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公开(公告)号：US10038118B2
公开(公告)日：2018-07-31
申请号：US15713454
申请日：2017-09-22
Applicant: NICHIA CORPORATION
Inventor： Makoto Abe
CPC classification number: H01L33/32 , H01L33/0025 , H01L33/06 , H01L33/20 , H01S5/3013
Abstract: A light emitting element includes: an n-side semiconductor layer; a p-side semiconductor layer; an active layer comprising a plurality of well layers and a plurality of barrier layers, and being located between the n-side semiconductor layer and the p-side semiconductor layer. The plurality of barrier layers comprises a final barrier layer, which is a layer of the active layer that is closest to the p-side semiconductor layer. The p-side semiconductor layer comprises, from an active layer-side, a first p-side semiconductor layer, which is a layer of the p-side semiconductor layer that is closest to the active layer, and a second p-side semiconductor layer containing a p-type dopant and having a bandgap greater than a bandgap of the final barrier layer. The first p-side semiconductor layer has a bandgap smaller than the bandgap of the final barrier layer and greater than a bandgap of any of the well layers, and has a thickness smaller than a thickness of the final barrier layer.
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公开(公告)号：US09773946B2
公开(公告)日：2017-09-26
申请号：US15044868
申请日：2016-02-16
Applicant: NICHIA CORPORATION
Inventor： Makoto Abe , Keisuke Higashitani , Naoki Azuma , Akiyoshi Kinouchi
Abstract: A light-emitting element includes: a sapphire substrate having a c-plane at a main surface thereof; and a semiconductor layer provided at the main surface side of the sapphire substrate. The sapphire substrate includes a first unit including a first region, a second region, and a third region, wherein, when viewed from the main surface side, the three regions together have a shape of a regular hexagon that is evenly divided into the three regions such that each region has a shape of a rhombus; and a plurality of second units disposed to be aligned with each side of the first unit, the second unit having mirror symmetry relative to the first unit. The first unit and the second units are arranged to make a space at the center of the unit.
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公开(公告)号：US12027646B2
公开(公告)日：2024-07-02
申请号：US17365820
申请日：2021-07-01
Applicant: NICHIA CORPORATION
Inventor： Makoto Abe
CPC classification number: H01L33/32 , H01L33/0008 , H01L33/06
Abstract: A light emitting element includes: an n-side semiconductor layer made of a nitride semiconductor; a p-side semiconductor layer made of a nitride semiconductor; and an active layer disposed between the n-side semiconductor and the p-side semiconductor layer and having a multi-quantum well structure in which a plurality of nitride semiconductor well layers and a plurality of nitride semiconductor barrier layers are alternately stacked, wherein the light emitting element includes, between at least one of the plurality of well layers and the barrier layer disposed adjacent thereto on the p-side semiconductor side: a first layer and a second layer disposed successively from the well layer side.
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公开(公告)号：US10461222B2
公开(公告)日：2019-10-29
申请号：US15691551
申请日：2017-08-30
Applicant: NICHIA CORPORATION
Inventor： Makoto Abe , Keisuke Higashitani , Naoki Azuma , Akiyoshi Kinouchi
Abstract: A light-emitting element includes: a sapphire substrate having a c-plane at a main surface thereof; and a semiconductor layer provided at the main surface side of the sapphire substrate. The sapphire substrate includes a first unit including a first region, a second region, and a third region, wherein, when viewed from the main surface side, the three regions together have a shape of a regular hexagon that is evenly divided into the three regions such that each region has a shape of a rhombus; and a plurality of second units disposed to be aligned with each side of the first unit, the second unit having mirror symmetry relative to the first unit. The first unit and the second units are arranged to make a space at the center of the unit.
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