Patent ID: 11862443
Assignee: SUMITOMO CHEMICAL COMPANY LIMITED
Field: Surface technology, coating (Chemistry)
Classification: CPC H  C | IPC C  H

Claim 0:
1. A sputtering target comprising a target material, wherein a sputtering face of the target material has a circular shape and a ramp, wherein
the target material includes a flat circular first region positioned at a center of the sputtering face, and a flat ring-shaped second region positioned around the first region, wherein
the ramp has been provided so as to reduce a thickness of the target material, toward inner part of the sputtering face in the radial direction of the sputtering face between the first region and the second region, wherein
a diameter of the first region accounts for 32% or more and 58% or less of a diameter of the sputtering face, and
a thickness of the ramp is 0.5 mm to 5 mm, wherein
the thickness of the first region is 10 mm to 30 mm, wherein
the ring width of the second region is 5 mm to 75 mm.