Abstract:
A plasma source assembly for use with a processing chamber includes a blocker plate with a first set of apertures within an inner electrical center of the blocker plate and smaller apertures around the outer peripheral edge. The apertures can decrease gradually in diameter from the electrical center outward to the peripheral edge or can be in discrete increments with the smallest at the outer peripheral edge.
Abstract:
Embodiments of the present invention generally relates to substrate supports for use in a plasma processing chamber. The substrate supports, which are metallic, have ceramic inserts to prevent arcing between the substrate support and the shadow frame used to protect the edges of the substrate support during processing. In large area substrate processing chambers, the shadow frame may comprise multiple pieces. The individual pieces may be coupled together, but spaced slightly apart by a gap to permit thermal expansion. Ceramic inserts are positioned on the substrate support so that when a shadow frame is positioned adjacent thereto, the ceramic inserts are located adjacent the gaps in the shadow frame. The ceramic inserts adjacent the gap prevent and/or reduce the arcing because the gaps are located over electrically insulating material rather than electrically conductive material.
Abstract:
The embodiments provide apparatus and methods for removal of etch byproducts, dielectric films and metal films near the substrate bevel edge, and chamber interior to avoid the accumulation of polymer byproduct and deposited films and to improve process yield. In an exemplary embodiment, a plasma processing chamber configured to clean a bevel edge of a substrate is provided. The plasma processing chamber includes a substrate support configured to receive the substrate. The plasma processing chamber also includes a bottom edge electrode surrounding the substrate support. The bottom edge electrode and the substrate support are electrically isolated from one another by a bottom dielectric ring. A surface of the bottom edge electrode facing the substrate is covered by a bottom thin dielectric layer. The plasma processing chamber further includes a top edge electrode surrounding a top insulator plate opposing the substrate support. The top edge electrode is electrically grounded. A surface of the top edge electrode facing the substrate is covered by a top thin dielectric layer. The top edge electrode and the bottom edge electrode oppose one another and are configured to generate a cleaning plasma to clean the bevel edge of the substrate.
Abstract:
In a plasma processing apparatus including an upper electrode arranged above a sample stage on which a sample to be processed in a processing chamber is mounted to supply an electric field, and a high frequency power supply to output first high frequency power to form the electric field to the upper electrode, an insulating layer has an impedance smaller than the impedance of the feeding path for bias or the feeding path for electrostatic chuck and a current of the first high frequency power flows through a circuit that passes through the conductive plate and a member constituting an inner sidewall surface of the processing chamber from the upper electrode via the top surface of the sample stage to return to the high frequency power supply.
Abstract:
The invention relates to a method for fragmenting and/or weakening material by means of high-voltage pulses, the material and a processing fluid being arranged in a processing zone formed between two electrodes such that the entire processing zone is flooded with processing fluid, and high-voltage pulses being applied to the electrodes such that high-voltage breakdowns occur between the two electrodes and/or such that predischarge channels are formed without breakdowns. An electrode with a metallic conductor is chosen for at least one of the two electrodes, the conductor being provided partially or completely with an insulator or insulating coating at the working end of the electrode that is in contact with the processing fluid, the permittivity of the insulator/insulating coating being at least 75% of the permittivity of the processing fluid.
Abstract:
In plasma activated chemical vapour deposition a plasma decomposition unit is used that is arranged in or connected to a vacuum vessel having a relatively low pressure or vacuum, to which an operating gas is provided. Periodically repeated voltage pulses are applied between the anode and the cathode of the plasma decomposition unit in such a manner that pulsed electric discharges are produced between the cathode and the surrounding anode of the plasma decomposition unit. The anode is arranged in a special way so that at least a portion thereof will obtain only an electrically conductive coating or substantially no coating when operating the unit. For that purpose, the anode includes a portion located in the direct vicinity of the free surface of the cathode. The portion is a flange or edge portion which is located or extends over margins of the free surface of the cathode. In that way, the anode will include a portion that is shielded for direct coating with particles from the plasma formed and that hence will obtain e.g. substantially no dielectric coating at all.
Abstract:
According to embodiments, an inner electrode having a plurality of gas holes includes a first contact surface provided to a part of an outer peripheral surface. An outer electrode includes a second contact surface provided to a part of an inner peripheral surface, corresponding to the first contact surface of the inner electrode. The inner electrode and the outer electrode come into contact with each other on the first and second contact surfaces. A brazing filler metal is filled in a brazing filler metal filling hole that reaches from front side main surfaces of the inner electrode and the outer electrode to the contact surfaces to join the inner electrode and the outer electrode.
Abstract:
A plasma etching apparatus includes an electrostatic chuck and an etching gas supply unit for supplying an etching gas to a processing space between a first and a second electrode to perform a dry etching process on the target object. The apparatus further includes a cleaning gas supply unit for supplying a cleaning gas to a processing space; a first high frequency power supply unit for supplying a first high frequency power to the first electrode; and a controller for controlling the first high frequency power supply unit such that a first period during which the first high frequency power has a first amplitude that generates the plasma and a second period during which the first high frequency power has a second amplitude that generates substantially no plasma are alternately repeated at a specific cycle when the plasma cleaning is performed in the processing chamber without the target object.
Abstract:
A discharge surface treatment apparatus supplies an electrode material to a surface of a treatment target member by generating pulsating discharges across an inter-electrode gap to form a coating of the electrode material, and includes a switching element that turns application of a voltage from a power source to the inter-electrode gap on/off, a capacitance element that is connected to the switching element in parallel with the inter-electrode gap, an inductance element that is connected in series between both of the switching element and the capacitance element and the inter-electrode gap, and a control unit that includes a function of periodically performing on/off so that an induced electromotive force generated in the inductance element due to a change in the current of discharge generated across the inter-electrode gap can be used as a voltage that induces the next discharge
Abstract:
Embodiments of the present invention generally relates to substrate supports for use in a plasma processing chamber. The substrate supports, which are metallic, have ceramic inserts to prevent arcing between the substrate support and the shadow frame used to protect the edges of the substrate support during processing. In large area substrate processing chambers, the shadow frame may comprise multiple pieces. The individual pieces may be coupled together, but spaced slightly apart by a gap to permit thermal expansion. Ceramic inserts are positioned on the substrate support so that when a shadow frame is positioned adjacent thereto, the ceramic inserts are located adjacent the gaps in the shadow frame. The ceramic inserts adjacent the gap prevent and/or reduce the arcing because the gaps are located over electrically insulating material rather than electrically conductive material.