Abstract
A magnetic disk includes a substrate on which a nonmagnetic metal layer, a magnetic layer, a carbon-based protection layer, an alcohol-based coupling layer, and a lubrication layer successively formed thereon. The lubrication layer contains a hydroxyl- or a carboxyl-modified compound as a lubricating material. The alcohol-based coupling layer contains, for example, lower alcohol as a main component and is deposited on the carbon-based protection layer, for example, by vapor deposition. The alcohol-based coupling layer may be replaced by a layer containing lower alcohol. The carbon-based protection layer may be deposited by plasma CVD.
Key facts
- Application
- 10/854,256Filed 27 May 2004
- Priority
- JP 2003-15086028 May 2003
- Published
- US 2004/0241380 A12 Dec 2004
- Granted
- 23 Jan 2007
- Term ends
- Not estimatedThe source records don’t support an estimate.
Classification4 codes
- G11B 5/7266
Inorganic carbon protective coating, e.g. graphite, diamond like carbon or doped carbon: comprising a lubricant over the inorganic carbon coating
- G11B 5/8408
Processes or apparatus specially adapted for manufacturing record carriers: protecting the magnetic layer
- G11B 5/7268
Inorganic carbon protective coating, e.g. graphite, diamond like carbon or doped carbon: comprising elemental nitrogen in the inorganic carbon coating
- G11B
Information storage based on relative movement between record carrier and transducer
Family
- US 2004/0241380 A1Pre-grant publication · published 2 Dec 2004
- US 7,166,319 B2This patent
From the US filing history. Foreign family members aren’t listed.