Thin film magnetic head
US5113300A · kind A · utility
29Cited by
8References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1991 |
| Grant date | May 12, 1992 |
| Priority date | — |
| Expiry date | Aug 21, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3116
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thin film magnetic head which includes a substrate of magnetic or nonmagnetic material, an upper magnetic film on the substrate, a coil conductor on the substrate, and a lower magnetic film on the substrate, the lower magnetic film having a groove formed therein for receiving the coil conductor therein. In the preferred form of the present invention, the thickness of the lower magnetic film is at least 0.3 times the thickness of the upper magnetic film when the substrate is composed of a magnetic material and at least 0.8 times the thickness of the upper magnetic film when the substrate is composed of a nonmagnetic material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.