초록 ▼

Improved razors and razor blades and processes for producing razor blades or similar cutting tools with sharp and durable cutting edges, by hard-carbon coating of blades with amorphous diamond, preferably using a filtered cathodic arc plasma source. A coating of amorphous diamond having at least 40

Improved razors and razor blades and processes for producing razor blades or similar cutting tools with sharp and durable cutting edges, by hard-carbon coating of blades with amorphous diamond, preferably using a filtered cathodic arc plasma source. A coating of amorphous diamond having at least 40 percent sp3 carbon bonding, a hardness of at least 45 gigapascals and a modulus of at least 400 gigapascals is applied to the sharpened edge of a substrate. The substrate may be mechanically honed, and there is no interlayer between the substrate and the amorphous diamond coating. The coating imparts stiffness and rigidity to a thin blade while maintaining a high aspect ratio.

대표청구항 ▼

[ What is claimed is:] [1.] A process for forming a razor blade comprising the steps of:(a) providing a substrate;(b) forming a wedge-shaped sharpened edge on said substrate that has an included angle of less than thirty degrees and a tip radius of less than 1,200 angstroms; and(c) depositing a laye

[ What is claimed is:] [1.] A process for forming a razor blade comprising the steps of:(a) providing a substrate;(b) forming a wedge-shaped sharpened edge on said substrate that has an included angle of less than thirty degrees and a tip radius of less than 1,200 angstroms; and(c) depositing a layer of amorphous diamond on said sharpened edges; applying an initial high bias to the substrate during deposition, and then applying a second lower bias to the substrate during deposition.