US Patent 12109681 Substrate handling device and processing chamber

A substrate handling device includes a substrate reception area defined by an edge. The substrate reception area includes a planar surface, wherein the edge extends upward from the planar surface. The substrate reception area further includes a plurality of contact structures extending upwards from the planar surface, wherein a first contact structure of the plurality of contact structures directly contacts a side surface of the edge, and a second contact structure of the plurality of contact structures is separated from the edge. The substrate reception area and the planar surface include a first material. At least one contact structure of the plurality of contact structures includes a second material different from the first material, and the second material has a hardness aligned to a hardness of a substrate material.