Magnetic tape
US6103365A · kind A · utility
20Cited by
0References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1998 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | Oct 21, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic tape having formed on its backcoating layer 5 a recess 10 of prescribed shape capable of yielding an optical contrast to provide optical information with which servo tracking of data tracks on the magnetic layer is effected, the recess having a depth of 0.05 to 1 .mu.m and a width of 0.25 to 30 .mu.m, and the backcoating layer 5 having an arithmetic mean roughness Ra of 4 to 20 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.