Patent ID: 6709525
Filing Date: 2004-03-23
Classification: C23C

Abstract:
A vertical type chemical vapor deposition apparatus comprising:a process chamber having a cylindrical inner tube and a cap shaped outer tube surrounding and apart from the inner tube; a manifold, coupled with lower portions of the inner tube and the outer tube, having a lower portion at a circumference thereof tapered at an inclination angle; a heater, provided at an outer side of the outer tube, that heats an inner side of the process chamber to a process temperature; a boat that is movable into and out of the process chamber through the manifold as driven by an elevator, the boat being vertically loaded with a plurality of wafers; a cap, fixed to the elevator and coupled to a lower portion of the boat, having a portion that is contactable with the manifold and that is tapered at a same inclination angle as the lower portion of the manifold; and an O-ring inserted into the portion of the cap that is contactable with the manifold.