LABORATORY EQUIPMENT; NAMELY, LABORATORY MAGNETIC STIRRING BARS FOR STIRRING OR AGITATING LIQUIDS, OR MIXTURES OF LIQUIDS, OR MIXTURES OF LIQUIDS AND SOLIDS, OR MIXTURES OF LIQUIDS AND GASES, OR MIXTURES OF LIQUIDS AND SOLIDS AND GASES

TREATMENT OF MATERIALS, NAMELY DRYING, SIMULTANEOUSLY CLEANING AND DRYING, SIMULTANEOUSLY ETCHING AND DRYING OF SEMICONDUCTOR WAFERS

[ CHEMICAL COMPOSITIONS, IN LIQUID OR GASEOUS FORM FOR CLEANING AND ETCHING A SEMICONDUCTOR SUBSTRATE ]