Method for fabricating balanced shield connections for noise reduction in MR/GMR read heads
US6453542B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 2000 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Feb 28, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49165
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for fabricating balanced shield connections for noise reduction MR/GMR read heads and an MR/MGR read head so fabricated. The present invention teaches a method for forming a balanced electrical half-bridge in parallel with the MR/GMR element of a read head so as to reduce readback noise caused by discharges between the two ends of the MR/GMR sensor element, which are at different potentials as a result of the bias current passing through the sensor, and the magnetic shields, whose potential is constant. The half-bridge is connected to each of the magnetic shields by interconnects attached to a pad at its mid-point, thus placing the shields at the same average potential as the sensor element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.