Patent ID: 8295691
Filing Date: 2012-10-23
Classification: H01L

Abstract:
1. A heat treatment apparatus for irradiating a substrate with light to heat the substrate, comprising: a holding part for holding a substrate; a first light emitting part comprising a plurality of halogen lamps for emitting light toward a substrate held by said holding part from a position away from said substrate by a predetermined distance; a second light emitting part comprising a plurality of flash lamps for emitting a flash of light toward a substrate held by said holding part from a position away from said substrate by a predetermined distance; and a peripheral-light shielding part inserted between said first light emitting part and said holding part, for passing part of light which is emitted from said first light emitting part and goes toward said second light emitting part therethrough to let the part of light enter a substrate held by said holding part, while blocking out the remaining light; said peripheral-light shielding part comprises: a plate-like member inserted in parallel with a substrate held by said holding part, and said plate-like member comprises a window hole formed in its surface area, having a size equal to or smaller than that of a projection image of said substrate, which is orthographically projected on the surface area.