Method for reducing pole and alumina recession on magnetic recording heads
US6949004B1 · kind B1 · utility
9Cited by
7References
55Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 6, 2003 |
| Grant date | Sep 27, 2005 |
| Priority date | — |
| Expiry date | Sep 6, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49041
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A manufacturing process for reducing magnetic spacing loss in a magnetic recording head. The recession of the transducer relative to the substrate at the air bearing surface is decreased by applying a coating of sacrificial material such as diamond-like carbon to the upper surfaces of the substrate, the transducer, and the encapsulation material such as alumina prior to final kiss lapping. The recession due to the alumina being softer than the substrate is greatly reduced since the DLC is kiss-lapped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.