Semiconductor light emitting element
First Claim
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1. A semiconductor light emitting element, comprising:
- a compound semiconductor substrate having a first conductivity type;
a light emitting layer formed on the compound semiconductor substrate;
a compound semiconductor interface layer formed on the light emitting layer, said compound semiconductor interface layer having a second conductivity type and not containing Al; and
a current diffusion layer formed on the compound semiconductor interface layer, said current diffusion layer having the second conductivity type and being made of a compound semiconductor not containing Al, wherein a carrier concentration of the current diffusion layer increases from a region thereof over the compound semiconductor interface layer toward a region thereof under an upper electrode.
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Abstract
The semiconductor light emitting element of the present invention includes: a compound semiconductor substrate having a first conductivity type; a light emitting layer; a compound semiconductor interface layer having a second conductivity type and not containing Al; and a current diffusion layer having the second conductivity type and being made of a compound semiconductor not containing Al.
12 Citations
18 Claims
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1. A semiconductor light emitting element, comprising:
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a compound semiconductor substrate having a first conductivity type;
a light emitting layer formed on the compound semiconductor substrate;
a compound semiconductor interface layer formed on the light emitting layer, said compound semiconductor interface layer having a second conductivity type and not containing Al; and
a current diffusion layer formed on the compound semiconductor interface layer, said current diffusion layer having the second conductivity type and being made of a compound semiconductor not containing Al, wherein a carrier concentration of the current diffusion layer increases from a region thereof over the compound semiconductor interface layer toward a region thereof under an upper electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A semiconductor light emitting element, comprising:
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a compound semiconductor substrate having a first conductivity type;
a light emitting layer formed on the compound semiconductor substrate;
a compound semiconductor interface layer formed on the light emitting layer, said compound semiconductor interface layer having a second conductivity type and not containing Al;
a current diffusion layer formed on the compound semiconductor interface layer, said current diffusion layer having the second conductivity type and being made of a compound semiconductor not containing Al;
a current constriction layer formed between the compound semiconductor interface layer and the current diffusion layer, said current constriction layer having the first conductivity type and having an opening therethrough; and
an electrode layer formed on the current diffusion layer, said electrode layer having an opening aligned with the opening of said current constricting layer, wherein a carrier concentration of the current diffusion layer increases toward an electrode-layer-side thereof. - View Dependent Claims (13, 14)
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15. A semiconductor light emitting element, comprising:
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a compound semiconductor substrate having a first conductivity type;
a light emitting layer formed on the compound semiconductor substrate;
a compound semiconductor interface layer formed on the light emitting layer, said compound semiconductor interface layer having a second conductivity type and not containing Al;
a current diffusion layer formed on the compound semiconductor interface layer, said current diffusion layer having the second conductivity type and being made of a compound semiconductor not containing Al; and
a current constriction layer provided between the compound semiconductor interface layer and the current diffusion layer and being made of a compound semiconductor not containing Al, wherein the interface layer, the current constriction layer and the current diffusion layer are made of the same compound semiconductor. - View Dependent Claims (16, 17, 18)
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Specification