Thin film magnetic head with back insulating layer laminated on back region of gap layer provided in insulating layer trench
US6369984B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 28, 2000 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Mar 28, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3133
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An upper core layer and a lower core layer are extended from a back region to a pole tip region so that the surfaces thereof are exposed from a medium-facing surface, and a back insulating layer made of a novolak resin and having an apex surface formed by post baking is formed in the back region on a gap layer provided between the upper core layer and the lower core layer. Furthermore, an upper pole layer is formed on the pole tip region side of the gap layer by electroplating using the gap layer as an electrode so that the gap depth Gd is determined by the length from the medium-facing surface to the back insulating layer in a portion of the upper pole layer which contacts the gap layer, and a coil is partially provided on the back insulating layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.