Thin film mangetic head and method of manufacturing same
US6353995B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1999 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Dec 13, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49044
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A insulating layer having a opening corresponding to a bottom pole tip is formed on a bottom pole layer. The insulating layer is made of a insulating material such as alumina and formed by, for example, sputtering or CVD. On the insulating layer and the bottom pole layer, a magnetic layer is formed. Subsequently, the magnetic layer is planarized to expose the surface of the insulating layer by CMP (Chemical and Mechanical Polishing). By this step, a bottom pole tip adjacent to the insulating layer is formed on the bottom pole layer. Using this method, it is easy to manufacture a structure that the magnetic pole and the insulating layer lie contiguously and a throat height of a recording head is determined precisely.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.