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Small-divergence-angle N-type common-cathode Micro LED device and array thereof

A small divergence, common cathode technology, applied in the direction of electric solid-state devices, semiconductor devices, electrical components, etc., can solve the problem of Micro LED light efficiency decline and other issues

Pending Publication Date: 2021-12-03
廊坊广通电子设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem of the reduction of Micro LED light efficiency caused by the use of transparent cathode materials and open cathode materials

Method used

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  • Small-divergence-angle N-type common-cathode Micro LED device and array thereof
  • Small-divergence-angle N-type common-cathode Micro LED device and array thereof
  • Small-divergence-angle N-type common-cathode Micro LED device and array thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Example 1: Small divergence angle N-type common-cathode Micro LED device and its array for ultraviolet digital exposure

[0039]The small divergence angle N-type common cathode Micro LED device provided in Example 1 includes a micro-optical system 1, an insulating isolation structure 2, an isolation structure 3, a pixel electrode 4, an N-type semiconductor 5, a quantum well layer 6, and a P-type semiconductor 7 . It should be noted that the isolation structure 3 is a light-absorbing material that absorbs the light emitted by the quantum well layer 6, and finally absorbs stray light with a large angle, thereby improving the beam quality.

[0040] Preferably, the micro-optical system 1 is a single plano-convex lens.

[0041] Preferably, the insulating isolation structure 2 is filled with aluminum oxide (AlO).

[0042] Preferably, the isolation structure 3 is an aluminum oxide (AlO) thin film with a thickness of 10 nm.

[0043] Further preferably, the upper surface of t...

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Abstract

The invention provides a small-divergence-angle N-type common-cathode Micro LED device and an array thereof. The small-divergence-angle N-type common-cathode Micro LED device comprises a micro-optical system, an insulation isolation structure, an isolation structure, a pixel electrode, an N-type semiconductor, a quantum well layer and a P-type semiconductor. Due to LED light emitting principle factors, the light emitting divergence angle of a Micro LED device is too large, and light emitted by the Micro LED device and an array of the Micro LED device needs to have a small divergence angle due to the limitation of the numerical aperture of a projection lens in the industrial exposure field and the image projection field. According to the invention, the divergence angle is further converged by integrating an insulation isolation structure, an isolation structure and a micro-optical system on the Micro LED device, so that the Micro LED device can be applied to the industrial exposure field and the image projection field. The N-type semiconductors on the Micro LED are mutually connected to form a common cathode structure, so that the process flow is further simplified, and the production cost is reduced. By means of the high integration level and the controllable light field divergence angle, the Micro LED is finally pushed to the large-scale application stage of the industrial exposure field and the image projection field.

Description

technical field [0001] The invention relates to an N-type common-cathode Micro LED device with a small divergence angle and an array thereof. Background technique [0002] Micro LED technology generally refers to the technology in which tiny LED particles are powered and switched on and off through controllable electrodes. At present, the size of Micro LEDs ranges from microns to hundreds of microns. Generally, relatively large LED particles are called Mini LEDs, but the distinction between Mini LEDs and Micro LEDs is relatively vague. The Micro LED described in this patent contains micro LED particles with a diameter less than or equal to 500 microns. In the definition of some researchers, Mini LED also includes micro LED particles below 500 microns. Within the overlapping interval defined by both Micro LED and Mini LED, the Micro LED referred to in this article can also be named by the name of Mini LED. That is, it can also be understood that the Micro LED described in...

Claims

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Application Information

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IPC IPC(8): H01L33/60H01L33/40H01L33/58H01L33/48H01L25/075H01L27/15
CPCH01L33/60H01L33/58H01L33/40H01L33/405H01L33/48H01L25/0753H01L27/156H01L27/153
Inventor 孙雷张婧姣
Owner 廊坊广通电子设备有限公司
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