Patent ID: 11897007
Assignee: SEMES CO., LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC B  H | IPC B  H

Claim 13:
14. An apparatus for processing a substrate, comprising:
a base portion capable of horizontal rotation;
a holding module located on the base portion and configured to hold a substrate;
a nozzle module located above the base portion and configured to jet a chemical liquid onto the substrate on the holding module; and
a scattering prevention module located on the base portion at a peripheral portion of the holding module and configured to, when the chemical liquid is scattered after being jetted onto the substrate, guide the scattered chemical liquid to be discharged by a variable movement of the scattering prevention module being moved inwardly or outwardly by a centrifugal force due to the horizontal rotation,
wherein:
the scattering prevention module includes a support portion supported on the base portion, a body portion provided on the peripheral portion of the holding module via the support portion, and a movable portion provided at an upper portion of the body portion and configured to be movable inwardly or outwardly to perform the variable movement,
the movable portion performs the variable movement based on rotation between an internal side and an outer side of the body portion and the centrifugal force, wherein a degree to which the chemical liquid is scattered from the substrate is increased in response to a rotation speed of the base portion,
a degree of the variable movement of the movable portion is increased in response to the rotation speed of the base portion,
the movable portion is formed in a shape rounded outwardly,
the movable portion further includes a first movable member directly interlocked with the base portion and a second movable member rotatably provided at an upper portion of the first movable member and configured to perform the variable movement based on the centrifugal force, and
the movable portion includes a third movable member rotatably provided at an upper portion of the second movable member and configured to perform the variable movement based on the centrifugal force.