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Preparation method of sapphire fingerprint identification panel

A fingerprint identification and sapphire technology, which is applied in character and pattern recognition, acquisition/organization of fingerprints/palmprints, instruments, etc., can solve the problems of low yield rate and poor quality of fingerprint identification panel, and achieve high yield rate and complete chip structure , the effect of reducing production costs

Inactive Publication Date: 2015-12-16
江苏苏创光学器材有限公司
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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 preparation method of a sapphire fingerprint identification panel, which specifically comprises the working procedures of crystal growth, crystal extracting, crystal cutting, laser slice taking, grinding, chamfering, annealing, double-sided polishing, film coating, ink printing, baking and the like. The preparation method of the sapphire fingerprint identification panel is high in slice forming quality, low in rejection rate and high in production efficiency.

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 Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/1318
Inventor 苏凤坚刘俊郝正平
Owner 江苏苏创光学器材有限公司
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