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US 10,950,768 B2Granted
Circuit board and light-emitting device provided with same
AssigneeKYOCERA Corporation
InventorYuichi Abe
Life of this patent
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Abstract
A circuit board of the present disclosure includes a substrate, a conductor layer located on the substrate, a reflective layer located on the conductor layer, and a resin layer located on the substrate to be in contact with the conductor layer and the reflective layer. In a surface of the reflective layer, arithmetic mean roughness Ra obtained from a roughness profile is less than 0.2 μm, and a ratio of kurtosis Rku obtained from a roughness profile to skewness Rsk obtained from a roughness profile is 5 or more and 15 or less.
Claims16
A circuit board comprising:
- a substrate;
- a conductor layer located on the substrate;
- a reflective layer located on the conductor layer;
- and
- a resin layer located on the substrate to be in contact with the conductor layer and the reflective layer, wherein
- in a surface of the reflective layer, arithmetic mean roughness Ra obtained from the roughness profile is less than 0.2 μm and a ratio of kurtosis Rku obtained from the roughness profile to skewness Rsk obtained from a roughness profile is 5 or more and 15 or less.
3 more elements
Dependencies are inferred from the claim text.