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A processing technology of ultra-thin ceramic fingerprint recognition sheet

A processing technology and fingerprint recognition technology, applied in the field of ultra-thin ceramic product processing, which can solve the problems of large demand for manpower and material resources and complex processing.

Active Publication Date: 2020-08-04
LENS TECH CHANGSHA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this processing method, pads are added, and the sapphire flakes need to be fixed with wax during processing, which is complicated to process and requires a lot of manpower and material resources.

Method used

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  • A processing technology of ultra-thin ceramic fingerprint recognition sheet
  • A processing technology of ultra-thin ceramic fingerprint recognition sheet
  • A processing technology of ultra-thin ceramic fingerprint recognition sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0029] (1) Choose a ceramic fine rod with a diameter of 51.7 mm, and use a diamond wire saw to cut the incoming material to obtain a ceramic sheet with a thickness of 0.26 mm and a diameter of 51.7 mm. In this step, the specific wire cutting process parameters are:

[0030]

[0031] (2) Use a double-sided coarse grinder to rough grind the cut ceramic sheet with a boron carbide abrasive with a particle size of 30 μm to obtain a ceramic sheet with a thickness of 0.21±0.01 mm. In this step, the coarse grinding process includes 5 stages, and the specific coarse grinding process parameters are:

[0032]

[0033] (3) Chamfer the edges of the upper and lower surfaces of the roughly ground ceramic sheet with a grinding wheel rod or a grinding wheel of CNC or profiling equipment, and the size of the chamfering edge is 0.35mm.

[0034] (4) Use a polishing machine to perform rough polishing on one side of the ceramic sheet that has been chamfered. After rough polishing, the thicknes...

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Abstract

The invention provides a processing technique of ultrathin ceramic fingerprint identification pieces. The processing technique comprises the following steps that (1) ceramic crystal bars are cut through a multi-wire diamond wire saw according to the thickness requirement, and thus ceramic pieces are formed; (2) the ceramic pieces obtained in cutting are placed in a polishing jig positioning mold cavity of a double-face rough grinding machine so as to roughly grind the upper surfaces and the lower surfaces of the ceramic pieces simultaneously; (3) the roughly-ground ceramic pieces are placed ina polishing jig positioning mold cavity of a polishing machine so as to roughly polish the surfaces of the ceramic pieces; (4) the roughly-polished ceramic pieces are placed in a polishing jig positioning mold cavity of a double-face polishing machine so as to finely polish the upper surfaces and the lower surfaces of the ceramic pieces, and thus finished ceramic piece products are formed; (5) the polished finished ceramic piece products are cut into the ceramic fingerprint identification pieces of the required size through lasers. Processing work of the ceramic fingerprint identification pieces can be completed rapidly with the high quality, defects of cracking, scratching and the like are not liable to occur, high-quality and efficient processing of the ultrathin ceramic fingerprint identification products is achieved.

Description

technical field [0001] The invention relates to the technical field of processing ultra-thin ceramic products, in particular to a processing technology of an ultra-thin ceramic fingerprint identification sheet. Background technique [0002] At present, the mainstream fingerprint identification sheet material is sapphire, and the sapphire fingerprint identification sheet has the disadvantages of high cost and weak drop resistance. Ceramics have good wear resistance, and the hardness is second only to diamond, reaching Mohs 9. At the same time, the compactness of ceramics makes it stronger than tempered glass. In addition, it has many types, rich colors, and a dielectric constant of 10-15. , After polishing, the finish is good. The above characteristics make ceramic fingerprint identification chips very suitable for high-end watches, mobile phones and other electronic products, but the ceramic material is hard and brittle, difficult to process, and easy to cause cracking and d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B1/00B24B27/06B24B7/17B24B7/22B24B37/08B28D1/06
CPCB24B1/00B24B7/17B24B7/22B24B27/0633B24B37/08B28D1/06
Inventor 周群飞饶桥兵梁成华
Owner LENS TECH CHANGSHA
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