Patent ID: 8261692
Filing Date: 2012-09-11
Classification: C23C,H01J

Abstract:
1. A substrate processing apparatus, comprising: a reaction tube having an inner and an outer wall, such that the inner walls defines a reaction chamber capable of accommodating a plurality of substrates; a buffer chamber disposed on the inner wall of said reaction tube within said reaction chamber and having a plurality of buffer chamber holes disposed in a wall of said buffer chamber to facilitate gas flow between the buffer chamber and the reaction chamber; a first gas introducing part that introduces a first processing gas into said buffer chamber; a second gas introducing part, disposed outside said buffer chamber, that introduces a second processing gas into said reaction chamber; a gas exhaust opening provided at the inner wall of said reaction tube and at a position opposite from said buffer chamber such that said substrates are positioned therebetween; and a pair of activation-member-protecting tubes disposed in said buffer chamber and extending lengthwise along a stacking direction of the substrates such that the buffer chamber holes are located between the tubes and the tubes are in contact with the wall of the buffer chamber, thereby limiting a number of paths the first processing gas may take in flowing from the first gas introducing part to the buffer chamber holes to only those paths that cause the first processing gas to pass between the tubes, wherein a film is formed on surface of said substrates by supplying said first processing gas introduced into said reaction chamber from said first gas introducing part through said buffer chamber holes and said second processing gas interchangeably for a plurality of times.