Substrate for a magnetic disk and process for its production

United States of America Patent

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May 15, 1990
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N/A
app pub date
Sep 28, 1988
filing date
Sep 30, 1987

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Expired

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Abstract

A substrate for a magnetic disk, having an anodized aluminum coating layer with pores widened by chemical dissolution so that the total area of pores is from 20 to 80% of the entire surface area.

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Patent Owner(s)

Patent Owner	Address
TSUYA NOBORU	SENDAI

International Classification(s)

G11B:INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BET....

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[Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Takahashi, Toshiro	350-29 Ose-cho, Hamamatsu-shi, Shizuoka-ken, JP	75	856
Tokushima, Tadao	1-18-1 Izumi, Hamamatsu-shi, Shizuoka-ken, JP	20	198
Tsuya, Noboru	3-13-11 Hachimanyama, Setagaya-ku, Tokyo, JP	15	268

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Substrate for a magnetic disk and process for its production

Number of patents in Portfolio can not be more than 2000

United States of America Patent

07250088

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PATENT NO	4925738
SERIAL NO	07250088
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07250088

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