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Technological method for solving inconsistent ink color of glue coated on surface of mini LED COB (Chip On Board)

A process method and ink color technology, applied in the direction of semiconductor devices, electrical components, circuits, etc., can solve the problems of affecting the light output effect of mini LED, poor glue injection method, inconsistent ink color on the surface, etc., achieve broad market application prospects, and eliminate chip string light Problem, solve the effect of ink color inconsistency

Pending Publication Date: 2022-05-27
JIANGSU LUOHUA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional miniLED COB glue is inconsistent due to the material (large secondary fluidity before curing), equipment (relatively high mold temperature, poor glue injection method), and the difference in chip thickness, resulting in inconsistent ink color on the surface after curing
[0003] The improvement in the industry generally adopts conical spraying. Conical spraying will cover circularly, resulting in uneven overlap, uneven surface, and different light and dark after spraying, and inconsistent ink colors, which will affect the light output effect of miniLED. Therefore, we propose a solution for miniLED COB surface coating. Process method of inconsistent ink color

Method used

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  • Technological method for solving inconsistent ink color of glue coated on surface of mini LED COB (Chip On Board)
  • Technological method for solving inconsistent ink color of glue coated on surface of mini LED COB (Chip On Board)
  • Technological method for solving inconsistent ink color of glue coated on surface of mini LED COB (Chip On Board)

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Embodiment 1

[0033] as Figure 1-4 As shown, a process method to solve the inconsistency of the surface of mini LED COB coated ink color, wherein: the solution of the mini LED COB surface coated ink color inconsistency process method using the following steps:

[0034] Step 1, solid crystal: the RGB tricolor chip 2 is successively glued to the designated area on the PCB board 1, and the RGB tricolor chip 2 of the solid crystal does not contact each other, and there is a certain gap in the diameter of the adjacent RGB tricolor chip 2;

[0035] Step 2, coating printing: the glue 3 with the usable yellow light process is filled on the outer surface of the RGB tricolor chip 2 by the coating printing method;

[0036]Step 3, string light elimination: the RGB tricolor chip 2 above the corresponding position through the initial baking, exposure, development, post-baking, glue curing, so that the end face of glue 3 flat, to obtain the product, RGB tricolor chip 2 around the uniform filling with glue 3; ...

Embodiment 2

[0040] as Figure 1-2 and Figure 5-6 As shown, a process method to solve the inconsistency of the surface coating ink color of mini LED COB, which is characterized in that: the process method of solving the inconsistency of the surface of the mini LED COB coated ink color can also adopt the following steps:

[0041] Step 1, solid crystal: the RGB tricolor chip 2 is glued to the designated area on the PCB board 1 in turn, the solid crystal RGB tricolor chip 2 does not contact each other, and the adjacent RGB tricolor chip 2 diameter has a certain gap;

[0042] Step 2: Dispense: Glue 3 dots with a usable yellow light process are applied to the outer surface of RGB tricolor chip 2;

[0043] Step three, grinding: the glue 3 above the upper end surface of the RGB tricolor chip 2 is smoothed by grinding, so that the filling height of the glue 3 is the same as the height of the RGB tricolor chip 2, and the product is obtained, and the four sides of the RGB tricolor chip 2 are evenly fille...

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Abstract

The invention discloses a process method for solving the problem of inconsistent ink color of glue coated on the surface of a mini LED COB (Chip On Board). The process method comprises the following steps: sequentially bonding RGB (Red, Green, Blue) three-color chips on a designated area on a PCB (Printed Circuit Board); the outer surface of the RGB three-color chip is filled with glue capable of being processed by yellow light through a coating printing method, or the outer surface of the RGB three-color chip is dispensed with the glue capable of being processed by the yellow light; the corresponding positions on the RGB three-color chip are subjected to primary baking, exposure, development, post-baking and glue curing, so that the end face of glue is flat, or the glue higher than the upper end face of the RGB three-color chip is ground to be flat in a grinding mode, the filling height of the glue is the same as the height of the RGB three-color chip, and a product is obtained; and black colloid with required light transmittance is sprayed by adopting a wide opening. The technological method for solving the problem of inconsistent ink color of the mini LED COB surface coating glue is simple, the problem of inconsistent ink color is effectively solved, the difficulty coefficient is low, operation is convenient and fast, and the technological method has wide market application prospects.

Description

Technical field [0001] The present invention relates to the field of mini LED COB surface coating technology, particularly to a process method to solve the inconsistency of the ink color of mini LED COB surface coating. Background [0002] Traditional miniLED COB coating due to the material (large secondary fluidity before curing), equipment (relatively high mold temperature, poor glue injection method), and chip thickness differences resulting in inconsistent surface ink color after curing. [0003] The industry improvement generally adopts cone spraying, cone spraying will be circular coverage, resulting in different overlaps, uneven surfaces, and different shades after spraying, ink color is inconsistent, affecting the miniLED light effect, therefore, we proposed a process method to solve the inconsistency of the ink color of the surface of miniLED COB. Contents of the Invention [0004] The main object of the present invention is to provide a process method to solve the inco...

Claims

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Application Information

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IPC IPC(8): H01L33/48H01L33/52H01L33/58H01L33/62
CPCH01L33/48H01L33/52H01L33/58H01L33/62H01L2933/0033H01L2933/005H01L2933/0058H01L2933/0066
Inventor 罗雪方张亮李雍陈文娟瞿澄
Owner JIANGSU LUOHUA NEW MATERIAL