that is bonded to the flat portion of the adhesive layer and a second surface at the side opposite to the front surface, and is bonded to the support substrate in an area excluding the swelling portion.

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