Patent ID: 6150216
Filing Date: 2000-11-21
Classification: H01L

Abstract:
A method for forming an electrode of a semiconductor device capacitor, said method comprising:forming a dielectric layer on a substrate;forming a first photoresist layer on said dielectric layer, wherein said first photoresist layer defining trench area over a portion of said substrate;removing portions of said dielectric layer to form said trench, said portions of said dielectric layer being left uncovered by said first photoresist layer;removing said first photoresist layer;forming a polysilicon layer over said dielectric layer, wherein said polysilicon layer filling said trench;forming a second photoresist layer on said polysilicon layer, wherein said second photoresist layer defining a capacitor area over a portion of said polysilicon layer, said capacitor area covering said trench;removing portions of said polysilicon layer, said portions of said polysilicon layer being left uncovered by said second photoresist layer, and residual said polysilicon layer forming a polysilicon rod;removing said second photoresist layer;forming an amorphized silicon spacer in sidewall of said polysilicon rod;implanting said polysilicon rod to form an amorphized polysilicon layer on top surface of said polysilicon rod; andforming hemi-spherical grained silicon on surface of said polysilicon rod, thereby forming an electrode of said capacitor of a semiconductor capacitor.