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

Claim 3:
4. The diamond-coated rotary cutting tool according to claim 1, wherein
in a wave-form separation of Raman spectrum on a cross section of the diamond coating perpendicular to the surface of the tool base, an intensity (d) is a peak (d band) coming from a sp3 hybrid orbital of diamond existing around 1332 cm−1, and an intensity (G) is a peak (G band) coming from a sp3 hybrid orbital of graphite existing around 1580 cm−1, and wherein
an intensity ratio (d/G) of the first diamond layer satisfies 0.1≤(d/G)≤0.8, and
the intensity ratio (d/G) of the second diamond layer satisfies 0.8≤(d/G).