Abstract:
A plasma confining assembly for minimizing unwanted plasma formations in regions outside of a process region in a process chamber is disclosed. The plasma confining assembly includes a first confining element and second confining element positioned proximate the periphery of the process region. The second confining element is spaced apart from the first confining element. The first confining element includes an exposed conductive surface that is electrically grounded and the second confining element includes an exposed insulating surface, which is configured for covering a conductive portion that is electrically grounded. The first confining element and the second confining element substantially reduce the effects of plasma forming components that pass therebetween. Additionally, the plasma confining assembly may include a third confining element, which is formed from an insulating material and disposed between the first confining element and the second confining element, and proximate the periphery of the process region. The third confining element further reduces the effects of plasma forming components that pass between the first confining element and the second confining element.
Abstract:
A high plasma density etch process for etching an oxygen-containing layer overlying a non-oxygen containing layer on a workpiece in a plasma reactor chamber, by providing a chamber ceiling overlying the workpiece and containing a semiconductor material, supplying into the chamber a process gas containing etchant precursor species, polymer precursor species and hydrogen, applying plasma source power into the chamber, and cooling the ceiling to a temperature range at or below about 150 degrees C. The etchant and polymer precursor species contain fluorine, and the chamber ceiling semiconductor material includes a fluorine scavenger precursor material. Preferably, the process gas includes at least one of CHF3 and CH2F2. Preferably, the process gas further includes a species including an inert gas, such as HeH2 or Ar. If the chamber is of the type including a heated fluorine scavenger precursor material, this material is heated to well above the polymer condensation temperature, while the ceiling is cooled. In some cases, the plasma source power applicator is an inductive antenna overlying the semiconductor ceiling, and the ceiling has a cooling/heating apparatus contacting the ceiling through semiconductor rings. The inductive antenna in this case constitutes inductive elements between adjacent ones of the semiconductor rings.
Abstract:
An etch profile tailoring system (100), for use with an etching process carried out on a wafer (130), has a scavenging plate (170) with a baseline etch profile, and at least one etch profile tuning structure (such as a plug) (160) replaceably disposed with respect to the scavenging plate (170) and configured to alter the baseline etch profile during the etching process so as to arrive at a desired etch profile. A method of performing maintenance on an etch profile tailoring system (100) involves the steps of performing an etching process on a wafer in accordance with a desired etch profile, determining whether or not maintenance should be performed, and (if the maintenance decision indicates that maintenance should be performed) replacing with a second plug before conducting an etching process on additional wafers.
Abstract:
One embodiment relates to an apparatus for sputtering material onto a workpiece, the apparatus including a vacuum chamber and a target disposed in the vacuum chamber, the target comprising a material to be deposited onto said workpiece. The apparatus also includes a holder for the workpiece and at least one recyclable process kit component positioned to accumulate material sputtered from the target. The process kit component includes a base metal layer including titanium and an outer layer of titanium nitride. The titanium nitride layer acts as an etch stop during recycling of the process kit component. The process kit component may include a part selected from the group of a shield, pedestal, shutter, coil, collimator, deposition ring, cover ring, and clamp ring.
Abstract:
Because of environmental pollution prevention laws, PFC (perfluorocarbon) and HFC (hydrofluorocarbon), both etching gases for silicon oxide and silicon nitride films, are expected to be subjected to limited use or become difficult to obtain in the future. An etching gas containing fluorine atoms is introduced into a plasma chamber. In a region where plasma etching takes place, the fluorine-containing gas plasma is made to react with solid-state carbon in order to produce molecular chemical species such as CF4, CF2, CF3 and C2F4 for etching. This method assures a high etch rate and high selectivity while keeping a process window wide.
Abstract:
A domed plasma reactor chamber uses an antenna driven by RF energy (LF, MF, or VHF) which is inductively coupled inside the reactor dome. The antenna generates a high density, low energy plasma inside the chamber for etching metals, dielectrics and semiconductor materials. Auxiliary RF bias energy applied to the 10 wafer support cathode controls the cathode sheath voltage and controls the ion energy independent of density. Various magnetic and voltage processing enhancement techniques are disclosed, along with etch processes deposition processes and combined etch/deposition processed. The disclosed invention provides processing of sensitive devices without damage and without microloading, thus providing increased yields.
Abstract:
Because of environmental pollution prevention laws, PFC (perfluorocarbon) and HFC (hydrofluorocarbon), both etching gases for silicon oxide and silicon nitride films, are expected to be subjected to limited use or become difficult to obtain in the future. An etching gas containing fluorine atoms is introduced into a plasma chamber. In a region where plasma etching takes place, the fluorine-containing gas plasma is made to react with solid-state carbon in order to produce molecular chemical species such as CF4, CF2, CF3 and C2F4 for etching. This method assures a high etch rate and high selectivity while keeping a process window wide.
Abstract:
The present invention provides a method of reducing or delaying the exfoliation of deposited films within a vapor deposition system. The method of preventing the delamination of thin films deposited of a vapor deposition chamber components includes the steps of depositing a series of thin films on a discontinuous surface. The internal stress of the deposited thin film laminates are relaxed by fragmenting the deposited thin film laminates into a plurality of discontinuous surfaces. Thus allowing the exfoliation process of the thin film laminates to be delayed.
Abstract:
In a plasma reactor including a reactor chamber, a workpiece support for holding a workpiece inside the chamber during processing and an inductive antenna, a window electrode proximal a wall of the chamber, the antenna and wall being positioned adjacently, the window electrode being operable as (a) a capacitive electrode accepting RF power to capacitively coupled plasma source power into the chamber, and (b) a window electrode passing Rf power therethrough from said antenna into the chamber to inductively couple plasma source power into the chamber.
Abstract:
The present invention provides an apparatus and method, for plasma assisted processing of a workpiece, which provides for separate control of species density within a processing plasma. The present invention has a processing chamber and at least one collateral chamber. The collateral chamber is capable of generating a collateral plasma and delivering it to the processing chamber. To control the densities of the particle species within the processing chamber the present invention may have: a filter interposed between the collateral chamber and the processing chamber, primary chamber source power, several collateral chambers providing separate inputs to the processing chamber, or combinations thereof. Collateral plasma may be: filtered, combined with primary chamber generated plasma, combined with another collateral plasma, or combinations thereof to separately control the densities of the species comprising the processing plasma.