Fully integrated matrix magnetic recording head with independent control
US6650496B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 15, 2001 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Jan 5, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3163
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A matrix array of recording heads, wherein each head is independent from another both in terms of its magnetic circuit and excitation conductors. Each individual head has a planar magnetic circuit and an helical coil wrapped around the lower part of the magnetic circuit. The matrix array is collectively fabricated using full thin film technology on non-magnetic substrates. Preferably, the heads are aligned in an oblique lattice with the write gaps aligned along rows and offset by a constant value along columns. Each individual head is connected to the control electronics through interconnects to the backside of the wafer, allowing independent control of the write parameters. The die forming the device is shaped on its edges and top surface to optimize head/medium positioning and minimize wear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.