Magnetic transfer apparatus, magnetic transfer method and magnetic recording medium with magnetic information transferred thereto
US8004781B2 · kind B2 · utility
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2References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 15, 2008 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | Jul 7, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/865
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic transfer apparatus and method includes air supply for supplying air into a space above a peripheral portion of a double-sided slave disc beyond a second master disc in an air-tight chamber formed when a first disc holder holding a first master disc and the slave disc in contact and a second disc holder holding the second master disc are brought into contact with each other so as to hold and sandwich the slave disc between the first and second master discs, the air supply being controlled to take place at least either during formation of the air-tight chamber or during opening the air-tight chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.