Patent ID: 11866823
Assignee: ASM IP HOLDING B.V.
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 19:
20. A substrate processing device having a substrate supporting unit configured to accommodate a substrate and a gas supply unit above the substrate supporting unit, the substrate supporting unit comprising:
a base;
a first protrusion adjacent to a periphery of the base and protruding from the base to a first height; and
a second protrusion adjacent to a center of the base and protruding from the base to a second height less than the first height,
wherein the first protrusion surrounds the second protrusion,
wherein an upper surface of the first protrusion comprises a contact surface that comes into contact with an edge of a substrate to be processed,
wherein the second protrusion has an upper surface lower than the contact surface of the first protrusion,
wherein the substrate supporting unit is configured to:
support the substrate to be processed through the contact surface of the first protrusion during a first operation of the substrate processing device, and
support the substrate to be processed through both of the contact surface of the first protrusion and the upper surface of the second protrusion during a second operation of the substrate processing device,

wherein active species are formed when an electric power is supplied between the gas supply unit and the substrate supporting unit, and
wherein the second protrusion is configured to relocate the active species adjacent to the second protrusion such that the active species are arranged around a center of the substrate to be processed,
wherein the substrate processing device further comprises a suction force generator generating a suction force,
wherein, when the substrate to be processed is deformed due to the suction force, the deformed substrate is in line contact with the first protrusion and at the same time in contact with the second protrusion so that the line contact of the substrate by the first protrusion is maintained to prevent flow of reactive gas into the backside of the substrate to be processed and the second protrusion supports the substrate to be processed during the deformation.