Window material for ultraviolet-ray-emitting element and method for producing same
AssigneeNGK Insulators, Ltd.
InventorsMasaru NOMURA, Tsuneaki OHASHI, Sugio MIYAZAWA
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Abstract
A window material for an ultraviolet light emitting device for emitting an ultraviolet light having a wavelength of 300 nm or less is mounted on at least an ultraviolet light emitting side of the ultraviolet light emitting device. The window material for an ultraviolet light emitting device contains a translucent alumina substrate, and a surface of the window material has an average grain diameter of 6 to 60 μm.
Claims11
A window material for an ultraviolet light emitting device for emitting an ultraviolet light having a wavelength of 300 nm or less, the window material being mounted on at least an ultraviolet light emitting side of the ultraviolet light emitting device, wherein
- the window material contains a translucent alumina,
- a surface of the window material has an average grain diameter of 6 to 60 μm,
- the window material has one surface and another surface facing the one surface, and
- the one surface and the other surface each have a surface roughness of 0.6 μm or less.
A method for producing a window material for an ultraviolet light emitting device for emitting an ultraviolet light having a wavelength of 300 nm or less, the window material being mounted on at least an ultraviolet light emitting side of the ultraviolet light emitting device, wherein the window material contains a translucent alumina, a surface of the window material has an average grain diameter of 6 to 60 μm, the window material has one surface and another surface facing the one surface, and the one surface and the other surface each have a surface roughness of 0.6 μm or less, the method comprising the step of:
- performing a gel casting process or a tape casting process to prepare a substrate which contains a translucent alumina and has the one surface and the other surface.
Dependencies are inferred from the claim text.