Stock material or miscellaneous articles – Self-sustaining carbon mass or layer with impregnant or...
Reexamination Certificate
2006-07-13
2010-10-26
Speer, Timothy M (Department: 1784)
Stock material or miscellaneous articles
Self-sustaining carbon mass or layer with impregnant or...
C428S457000, C428S469000, C428S702000
Reexamination Certificate
active
07820293
ABSTRACT:
The invention relates to a metal substrate (11) coated at least partially with a layered structure. The layered structure comprises an intermediate layer (14) deposited on said substrate (11) and a tetrahedral carbon layer (16) deposited on said intermediate layer. The intermediate layer comprises at least one amorphous carbon layer having a Young's modulus lower than 200 GPa and the tetrahedral carbon layer has a Young's modulus higher than 200 GPa. The invention further relates to a method to improve the adhesion of a tetrahedral carbon layer to a substrate and to a method to bridge the gap in Young's modulus of the metal substrate and the Young's modulus of a tetrahedral carbon coating deposited on said metal substrate.
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Foley & Lardner LLP
NV Bekaert SA
Speer Timothy M
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