Optimization of temperature dependent variations in shield and pole recession/protrusion through use of a composite overcoat layer
US6747841B1 · kind B1 · utility
19Cited by
37References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2001 |
| Grant date | Jun 8, 2004 |
| Priority date | — |
| Expiry date | Dec 9, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic head has an air bearing surface, a substrate, a data transducer and a composite overcoat layer. The data transducer is positioned upon the substrate adjacent the air bearing surface. The data transducer includes a plurality of metallic layers. The composite overcoat layer is positioned upon the data transducer on a side of the data transducer opposite the substrate. An effective coefficient of thermal expansion of the composite overcoat layer is substantially equal to a coefficient of thermal expansion of a material forming the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.