Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2004-09-08
2009-06-02
Speer, Timothy M (Department: 1794)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S702000, C428S698000
Reexamination Certificate
active
07541102
ABSTRACT:
A protective layer having at least one hard-material layer is provided. The hard-material layer is formed from one or more of the following materials metal oxide, metal nitride, metal carbide, metal oxynitride, metal carbonitride, and metal oxycarbonitride. The hard-material layer has laterally closely cohesive, crystalline columns which grow perpendicular to the surface of the body. In some embodiments, the crystalline columns have a lateral dimension which is on average less than 1 μm, preferably less than 200 nm, and which predominantly has crystal orientations which, in the case of columnar growth, have little tendency to widen out, the surface roughness of the hard-material layer having an Ravalue of less than 50 nm, preferably less than 20 nm.
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Dzick Jürgen
Klippe Lutz
Krause Cora
Ohlandt Greeley Ruggiero & Perle L.L.P.
Schott AG
Speer Timothy M
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