Process for forming a magnetoresistive sensor for a read/write head
US5622874A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1996 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Jun 21, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N50/01
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sensor for use in read/writing the magnetic pattern stored in a magnetic storage disk uses a Corbino structure comprising inner and outer electrodes enclosing a magnetoresistive element. The sensor is formed at the front surface of a stack of superposed layers of which the first and fifth are of a high resistivity semiconductive material, the second and fourth are of a magnetoresistive material and the third of a metal or composite structure. The second and fourth layers form a loop around the third layer, the first and fifth form a loop around the second and fourth layers. A dopant is diffused into the front surface of the stack to convert edge portions of the first and fifth layers to low resistivity to form a conductive loop that serves as the outer electrode of the Corbino disk, the third electrode serving as the inner electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.