Multitrack magnetic heads
US4158213A · kind A · utility
14Cited by
15References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1978 |
| Grant date | Jun 12, 1979 |
| Priority date | — |
| Expiry date | Jun 19, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3163
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
High track density multitrack magnetic heads are batch-fabricated from a stack of wafers which are photolithographically processed to provide lands and grooves on the wafers. Thin magnetic films are deposited in the grooves; and coils respectively inductively cooperative with the films are photolithographically formed about the films, the lands serving both to provide track-to-track spacing and to protect the magnetic films from magnetostriction-producing stress.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.