Patent ID: 6716772
Filing Date: 2004-04-06
Classification: C23C,H01L

Abstract:
A semiconductor manufacturing apparatus which forms silicon nitride films on a plurality of substrates by thermal chemical vapor deposition, comprising:a vertical reaction tube having an inner wall; a substrate holder which is to hold said plurality of substrates in said vertical reaction tube with said plurality of substrates being vertically stacked, a distance â€œaâ€  between adjacent substrates of said plurality of substrates and a distance â€œbâ€  between edges of said plurality of substrates and said inner wall of said vertical reaction tube being maintained substantially equal to each other; and gas supplies which supply bis tertiary butyl amino silane and NH3 into said vertical reaction tube such that said bis tertiary butyl amino silane and said NH3 flow vertically from one end of said plurality of substrates to an opposing end of said plurality of substrates and do not flow into said vertical reaction tube through said inner wall at a height between said one end and said opposing end of said plurality of substrates, to form said silicon nitride films on said plurality of substrates.