Disk biasing for manufacture of servo patterned media
US6757116B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2002 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | Jun 23, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/81
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of manufacturing a patterned data/information storage and retrieval medium in the form of an annular disk having an outer diameter, a central opening defining an inner diameter, and opposed first and second major surfaces, the method including inserting a smaller diameter cylindrical shaft of a stamping/imprinting tool in the central opening and biasing the inner diameter of the disk into contact with the cylindrical shaft at a pre-selected location along the inner diameter of the disk during stamping/imprinting of a pre-selected pattern such as a servo pattern in at least one of the first and second major surfaces of the disk, the biasing creating a space between the inner diameter of the disk and the surface of the cylindrical shaft which has a maximum width at a location diametrically opposite the pre-selected location. A disk drive system is then formed by mounting the patterned medium on a drive spindle shaft with the medium biased into contact with the shaft at the pre-selected location along the inner diameter of the medium, whereby proper centering of the servo pattern is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.