Nonmetallic thin film magnetic recording disk with pre-seed layer
US6586116B1 · kind B1 · utility
5Cited by
15References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2000 |
| Grant date | Jul 1, 2003 |
| Priority date | — |
| Expiry date | Feb 9, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The design of a magnetic thin film disk, for use in a disk drive, with an amorphous or nanocrystalline pre-seed layer preferably followed by a ruthenium-aluminum (RuAl) seed layer is described. The pre-seed layer may be CrTa or AlTi. The pre-seed layer deposited over a glass substrate, for example, allows a more strongly oriented RuAl seed layer to be deposited and, thus, favorably influences the orientation and grain size in the subsequent layers which include preferably at least one Cr alloy underlayer and at least one magnetic layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.