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US 12,691,601 B2Granted
Razor blade and manufacturing method thereof
AssigneeDorco Co., Ltd.
InventorsMin Joo Park, Sung Hoon Oh, Seong Won Jeong
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Abstract
Proposed is razor blade coating by a physical vapor deposition method, by forming a hard coating layer as a thin coating layer in which chromium boride, which is a nanocrystalline structure having high hardness, is dispersed in an amorphous mixture of chromium and boron, thereby improving the strength and hardness of the thin coating layer and securing the bonding force by chromium in the amorphous mixture between the hard coating layer and a blade substrate on which an edge of the razor blade is formed.
Claims9
A method of manufacturing a razor blade, the method comprising:
- performing a heat treatment on a blade substrate;
- forming a blade edge on the blade substrate by polishing the heat-treated blade substrate;
- and
- forming a coating layer by performing physical vapor deposition (PVD) on the heat-treated blade substrate, on which the blade edge is formed, by using a single composite target comprising a combination of dissimilar materials including a first material, a second material and a third material, and
- wherein an area ratio of the dissimilar materials in at least one of the single composite target varies in a direction in which the blade substrate moves through a deposition with respect to the single composite target.
2 more elements
Dependencies are inferred from the claim text.