US Patent No: 4,820,584
Number of patents in Portfolio can not be more than 2000
Magnetic recording medium and method of manufacturing the same
Stats
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Apr 11, 1989
Issued date -
Jun 10, 1987
filing date -
07/060,388
serial no -
Expired
status
Importance
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Abstract
A magnetic recording medium according to the present invention comprises a non-magnetic substrate, a magnetic recording layer formed on the non-magnetic substrate, and a lubricant layer containing carbon as a major component and formed on the magnetic recording layer. At least one element selected from a group consisting of hydrogen and a halogen is bonded to the carbon, as the major component of the lubricant layer, in a surface region of the lubricant layer. In the formation of the lubricant layer, initially only an inert gas is introduced as an atmospheric gas around a carbon target at the beginning of sputtering, so that the carbon target is sputtered by cations of the inert gas. Thereafter, a gas containing at least one of hydrogen and a halogen is added to sputter the carbon target. Thus, a carbon-hydrogen atomic bond (C-H bond) and/or a carbon-halogen atomic bond (C-X bond; X is a halogen element) are formed on the surface region of the lubricant layer.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,664,976 Magnetic recording medium comprising a protective carbon nitride layer on the surface thereof | 16 | 1985 | |
| 4,680,218 Magnetic recording medium | 6 | 1985 | |
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| 4,411,963 Thin film recording and method of making | 72 | 1981 | |
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| 4,419,404 Magnetic recording media and process of producing them | 45 | 1982 | |
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| 4,647,494 Silicon/carbon protection of metallic magnetic structures | 118 | 1985 | |
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| 4,636,435 Polymeric thin film, process for producing the same and products containing said thin film | 22 | 1984 | |
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| 4,552,820 Disc media | 47 | 1984 | |