Patent ID: 6306216
Filing Date: 2001-10-23
Classification: C23C,C30B

Abstract:
An apparatus for deposition of thin films on a plurality of wafers through an atomic layer epitaxial process within a sealed reaction chamber, comprising:a susceptor provided within said reaction chamber to hold the wafers thereon, said susceptor consisting of a plurality of wafer stations installed within said reaction chamber and used for holding the wafers respectively thereon such that reaction surfaces of said wafers are exposed to the interior of the reaction chamber, and a plurality of wafer seating units provided in said wafer stations respectively while penetrating the stations and being movable upward and downward in a vertical direction relative to the stations so as to seat the wafers in the wafer stations;a gas ejecting unit provided at an upper portion within said reaction chamber and adapted for ejecting reaction gases onto the reaction surfaces of said wafers within the reaction chamber;a gas feeding unit maintaining a predetermined temperature of the gases and feeding the reaction gases to said gas ejecting unit at predetermined time intervals so as to allow the gas ejecting unit to alternately eject the reaction gases into the reaction chamber;a susceptor drive unit adapted for rotating said susceptor at a predetermined velocity and vertically moving the susceptor to an upper optimal reaction position close to a ceiling of said reaction chamber;a vacuum pumping unit adapted for maintaining pressure of the reaction gases within the reaction chamber at a predetermined pressure, and discharging the reaction gases from the reaction chamber to the outside of said reaction chamber;a wafer heating unit positioned at a position under the susceptor within the reaction chamber, and used for heating the wafers held on the susceptor at a predetermined constant temperature; anda reaction chamber heating unit consisting of a plurality of chamber heaters regularly set within said reaction chamber in a radial direction, and heating the interior of the reaction chamber at a predetermined constant temperature.