Patent ID: 6174454
Filing Date: 2001-01-16
Classification: C03C,F28D,F28F,H01L,Y10T

Abstract:
Slurry formulation for CMP comprises:(a) metal oxide which weights 2.0-10% and can be chosen from zirconium oxide, cerium oxide, aluminum oxide, or their combinations;(b) buffer solution which consists of a strong acid and a weak base, where the strong acid can be chosen from nitric acid, hydrochloric acid, sulphuric acid, phosphoric acid, or their combinations; the weak base can be organic ammonium hydroxide with structure formula R.sub.1 R.sub.2 R.sub.3 R.sub.4 NOH where radical R.sub.1 R.sub.2, R.sub.3, and R.sub.4 can be any alkyls with carbon number ranging from 1-8.