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Sapphire and glass laminates using gradient layers

A gradient layer and sapphire technology, applied in the direction of glass/slag layered products, coatings, applications, etc., can solve the problems of reducing glass fracture strength and unfavorable reliability

Active Publication Date: 2021-06-22
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, strengthened glass is inherently softer than some other material choices, which can lead to the formation of scratches on the glass surface, which is detrimental both to user perception and to the reliability of the cover glass, as scratches can reduce the breaking strength of the glass

Method used

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  • Sapphire and glass laminates using gradient layers
  • Sapphire and glass laminates using gradient layers
  • Sapphire and glass laminates using gradient layers

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Embodiment Construction

[0026] Some embodiments of the present disclosure relate to cover glasses that can be used in electronic devices such as smartphones and tablets. While the present disclosure can be used in a wide variety of configurations, some embodiments of the present disclosure are particularly useful for cover glasses made from laminates in which sheets of glass and sapphire are bonded together through a gradient layer that runs from the sapphire sheet to Mainly Al 2 o 3 The composition of the glass sheet is mainly SiO 2 composition. Laminates of glass and sapphire can exhibit improved optical performance and reliability compared to conventional cover glass configurations.

[0027] For example, in some embodiments, a graded layer is deposited on one surface of a sapphire wafer. The graded layer is amorphous and predominantly Al from the sapphire sheet2 o 3 The composition of the opposite surface is mainly SiO 2 composition. A first annealing process is performed which chemically b...

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Abstract

The present invention relates to laminating a sapphire sheet to a glass sheet through a gradient layer, the gradient layer being predominantly Al from the sapphire sheet 2 O 3 The composition of the transition to the glass flake is predominantly SiO 2 composition. The gradient layer is chemically bonded to both the sapphire sheet and the glass sheet and has no apparent interface.

Description

[0001] Cross References to Other Applications [0002] This patent application claims U.S. Provisional Patent Application Serial No. 62 / 399,089 filed September 23, 2016 for "SAPPHIRE AND GLASS LAMINATES WITH A GRADIENT LAYER" and "SAPPHIRE AND GLASS LAMINATES WITH A GRADIENT LAYER" filed September 21, 2017 LAYER" of U.S. Patent Application Serial No. 15 / 711,851, both of which are hereby incorporated by reference in their entirety for all purposes. technical field [0003] The embodiments generally relate to electronic devices employing a transparent cover glass disposed over a display screen. The transparent cover glass forms the exterior part of the housing of the electronic device and protects the display screen from damage. More specifically, embodiments of the present invention relate to cover glasses formed by laminating a sapphire sheet to a glass sheet with a gradient layer that is predominantly Al from the sapphire sheet 2 o 3 The composition of the glass sheet is m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B17/06B32B7/10B32B9/00B32B5/14
CPCB32B9/005B32B17/06B32B2457/208B32B2307/412B32B2255/20B32B2307/704B32B2307/732B32B2571/00B32B9/04B32B2250/02B32B2307/584B32B7/022B32B5/145B32B7/10B32B15/20C03C3/125C30B29/20G06F3/0488
Inventor Q·A·S·阮D·N·米米林C·D·琼斯M·罗杰斯
Owner APPLE INC