Production of a sheet-like, multilayer magneto-optical recording material
US4959243A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 24, 1989 |
| Grant date | Sep 25, 1990 |
| Priority date | — |
| Expiry date | Jan 24, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magneto-optical recording element comprising a film (C) consisting essentially of multiple separate carbide, nitride and/or oxide layers is produced on a surface to be covered by a process comprising the following steps: (I) application of a 30-500 nm thick film (C.sub.1) via the gas phase to the relevant surface to be covered, the said film (C.sub.1) having the following specifications: PA1 (C.sub.11) the film (C.sub.1) consists of two or more components; PA1 (C.sub.12) the said components are present in three or more separate elements and element carbide, nitride and oxide layers, each consisting of one or more of the said components; PA1 (C.sub.13) the components of the said element layers are selected from the group consisting of boron, aluminum, gallium, indium, silicon, germanium, tin, lead, antimony, bismuth, magnesium, titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, iron, cobalt, zinc, cadmium, lanthanum, cerium, praseodymium, neodymnium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and thorium; PA1 (C.sub.14) the components of the said element carbide, nitride and oxide layer…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.