Electronic devices having transparent crystalline structures with antireflection coatings

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United States of America Patent

PATENT NO 10401535
APP PUB NO 20180024274A1
SERIAL NO

15617706

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Abstract

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A graded index antireflection layer may be formed on a transparent crystalline member such as a sapphire member. The graded index layer may include aluminum oxide and silicon oxide. The graded index layer may extend from a first surface at the transparent member to a second surface. The fraction of aluminum oxide in the graded index layer may be at a maximum at the first surface so that the index of refraction of the graded index layer at the first surface matches the index of refraction of the transparent member and may be at a minimum at the second surface so the index of refraction of the graded index layer is minimized at the second surface. The graded index layer may be annealed to form aluminum oxide nanocrystals in the graded index layer and to form a polycrystalline aluminum oxide adhesion layer at the first surface.

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Patent Owner(s)

Patent OwnerAddress
APPLE INCONE APPLE PARK WAY CUPERTINO CA 95014

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Matsuyuki, Naoto Tokyo, JP 64 461
Nguyen, Que Anh S San Jose, US 16 24
Rogers, Matthew S San Jose, US 63 284

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