Planarizing method for fabricating an inductive magnetic write head for high density magnetic recording
US6024886A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1997 |
| Grant date | Feb 15, 2000 |
| Priority date | — |
| Expiry date | Dec 5, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49052
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Within a method for forming a magnetic transducer head there is first provided a substrate having formed thereover a lower magnetic pole layer in turn having formed thereupon a gap filling layer which is substantially planar. There is then formed upon the gap filling layer a patterned upper magnetic pole tip layer which serves as an etch mask layer for forming from the gap filling layer and the lower magnetic pole layer a patterned gap filling layer and an etched lower magnetic pole layer having a lower magnetic pole tip integral thereto, while simultaneously forming an etched patterned upper magnetic pole tip layer from the patterned upper magnetic pole tip layer. There is then formed upon the etched patterned upper magnetic pole tip layer and the etched lower magnetic pole layer a backfilling insulator layer to a thickness greater than a thickness of the etched patterned upper magnetic pole tip layer plus a thickness of the patterned gap filling layer plus a thickness of the lower magnetic pole tip. There is then planarized the backfilling insulator layer to form a patterned planarized backfilling insulator layer an exposed upper surface of which is coplanar with an exposed upper…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.