Method for producing group 3-5 nitride semiconductor and method for producing light-emitting device
First Claim
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1. A method for producing a group 3-5 nitride semiconductor, comprising the steps of (i), (ii), and (iii) in this order:
- (i) placing spherical inorganic particles directly on a substrate consisting of sapphire, SiC, Si, MgAl2O4, LiTaO3, ZrB2, GaN, or AlN to form a mask, wherein the placement is carried out by a method of dipping the substrate in a slurry containing the inorganic particles and a medium, or a method of applying or spraying the slurry onto the substrate and then drying the slurry,(ii) epitaxially growing a semiconductor layer by using said mask formed from said inorganic particles whereby said inorganic particles are embedded in the semiconductor layer, the semiconductor layer having a form of a multilayer and including a low temperature grown buffer layer having a thickness from 100 Å
to 5000 Å
adjacent to the substrate, and(iii) separating the substrate and the semiconductor layer by irradiating the interface between the substrate and the semiconductor layer with light, wherein the light is further irradiated to the inorganic particles.
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Abstract
A method for producing a group 3-5 nitride semiconductor includes the steps of (i), (ii), (iii) in this order: (i) placing inorganic particles on a substrate, (ii) epitaxially growing a semiconductor layer by using the inorganic particles as a mask, and (iii) separating the substrate and the semiconductor layer by irradiating the interface between the substrate and the semiconductor layer with light; and a method for producing a light emitting device further includes adding electrodes.
21 Citations
15 Claims
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1. A method for producing a group 3-5 nitride semiconductor, comprising the steps of (i), (ii), and (iii) in this order:
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(i) placing spherical inorganic particles directly on a substrate consisting of sapphire, SiC, Si, MgAl2O4, LiTaO3, ZrB2, GaN, or AlN to form a mask, wherein the placement is carried out by a method of dipping the substrate in a slurry containing the inorganic particles and a medium, or a method of applying or spraying the slurry onto the substrate and then drying the slurry, (ii) epitaxially growing a semiconductor layer by using said mask formed from said inorganic particles whereby said inorganic particles are embedded in the semiconductor layer, the semiconductor layer having a form of a multilayer and including a low temperature grown buffer layer having a thickness from 100 Å
to 5000 Å
adjacent to the substrate, and(iii) separating the substrate and the semiconductor layer by irradiating the interface between the substrate and the semiconductor layer with light, wherein the light is further irradiated to the inorganic particles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for producing a light emitting device, comprising the steps of (i), (ii), (iii) and (iv) in this order:
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(i) placing spherical inorganic particles directly on a substrate consisting of sapphire, SiC, Si, MgAl2O4, LiTaO3, ZrB2, GaN, or AlN to form a mask, wherein the placement is carried out by a method of dipping the substrate in a slurry containing the inorganic particles and a medium, or a method of applying or spraying the slurry onto the substrate and then drying the slurry, (ii) epitaxially growing a semiconductor layer by using said mask formed from said inorganic particles whereby said inorganic particles are embedded in said semiconductor layer, the semiconductor layer having a form of a multilayer and including a low temperature grown buffer layer having a thickness from 100 Å
to 5000 Å
adjacent to the substrate, and(iii) separating the substrate and the semiconductor layer by irradiating the interface between the substrate and the semiconductor layer with light, wherein the light is further irradiated to the inorganic particles, and (iv) forming electrodes. - View Dependent Claims (14)
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15. A method for producing a group 3-5 nitride semiconductor, comprising the steps of (i), (ii), and (iii) in this order:
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(i) placing spherical inorganic particles directly on a substrate consisting of sapphire, SiC, Si, MgAl2O4, LiTaO3, ZrB2, GaN, or AlN to form a mask, wherein the placement is carried out by a method of dipping the substrate in a slurry containing the inorganic particles and a medium, or a method of applying or spraying the slurry onto the substrate and then drying the slurry, (ii) epitaxially growing a semiconductor layer by using said mask formed from said inorganic particles wherein a penetration region in the semiconductor layer adjoining the interface between the semiconductor layer and the substrate is formed, and the inorganic particles are embedded in the penetration region in the semiconductor layer, the semiconductor layer having a form of a multilayer and including a low temperature grown buffer layer having a thickness from 100 Å
to 5000 Å
adjacent to the substrate, and(iii) separating the substrate and the semiconductor layer by irradiating the adjoining penetration region and the interface between the substrate and the semiconductor layer with light, wherein embedded inorganic particles are irradiated.
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