Patent ID: 6702901
Filing Date: 2004-03-09
Classification: C23C

Abstract:
Chamber for a chemical vapor deposition comprising an inner quartz tube (1) encompassed by a shorter outer quartz tube (2), in which each end of the inner quartz tube (1) is encompassed by a first flange (3), which comprises a groove (3â€²) encircling in the longitudinal direction of the inner quartz tube (1), in which in each instance the front side of the inner quartz tube (1) is positioned, wherein between the first flange (3) and the outside of the inner quartz tube (1) a seal (5â€²) is disposed, and in which on the particular first flange (3) in the direction toward the tube center of a second flange (4) is disposed which comprises an encircling rim (4â€²) for fixing the front side of the shorter outer quartz tube (2) and which is in contact on the outside of the inner quartz tube (1) as well as also on the outside of the shorter outer quartz tube (2), wherein between the second flange (4) and the outside of the shorter outer quartz tube (2) a seal (5) is disposed, and minimally a second flange (4) comprises minimally one closable connection line (14), which is connected with the volume between the shorter outer quartz tube (2) and the inner quartz tube (1), and in which each first flange (3) and each second flange (4) on the inside comprises in each instance one cooling channel (8, 8â€²) with in each instance minimally one inlet and one outlet for a cooling medium.