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Special grinding fluid for synthetic sapphire camera lens

A sapphire and grinding liquid technology, applied in the field of grinding liquid, can solve the problems such as the smooth surface effect cannot meet the technical requirements, the dispersion effect of the dispersant is poor, the cycle life is short, etc., and the grinding processing efficiency, suspension stability, and cycle life can be improved. long effect

Inactive Publication Date: 2017-08-18
东莞市淦宏信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dispersion effect of the dispersant is poor, it is easy to precipitate, the grinding efficiency is not high, and the cycle life is short
Moreover, during the grinding process, the liquid film on the grinding disc is unevenly dispersed, which can easily cause scratches on the wafer. The smooth surface effect of grinding often cannot meet the technical requirements, and the yield rate is low, so it is necessary to improve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A kind of special lapping liquid of artificial sapphire camera lens, according to the total weight percentage of lapping liquid, sapphire lapping liquid is made of 20~30% abrasive, 10~15% suspending agent, 5~10% cutting agent, 3~5% accelerator, It is composed of 1-3% antioxidant and the balance of water, and its pH value is 7-8.

[0012] Abrasives, including two kinds of boron carbide, silicon carbide, nano-sized zirconia or corundum, the weight ratio is 1:1.

[0013] Suspending agent, according to the percentage by weight of each component in the suspending agent, 20-30% talcum powder, 10-15% triethanolamine, 3-5% silicone gel, 5-10% epoxy resin, 10-15% diatom mud, the balance is mineral oil.

[0014] Cutting agent, according to the weight percentage of each component in the cutting agent, 5-10% polyurethane, 5-10% phthalate, 0.1-0.5% nano-silver powder, 1-10% 3% polymer surface penetrating agent and 1-3% organosiloxane foam suppressor, the balance is methyl silicone...

Embodiment 2

[0019] A kind of special lapping liquid of artificial sapphire camera lens, according to the total weight percentage of lapping liquid, sapphire lapping liquid is made of 22~24% abrasive, 11~13% suspending agent, 6~7% cutting agent, 3~5% accelerator, It is composed of 1-3% antioxidant and the balance of water, and its pH value is 7-8.

[0020] The grinding agent comprises 10-20% of boron carbide and 20-30% of nano-sized zirconia according to the weight percentage of each component in the grinding agent, and the balance is corundum.

[0021] Suspending agent, according to the percentage by weight of each component in the suspending agent, 20-22% talcum powder, 10-11% triethanolamine, 3-5% silica gel, 5-6% epoxy resin, 10-11% diatom mud, the balance is mineral oil.

[0022] Cutting agent, according to the weight percentage of each component in the cutting agent, 5-7% polyurethane, 5-6% phthalate, 1-2% polymer surface penetrating agent And 1-2% organosiloxane antifoam agent, th...

Embodiment 3

[0027] A kind of special lapping liquid of artificial sapphire camera lens, according to the total weight percentage of lapping liquid, sapphire lapping liquid is made of 26~28% abrasive, 13~15% suspending agent, 6~8% cutting agent, 3~5% accelerator, It is composed of 1-3% antioxidant and the balance of water, and its pH value is 7-8.

[0028] The grinding agent comprises 10-20% of boron carbide and 20-30% of nano-sized zirconia according to the weight percentage of each component in the grinding agent, and the balance is corundum.

[0029] Suspending agent, according to the percentage by weight of each component in the suspending agent, 28-29% talcum powder, 13-14% triethanolamine, 4-5% silicone gel, 8-9% epoxy resin, 12-13% diatom mud, the balance is mineral oil.

[0030] Cutting agent, according to the weight percentage of each component in the cutting agent, 7-8% polyurethane, 6-7% phthalate, 0.1-0.5% nano-silver powder, 1-8% 3% polymer surface penetrating agent and 1-3%...

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Abstract

The invention discloses a special grinding fluid for a synthetic sapphire camera lens. The sapphire grinding fluid comprises the following components in percentage by weight: 20-30% of a grinding agent, 10-15% of a suspending agent, 5-10% of a cutting agent, 3-5% of an accelerator and the balance of water; and the pH value of the grinding fluid is 7 to 8. The grinding fluid is evenly dispersed, the grinding agent is suspended stably and is difficultly precipitated at the bottom of a machine in recycling use during grinding process, and a grinding fluid membrane can be better adhered to a grinding disc so as to prevent a wafer from being in direct contact with the grinding disc and causing scratch, so that the grinding efficiency can be improved, the yield of ground products is increased, throwing is difficultly caused due to an overlarge rotating speed, in addition, the removal rate of the grinding fluid is high and the recycling service life is long.

Description

technical field [0001] The invention relates to the technical field of grinding fluid, in particular to a special grinding fluid for artificial sapphire camera lenses. Background technique [0002] In the prior art, in various electronic products equipped with cameras such as mobile phones, tablet computers, and cameras, most of the lenses in the cameras are made of artificial sapphire camera lenses. The artificial sapphire camera lenses need to be ground, and the grinding process needs to continuously inject special of grinding liquid. The artificial sapphire camera lens has very high technical requirements for its surface quality, and the quality of the grinding fluid is the main factor affecting the grinding effect. At present, the grinding fluid used for grinding sapphire mainly uses large particle boron carbide, silicon carbide or diamond powder as Abrasive, then add a certain proportion of water and dispersant composition. The dispersion effect of the dispersant is p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14C09G1/02
CPCC09K3/1463C09G1/02
Inventor 简顺年
Owner 东莞市淦宏信息科技有限公司
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