Inverted write head with high-precision track width definition
US6563669B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2000 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Mar 27, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3967
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of fabricating a thin film magnetic transducer and the resulting transducer structure is disclosed. The method starts with the formation of a bottom pole having an upper portion and a lower portion in a zero throat region. The upper portion has an upper portion width and the lower portion had a lower portion width, wherein the lower portion width is greater than the upper portion width. A gap layer is then formed over the bottom pole, and the top pole is formed over the gap layer. The top pole width is greater than the bottom pole's lower portion width. In one embodiment, a planarization layer is deposited overlaying the bottom pole prior to formation of the gap layer. Lapping is then performed to reduce the planarization layer and the bottom pole's upper portion to a flat surface suitable for receiving the gap layer deposition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.