Patent ID: 9330936
Filing Date: 2016-05-03
CPC Classification: H01L

Claim Text:
1. A method for forming a semiconductor device, the method comprising: providing a substrate having a germanium (Ge)-containing film thereon, wherein the substrate includes a Si fin and the Ge-containing film is formed on surfaces of the Si fin; identifying a first plasma processing recipe that uses a metal chloride precursor to deposit a first metal layer on the Ge-containing film at a higher rate than the Ge-containing film is etched by the metal chloride precursor; identifying a second plasma processing recipe that uses the metal chloride precursor to etch the Ge-containing film at a higher rate than a second metal layer is deposited on the Ge-containing film by the metal chloride precursor; performing the first plasma processing recipe to deposit the first metal layer on the Ge-containing film; and performing the second plasma processing recipe to deposit the second metal layer on the first metal layer, wherein the second metal layer is deposited at a higher rate than the first metal layer.