Format patterning method for magnetic recording media
US4684547A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1985 |
| Grant date | Aug 4, 1987 |
| Priority date | — |
| Expiry date | Dec 27, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/928
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for format patterning magnetic recording media with servo-control patterns is disclosed herein. The method comprises the steps of printing the control pattern using a resist in liquid form onto the media material by conventional printing techniques. A layer of a thin metallic film is then deposited over the resist and uncovered substrate areas. The resist and its overlayered metal is then removed using a liftoff technique by dissolving the resist in its particular solvent. A control pattern of deposited metallic film remains in those non-resist areas. In the alternative, the process can also use an etching bath to create the servo control pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.