Abstract: The present disclosure is to provide a piston assembly in which a particle does not leak out of a cylinder, and including, in an embodiment, a piston body; a piston rod connected to the piston body; a first groove formed in an outer surface of the piston body; and a particle discharge flow path extending from an internal space of the piston body to the outer surface of the piston body.

Abstract: A substrate treatment apparatus includes: a first bath storing a cleaning solution and having a first opening formed in an upper surface thereof; and a first ultrasonic oscillator installed in the first bath and providing ultrasonic waves toward a surface of the cleaning solution exposed by the first opening to form a water film protruding from the surface of the cleaning solution, wherein a substrate is not immersed in the first bath, and a surface of the substrate is placed adjacent to the first opening and cleaned by the water film.

Abstract: The inventive concept provides a substrate treating apparatus. The substrate treating apparatus includes a support unit configured to support a substrate; and a cleaning unit configured to clean a bottom surface of the substrate supported on the support unit, and wherein the cleaning unit comprises: a body; and a protrusion formed to be upwardly protruding from the body, and the protrusion is positioned to be spaced apart from the bottom surface.

Abstract: The present disclosure is to provide a piston assembly in which a particle does not leak out of a cylinder, and including, in an embodiment, a piston body; a piston rod connected to the piston body; a first groove formed in an outer surface of the piston body; and a particle discharge flow path extending from an internal space of the piston body to the outer surface of the piston body.

Abstract: Provided is a substrate processing apparatus capable of effectively removing contaminants in an edge region of a substrate. The substrate processing apparatus comprises: a support configured to rotate a substrate; a first bath installed around the support and configured to store a cleaning liquid and form a first opening on an upper surface thereof; and a first ultrasonic oscillator installed in the first bath and configured to provide an ultrasonic wave towards a surface of the cleaning liquid exposed by the first opening and form a first water film protruding from the surface of the cleaning liquid, wherein the substrate is not immersed in the first bath, and the edge region of the substrate is cleaned by the protruding first water film while rotating the substrate by the support.

Abstract: A substrate processing apparatus includes a substrate support unit, supporting a substrate, and an ultrasonic cleaning module disposed in a location lower than an upper surface of the substrate support unit. The ultrasonic cleaning module may include a receiving portion receiving a chemical, an opening portion in which at least a portion of an upper surface of the receiving portion is opened, and an ultrasonic vibration unit disposed to be directed toward the opening portion from the receiving portion, and may be configured in such a manner that a liquid surface of the chemical, rising by the ultrasonic vibration unit, touches the substrate through the opening portion.

Abstract: A substrate processing apparatus, which may suppress occurrence of temperature deviation caused by an air current, is provided. The substrate processing apparatus includes a chamber including an upper body and a lower body and having a processing space formed therein by the upper body and the lower body, a substrate support unit disposed in the processing space and having a support surface on which the substrate is supported, a heater disposed to heat gas in the processing space, an introduction unit configured to supply gas toward an edge of the support surface, and a discharge unit configured to discharge the gas in the processing space. The discharge unit may include a plurality of outlets spaced apart from a centerline of the support surface in the upper body and disposed to be closer to the centerline of the support surface than to the introduction unit.

Abstract: Disclosed are a buffer unit, in which a plurality of support plates is stacked in a vertical direction and a connection block is provided between the plurality of support plates to prevent vibration generated at the lower end of the support plate from being transmitted from the upper support plate, and a substrate treating apparatus. According to the present invention, it is possible to reduce the vibration generated in the buffer unit, so that there is an effect of improving the efficiency of the substrate treating process.

Abstract: Disclosed is a cutter apparatus for a double tube for cutting an outer tube in a double pipe including an inner tube and the outer tube, the cutter apparatus for the double tube including: a main body which is grippable by a hand of an operator; a cylindrical protection member which is connected to the main body and into which the inner tube is inserted; and a cutter member including a blade for cutting the outer tube.

Abstract: Provided is a substrate treatment apparatus with improved workability. The substrate treatment apparatus includes: a first bath storing a cleaning solution and having a first opening formed in an upper surface thereof; and a first ultrasonic oscillator installed in the first bath and providing ultrasonic waves toward a surface of the cleaning solution exposed by the first opening to form a water film protruding from the surface of the cleaning solution, wherein a substrate is not immersed in the first bath, and a surface of the substrate is placed adjacent to the first opening and cleaned by the water film.

Abstract: The present disclosure relates to a method for producing graphite oxide and an apparatus therefor.

Abstract: The present disclosure relates to a method for producing graphite oxide and an apparatus therefor.