Patent ID: 9004667
Filing Date: 2015-04-14
Classification: B41J,H01L

Abstract:
1. A light irradiation device, comprising: a light emitting element; and a substrate on which the light emitting element is mounted, the substrate comprising a laminated body constituted so that a plurality of insulating layers are laminated, a first heat transfer member disposed in the laminated body so that a part thereof is located directly below the light emitting element, and a second heat transfer member disposed between the insulating layers so as to surround the first heat transfer member when seen in a plan view, thermal conductivities of the first heat transfer member and second heat transfer member being higher than a thermal conductivity of the laminated body, wherein a top face of the first heat transfer member is covered by a part of the insulating layer, and the light emitting element is mounted on the top face of the first heat transfer member through the part of the insulating layer.