C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 14/06 (2006.01)
Patent
CA 2317235
The invention provides improved razors and razor blades and processes for producing razor blades or similar cutting tools with sharp and durable cutting edges. One such process comprises the steps of providing a substrate, forming a wedge-shaped sharpened edge on the substrate and depositing a layer of amorphous diamond material as a coating on the sharpened edge. The sharpened edge has an included angle of less than thirty degrees and a tip radius of less than 1,200 angstroms. As part of the depositing step an initial high bias is applied to the substrate and then a second lower bias is applied to the substrate. The amorphous diamond coating imparts stiffness and rigidity to a thin blade while maintaining a high aspect ratio.
Decker Thomas G.
Lundie Gregory P.
Pappas David L.
Parent C. Robert
Welty Richard P.
Macrae & Co.
The Gillette Company
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