Thin film magnetic head including layered magnetic side poles
US5748417A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1996 |
| Grant date | May 5, 1998 |
| Priority date | — |
| Expiry date | May 1, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/4893
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thin film magnetic head is fabricated on a substrate by depositing a seed layer on the substrate. This seed layer is advantageously used as a common seed for a plurality of magnetic head related structures which are built-up on the substrate. A lower magnetic layer is plated on the substrate in an opening provided in an insulative layer which is deposited on the substrate. The aforementioned seed layer is used as the seed for this lower magnetic layer. A plurality of magnetic layers are plated at one end of the lower magnetic layer to build-up and form a first side pole by using the above seed layer as a seed. Another plurality of magnetic layers are plated at the other end of the lower magnetic layer to build-up and form a second side pole by using the same seed layer as a seed. The first and second side poles thus formed include upper and lower ends, the lower ends being plated to the ends of the lower magnetic layer. A first upper pole is plated to the upper end of the first side pole. The first upper pole includes a gap end facing the second side pole. A gap region of nonmagnetic material is deposited adjacent the gap end of the first upper pole. A second upper pole is plated…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.