Abstract: To provide a package for light emitting element accommodation that realizes enhanced reflectance without application of a metal plating onto a ceramic. There is provided a package for light emitting element accommodation comprising ceramic substrate (2) having conductor mounting region (8) for mounting of light emitting element (1) on its upper surface; frame (4) of a light reflecting material containing 74.6 mass % or more of alumina whose average particle diameter after sintering is 2.5 ?m or less, the frame (4) disposed on an upper surface of the substrate (2) in such a fashion that internal circumferential surface (7) of through-hole (3) expands outward; and light emitting element (1) mounted on the conductor mounting region (8) of the substrate (2). Thus, the reflectance of the frame (4) is enhanced without application of a metal plating thereonto.

Abstract: An alumina ceramic contains a Ba0.808Al1.71Si2.29O8 phase. The alumina ceramic has high reflectivity and is useful as a reflecting material for a light emitting element. The alumina ceramic which exhibits an X-ray diffraction pattern having a ratio of the peak intensity at 2?=43.3° to that at 22.5° of 0.5 to 2.5 has particularly high reflectivity. The alumina ceramic shows high reflectivity particularly at wavelengths ranging from 300 to 400 nm.

Abstract: [PROBLEMS] To provide a package for light emitting element accommodation that realizes enhanced reflectance without application of a metal plating onto a ceramic. [MEANS FOR SOLVING PROBLEMS] There is provided a package for light emitting element accommodation comprising ceramic substrate (2) having conductor mounting region (8) for mounting of light emitting element (1) on its upper surface; frame (4) of a light reflecting material containing 74.6 mass % or more of alumina whose average particle diameter after sintering is 2.5 ?m or less, the frame (4) disposed on an upper surface of the substrate (2) in such a fashion that internal circumferential surface (7) of through-hole (3) expands outward; and light emitting element (1) mounted on the conductor mounting region (8) of the substrate (2). Thus, the reflectance of the frame (4) is enhanced without application of a metal plating thereonto.

Abstract: An alumina ceramic contains a Ba0.808Al1.71Si2.29O8 phase. The alumina ceramic has high reflectivity and is useful as a reflecting material for a light emitting element. The alumina ceramic which exhibits an X-ray diffraction pattern having a ratio of the peak intensity at 2?=43.3° to that at 22.5° of 0.5 to 2.5 has particularly high reflectivity. The alumina ceramic shows high reflectivity particularly at wavelengths ranging from 300 to 400 nm.

Abstract: [Problems] To provide a package for light emitting element accommodation that realizes enhanced reflectance without application of a metal plating onto a ceramic. [Means for Solving Problems] There is provided a package for light emitting element accommodation comprising ceramic substrate (2) having conductor mounting region (8) for mounting of light emitting element (1) on its upper surface; frame (4) of a light reflecting material containing 74.6 mass % or more of alumina whose average particle diameter after sintering is 2.5 ?m or less, the frame (4) disposed on an upper surface of the substrate (2) in such a fashion that internal circumferential surface (7) of through-hole (3) expands outward; and light emitting element (1) mounted on the conductor mounting region (8) of the substrate (2). Thus, the reflectance of the frame (4) is enhanced without application of a metal plating thereonto.