Hardening chromium oxide films in a magnetic tape head and other structures
US9773513B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2015 |
| Grant date | Sep 26, 2017 |
| Priority date | — |
| Expiry date | Jul 31, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3106
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A chromium oxide film is formed at room temperature. The chromium oxide film has at least one partially polycrystalline portion and/or at least one amorphous portion depending upon the substrate(s) over which the chromium oxide film is formed. Partially polycrystalline portion(s) of the chromium oxide film are exposed, at room temperature, to an electron beam that has an accelerating voltage of at least 100 kilovolts to further crystallize the partially polycrystalline portion(s). Amorphous portion(s) of the chromium oxide film are exposed, at room temperature, to an electron beam that has an accelerating voltage of more than 100 kilovolts to crystallize the amorphous portion(s).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.