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Preparation method of cob ceramic substrate and cob light source

A technology of ceramic substrate and alumina ceramic, which is applied in the field of COB ceramic substrate preparation and COB light source, can solve problems such as low cutting efficiency, and achieve the effects of low cost, improved production efficiency and reduced cost

Active Publication Date: 2016-09-14
GUANGZHOU LEDTEEN OPTOELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a COB ceramic substrate preparation method, which can solve the problem of low cutting efficiency

Method used

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  • Preparation method of cob ceramic substrate and cob light source
  • Preparation method of cob ceramic substrate and cob light source
  • Preparation method of cob ceramic substrate and cob light source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] like figure 1 Shown, a kind of COB ceramic substrate preparation method, it comprises the following steps:

[0033] Step S101 , injecting the alumina mixed slurry into the casting machine, selecting an appropriate blade height and casting speed according to the required thickness of the substrate to obtain a cast green sheet, and then drying and stripping the cast green sheet.

[0034] Wherein, the preparation process of the alumina mixed slurry is:

[0035] Mix alumina powder with a purity greater than 98.6%, deionized water and dispersant in a ratio of 1:1:0.012 and ball mill for 36 hours to obtain a slurry. The slurry after mixing in this ratio has a moderate viscosity and is suitable for casting machines Casting; the dispersion agent of the present embodiment preferably adopts polyacrylic acid;

[0036] In order to ensure the best dispersion effect of polyacrylic acid and achieve the best stability of the slurry, it is necessary to add ammonia water to adjust the ...

Embodiment 2

[0048] The difference between the present embodiment and the first embodiment lies in the step of punching the cast blank by using the punching die. Specific as Figure 4 shown.

[0049] A method for preparing a COB ceramic substrate, comprising the following steps:

[0050] Step S201, injecting the alumina mixed slurry into a casting machine to obtain a casting green sheet.

[0051] Step S202 , punching the casting green sheet by using a punching die to obtain continuous sheets. The connected sheet refers to a plurality of green sheets connected together.

[0052] combine Figure 5 and Image 6 As shown, the V-cut pre-cutting process can be performed between the sheets in the continuous sheet, and the V-cut depth of the V-cut pre-cutting process is 70% of the thickness of the cast green sheet 100 . That is, a V-shaped crack is cut on the cast green sheet 100 to form a cutting line 10 with a cutting depth of 70% of its thickness. A plurality of separate COB ceramic subs...

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Abstract

The invention relates to a COB (Chip On Board) ceramic substrate preparation method and a COB light source. The method comprises the steps: injecting alumina mixed slurry into a casting machine, so as to obtain a cast blank sheet; blanking the cast blank sheet by adopting a blanking die, so as to obtain single or contiguous sheets; carrying out gluing and sintering treatment on the single or contiguous sheets, so as to obtain alumina ceramic original boards; and printing circuit patterns on the alumina ceramic original boards, thereby obtaining COB ceramic substrates. Single or contiguous COB ceramic substrates can be directly obtained through blanking by the die, a laser cutting machine is not required to be adopted to cut and perforate the ceramic substrates, the internal structural damage to the ceramic substrates caused by laser energy is avoided, and residual leftover materials generated by casting and blanking can be recycled, so that the further increase of production efficiency and the further reduction of cost are facilitated.

Description

technical field [0001] The invention relates to a preparation method and structure of a COB substrate. Background technique [0002] Ceramic COB light sources use ceramic substrates for heat dissipation to ensure the luminous effect and service life of LED chips. However, traditional ceramic substrates need to be cut by laser. Laser cutting has low efficiency, difficult drilling, and easy damage to the substrate, which is not conducive to mass production . Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing a COB ceramic substrate, which can solve the problem of low cutting efficiency. [0004] In order to achieve the above object, the technical scheme adopted in the present invention is as follows: [0005] A method for preparing a COB ceramic substrate, comprising the following steps: [0006] Step 1, injecting the alumina mixed slurry into a tape casting machine to obtain a tape casting green sheet; [0007] S...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/622C04B41/81
Inventor 黄玉娇苏佳槟高艳春夏雪松
Owner GUANGZHOU LEDTEEN OPTOELECTRONICS CO LTD
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