PHOSPHOR CERAMIC, SEALED OPTICAL SEMICONDUCTOR ELEMENT, CIRCUIT BOARD, OPTICAL SEMICONDUCTOR DEVICE AND LIGHT-EMITTING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide: a phosphor ceramic satisfactory in permeability and scattering ability, and superior in productivity, which enables the reduction in speckle noise; and a sealed optical semiconductor element, a circuit board, an optical semiconductor device and a light-emitting device, each having such a phosphor ceramic.SOLUTION: A phosphor ceramic has pores of 3.0-12.0 μm in pore diameter. The pores account for 1.5-9.5 vol.% of the phosphor ceramic on a volume basis.SELECTED DRAWING: Figure 1