Magnetic data recording device
US7641124B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2006 |
| Grant date | Jan 5, 2010 |
| Priority date | — |
| Expiry date | Apr 12, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/00808
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
A Q-Chip MEMS magnetic device comprises a thin-film electronic circuit for implantation in the Track-2 area of a magnetic stripe on the back of a credit card. The Q-Chip MEMS magnetic device periodically self-generates new sub-sets of magnetic data that are to be read in combination with other magnetic data that is permanently recorded in the surrounding surface of the magnetic stripe. A collocated battery and microcontroller provide operating power and new data for magnetic bit updates. A swipe sensor triggers such updates by sensing electrical contact with a legacy card reader. Several thin-film coils of wire are wound end-to-end around a common, flat, ferrous core. These are driven by the microcontroller. In one instance, such core comprises “hard” magnetic material with a coercivity of 200-300 Oersteds. Magnetic data written from the corresponding adjacent coils will persist for later readings by a legacy card reader. In another instance, the core comprises “soft” magnetic material with a coercivity of about one Oersted. A media stripe of “hard” magnetic film material overlays respective coils to receive magnetic data transfers. Magnetic data written from the corresponding adja…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.