Patent ID: 6214734
Filing Date: 2001-04-10
Classification: B24B,H01L,Y10S,Y10T

Abstract:
A method for improving chemical mechanical polishing endpoint detection during planarization of a semiconductor wafer, said method comprising the step of:(a) depositing a reflectance stop layer above a component disposed on a semiconductor wafer;(b) patterning said reflectance stop layer above said component disposed on said semiconductor wafer;(c) depositing a dielectric layer over said reflectance stop layer and said component;(d) removing material from said dielectric layer disposed above said semiconductor wafer using a chemical mechanical polishing process;(e) determining the thickness of said dielectric layer disposed above said semiconductor wafer using a reflected signal of light, wherein said reflectance stop layer substantially reduces any light from reflecting off of said component; and(f) in response to said dielectric layer substantially achieving a desired thickness, stopping said chemical mechanical polishing process of said semiconductor wafer.