Patent ID: 6303484
Filing Date: 2001-10-16
Classification: H01L,Y10S

Abstract:
A method for fabricating a dummy pattern, comprising:providing a substrate having a dense region and a sparse region;forming a plurality of conducting patterns having sidewalls on the dense region;forming a dielectric layer over the dense region, and the conducting patterns and the sparse region;forming a plurality of photoresist patterns on the dielectric layer above the sparse region;etching back the dielectric layer to form spacers on the sidewalls of the conducting patterns, and simultaneously forming a plurality of dummy patterns on the sparse region while using the photoresist patterns as a mask;removing the photoresist patterns;forming an inter-layer dielectric layer on the conducting patterns and the dummy patterns; andplanarizing the inter-layer dielectric layer by performing a chemical mechanical polishing (CMP) process to the inter-layer dielectric layer.