Patent ID: 9385277
Filing Date: 2016-07-05
CPC Classification: B82Y,H01L,H01S

Claim Text:
1. A semiconductor light emitting device comprising: a nitride semiconductor light emitting element including a nitride semiconductor substrate having a polar or semipolar surface and a nitride semiconductor multilayer film stacked on the polar or semipolar surface; and a mounting section to which the nitride semiconductor light emitting element is mounted, wherein the nitride semiconductor multilayer film includes an electron block layer, a lattice constant of the electron block layer is smaller than a lattice constant of the nitride semiconductor substrate, the mounting section includes at least a first mounting section base, a thermal expansion coefficient of the first mounting section base is lower than a thermal expansion coefficient of the nitride semiconductor multilayer film, and a thermal conductivity of the first mounting section base is higher than a thermal conductivity of the nitride semiconductor multilayer film, an amount of heat generation in the nitride semiconductor light emitting element is greater than or equal to 3 W, the heat generation during an operation of the nitride semiconductor light emitting element induces compression strain in the nitride semiconductor multilayer film to increase effective height of the electron block layer, the compression strain being induced due to a thermal expansion coefficient of the nitride semiconductor light emitting element, and the thermal expansion coefficient of the first mounting section base, the mounting section has a first face and a second face opposite to the first face, the nitride semiconductor light emitting element is disposed on the first face, a first electrode is disposed on the first face, and a second electrode is disposed on the second face, and a thickness of the mounting section is 10 times as large as or larger than a sum of thicknesses of the first and second electrodes.