Patent ID: 11955368
Assignee: IMEC VZW
Field: Semiconductors (Electrical engineering)
Classification: CPC B  H | IPC H

Claim 20:
21. A reconditioning wafer configured to make indentations in a wafer support surface of a wafer holding stage in a semiconductor manufacturing or treatment tool, the reconditioning wafer comprising:
a carrier substrate; and
on a planar surface of the carrier substrate, at least one 2-dimensional array of regularly spaced protrusions, the protrusions having substantially the same shape and dimensions and wherein at least the tip of the protrusions is formed of an indentation material that is suitable to make the indentations,
wherein (1) the reconditioning wafer further comprises an additional layer that covers at least an area of the carrier substrate that corresponds to the array of protrusions, and wherein the thickness of the additional layer is less than the height of the protrusions, so that the tip of the protrusions extends outwardly from the surface of the additional layer, or
wherein (2) the planar surface of the carrier substrate comprises, in an area apart from the at least one array of protrusions, a layer formed of a material that is suitable to pick up debris from the support surface of the wafer holding stage.