A-directional sapphire mobile phone cover plate polishing solution and preparation method thereof

A technology for sapphire and mobile phone covers, applied in polishing compositions containing abrasives, etc., can solve the problems of low removal rate and poor surface quality, and achieve the effect of eliminating scratches

Inactive Publication Date: 2015-08-12
深圳杰明纳微电子科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an A-direction sapphire mobile phone cover polishing liquid and its preparation method to solve technical problems such as low removal rate and poor surface quality in the existing polishing process

Method used

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  • A-directional sapphire mobile phone cover plate polishing solution and preparation method thereof
  • A-directional sapphire mobile phone cover plate polishing solution and preparation method thereof
  • A-directional sapphire mobile phone cover plate polishing solution and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0030] Under the action of mechanical stirring, the silica sol was added into deionized water to disperse and dilute, then sequentially added polishing aids, complexing agents, surfactants, and defoamers, and used a pH regulator to adjust the pH value of the polishing solution, specifically See Table 1 for the ratio.

[0031] Table 1. Each group distribution ratio in embodiment 1-5

[0032]

[0033] Use the above polishing solution to perform chemical mechanical polishing on the A-direction sapphire mobile phone cover. The process conditions are shown in Table 2:

[0034] Table 2. The processing conditions of embodiment and comparative example

[0035] polisher

HAMAI-16B (double-sided)

Disk Size(mm)

1160

polishing pad

SUBA 800

speed(rpm)

35

[0036] Pressure (g / cm 2 )

300

Polishing liquid flow rate (L / min)

1

Polishing time (min)

150

Workpiece to be processed

5.5 inch sapp...

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Abstract

The invention relates to an A-directional sapphire mobile phone cover plate polishing solution and a preparation method thereof. The polishing solution is a water fluid suspension and comprises ingredients shown in the following description according to a mass percent. The A-directional sapphire mobile phone cover plate polishing solution polishes an A-directional sapphire mobile phone cover plate so that surface roughness of the A-directional sapphire mobile phone cover plate is less 0.3nm, a polishing rate is more than 2 micrometers per hour, and scratch, orange-peel and concave-convex surface defects are effectively eliminated.

Description

technical field [0001] The invention relates to a double-sided polishing technology for a sapphire mobile phone cover plate, and more specifically, relates to an A-direction sapphire mobile phone cover plate polishing solution and a preparation method. Background technique [0002] Sapphire crystals can be divided into A-direction sapphire crystals and C-direction sapphire crystals because of their different growth directions (along the C-axis or A-axis). The quality is much higher than that of the sapphire crystal grown in the C direction, so if the existing C direction sapphire mobile phone cover polishing liquid is used for polishing the A direction sapphire mobile phone cover, the polishing rate is low and the surface quality of the mobile phone cover is not good. [0003] At present, Apple in the United States only applies the A-direction sapphire chip to the rear camera lens and fingerprint chip of the Apple mobile phone. In the future, Apple is likely to use A-direct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09G1/02
CPCC09G1/02
Inventor 李维民熊伟
Owner 深圳杰明纳微电子科技有限公司
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