Patent ID: 11935779
Assignee: SEMES CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A substrate processing apparatus comprising:
an index module with a load port on which a container configured to store a substrate is placed; and
a processing module configured to perform a treatment process on the substrate,
wherein a robot with a transfer hand for transferring the substrate is provided at the index module and/or the processing module,
wherein the transfer hand comprises:
a body with a finger, a main body, and a base installed at the finger or the main body; and
a vacuum assembly installed at the body and supporting the substrate at an upper surface of the body by vacuum pressure bottom surface of the substrate,
wherein the vacuum assembly includes,
a conductive vacuum pad contacting the substrate and provided to be tiltable with respect to an axis perpendicular to the upper surface of the body,
a conductive ring provided between the vacuum pad and the base, and contacting and electrically connecting to the vacuum pad and the base,
a head portion contacting a bottom surface of the substrate;
an insertion portion inserted in the body; and
a contact portion between the head portion and the insertion portion and contacting the conductive ring, and the contact portion is provided in a curved shape, and
a radius of a curvature of the conductive ring in a cross-section and a radius of a curvature of the contact portion in a cross section are the same along an entirety of the contact portion,
wherein the base is electrically connected to the main body or the finger, the main body or the finger configured to be grounded,
a discharging path to ground exists from the vacuum pad through the conductive ring when the vacuum pad is not in contact with the body, the discharging path extending from the conductive ring through the body when the vacuum pad is not in contact with the body,
the conductive ring is provided as a material that has a resistance value smaller than a resistance value of the vacuum pad, and
the body is provided as a material that has a resistance value smaller than the resistance value of the conductive ring,
wherein the vacuum pad defines,
a hole in communication with a vacuum line, the vacuum line being provided in the body and configured to provide decompression to a lower surface of the substrate; and the vacuum pad comprises:
a ring protrusion at an edge area of an upper surface of the vacuum pad; and
a plurality of support protrusions provided at the upper surface of the vacuum pad and placed further inside than the ring protrusion,

wherein a height of a top end of the support protrusions is lower than a height of a top end of the ring protrusion and the plurality of support protrusions configured to transmit force to the substrate separating the substrate from the conductive vacuum pad.