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Composite graphic substrate and method for making same, LED structure and method for making same

A technology of LED structure and manufacturing method, applied in semiconductor devices, electrical components, circuits, etc., can solve the problems of low luminous efficiency of LED, and achieve the effect of improving luminous efficiency and avoiding absorption

Active Publication Date: 2021-11-05
QUANZHOU SANAN SEMICON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the light emitted by the LED chip in the prior art is reflected and absorbed multiple times in the substrate, which leads to low LED luminous efficiency and other problems.

Method used

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  • Composite graphic substrate and method for making same, LED structure and method for making same
  • Composite graphic substrate and method for making same, LED structure and method for making same
  • Composite graphic substrate and method for making same, LED structure and method for making same

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Embodiment 1

[0096] This embodiment provides a composite graphics substrate, such as figure 2 As shown, the composite pattern substrate includes: a sapphire substrate 11, a plurality of columnar protrusions 110 are formed on the front side of the sapphire substrate; a DBR total reflector 12, and the DBR total reflector 12 is located on the columnar protrusion Between the protrusions 110, and flush with the columnar protrusions 110; the graphic medium layer 13 is located above the DBR total reflector 12, and the graphic medium layer 13 corresponds to the DBR total reflector 12 one by one and Align top and bottom.

[0097] As an example, a plurality of columnar protrusions 110 are formed on the front surface of the sapphire substrate, and the columnar protrusions are arranged in a hexagonal close-packed arrangement. The cross-sectional shape of the columnar protrusion may be any shape such as a circle, an ellipse, a rectangle, or a polygon. In this embodiment, taking a cylindrical protrus...

Embodiment 2

[0117] The present invention provides an LED structure, such as Figure 9 As shown, the LED structure includes: an epitaxial substrate 10, which is a composite pattern epitaxial substrate; a light emitting structure formed on the epitaxial substrate, and the light emitting structure includes sequentially formed on the epitaxial substrate The first semiconductor layer 41, the multiple quantum well layer 50, and the second semiconductor layer 42 opposite in conductivity to the first semiconductor layer are formed on the front surface of the substrate.

[0118] As an example, the composite pattern epitaxial substrate described in this embodiment is the composite pattern substrate described in Embodiment 1, refer again to figure 2 , the composite graphics substrate includes: a sapphire substrate 11, a plurality of columnar protrusions 110 are formed on the front side of the sapphire substrate; a DBR total reflector 12, and the DBR total reflector 12 is located on the columnar pro...

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Abstract

The invention provides a composite pattern substrate and its manufacturing method as well as an LED structure and its manufacturing method. The composite pattern substrate comprises: a sapphire substrate with a plurality of columnar protrusions formed on the front; A DBR total reflector between the protrusions and flush with the columnar protrusions; a graphic medium layer located above the DBR total reflectors, one-to-one corresponding to the DBR total reflectors and aligned up and down. The DBR total reflector forms a total reflection interface at the interface between the sapphire and the epitaxial layer, which reduces the absorption of light in the substrate. In addition, the graphic medium completely eliminates the defect crystal at the side wall, greatly reducing the defect light absorption phenomenon. By using the LED structure of the total reflection composite graphic substrate of the present invention, the absorption of light in the substrate can be reduced, and the luminous efficiency of the LED can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of semiconductor device preparation, and in particular relates to a composite pattern substrate and a manufacturing method thereof, as well as an LED structure and a manufacturing method thereof. Background technique [0002] Due to the advantages of high luminous efficiency and longer service life, LEDs have been widely used in various light source fields such as backlighting, lighting, and landscape. Further improving the luminous efficiency of LED chips is still the focus of current industry development. The luminous efficiency of the LED chip is mainly determined by two efficiencies. The first is the radiative recombination efficiency of electron holes in the active region, which is commonly known as the internal quantum efficiency; the second is the light extraction efficiency. For the improvement of light extraction efficiency, the current industry mainly improves from two directions: the graphic sapp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/20H01L33/46H01L33/06H01L33/00
CPCH01L33/005H01L33/06H01L33/20H01L33/46
Inventor 朱学亮寻飞林卢德恩黄景蜂林忠宝彭伟伦黄文嘉
Owner QUANZHOU SANAN SEMICON TECH CO LTD