Substrate for magnetic disk and magnetic disk
US11640833B2 · kind B2 · utility
1Cited by
3References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 7, 2019 |
| Grant date | May 2, 2023 |
| Priority date | — |
| Expiry date | Aug 7, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/73919
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk-shaped substrate for a magnetic disk has a diameter D of 85 mm or more and a thickness T of 0.6 mm or less, and a material of the substrate has a Young's modulus E of 90 GPa or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.