Patent ID: 9082728
Filing Date: 2015-07-14
Classification: H01L,H05B

Abstract:
1. A heat treatment method for heating a substrate by emitting light to the substrate, said heat treatment method comprising: (a) performing a first flash heating step, to effect said heat treatment, including emitting from a flash lamp a flashing light to the substrate that has been heated to a first preheating temperature equal to or lower than 650 degrees C. by a light emission from a halogen lamp, so that the flashing light causes the temperature of a surface of the substrate to reach 1000 degrees C. or higher; and (b) performing a second flash heating step, further effective to obtain said heat treatment of said substrate, performed after said first flash heating step, including emitting from the flash lamp a second flashing light to the substrate after said substrate has been heated to a second preheating temperature higher than said first preheating temperature by a light emission from said halogen lamp, further comprising, after said second flash heating step, a step of emitting a light from said halogen lamp to thereby heat the substrate to a temperature equal to or higher than 1000 degrees C. that exceeds said second preheating temperature.