Data storage device, apparatus and method for using same
US9430727B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2013 |
| Grant date | Aug 30, 2016 |
| Priority date | — |
| Expiry date | Feb 12, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49069
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data storage device serving as a portable card, magnetically encodeable card, or a magnetic credit card is shown. The data storage device includes a substrate having at least one surface. A high density, magnetically coercive material layer is disposed on or is deposited on the substrate for storing magnetic signals. The magnetically coercive material may have an axis of magnetization that is oriented in a predetermined direction relative to the at least one surface of the substrate. A layer of non-magnetically material is disposed on the substrate for defining an exchange break layer. A relatively hard, abradeable protective coating is formed on the magnetic material layer and has a thickness between a maximum thickness that materially attenuates magnetic signals passing between the magnetic material layer and a transducer and a minimum thickness enabling the protective coating to be abraded by usage in an ambient natural atmosphere operating environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.