Patent ID: 6293696
Filing Date: 2001-09-25
Classification: G01J

Abstract:
A method for calibrating a temperature sensing device in a thermal processing chamber comprising the steps of:providing a thermal processing chamber, said thermal processing chamber containing radiation sensing devices for monitoring the temperature of a semiconductor wafer placed in said chamber, said thermal processing chamber being in communication with a plurality of light energy sources for heating semiconductor wafers contained in said chamber, said chamber further including a calibrating light source;placing a reflective device within said thermal processing chamber, said reflective device being positioned opposite said radiation sensing devices;emitting light energy from said calibrating light source onto said reflective device, said reflective device reflecting an amount of light energy having a preset value onto said radiation sensing devices;sensing said amount of light energy being reflected from said reflective device by said radiation sensing devices; andcalibrating said radiation sensing devices based upon the amount of light energy sensed by said radiation sensing devices in relation to said preset value.