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Light emitting diode grain and preparation method thereof

A technology of light-emitting diodes and manufacturing methods, which is applied to semiconductor devices, electrical components, circuits, etc., can solve the problems of reducing the light-emitting efficiency of light-emitting diode crystal grains, and achieve the effect of improving light-emitting efficiency

Inactive Publication Date: 2013-09-18
ZHANJING TECH SHENZHEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned structure has the following problems: the light emitted by the semiconductor light-emitting structure toward the substrate side will be absorbed by the substrate after entering the substrate, thereby reducing the light extraction efficiency of the light-emitting diode crystal grains

Method used

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  • Light emitting diode grain and preparation method thereof
  • Light emitting diode grain and preparation method thereof
  • Light emitting diode grain and preparation method thereof

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Embodiment Construction

[0020] Such as figure 1 As shown, the LED die 100 provided in the first embodiment of the present invention includes: a substrate 10, a buffer layer 20 formed on the substrate 10, a transition layer formed on the buffer layer 20, and a buffer layer formed on the buffer layer 20. Aluminum nitride 50 on the transition layer, and an electrical layer 60 formed on the transition layer and covering the aluminum nitride 50 .

[0021] The substrate 10 is in the shape of a regular flat plate, which can be made of materials such as sapphire, silicon carbide (SiC), silicon (Si) or gallium nitride (GaN), preferably sapphire in this embodiment, to control light emission Chip manufacturing costs.

[0022] The transition layer includes a first transition layer 30 and a second transition layer 40 formed on the first transition layer 30 . The buffer layer 20, the first transition layer 30 and the second transition layer 40 can be deposited by metal-organic chemical vapor deposition (Metal-Or...

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Abstract

A light emitting diode grain comprises a substrate and an electrical layer formed on the substrate. A transition layer is formed between the substrate and the electrical layer and the transition layer comprises a smooth region with a smooth surface and a pattern region with a rough surface. The electrical layer is in contact with the surface of the smooth region of the transition layer, spherical aluminum nitride is clamped between the electrical layer and the transition layer, and a gap is formed between the electrical layer and the pattern region of the transition layer. According to the invention, the transition layer provided with a rough surface is first formed between the electrical layer and the substrate, the spherical aluminum nitride is then formed between the transition layer and the electrical layer, the aluminum nitride is matched with the rough surface, and a gap is formed between the aluminum nitride and the electrical layer. Thus, the probability that light emitted by a light emitting layer towards the substrate is emitted upwards through total reflection can be improved, and the light efficiency of the light emitting diode grain can be improved. The invention further relates to a method for preparing the light emitting diode grain.

Description

technical field [0001] The invention relates to a light-emitting diode crystal grain and a manufacturing method thereof, in particular to a light-emitting diode crystal grain with high light extraction efficiency and a manufacturing method thereof. Background technique [0002] A light emitting diode (Light Emitting Diode, LED) is a semiconductor element that can convert electric current into light in a specific wavelength range. Light-emitting diodes can be widely used as light sources in the field of lighting because of their advantages such as high brightness, low operating voltage, low power consumption, easy matching with integrated circuits, simple driving, and long life. [0003] Existing light-emitting diode grains generally include a substrate and a semiconductor light-emitting structure grown on the surface of the substrate. However, the above structure has the following problem: the light emitted by the semiconductor light-emitting structure towards the substrate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/10H01L33/22
CPCH01L33/10H01L33/22H01L33/32H01L33/58
Inventor 黄嘉宏黄世晟凃博闵林雅雯杨顺贵
Owner ZHANJING TECH SHENZHEN
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