Patent ID: 7566625

Claim:
A heat treatment method comprising the steps of: holding a treatment substrate in a processing chamber; heating the treatment substrate by irradiating it with a radiation from a lamp light source which is held for 0.1 to 20 seconds wherein a temperature rise rate of the treatment substrate is 100 to 200° C. per second, while supply of a first inactive gas is kept in the processing chamber so that the first inactive gas passes along an irradiated surface of the treatment substrate and a surface opposite to the irradiated surface of the treatment substrate; and cooling the treatment substrate wherein a temperature drop rate of the treatment substrate is 50 to 150° C. per second, while supply of a second inactive gas is kept in the processing chamber so that the second inactive gas passes along the irradiated surface of the treatment substrate and the surface opposite to the irradiated surface of the treatment substrate, wherein the radiation from the lamp light source is a pulsed and linear light.