Magnetic shields for reduced variations of head-media spacing
US7031122B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2002 |
| Grant date | Apr 18, 2006 |
| Priority date | — |
| Expiry date | Mar 6, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention offers a magnetic recording head that includes a substrate, a read sensor, and at least one shield positioned adjacent to the read sensor, wherein the shield contributes to thermal pole-tip recession in an amount less than about 0.5 Å/° C. The invention also offers a magnetic recording head that includes a substrate having a coefficient of thermal expansion, a read sensor, and at least one shield, positioned adjacent to the read sensor, that has a coefficient of thermal expansion within ±2×10−6/° C. of the coefficient of thermal expansion of the substrate. The invention further offers a magnetic recording head that includes a substrate, a read sensor, and at least one shield, positioned adjacent the read sensor, with a thickness of from about 0.05 μm to about 0.5 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.