Patent · US Expired

Composition for oxide CMP

US5759917A · kind A · utility

144Cited by
11References
35Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 30, 1996
Grant dateJun 2, 1998
Priority date
Expiry dateDec 30, 2016

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH01L21/31053
  • WIPO fieldBasic materials chemistry
  • WIPO sectorChemistry

Abstract

A chemical mechanical polishing composition comprising carboxylic acid, a salt and a soluble cerium compound at a pH above 3 and a method to selectively polish a silicon oxide overfill in preference to a silicon nitride film layer in a single step during the manufacture of integrated circuits and semiconductors.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.