Mechanical textured sol-gel-coated substrates for magnetic recording media
US6746754B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 2001 |
| Grant date | Jun 8, 2004 |
| Priority date | — |
| Expiry date | Sep 5, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/8404
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of manufacturing a magnetic recording medium comprises steps of providing a non-magnetic substrate having at least one surface; forming a layer of a sol-gel on the surface, partially drying the sol-gel layer at room temperature to remove a portion of the solvent therein to form a partially dried sol-gel layer of hardness less than that of the substrate; mechanically texturing the surface of the partially dried sol-gel layer; and depositing a layer stack including at least one magnetic layer thereover. Embodiments of the invention include embossing a servo pattern in the as-deposited sol-gel layer prior to partial drying and mechanically texturing, followed by sintering at an elevated temperature to form a substantially fully dried layer having a density and hardness similar to that of glass, and formation of a thin film magnetic media layer stack thereon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.