Method of manufacturing substrate for information storage media

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United States of America Patent

PATENT NO 8603350
APP PUB NO 20110011833A1
SERIAL NO

12836238

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Abstract

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A manufacturing method is provided for manufacturing a substrate for information storage media having various properties that are demanded for a next generation of information storage media substrate purposes exemplified by perpendicular magnetic recording systems, etc., and above all, having high fracture toughness and a smooth surface at low cost. The method of manufacturing a substrate for information storage media includes a step of preparing glass material of a plate shape containing SiO2 component, Al2O3 component, and R′2O component, R′ being at least one selected from Li, Na, and K, and the step of lapping includes at least one sub-step of lapping the glass material with a diamond pad.

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Patent Owner(s)

Patent OwnerAddress
OHARA INC15-30 OYAMA 1-CHOME CHUO-KU SAGAMIHARA-SHI KANAGAWA 2525286

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Goto, Naoyuki Kanagawa, JP 78 1437
Yagi, Toshitaka Kanagawa, JP 39 404
Yamashita, Yutaka Kanagawa, JP 50 844

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