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Preparation method of sapphire fingerprint recognition panel

A fingerprint recognition and sapphire technology, applied in stone processing equipment, character and pattern recognition, chemical instruments and methods, etc., can solve the problems of poor quality of fingerprint recognition panels and low yield, and achieve complete wafer structure, high yield, high productivity

Active Publication Date: 2017-01-25
清远惠晶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the fingerprint identification panel of this invention still has the problems of poor quality and low yield

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation method of the sapphire fingerprint recognition panel of the present embodiment specifically includes the following steps:

[0035] Step 1, crystal growth; put pure Al in the crucible of crystal growth furnace 2 o 3 Raw material, above the crucible is provided with a rotatable and lifting lifting rod, and the lower end of the lifting rod is clamped with a seed crystal with a C crystal orientation; the crystal growth furnace is vacuumed and a protective gas is introduced, and the temperature is raised to 2200 ° C, so that the Al 2 o 3 Melt, control the liquid surface temperature of the melt to 2055°C, place the seed crystal in Al 2 o 3 The upper surface of the melt is in contact with the melt for 1 hour; after the seed crystal is fully wetted with the melt, the seed crystal is pulled and rotated to achieve necking-shoulder expansion-equal diameter growth; in the necking stage, control The liquid surface temperature of the melt is 2050°C, the seed cryst...

Embodiment 2

[0047] The preparation method of the sapphire fingerprint recognition panel of the present embodiment specifically includes the following steps:

[0048] Step 1, crystal growth; put pure Al in the crucible of crystal growth furnace 2 o 3 Raw material, above the crucible is provided with a rotatable and lifting lifting rod, and the lower end of the lifting rod is clamped with a seed crystal with a C crystal orientation; the crystal growth furnace is vacuumed and a protective gas is introduced, and the temperature is raised to 2100 ° C, so that the Al 2 o 3 Melt, control the liquid surface temperature of the melt to 2055°C, place the seed crystal in Al 2 o 3 The upper surface of the melt makes it contact with the melt for 0.5h; after the seed crystal and the melt are fully wetted, the seed crystal is pulled and rotated to achieve necking-shoulder expansion-equal diameter growth; in the necking stage, Control the liquid surface temperature of the melt to 2050°C, pull the seed...

Embodiment 3

[0060] The preparation method of the sapphire fingerprint recognition panel of the present embodiment specifically includes the following steps:

[0061] Step 1, crystal growth; put pure Al in the crucible of crystal growth furnace 2 o 3 Raw material, above the crucible is provided with a rotatable and lifting lifting rod, and the lower end of the lifting rod is clamped with a seed crystal with a C crystal orientation; the crystal growth furnace is vacuumed and a protective gas is introduced, and the temperature is raised to 2150 ° C, so that the Al 2 o 3 Melt, control the liquid surface temperature of the melt to 2055°C, place the seed crystal in Al 2 o 3 The upper surface of the melt is in contact with the melt for 1 hour; after the seed crystal is fully wetted with the melt, the seed crystal is pulled and rotated to achieve necking-shoulder expansion-equal diameter growth; in the necking stage, control The liquid surface temperature of the melt is 2050°C, the seed cryst...

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Abstract

The invention relates to a manufacturing method for a sapphire fingerprint recognition panel. The manufacturing method comprises the specific steps of crystal growth, crystal bar drawing, crystal cutting, laser wafer taking, grinding, chamfering, annealing, double-face polishing, film plating, ink smearing, hot drying and the like. According to the manufacturing method for the sapphire fingerprint recognition panel, the quality of finished wafers is high, the rejection rate is low, and the production efficiency is high.

Description

technical field [0001] The invention relates to a preparation method of a sapphire sheet, in particular to a preparation method of a sapphire fingerprint recognition panel, which belongs to the technical field of sapphire processing. Background technique [0002] Fingerprint identification technology is to match a person with his fingerprint, and his real identity can be verified by comparing his fingerprint with the pre-saved fingerprint. Obtaining a good fingerprint image is a very complicated problem. Because the fingerprint used for measurement is only a relatively small piece of epidermis, the fingerprint collection device should have a good enough resolution to obtain the details of the fingerprint, which places high requirements on the scanning panel of the fingerprint recognition machine. [0003] With the advancement of technology, the fingerprint scanning panel made of sapphire is more and more widely used. Sapphire has very good thermal properties, excellent ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28D5/00B28D5/04B24B1/00B24B37/04B24B37/08C09K3/14C30B29/20C30B15/20C30B33/02B23K26/38G06K9/00
Inventor 苏凤坚刘俊郝正平
Owner 清远惠晶科技有限公司
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