Magnetic tape device and head tracking servo method
US10008230B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2017 |
| Grant date | Jun 26, 2018 |
| Priority date | — |
| Expiry date | Dec 26, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/8408
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The magnetic tape device includes: a magnetic tape; and a servo head, in which the servo head is a TMR head, the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder, a binding agent, and fatty acid ester on the non-magnetic support, the magnetic layer includes a servo pattern, full widths at half maximum of spacing distribution measured by optical interferometry regarding a surface of the magnetic layer before and after performing a vacuum heating with respect to the magnetic tape are greater than 0 nm and equal to or smaller than 7.0 nm, and a difference between a spacing measured by optical interferometry regarding the surface of the magnetic layer after performing the vacuum heating with respect to the magnetic tape and a spacing measured before performing the vacuum heating is greater than 0 nm and equal to or smaller than 9.0 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.