Superconducting information storage device
US5016128A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1988 |
| Grant date | May 14, 1991 |
| Priority date | — |
| Expiry date | Apr 27, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information storage device includes a magnetic recording medium, preferably supported upon a rotating disk, an electromagnetic writing device that writes magnetic patterns into the recording medium, and a superconducting quantum interference device (SQUID) that reads the magnetic patterns in the recording medium, the writing device and the SQUID preferably being mounted upon a read/write head. The SQUID as operated in its superconducting state is a highly sensitive and directional detector of the magnetic state of the recording medium, permitting it to be spaced relatively distantly from the recording medium yet read the state of small areas of the medium. Use of high temperature superconductors in the SQUID permits practical construction of the information storage device. The read/write head may support a plurality of write devices, and an array of SQUIDs can be utilized so that little or no relative movement of the read/write head is required to read and write from all tracks of the disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.