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LED wafer sorting method

A sorting and wafer technology, applied in sorting and other directions, can solve problems such as missed grasping, and achieve the effect of reducing costs, reducing the number of jacking ups, and reducing the number of grasping times

Pending Publication Date: 2022-03-08
FOSHAN NATIONSTAR SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in this application is to provide a sorting method for LED wafers, which has high sorting accuracy and effectively solves the problems of missing and wrong picking

Method used

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Embodiment Construction

[0036] In order to make the purpose, technical solution and advantages of the application clearer, the application will be further described in detail below in conjunction with the accompanying drawings.

[0037] A method for sorting LED wafers provided by the application comprises the following steps:

[0038] S1. Dividing the LED wafer into several blocks, the LED grains on the blocks are divided into reserved grains and grabbing grains, the optoelectronic performance and number of grains of the reserved grains meet the preset requirements, so The photoelectric performance and the number of grains of the captured grains do not meet the preset requirements, wherein the number of grains of the reserved grains is larger than the number of grains of the grasped grains, and the number of grains of the reserved grains on the same block The optoelectronic properties of the grains are at the same level, and the optoelectronic properties of the retained grains on different blocks are...

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Abstract

The invention discloses an LED wafer sorting method which comprises the steps that an LED wafer is divided into a plurality of blocks, LED crystal grains on the blocks are divided into reserved crystal grains and grabbed crystal grains, the photoelectric performance of the reserved crystal grains and the number of the crystal grains meet preset requirements, and the photoelectric performance of the grabbed crystal grains and the number of the crystal grains do not meet the preset requirements. The number of the reserved crystal grains is larger than that of the grabbed crystal grains, the photoelectric properties of the reserved crystal grains on the same block are in the same grade, and the photoelectric properties of the reserved crystal grains on different blocks are in different grades; the grabbed crystal grains on the blocks are removed; and transferring the reserved crystal grains on the blocks to form a finished square sheet. The device is high in sorting efficiency, low in cost and suitable for large-scale production.

Description

technical field [0001] The present application relates to the technical field of light emitting diodes, in particular to a method for sorting LED wafers. Background technique [0002] After the LED wafer completes the electrical and optical characteristic tests, the sorting equipment grabs the grains on the LED wafer to the new blue film one by one according to the grade of the grains to be sorted. Specifically, the grains to be sorted are also placed on the blue film. When the sorting equipment is sorting, it needs a thimble to push up the grains to be sorted on the blue film, and then the grains to be sorted will be lifted by the grabbing mechanism. Grabbed onto a new blue film. Among them, the thimble only pushes one grain at a time. [0003] However, as the size of the grains becomes smaller and smaller, the number of grains on a general wafer can be as high as 150,000, and the sorting equipment needs 6-7 hours to complete the sorting, which is not conducive to large-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B07C5/342B07C5/344
CPCB07C5/342B07C5/344
Inventor 黎银英邝浩彬陈桂飞陆绍坚
Owner FOSHAN NATIONSTAR SEMICON