Patent · US Active

Capping layer for reduced outgassing

US8466073B2 · kind B2 · utility

140Cited by
163References
19Claims
0Family size

Assignee

Inventors

Key dates

Filing dateApr 17, 2012
Grant dateJun 18, 2013
Priority date
Expiry dateApr 17, 2032

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH01L21/02326
  • WIPO fieldSemiconductors
  • WIPO sectorElectrical engineering

Abstract

A method of forming a silicon oxide layer is described. The method first deposits a silicon-nitrogen-and-hydrogen-containing (polysilazane) film by radical-component chemical vapor deposition (CVD). The silicon-nitrogen-and-hydrogen-containing film is formed by combining a radical precursor (excited in a remote plasma) with an unexcited carbon-free silicon precursor. A capping layer is formed over the silicon-nitrogen-and-hydrogen-containing film to avoid time-evolution of underlying film properties prior to conversion into silicon oxide. The capping layer is formed by combining a radical oxygen precursor (excited in a remote plasma) with an unexcited silicon-and-carbon-containing-precursor. The films are converted to silicon oxide by exposure to oxygen-containing environments. The two films may be deposited within the same substrate processing chamber and may be deposited without breaking vacuum.

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