Abstract:
A plasma processing system for processing at least a substrate with plasma. The plasma processing chamber is capable of controlling ion energy distribution. The plasma processing system may include a first electrode. The plasma processing system also includes a second electrode that is different from the first electrode and is configured for bearing the substrate. The plasma processing system may also include a signal source coupled with the first electrode. The signal source may provide a non-sinusoidal signal through the first electrode to control ion energy distribution at the substrate when the substrate is processed in the plasma processing system, wherein the non-sinusoidal signal is periodic.
Abstract:
A method in a plasma processing system for etching a feature through a given layer on a semiconductor substrate. The method includes placing the substrate in a plasma processing chamber of the plasma processing system. The method also includes flowing an etchant gas mixture into the plasma processing chamber, the etchant gas mixture being configured to etch the given layer. The method additionally includes striking a plasma from the etchant source gas. Furthermore, the method includes etching the feature at least partially through the given layer while applying a bias RF signal to the substrate, the bias RF signal having a bias RF frequency of between about 45 MHz and about 75 MHz. The bias RF signal further has a bias RF power component that is configured to cause the etch feature to be etched with an etch selectivity to a second layer of the substrate that is higher than a predefined selectivity threshold.
Abstract:
PROBLEM TO BE SOLVED: To provide an adjustable height PIF (plasma ion flux) probe for measuring a set of electric characteristics in plasma. SOLUTION: A plasma probe assembly 140 for use in a plasma processing chamber is provided. A semiconductor probe element 304 with a probe surface 308 at a first end of the semiconductor probe element is provided. An electrical connector 312 is electrically connected to the semiconductor probe element 304. An electrically insulating sleeve 316 surrounds at least part of the probe element 304. An adjustment device is connected to a semiconductor probe shaft 352 so that the probe surface 308 is coplanar with an interior chamber surface of the plasma processing chamber. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
A system, method and apparatus for increasing an energy level of the ions emitted from a plasma include a plasma chamber, including a top electrode and a bottom electrode, a multiple RF sources, at least one of the RF sources being coupled to the bottom electrode. A phase locking circuit is coupled to at least two of the RF sources hereafter designated the first RF source and the second RF source. A controller is coupled to the plasma chamber, each of the RF sources and the phase locking circuit. The controller including operating system software, multiple logic circuits and a process recipe.
Abstract:
A device for inductively confining capacitively coupled RF plasma formed in a plasma processing apparatus. The apparatus includes an upper electrode and a lower electrode that is adapted to support a substrate and to generate the plasma between the substrate and the upper electrode. The device includes a dielectric support ring that concentrically surrounds the upper electrode and a plurality of coil units mounted on the dielectric support ring. Each coil unit includes a ferromagnetic core positioned along a radial direction of the dielectric support ring and at least one coil wound around each ferromagnetic core. The coil units generate, upon receiving RF power from an RF power source, electric and magnetic fields that reduce the number of charged particles of the plasma diffusing away from the plasma.
Abstract:
A method of determining an endpoint of a process by measuring a thickness of a layer, the layer being deposited on the surface by a prior process is disclosed. The method includes providing a sensor that is coplanar with the surface, wherein the sensor is configured to measure the thickness. The method also includes exposing the plasma chamber to a plasma, wherein the thickness is changed by the exposing, and determining the thickness as a function of time. The method further includes ascertaining a steady state condition in the thickness, the steady state condition being characterized by a substantially stable measurement of the thickness, a start of the steady state condition representing the endpoint.
Abstract:
In a plasma processing system having a plasma processing chamber, at least one powered electrode and an ignition electrode, a method for igniting a plasma is disclosed. The method includes introducing a substrate into the plasma processing chamber. The method also includes flowing a gas mixture into the plasma processing chamber; energizing the ignition electrode at a strike frequency; and striking a plasma from the gas mixture with the ignition electrode. The method further includes energizing the at least one powered electrode with a target frequency, wherein the strike frequency is greater than the target frequency; and de-energizing the ignition electrode while processing the substrate in the plasma processing chamber.