| 摘要 |
PURPOSE:To realize a high luminance with no unevenness with low power consumption, and downsize a device by combining an infrared light emitting boy consisting of a silicon carbide sintered body having prescribed physical properties, a leg part consisting of a heat resisting material having low heat conductivity, and a conductive member together. CONSTITUTION:A silicon carbide sintered body having a sintered body density of 2.8g/cm<3> or more and an electric specific resistance value at room temperature lower than 1OMEGAcm is thinned in the top end part, and superposed to form a flat infrared light emitting body 1. A heat resisting material of ceramic such as alumina having low heat conductivity is used for the leg part 2 between the light emitting body 1 and a electrode part 2, whereby the flow of heat from the light emitting body 1 is interrupted. A metal having high electric conductivity is used for a conductive member 4 between the electrode part 2 and the light emitting body 1. The light emitting body 1 and the leg part 3 are separately bonded to one side surface of the member 4 molded into a plate, and integrated thereto. The member 4 may consist of a thin film by evaporation. Thus, oxidation resistance, heat resistance, and thermal impact resistance are excellent, and S/N ratio is also enhanced. |
