Patent ID: 6060367
Filing Date: 2000-05-09
Classification: H01L

Abstract:
A method of forming first electrodes of capacitors on a semiconductor substrate, comprising the steps of:forming a first dielectric layer on the substrate;removing a portion of said first dielectric layer to define contact holes within;forming a first conductive layer within said contact holes and over said first dielectric layer;forming a second dielectric layer over said first conductive layer;removing a portion of said second dielectric layer to define a shape of said first electrodes;forming a second conductive layer over said second dielectric layer and said first conductive layer;forming a first rugged silicon layer over said second conductive layer;forming a third dielectric layer over said first rugged silicon layer;removing a portion of said third dielectric layer, of said first rugged silicon layer, and of said second conductive layer to define a capacitor area;removing said second dielectric layer;forming a second rugged silicon layer over said substrate;removing a portion of said second rugged silicon layer and a portion of said first conductive layer which are located outside said capacitor area; andremoving said third dielectric layer to form said first electrodes.