Patent ID: 7141488

Claim:
A method of depositing a film containing germanium on a substrate comprising the steps of: a) conveying two or more germanium compounds in a gaseous phase to a deposition chamber containing the substrate, wherein a first germanium compound is a halogermanium compound of the formula X 1 4−a GeR a , wherein a=0–3, each X 1 is independently a halogen, and each R is independently chosen from H, alkyl, alkenyl, alkynyl, aryl, and NR 4 R 6 , wherein each R 4 and R 6 are independently chosen from H, alkyl, alkenyl, alkynyl and aryl, and wherein a second germanium compound has the formula wherein each R 1 and R 2 are independently chosen from H, alkyl, alkenyl, alkynyl and aryl; each R 3 is independently chosen from alkyl, alkenyl, alkynyl and aryl; X is halogen; a′=0–3; b′=0–3; c′=0–3; d′=1–4 and a′+b′+c′+d′=4; provided that a′+b′≦3 when X 1 =Cl, R=H, and X=Cl; b) decomposing the two or more germanium compounds in the deposition chamber; and c) depositing the film comprising germanium on the substrate.