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Hoya Assigned Patent

Substrate for magnetic disk and disk

Hoya Corporation, Tokyo, Japan, has been assigned a patent (11640833) developed by Eda, Shinjin Hung Yen Province, Vietnam, for substrate for magnetic disk and magnetic disk.

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A disk-shaped substrate for a magnetic disk has a diameter D of 85 mm or more and a thickness T of 0.6 mm or less, and a material of the substrate has a Young’s modulus E of 90 GPa or more.

The patent application was filed on 2019-08-07 (17/266079).

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