Patent · US Expired

Etch stop layer using polymers for integrated circuits

US5395796A · kind A · utility

11Cited by
7References
19Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJan 11, 1993
Grant dateMar 7, 1995
Priority date
Expiry dateJan 11, 2013

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10T428/31663
  • WIPO fieldSemiconductors
  • WIPO sectorElectrical engineering

Abstract

An etch stop layer (22) for permitting distinguishing between two similar layers (20, 24), such as two oxide layers, during etching is provided. The etch stop layer comprises a silicon-oxyhalide polymer, preferably a silicon-oxyfluoride polymer. Use of the polymer as an etch stop layer permits closer placement of metal conductor surfaces (12, 12') and contacts (14').

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