Method for manufacturing a magnetic write head
US6539610B1 · kind B1 · utility
9Cited by
14References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2000 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | Jul 14, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49052
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A high throughput method for producing the narrow track width inductive head is also provided, whereby the heads may be manufactured in substantial volumes. The new head may be merged or piggy-backed MR or GMR heads, comprising a first pole piece, P1, and a second pole piece, P2, and is distinctly characterized by write track width is significantly reduced by a preliminary ion milling process before P1 notching is performed. The preliminary step utilizes an ion milling process to trim the write track width, P2B, at an angle between 45 to 85 degrees from the wafer normal. The MR head may then undergo conventional P1 notching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.