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US 2014/0272298 A1Published application
Layered coatings for sapphire substrate
AssigneeApple Inc.
InventorsDale N. Memering, Christopher D. Prest, Matthew Rogers
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Abstract
A layered coating for a sapphire component is described herein. The sapphire component comprises one or more layers of alumina adhered to the surface of a sapphire member. At least the first layer of alumina adheres to the surface of the sapphire member filling all defects in the surface forming a pristine new layer that also provides isolation from damage.
Claims25
A window comprising:
- a sapphire substrate comprising a first surface and a second surface having a number of surface defects;
- and
- a first layer adhered to the first surface and the plurality of surface defects on the first surface, said first layer formed of one or alumina or silicon oxynitride;
- wherein the first layer fills the surface defects.
1 more element
A method comprising:
- obtaining a sapphire substrate having an upper surface and a lower surface;
- preconditioning at least one of the upper surface and lower surface of the sapphire substrate;
- and
- depositing one of xilicon oxynitrdie or alumina as a first material on the sapphire substrate, thereby forming a first layer,
- wherein the first layer has at least one different material characteristic than the sapphire substrate.
2 more elements
A method comprising:
- applying a sapphire substrate to a device, wherein the sapphire substrate includes a first surface and a second surface with a first backing material applied to the second surface;
- applying a second substrate to the device;
- applying a color matching material to the second substrate, wherein the color matching material selected to match the appearance of the first backing material;
- and
- lowering the index of refraction of the sapphire substrate by applying a first coating to the first surface of the sapphire substrate, wherein the first coating has a Mohs hardness greater than 3.4.
2 more elements
Dependencies are inferred from the claim text.