Patents Represented by Law Firm Killworth, Gottman, Hogan & Schaeff, L.L.P.
  • Patent number: 6143649
    Abstract: The present invention is directed to a method for forming semiconductor devices and semiconductor device precursors having gradual slope contacts. The method for forming a semiconductor precursor includes the steps of: forming a layer of conductive material in a first layer; forming a layer of a hard mask material onto at least a portion of the first layer; etching the layer of hard mask material to expose a portion of the first layer; forming facets on the layer of hard mask material; and forming a via in the first layer such that the via extends through the first layer to expose at least a portion of the layer of conductive material.
    Type: Grant
    Filed: February 5, 1998
    Date of Patent: November 7, 2000
    Assignee: Micron Technology, Inc.
    Inventor: Sanh Dang Tang