Process for forming a flux enhanced magnetic data transducer
US5639509A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 22, 1996 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Jul 22, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1186
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A flux enhanced data transducer and method for producing the same in conjunction with shared shields on MR read heads in which substantially between 500-2500 .ANG. of a relatively higher magnetic moment material is added to the upper surface of the shared shield, or bottom write head pole, prior to a magnetic flux containment ion milling operation utilizing the upper pole as a mask. The relatively higher magnetic moment flux enhancement layer may comprise CoNiFe, FeN or similar material which is deposited prior to the formation of the dielectric gap layer. The flux enhancement layer may then be selectively removed substantially surrounding the upper pole by means of a relatively brief ion milling process in which only on the order of 1.0 k.ANG. of the layer need be removed and during which only an insignificant amount of the material removed might be re-deposited on the sides of the upper pole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.