Patent ID: 8742444

Claim:
A semiconductor light-emitting device comprising: a semiconductor light-emitting element for emitting ultraviolet light having a wavelength in an ultraviolet or deep ultraviolet region; a cap part which shields the ultraviolet light, the cap part encircling the semiconductor light-emitting element; a through-hole which is formed in a top part of the cap part and through which the ultraviolet light passes; a translucent cover through which some or all of the ultraviolet light is transmitted, the translucent cover being disposed so as to hermetically close up the through-hole; and a UV-excited phosphor excited by part of the ultraviolet light and emitting visible light, the UV-excited phosphor being disposed inside the cap part, wherein the UV-excited phosphor is arranged such that the visible light passes mostly through a peripheral portion of the through-hole and the ultraviolet light passes mostly through an area of the through-hole surrounded by the peripheral portion.