Abstract:
An etch process gas is provided to a main process chamber having an electron beam plasma source, and during periodic passivation operations a remote plasma source provides passivation species to the main process chamber while ion energy is limited below an etch ion energy threshold. During periodic etch operations, flow from the remote plasma source is halted and ion energy is set above the etch threshold.
Abstract:
Plural sensors on an interior surface of a reactor chamber are linked by respective RF communication channels to a hub inside the reactor chamber, which in turn is linked to a process controller outside of the chamber.
Abstract:
An inductively coupled plasma reactor has three concentric coil antennas and a current divider circuit individually controlling currents in each of the three coil antennas by varying two variable impedance elements in the current divider circuit in response to a desired current apportionment among the coil antennas received from a user interface.
Abstract:
An exemplary semiconductor processing system may include a processing chamber and a first plasma source. The first plasma source may utilize a first electrode positioned externally to the processing chamber, and the first plasma source may be configured to generate a first plasma. The processing system may further comprise a second plasma source separate from the first plasma source that utilizes a second electrode separate from the first electrode. The second electrode may be positioned externally to the processing chamber, and the second plasma source may be configured to generate a second plasma within the processing chamber. The processing system may further comprise a showerhead disposed between the relative locations of the first plasma electrode and the second plasma electrode.
Abstract:
An exemplary semiconductor processing system may include a remote plasma source coupled with a processing chamber having a top plate. An inlet assembly may be used to couple the remote plasma source with the top plate and may include a mounting assembly, which in embodiments may include at least two components. The inlet assembly may further include a precursor distribution assembly defining a plurality of distribution channels fluidly coupled with an injection port.
Abstract:
An RF plasma source has a resonator with its shorted end joined to the processing chamber ceiling and inductively coupled to an array of radial toroidal channels in the ceiling.
Abstract:
A plasma reactor has an overhead inductively coupled plasma source with two coil antennas and symmetric and radial RF feeds and cylindrical RF shielding around the symmetric and radial RF feeds. The radial RF feeds are symmetrically fed to the plasma source.
Abstract:
Phase angle between opposing electrodes in a plasma reactor is controlled in accordance with a user selected phase angle. Direct digital synthesis of RF waveforms of different phases for the different electrodes is employed. The synthesis is synchronized with a reference clock. The address generator employed for direct digital synthesis is synchronized with an output clock signal that is generated in phase with the reference clock using a phase lock loop. The phase lock loop operates only during a limited initialization period.
Abstract:
A plasma reactor has an overhead multiple coil antennas including a parallel spiral coil antenna and symmetric and radial RF feeds and cylindrical RF shielding around the symmetric and radial RF feeds. The radial RF feeds are symmetrically fed to the plasma source.
Abstract:
A plasma reactor includes an RF-driven wafer support electrode underlying a process zone and two (or more) counter electrodes overlying the process zone and facing different portions of the process zones, two (or more) variable reactances connected between respective ones of the counter electrodes and ground, and a controller governing the variable reactances to control distribution of a plasma parameter such as plasma ion density or ion energy.