Patent ID: 8686401
Filing Date: 2014-04-01
Classification: F21K,H01J,H01L

Abstract:
1. An ultraviolet irradiation apparatus comprising, in a vessel, a semiconductor multi-layered film element and an electron beam irradiation source for irradiating the semiconductor multi-layered film element with an electron beam, the vessel being hermetically sealed to have a negative internal pressure and having an ultraviolet transmitting window, wherein: the semiconductor multi-layered film element includes an active layer having a single quantum well structure or a multi quantum well structure of In the active layer of the semiconductor multi-layered film element is irradiated with an electron beam from the electron beam irradiation source, thereby allowing the semiconductor multi-layered film element to emit ultraviolet radiation out of the vessel through the ultraviolet transmitting window; and a following equation (1) is satisfied: where V (kV) is an acceleration voltage of the electron beam and t (nm) is a thickness of the active layer.