Enlarged substrate for magnetic recording medium
US9799364B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2017 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | May 15, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/1238
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An enlarged substrate configuration for magnetic recording media. In some embodiments, an apparatus comprises a disc shaped member of metal or glass configured as a substrate for a magnetic data recording disc for a 2½ inch form factor data storage device or a 3½ inch form factor data storage device. The disc shaped member has a top planar surface, an opposing bottom planar surface, an outermost annular sidewall that extends between the top planar surface and the bottom planar surface at an outermost diameter of nominally 67 or 97 millimeters, respectively, and an inner annular sidewall that extends between the top planar surface and the bottom planar surface to define a central aperture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.