Alignment of magnetic poles of thin film transducer
US5578342A · kind A · utility
27Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1995 |
| Grant date | Nov 26, 1996 |
| Priority date | — |
| Expiry date | Jul 5, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3163
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A process for producing a thin film magnetic head uses the upper magnetic pole as a self-aligning mask for partially trimming the lower magnetic pole, wherein the yoke and pole tip regions to be trimmed are processed by separate and distinct photolithographic steps, thereby achieving noncritical alignment in the yoke area, while maintaining critical alignment in the pole tip region which includes the transducing gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.