A method and system for reducing lexical ambiguity in an input stream are described. In one embodiment, a user selects a major axis length for the tire mold, then selects a ratio of the major axis length to a minor axis length. The fluorine diffusion barrier layer may be used to essentially prevent fluorine from being diffused into a specific pattern formed of a metal or tetra-ethyl-ortho-silicate layer and thus to prevent corrosion and void formation that might otherwise be caused by HF. Finally, electromagnetic waves from the first conductor and the second conductor radiate into the vacuum chamber, generating plasma in the vacuum chamber and processing a substrate placed on the electrode within the vacuum chamber. In one embodiment a control diaphragm is include on the inlet side of the flowing medium.