Method of making a magnetic recording/reading head
US5781986A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 17, 1995 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Nov 17, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49066
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for the making of a magnetic recording/reading head comprises the following steps: PA1 the making of magnetic excitation wires on or in a first face of a substrate having this first face and a second face opposite the first face; PA1 the making, on the first or second face of the substrate, of at least two magnetic poles separated by a gap; PA1 the drilling of holes through the substrate from the face opposite the one bearing the magnetic poles, each ending in such a way that there is magnetic coupling between the bottom of the hole and the pole; PA1 the deposition of a layer of material with high magnetic permeability in the holes and in the zones of the substrate located between the holes. Applications: the making of magnetic recording/reading heads for video-tape recorders, computer peripherals and professional recording machines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.