Patent ID: 11878353
Assignee: MITSUBISHI MATERIALS CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 2:
3. The diamond-coated rotary cutting tool according to claim 1, wherein
a length ratio (a/b) is a rate of lengths (a) and (b) of the respective diamond particles observed on a cross section perpendicular to the surface of the tool base, where: the length (a) is along a perpendicular direction to the surface of the tool base, and the length (b) is along a parallel direction to the surface of the tool base,
the length ratio (a/b) of the diamond particles of the first diamond layer is less than 1.5, and
the length ratio (a/b) of the diamond particles of the second diamond layer is not less than 1.5.