Document Type and Number:
Japanese Patent JPWO2023084988
Kind Code:
A1
Abstract:
A ring-shaped contact comprising a multi-crystal diamond formed from a plurality of diamond particles, said contact being formed in a manner such that the axis of rotation passes through the center thereof, and being equipped with a first section which includes an inside end section and has a constant thickness in the radial direction, and a second section which includes an outside end section and has a thickness which decreases in the radial direction, wherein: the second section has a first surface which is contiguous with the upper surface of the first section, a second surface which is contiguous with the bottom surface of the first section, and a connecting surface which connects the first surface and the second surface and includes the outside end section; the angle θ formed between a first line segment describing the first surface and a second line segment describing the second surface in a cross-section along the axis of rotation is 100-150°, inclusive; the length between a first boundary section, which is the boundary between the first surface and the connecting surface, and a second boundary section, which is the boundary between the second surface and the connecting surface, is 1-10μm, inclusive; the length from the axis of rotation to the outside end section is 0.5-5mm, inclusive; and the average particle diameter of the plurality of diamond particles is 10-300nm, inclusive.
Application Number:
JP2023559497A
Publication Date:
May 19, 2023
Filing Date:
October 13, 2022
Export Citation:
