Patent ID: 6218275
Filing Date: 2001-04-17
Classification: H01L

Abstract:
A process for forming a contact structure of a semiconductor device comprising steps of:(a) providing a substrate having a plurality of gates thereon and a first oxide layer formed between said gates;(b) forming a first dielectric layer on said first oxide layer and said gates;(c) forming a second oxide layer on said first dielectric layer;(d) removing a portion of said second oxide layer for forming first spacers alongside each of said gate;(e) removing a portion of said first dielectric layer by using said first spacers as a mask for forming second spacers alongside each of said gates, wherein said second spacers protrude outwardly from said gates;(f) removing said first spacers and said first oxide layer to expose a portion of said substrate by using an acid solution after said second spacers are formed;(g) forming a second dielectric layer over said exposed portion of said substrate, said second spacers, and said gates;(h) forming a third dielectric layer over said second dielectric layer; and(i) executing a photolithographic and etching process on said third dielectric layer and said second dielectric layer to form said contact structure between said gates on said substrate.