Patent ID: 6492648
Filing Date: 2002-12-10
Classification: H01L

Abstract:
A lamp annealing apparatus, comprising:a chamber; a support member for supporting a semiconductor wafer, said semiconductor wafer having a front surface on which semiconductor elements are to be formed and a rear surface; a lamp unit provided in said chamber at the side of said semiconductor wafer having the front surface; a reflector for stabilizing temperature provided in said chamber at the side of said semiconductor wafer having the rear surface; a first means for supplying a process gas to said front surface in said chamber to perform a process on said front surface of said semiconductor wafer; and a second means for supplying a rear face gas to said rear surface in said chamber to prevent clouding of said reflector; said rear face gas being a mixture gas including a first gas as a main gas and a second gas as a subordinate gas added said first gas; and said second means including a device which mixes said first gas and said second gas to become a desired mixture ratio.