Patent ID: 6660611
Filing Date: 2003-12-09
Classification: H01L

Abstract:
A method of forming a corrugated capacitor structure for enhanced capacitance on a substrate having a contact, comprising:forming a first layer of doped silicate glass having a first composition over at least a portion of said contact; forming a second layer of doped silicate glass having a second composition different than said first composition of said first layer of doped silicate glass over at least a portion of said first layer of doped silicate glass, said second layer of doped silicate glass including germanium boro-phospho 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, said side wall of said contact opening having a corrugated surface.