Preparation method of sapphire camera window

A camera and window technology, which is applied in the field of sapphire processing, can solve the problems affecting the quality and yield of windows, unreasonable process design, etc., and achieve the effects of stable viscosity and interface film properties, small deformation, and good wear resistance

Active Publication Date: 2021-09-21
JINGJING TECH (HUBEI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process design of this method is not reasonable enough, which will directly affect the quality and yield of the window

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] The preparation process of the sapphire camera window of the present embodiment includes the following steps:

[0035] Step 1, crystal growth; put pure Al in the crucible of crystal growth furnace 2 o 3 Raw materials, a rotatable and lifting lifting rod is provided above the crucible, and the lower end of the lifting rod is clamped with seed crystals with A crystal orientation, M crystal orientation or C crystal orientation; vacuumize the crystal growth furnace and pass in protective gas , heated up to 2200°C, so that 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 crystal is pulled up at a ...

Embodiment 2

[0047] The preparation process of the sapphire camera window of the present embodiment includes the following steps:

[0048] Step 1, crystal growth; put pure Al in the crucible of crystal growth furnace 2 o 3 Raw materials, a rotatable and lifting lifting rod is provided above the crucible, and the lower end of the lifting rod is clamped with seed crystals with A crystal orientation, M crystal orientation or C crystal orientation; vacuumize the crystal growth furnace and pass in protective gas , heated up 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 crystal upward a...

Embodiment 3

[0060] The preparation process of the sapphire camera window of the present embodiment includes the following steps:

[0061] Step 1, crystal growth; put pure Al in the crucible of crystal growth furnace 2 o 3 Raw materials, a rotatable and lifting lifting rod is provided above the crucible, and the lower end of the lifting rod is clamped with seed crystals with A crystal orientation, M crystal orientation or C crystal orientation; vacuumize the crystal growth furnace and pass in protective gas , heated up 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 crystal is pulled up a...

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Abstract

The invention relates to a method for preparing a sapphire camera window, the specific steps including crystal growth, crystal rod removal, crystal cutting, grinding, chamfering, annealing, double-sided polishing, laser slice removal, coating, ink coating and thermal drying; The camera window made by the invention has high film quality, low rejection rate and high 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 camera window sheet, and belongs to the technical field of sapphire processing. Background technique [0002] In modern life, mobile phones have become an indispensable electronic product for people, and most mobile phones have the function of taking pictures. The window covering the camera of a traditional mobile phone to protect the camera is made of glass, which has a Mohs hardness of only 7 and poor wear resistance. [0003] With the advancement of technology, glass mobile phone camera windows are gradually being replaced by sapphire materials. Sapphire has very good thermal properties, excellent electrical properties and dielectric properties, can maintain high strength at high temperatures, excellent thermal properties and transmittance, and is chemically resistant. The mobile phone camera window made of sapphire has high defin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/225B24B37/00B24B29/02B24B1/00
Inventor 苏凤坚刘俊郝正平
Owner JINGJING TECH (HUBEI) CO LTD
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