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Method and apparatus to scribe thin film layers of cadmium telluride solar cells

  • US 8,890,025 B2
  • Filed: 04/01/2011
  • Issued: 11/18/2014
  • Est. Priority Date: 09/24/2009
  • Status: Expired due to Fees
First Claim
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1. A method of removing at least a portion of a thin film structure, the thin film structure including at least a first layer and a second layer in contact with the first layer, the method comprising:

  • providing a laser pulse characterized by a temporal pulse shape having a first peak power level during a first portion and a subsequent second peak power level during a second portion;

    directing the laser pulse to impinge on the thin film structure;

    initiating a removal process in the first layer by initiating a dissociation reaction in the first layer during the first portion;

    maintaining the dissociation reaction in the first layer during the second portion; and

    terminating the removal process at the end of the second portion.

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