Abstract:
An apparatus for monitoring an interior of a process chamber including a process chamber including a chamber body and a view port defined in the chamber body, a cover section including a pinhole in one end, the cover section disposed to correspond to an end portion of the view port, the cover section having a first length in a direction toward a center point of the process chamber, and a sensing unit inserted into the view port to monitor the interior of the process chamber through the pinhole, a region in the process chamber to be sensed by the sensing unit determined based on the first length may be provided.
Abstract:
An apparatus for monitoring an interior of a process chamber including a process chamber including a chamber body and a view port defined in the chamber body, a cover section including a pinhole in one end, the cover section disposed to correspond to an end portion of the view port, the cover section having a first length in a direction toward a center point of the process chamber, and a sensing unit inserted into the view port to monitor the interior of the process chamber through the pinhole, a region in the process chamber to be sensed by the sensing unit determined based on the first length may be provided.
Abstract:
A substrate support unit of an etching process chamber includes a substrate support portion configured to support a substrate, a cathode under the substrate support portion, the cathode including an upper surface portion under the substrate support portion, the upper surface portion being smaller than a size of the substrate, and a step portion positioned a step downward from an edge portion of the upper surface portion, and a focus ring at an edge portion of the substrate, the focus ring being on the step portion and encompassing a side wall of the step portion and an edge portion of the substrate, the focus ring being configured to make a uniform distribution of an electric field on the substrate.