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Gate critical dimension variation by use of ghost features

  • US 7,569,309 B2
  • Filed: 11/09/2005
  • Issued: 08/04/2009
  • Est. Priority Date: 11/09/2005
  • Status: Active Grant
First Claim
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1. A computer readable medium containing program code that configures a processor to perform a method of making masks for forming an array of features on a semiconductor device, comprising:

  • program code for forming a first mask feature on a first mask to provide a first feature in the array of features on the semiconductor device and a second mask feature on the first mask adjacent to, and spaced from, the first mask feature to provide a second feature adjacent to, and spaced from, the first feature in the array of features on the semiconductor device; and

    program code for forming a second mask to be used in conjunction with the first mask, the second mask comprising,a first region that blocks radiation and that corresponds to the first mask feature and the first feature in the array of features on the semiconductor device, anda second region that permits radiation to impinge on an entirety of the second feature in the array of features on the semiconductor device.

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