Method of forming titanium film by CVD

Details Method of forming titanium film by CVD Method of forming titanium film by CVD

2005-01-05

2009-02-03

Olsen, Allan (Department: 1792)

Cleaning and liquid contact with solids

Processes

Including application of electrical radiant or wave energy...

Reexamination Certificate

active

07484513

ABSTRACT:
A Ti film is formed by CVD in holes formed in an insulating film formed on a Si substrate or on a Si film formed on a Si substrate by a method according to the present invenitioin. The method includes the steps of loading a Si substrate into a film forming chamber; evacuating the chamber at a predetermined vacuum; supplying TiCl4gas, H2gas, Ar gas and SiH4gas into the film forming chamber; and producing a plasma in the film forming chamber to deposit a Ti film in the holes formed in the insulating film. The Si substrate is heated at 500° C. or below during the deposition of the Ti film. The flow rate of the SiH4gas is from 30 to 70% of the flow rate of the TiCl4gas. This method enables formation of a Ti film on a Si base at positions of holes in an insulating layer, with a good morphology of the interface between the Si base and the Ti film and with a good step coverage.

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