Patent ID: 8218122
Filing Date: 2012-07-10
Classification: H01L,H05K

Abstract:
1. A wiring film forming method for forming a wiring film on a surface of an object to be film formed of which silicon or silicon dioxide is exposed, the wiring film forming method comprising the steps of: introducing oxygen gas and a sputtering gas into a vacuum ambience in which the object to be film formed is disposed, wherein the oxygen gas is introduced such that a ratio of the partial pressure of the oxygen gas to the partial pressure of the sputtering gas in the vacuum ambience is at least 0.1% and at most 20.0%; sputtering a first sputtering target in the vacuum ambience containing said introduced oxygen gas, the first sputtering target including copper as a major component and at least one kind of additive elements selected from an additive element group consisting of Mg, Al, Si, Be, Ca, Sr, Ba, Ra, Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb and Dy; forming a first metallic film on a surface of the object to be film formed; sputtering a second sputtering target comprising copper as a major component in a state in which the introduction of the oxygen gas into a vacuum ambience is stopped where the object to be film formed is disposed in the vacuum ambience; forming a second metallic film on a surface of the first metallic film; and etching the first and second metallic films, and thereby forming the wiring film.