Patent ID: 7186630

Claim:
A deposition method comprising: providing a substrate disposed within a chamber, the substrate comprising a first surface having an exposed single crystalline surface morphology and a second surface having an exposed second surface morphology different from the single crystalline surface morphology; introducing trisilane to the chamber under chemical vapor deposition conditions comprising a pressure in the range of about 1 Torr to about 350 Torr and a temperature in the range of about 350° C. to about 530° C.; depositing an amorphous Si-containing film onto the substrate over both of the first surface and the second surface, the amorphous Si-containing film having a first thickness T 1 over the first surface and a second thickness T 2 over the second surface such that T 1 :T 2 is in the range of about 1.2:1 to about 1:1.2; and annealing the amorphous Si-containing film to form a crystalline Si-containing film, wherein the crystalline Si-containing film over the first surface is a single crystal and the crystalline Si-containing film over the second surface is polycrystalline.