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Spacer linewidth control

  • US 8,232,215 B2
  • Filed: 11/20/2009
  • Issued: 07/31/2012
  • Est. Priority Date: 04/08/2009
  • Status: Active Grant
First Claim
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1. A method for fabricating a microelectronic structure comprising:

  • forming upon a substrate that includes a plurality of evenly spaced topographic features a conformal spacer material layer;

    forming upon the conformal spacer material layer a conformal resist layer;

    differentially exposing and developing the conformal resist layer over different topographic features to leave remaining a differential thickness resist residue layer upon the conformal spacer material layer over the different topographic features; and

    sequentially etching the differential thickness resist residue layer and the conformal spacer material layer to provide different width spacers in direct contact with sidewalls of the different topographic features.

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  • 6 Assignments
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