A machining process of a large screen sapphire mobile-phone panel

A panel processing and sapphire technology, which is applied to the structure of telephones, telephone communications, instruments, etc., can solve the problems of poor yield rate, difficult processing, low efficiency, etc., to improve product strength, high processing efficiency, and good appearance quality Effect

Active Publication Date: 2015-04-22
LENS TECH CHANGSHA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is to provide a sapphire panel for the existing large screens (with a diagonal length of 3.0 to 6.0 inches, especially a screen of 4.5 to 6.0 inches) that is difficult to process, low in efficiency, and poor in yield. A large-screen sapphire mobile phone panel processing technology, especially the sapphire mobile phone panel that can process wear-resistant and scratch-resistant 2.5D arc edge contours

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Carry out 5.0-inch sapphire panel processing according to the following process steps in sequence.

[0025] 1) Cut the sapphire crystal block into a block with a diagonal size of 5 inches. The unilateral finishing allowance of the blank product: 28C (0.28mm), and the block is formed at a 4R angle;

[0026] Block cutting into flakes: Cut the product into flakes with wire cutting equipment;

[0027] Double-sided grinding and thinning with double-sided copper disc machine: Among them, the pressure per unit surface of the grinding machine and the upper disc is controlled at: 0.03kg / cm 2 , combined with boron carbide abrasives to thin the products after wire cutting. The thickness of the polished sapphire panel is controlled at ±0.01mm, TTV (thickness difference) ≤ 10um, WARP (warpage) ≤ 10um, Ra (surface roughness) 400nm;

[0028] Heat treatment 1: First, the temperature is raised from 25°C to 1650°C within 12 hours, then kept at 1650°C for 12 hours, and finally cooled to...

Embodiment 2

[0049] Carry out 6.0-inch sapphire panel processing according to the following process steps in sequence.

[0050] 1) The sapphire crystal block is formed, the sapphire is cut into a block with a diagonal size of 6.0 inches, the unilateral finishing allowance of the blank product: 28C (0.28mm), and the block is formed at a 4R angle;

[0051] Block cutting into pieces: cutting the product into pieces with wire cutting equipment;

[0052] Double-sided grinding and thinning: flatness: 0.05mm, the unit surface pressure of the grinding machine and the upper plate is controlled at 0.07kg / cm 2 , combined with boron carbide abrasives to thin the products after wire cutting. The thickness of the polished sapphire panel is controlled at: ±0.01mm; TTV (thickness difference): ≤10um; WARP (warpage): ≤10um, Ra: 800nm;

[0053] Heat treatment 1: Through high temperature, the residual thermal stress in the sapphire growth process is improved, which is beneficial to the subsequent product gr...

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PUM

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Abstract

The invention discloses a machining process of a large screen sapphire mobile-phone panel. The machining process of the large screen sapphire mobile-phone panel comprises the steps of 1) blanking sapphire of a bar material and forming a sheet material; 2) contouring a sapphire panel by adopting a CNC, machining hole sites at surfaces of the sapphire panel by adopting laser, and machining and shaping arc edges by adopting a diamond grinding wheel; 3) executing double-sided grinding and polishing on the sapphire panel by adopting a double-sided copper disc machine, to realize thinning; 4) executing double-sided polishing on the sapphire panel; and 5) executing film coating or silk-screen printing on the surfaces of the sapphire panel. According to the machining process of the large screen sapphire mobile-phone panel, the large screen panel is machined with respect to the material of sapphire, such that the machining efficiency is high, the appearance quality is good, and the steps of the process are practicable, thus being suitable for batch machining production by an enterprise.

Description

technical field [0001] The invention belongs to the technical field of processing touch panels, and relates to a processing technology for a 2.5D curved sapphire mobile phone panel. Background technique [0002] Artificially grown sapphire has a Mohs hardness of 9, which is second only to diamond. It has good physical and chemical properties and light transmittance. It is often used to make high-end consumer display screens, such as watches, mobile phones, and camera lenses. [0003] At present, mobile phone screens are mainly glass plates, which cannot meet people's personalized and diversified needs. The 2.5D mobile phone panel made of sapphire has a strong visual three-dimensional effect, is more beautiful and high-end, and overcomes the weaknesses of tempered glass used in mobile phone panels in the existing market, which are easy to explode and not resistant to scratches. However, while sapphire has high hardness and excellent scratch resistance, it also has the charac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041H04M1/02
CPCH04M1/0266
Inventor 周群飞饶桥兵龙春燕
Owner LENS TECH CHANGSHA
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