Protective layers of germanium ceramics
US5108846A · kind A · utility
Inventor
Key dates
| Filing date | Jul 12, 1990 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Jul 12, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The novel polycrystalline, unoriented or X-ray amorphous carbide, oxide and/or nitride ceramics which have the elemental composition I ##STR1## where M is at least one element from the group consisting of titanium, zirconium, hafnium, thorium, scandium, yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, rhenium, iron, cobalt, nickel, ruthenium, rhodium, copper, zinc, magnesium, calcium, strontium, barium, boron, aluminum, gallium, indium, thallium, tin, lead, phosphorus, arsenic, antimony, bismuth and tellurium and x is from 0.01 to 0.7, can be used, in the form of thin layers, as diffusion barriers, anticorrosion layers or interference layers, for protecting surfaces from mechanical abrasion or for protecting magneto-optical recording layers from corrosion. These novel thin polycrystalline, unoriented or X-ray amorphous layers of germanium ceramics can be prepared with the aid of reactive sputtering or reactive magnetron sputtering of a target which consists of the abovementioned elemental composition I.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.