Substrate for mounting a light-emitting element and circuit board for mounting a light-emitting element that includes it, and light-emitting element module
AssigneeKYOCERA Corporation
InventorKouji Matsushita
Life of this patent
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Abstract
A substrate for mounting a light-emitting element according to the present disclosure contains a crystal particle of aluminum oxide and is composed of an alumina-based ceramic that contains 97% by mass or more of Al as a value of an Al2O3 equivalent among 100% by mass of all components thereof. An average value of an equivalent circle diameter of the crystal particle is 1.1 μm or greater and 1.8 μm or less and a standard deviation of an equivalent circle diameter thereof is 0.6 μm or greater and 1.4 μm or less.
Claims7
A substrate for mounting a light-emitting element-that contains a crystal particle of aluminum oxide and is composed of an alumina-based ceramic that contains 97% by mass or more of Al as a value of an Al2O3 equivalent among 100% by mass of all components thereof, wherein an average value of an equivalent circle diameter of the crystal particle is 1.1 μm or greater and 1.8 μm or less and a standard deviation of an equivalent circle diameter thereof is 0.6 μm or greater and 1.4 μm or less, wherein a number of a crystal particle with an equivalent circle diameter that is 2 μm or greater and an aspect ratio that is 2 or greater is 10 or more and 25 or less, within a range of a surface area of 1344 μm2 on a surface thereof.
Dependencies are inferred from the claim text.