Patent ID: 7625448
Filing Date: 2009-12-01
Classification: C23C,C30B

Abstract:
1. A device for depositing crystalline layers on one or more substrates in a process chamber, said process chamber comprising a ceiling and a heated floor that is vertically opposite the ceiling and receives the substrates, said device comprising: a gas inlet member disposed at substantially the center of the process chamber, which forms gas inlet zones disposed vertically one above the other for introducing at least a first and a second gaseous starting material separately from one another; a bottom gas inlet zone neighboring the floor of the process chamber for introducing a first starting material into the process chamber; a top gas inlet zone neighboring the ceiling of the process chamber also for introducing the first starting material into the process chamber; a middle gas inlet zone between the top gas inlet zone and bottom gas inlet zone for introducing the second starting material into the process chamber; a single supply of a hydride connected to both the bottom and the top gas inlet zones, the hydride being the first starting material; a supply of a metalorganic compound connected to the middle gas inlet zone, the metalorganic compound being the second starting material; at least one substrate carrier arranged around the gas inlet member, being rotationally driven around its axis and carrying the one or more substrates; and wherein the starting materials flow in a horizontal direction together with a carrier gas through the process chamber, the stream of gas being homogenized and the starting materials at least partially pre-decomposed in an inlet zone directly adjacent the gas inlet member, the decomposition products of which starting materials are deposited on the substrates in a growing zone adjacent the inlet zone, while the stream of gas is steadily depleted.