Abstract:
A gas distribution system for uniformly or non-uniformly distributing gas across the surface of a semiconductor substrate. The gas distribution system includes a support plate and a showerhead which are secured together to define a gas distribution chamber therebetween. A baffle assembly including one or more baffle plates is located within the gas distribution chamber. The baffle arrangement includes a first gas supply supplying process gas to a central portion of the baffle chamber and a second gas supply supplying a second process gas to a peripheral region of the baffle chamber. Because the pressure of the gas is greater at locations closer to the outlets of the first and second gas supplies, the gas pressure at the backside of the showerhead can be made more uniform than in the case with a single gas supply. In one arrangement, the first and second gas supplies open into a plenum between a top baffle plate and a temperature controlled support member wherein the plenum is divided into the central and peripheral regions by an O-ring. In a second arrangement, the first gas supply opens into the central region above an upper baffle plate and the second gas supply opens into the periphery of a plenum between the upper baffle plate and a lower baffle plate.
Abstract:
A plasma processing chamber is provided which provides improved wafer area pressure control. The plasma processing chamber is a vacuum chamber with a device connected for generating and sustaining a plasma. Part of this device would be an etchant gas source and an exhaust port. A confinement ring defines an area above a wafer. The wafer area pressure is dependent on the pressure drop across the confinement ring. The confinement ring is part of a confinement device that provides wafer area pressure control greater than 40 %. Such a confinement device may be a fixed vertical restriction ring in addition to the confinement ring, where the confinement ring is adjustable. In the alternative, three adjustable confinement rings may be used to provide the desired wafer area pressure control.
Abstract:
A gas distribution system for uniformly or non-uniformly distributing gas across the surface of a semiconductor substrate. The gas distribution system includes a support plate (20) and a showerhead (22) which are secured together to define a gas distribution chamber (24) therebetween. A baffle assembly (26) including one or more baffle plates is located within the gas distribution chamber. The baffle arrangement includes a first gas supply (40) supplying process gas to a central portion (42) of the baffle chamber and a second gas supply (44) supplying a second process gas to a peripheral region (46) of the baffle chamber. Because the pressure of the gas is greater at locations closer to the outlets of the first and second gas supplies, the gas pressure at the backside of the showerhead can be made more uniform than in the case with a single gas supply.
Abstract:
An integrated gas flow control assembly for connecting a gas distribution system to a multi-zone injector which includes: a first set of channels connecting the gas distribution system to a first valve assembly, a second valve assembly, a third flow assembly, and a fourth flow assembly; a second set of channels for connecting the third flow assembly and the first valve assembly to a first multi-zone injector zone; and a third set of channels for connecting the fourth flow assembly and the second valve assembly to a second multi-zone injector zone. If the first valve assembly is closed, a first multi-zone injector zone flow rate is about the flow rate through the third flow assembly, and if the second valve assembly is closed, a second multi-zone injector zone flow rate is about the flow rate through the fourth flow assembly.
Abstract:
A linear drive assembly for moving a body associated with processing a substrate is disclosed. The linear drive assembly includes a first gear (152) and a second gear (154), which is operatively engaged with the first gear. The linear drive assembly further includes a positioning member (158) having a first portion (160) and a second portion (162). The first portion is movably coupled to the second gear in a linear direction, and the second portion is fixed to a component associated with processing a substrate.
Abstract:
A method of coating the inner surfaces of gas passages of a gas delivery system for a plasma process system such as a plasma etching system includes (a) flowing a fluidic precursor of a corrosion-resistant material through the gas passages and depositing a layer of the fluidic precursor to completely coat the inner surfaces of the gas passages; (b) removing excess fluidic precursor from the inner surfaces; (c) curing the deposited layer of the fluidic precursor to form a corrosion-resistant material coating.
Abstract:
A component useful for a plasma reaction chamber includes a heat sink such as a temperature-controlled support member (22) and a heated member such as an electrically powered showerhead electrode (20). The showerhead electrode is peripherally secured to the support member to enclose a gas distribution chamber between a top surface (30) of the electrode and a bottom surface (32) of the support member. A heat transfer member (36) extends between the electrode and the support member and transfers heat from an area of highest temperature buildup on the top surface of the showerhead electrode to the bottom surface of the support member in order to control the temperature distribution across the showerhead electrode.
Abstract:
A plasma processing system for processing a substrate is disclosed. The system includes a process component capable of effecting a plasma inside a process chamber. The system also includes a gear drive assembly for moving the process component in a linear direction during processing of the substrate.
Abstract:
A gas delivery system for a plasma process system such as a plasma etching system wherein inner surfaces of gas passages are coated with a corrosion-resistant material coating formed by curing a layer of fluidic precursor deposited on the inner surfaces. The coating can be formed by (a) flowing a fluidic precursor of a corrosion-resistant material through the gas passages and depositing a layer of the fluidic precursor to completely coat the inner surfaces of the gas passages; (b) removing excess fluidic precursor from the inner surfaces; (c) curing the deposited layer of the fluidic precursor to form a corrosion-resistant material coating.
Abstract:
A gas distribution system for uniformly or non-uniformly distributing gas across the surface of a semiconductor substrate. The gas distribution system includes a support plate and a showerhead which are secured together to define a gas distribution chamber therebetween. A baffle assembly including one or more baffle plates is located within the gas distribution chamber. The baffle arrangement includes a first gas supply supplying process gas to a central portion of the baffle chamber and a second gas supply supplying a second process gas to a peripheral region of the baffle chamber. Because the pressure of the gas is greater at locations closer to the outlets of the first and second gas supplies, the gas pressure at the backside of the showerhead can be made more uniform than in the case with a single gas supply. In one arrangement, the first and second gas supplies open into a plenum between a top baffle plate and a temperature controlled support member wherein the plenum is divided into the central and peripheral regions by an O-ring. In a second arrangement, the first gas supply opens into the central region above an upper baffle plate and the second gas supply opens into the periphery of a plenum between the upper baffle plate and a lower baffle plate.