Method for making a write head for magnetic recording
US9972345B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2015 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | Nov 10, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method includes depositing a layer of pole material on a substrate. The layer of pole material has a bottom surface that is adjacent to the substrate and a top surface that is opposite the bottom surface. A masking material is deposited over a portion of the top surface. Material from the pole material unprotected by the masking material is removed to form a write pole having first and second side walls. At least a portion of a trench formed by removal of the material from the layer of pole material is filled with a sacrificial material. The mask and a portion of the write pole at the top surface are removed to form a beveled trailing edge surface. The sacrificial material is then removed. Front shield gap material is deposited over the beveled trailing edge surface and over portions of the side walls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.