Patent ID: 6346455
Filing Date: 2002-02-12
Classification: H01L

Abstract:
A method of forming a corrugated capacitor structure for enhanced capacitance on a substrate, comprising: providing at least one electrical contact on said substrate; forming a first layer of doped silicate glass having a first composition over at least aportion of said electrical contact; forming a second layer of doped silicate glass having a second composition different than the first composition of said first layer of doped silicate glass over at least a portion of said first layer of doped silicate glass; forming an etch-resistant layer over at least a portion of said second layer of doped silicate glass; and etching said first layer of doped silicate glass and said second layer of doped silicate glass to form a contact opening having a side wall in said first layer of doped silicate glass and said second layer of doped silicate glass, the side wall of the contact opening having a corrugated surface.