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Mis semiconductor device and method of fabricating the same

  • US 5,523,257 A
  • Filed: 01/18/1994
  • Issued: 06/04/1996
  • Est. Priority Date: 01/18/1993
  • Status: Expired due to Term
First Claim
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1. A method of fabricating a MIS semiconductor device comprising the steps of:

  • forming a mask on a semiconductor;

    forming impurity regions by introducing impurities selectively into a the semiconductor using said mask;

    removing said mask;

    increasing the crystallinity of at least said impurity regions by irradiating said semiconductor with light after the removing of said mask; and

    forming a gate electrode on a portion of said semiconductor located between said impurity regions with an insulating film between said portion and said gate electrode after said increasing step,wherein said mask has a width wider than said gate electrode in a direction from one of said impurity regions to the other one of said impurity regions.

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