Self aligned magnetic poles using sacrificial mask
US4992901A · kind A · utility
39Cited by
8References
52Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1990 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Feb 15, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49064
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a method of manufacturing a thin film magnetic head having aligned top and bottom pole tip pieces, a sacrificial mask protects the upper pole tip while the exposed non-aligned portions of the gap material and lower pole tip are removed. The sacrificial mask is deposited using a self alignment technique.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.