Patent ID: 6666921
Filing Date: 2003-12-23
Classification: C23C,C30B

Abstract:
A chemical vapor deposition apparatus for a semiconductor film, which comprises a horizontal tubular reactor equipped with a susceptor for mounting a substrate thereon, a heater for heating the substrate, a feed gas introduction portion arranged such that the direction of a feed gas supplied in the tubular reactor is made substantially parallel to the substrate and a reaction gas exhaust portion, wherein the constitution of the apparatus is such that part of the tubular reactor walls in opposition to a substrate inclines downward from the upstream side of the feed gas passageway towards the downstream side thereof,wherein the inclined tubular reactor wall portion is located so that the upstream side end of the inclined tubular reactor wall portion is placed between a gas feed port in the feed gas introduction portion and the position corresponding to the upstream side end of the feed gas passageway for the susceptor, and the downstream side end of the inclined tubular reactor wall portion is placed between the position corresponding to the upstream side end of the feed gas passageway for the susceptor and the position corresponding to the center of the feed gas passageway for the susceptor.