Helium - ( He )

Founded in 2015, Shanghai Wechem Technology Limited (wechem.cn) trades, manufactures and services a very broad line of specialty and electronic gases. Its catalog spans process gases (nitrous oxide, phosphine, hydrogen, helium, arsine, germane), fluorinated halocarbons and etching gases (tungsten and molybdenum hexafluoride, boron tribromide/trichloride, sulfur hexafluoride, various perfluorocarbons), high-purity industrial gases (nitrogen, oxygen, argon, neon, krypton, xenon difluoride), and semiconductor process chemicals such as KOH developer, ITO and aluminum etchants, electronic-grade tetramethylammonium hydroxide, and ethyl silicate. The company offers other contract customization under its own brand, emphasizing delivery terms, willingness to meet buyers' specifications, small-order acceptance and service quality, and sells across Asia, the Middle East, Africa, North and South America, Western and Eastern Europe and Australasia.