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Materials

Showa Denko To Make LCD Cleaning Gas

by Jean-François Tremblay
January 17, 2011 | APPEARED IN VOLUME 89, ISSUE 3

Showa Denko has started construction of a 400-metric-ton-per-year plant to produce environmentally friendly carbonyl fluoride (COF2) gas for use in manufacturing liquid-crystal displays. It expects the new facility to come on-line this summer in Japan. LCD manufacturers now use nitrogen trifluoride and sulfur hexafluoride as etching and cleaning gases, but both have a significantly higher global-warming impact than COF2, which has the same impact as carbon dioxide. So far, few companies make COF2, but Showa Denko claims it has solved the purification issues involved.

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