METHOD FOR COUPLING LUBRICANT TO MAGNETIC DISK

Japanese Patent JP3207829

B2

PROBLEM TO BE SOLVED: To provide a magnetic disk having zone groups which are separate in changed lubricant layer thicknesses in order to reduce the floating static friction on a magnetic disk surface.
SOLUTION: Protective film layers having the discriminated zone groups of different compositions are first sputtered on a disk surface by using discriminated masks under different sputtering conditions. The surfaces of the protective film layers are then uniformly coated with the lubricant layer. Part of the lubricant bonds to the protective film layers and forms the bonded lubricant layers and the thicknesses of the bonded lubricant layers correlate with the characteristics of the protective film layers and therefore the free lubricant layers having the zoned thicknesses are resultantly formed. The free lubricant layers are formed from the remaining lubricants. The zoned lubricants therefore reduce the floating static friction.

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Kiyama Hayashi
Yang Rensei
Hayashi Tetsuken
Hiroki Liang

JP26952799A

September 10, 2001

September 22, 1999

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Wakataka Technology Co., Ltd.

B05D3/10; C10M109/00; G11B5/725; G11B5/84; C10N40/18; (IPC1-7): G11B5/84; G11B5/725

JP6150300A
JP8227519A
JP836744A
JP1319128A
JP432021A
JP6295717A
JP63209025A
JP2239425A
JP1154378A

【文献】米国特許5650900(US,A)
【文献】米国特許6110330(US,A)

Mikio Hatta (3 outside)

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