Servo pattern formation via transfer of sol-gel layer and magnetic media obtained thereby
US6723198B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2002 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Mar 13, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/57
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of manufacturing a magnetic recording medium including a servo pattern, comprising steps of:(a) providing a non-magnetic substrate including at least one major surface;(b) providing a stamper having a surface with a plurality of recesses forming a negative image of a servo pattern;(c) forming a layer of a partially dried sol-gel material having a first surface in conformal contact with the recess-patterned surface of the stamper and an exposed second surface opposite the first surface;(d) urging the major surface of the substrate into contact with the exposed second surface of the sol-gel layer;(e) removing the stamper from contact with the layer of sol-gel material to expose the recess-patterned surface thereof;(f) converting the partially dried sol-gel layer to a glass-like layer while preserving the recess pattern in the surface thereof; and(f) forming on the recess-patterned surface a laminate of layers constituting a servo-patterned magnetic recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.