Abstract:
The present invention pertains to a window material for an ultraviolet-ray-emitting element and a method for producing the same. The window material (10) is for use in an ultraviolet-ray-emitting element and is positioned on at least the ultraviolet-ray-emitting side of an ultraviolet-ray-emitting element for emitting an ultraviolet ray (12) having a wavelength of 300nm or less. The window material (10) for an ultraviolet-ray-emitting element comprises a light-transmitting alumina substrate (14), and the average particle diameter of the surface thereof is 6-60µm. As a result, this window material (10) for an ultraviolet-ray-emitting element has high thermal conductivity, is capable of ensuring a high transmission rate of ultraviolet rays of 300nm or less, and is favorable for use in an ultraviolet-ray-emitting element.
Abstract:
PROBLEM TO BE SOLVED: To suppress the damage of the bottom face of a ceramic base material, and to improve an yield, in the ceramic base material which has a plurality of substrate regions corresponding to a plurality of ceramic substrates, and in which the adjacent substrate regions can be divided.SOLUTION: A ceramic base material has a plurality of substrate regions corresponding to a plurality of ceramic substrates, and an R-face or a C-face is formed at an outside ridge corner 12 of the ceramic base material.