For fab managers in semi-conductor and photovoltaic (PV) manfacturing, this is a common question. Going back to the basics, to convey a “high purity” gas, the gas system must be free from contaminants and leaks.  At one time (1970’s) copper tubing was sufficient, then chemically cleaned stainless steel was sufficient (1980’s), but finally electropolishing followed by a hot deionized water final clean was established as the best method to achieve a passive, corrosion resistant, and uncontaminated tubing inner surface. High purity is a relative term – in the semi-conductor electronics industry the specification may allow ppb (part per billion) or ppt (part...

Sooner or later it happens at every facility. You get a bad cylinder of gas, a component fails, a cycle purge wasn't properly completed, and your gas panel or a gas line gets contaminated.  The good news is that an effective approach to the problem can save you weeks in downtime. The typical response when a gas line is contaminated is to pull the contaminated section, throw it away, and buy/install a new one. Replacement panels are sold by all the OEMs; then you’ll need to find a contractor to do the install.   But before going down that path, consider the...