Patent ID: 6399437
Filing Date: 2002-06-04
Classification: H01L

Abstract:
A method of forming a capacitor comprising the steps of:providing a substrate, depositing a first insulating layer on said substrate, depositing a first polysilicon layer as a pad layer for increasing a capacitance of said capacitor on said first insulating layer, said pad layer having a thickness of at least 1000 Ã¥, forming a cell contact for said capacitor in said first insulating layer and said first polysilicon pad layer exposing the substrate, depositing a second polysilicon layer on said first polysilicon layer and said cell contact, depositing a third polysilicon layer of rugged polysilicon over said second polysilicon layer, depositing a second insulating layer on said third polysilicon layer, and depositing a fourth polysilicon layer on said second insulating layer.