Light emitting diode and manufacturing method thereof

A technology of light-emitting diodes and manufacturing methods, applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve the problems of sacrificing the area of ​​the active area, increasing the cost of chip manufacturing, and current congestion, so as to improve the ohmic contact capability and increase the current The effect of blocking ability and uniform distribution of current
CN107546307AActive Publication Date: 2018-01-05XIAMEN CHANGELIGHT CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
XIAMEN CHANGELIGHT CO LTD
Publication Date
2018-01-05

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Abstract

The invention discloses a light emitting diode (LED) and a manufacturing method thereof. The LED comprises a substrate, a buffer layer, an unintentional doping layer, a first doping layer, a first heavy doping layer, a first ohmic contact layer, a first high doping layer, a first isolation layer, a second doping layer, a first current blocking layer, an active region, a second current blocking layer, a third doping layer, a second ohmic contact layer, a transparent conductive layer, a first electrode, a second electrode and a third electrode, wherein the second doping layer comprises a first platform, the first high doping layer comprises a second platform, the first ohmic contact layer comprises a third platform, the first platform, the second platform and the third platform are differentin surface roughness, the first electrode directly contacts with the first platform, the second platform and the third platform, and the first electrode and the second electrode realize electrical isolation through a second protection layer. The LED is advantaged in that the manufacturing process is simple, manufacturing cost of chips is reduced, and a current congestion problem of the LED is effectively solved.
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Description

technical field

[0001] The present invention relates to light-emitting diodes, and more specifically, to a light-emitting diode and a manufacturing method thereof. Background technique

[0002] A light emitting diode (Light Emitting Diode, LED) is an optoelectronic semiconductor element that can convert current into a specific wavelength range. It has the advantages of low power consumption, small size, high brightness, easy matching with integrated circuits, and high reliability, and is widely used as a light source.

[0003] Current blue-green light-emitting diodes have the problem of current crowding, especially for high-power light-emitting diodes, which causes a significant drop in saturation current to a large extent, thereby reducing light efficiency. The inventors found that the reason for the current crowding is that the structure of blue-green light-emitting diodes is mostly epitaxial multi-layer gallium nitride-based material structure on a sapphire substrate, an...

Claims

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