Abstract:
The invention is embodied by a plasma reactor for processing a workpiece, including a reactor enclosure (105) defining a processing chamber (100), a semiconductor window (110), a base (120) within the chamber (100) for supporting the workpiece (125) during processing thereof, a gas inlet system (137) for admitting a plasma precursor gas into the chamber (100), and an inductive antenna (145) adjacent a side of the semiconductor window (110) opposite the base (120) for coupling power into the interior of the chamber (100) through the semiconductor window electrode (110).
Abstract:
A method of plasma etching oxide in the presence of nitride includes contacting the oxide with a mixture of gases including one or more fluorine-substituted hydrocarbon etching gases and acetylene. The method exhibits high selectivity to nitride, including nitride on uneven surfaces.
Abstract:
A system and method for removing photoresist or other organic compounds from semiconductor wafers is provided. Non-fluorinated reactant gases (O 2 , H 2 , H 2 O, N 2 etc.) are activated in a quartz tube by a medium pressure surface wave discharge. As the plasma jet impinges on a substrate, volatile reaction products (H 2 O, CO 2 , or low molecular weight hydrocarbons) selectively remove the photoresist from the surface. The medium pressure also enables high gas temperatures that provide an effective source of heat in the reactive zone on the wafer that enhances etch rates and provides a practical means of removing ion implanted photoresist.
Abstract translation:提供了一种用于从半导体晶片去除光致抗蚀剂或其它有机化合物的系统和方法。 非氟化反应气体(O 2 H 2,H 2,H 2 O,N 2等)是 通过中压表面波放电在石英管中激活。 当等离子体射流冲击基板时,挥发性反应产物(H 2 O 2 CO 2 CO 2或低分子量烃)选择性地从表面除去光致抗蚀剂。 介质压力还使得可以在晶片上的反应性区域中提供有效的热源的高气体温度提高了蚀刻速率,并提供了去除离子注入的光致抗蚀剂的实际手段。
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:
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.