Patent · US Active

Structure and method to improve FAV RIE process margin and electromigration

US10957584B2 · kind B2 · utility

1Cited by
3References
5Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 22, 2017
Grant dateMar 23, 2021
Priority date
Expiry dateDec 22, 2037

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH01L21/76883
  • WIPO fieldSemiconductors
  • WIPO sectorElectrical engineering

Abstract

A method of forming fully aligned vias in a semiconductor device, the method including forming a first level interconnect line embedded in a first interlevel dielectric (ILD), selectively depositing a dielectric on the first interlevel dielectric, laterally etching the selectively deposited dielectric, depositing a dielectric cap layer and a second level interlevel dielectric on top of the first interlevel dielectric, and forming a via opening.

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