Patent · US Expired

Selectively etching silicon using fluorine without plasma

US6500356B2 · kind B2 · utility

34Cited by
19References
10Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMar 27, 2000
Grant dateDec 31, 2002
Priority date
Expiry dateMar 27, 2020

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH01L21/32135
  • WIPO fieldSemiconductors
  • WIPO sectorElectrical engineering

Abstract

A process for selectively etching silicon from a workpiece without etching silicon oxide or silicon nitride. The principal etchant gas is molecular fluorine gas (F2) that is not excited to a plasma state.

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