Magnetic write head manufactured by damascene process producing a tapered write pole with a non-magnetic step and non-magnetic bump
US8347488B2 · kind B2 · utility
20Cited by
15References
23Claims
0Family size
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Key dates
| Filing date | Dec 9, 2009 |
| Grant date | Jan 8, 2013 |
| Priority date | — |
| Expiry date | May 18, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49052
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for manufacturing a magnetic write head having a non-magnetic step layer, non-magnetic bump at the front of the non-magnetic step layer and a write pole with a tapered trailing edge. The tapered portion of the trailing edge of the write pole is formed by a two step process that allows the write pole taper to be formed with greater accuracy and repeatability than would be possible using a single step taper process. An alternative method is also described on how to make a non-magnetic bump structure with adjustable bump throat height prior to Damascene side shield gap formation in a Damascene wrap around shield head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.