Patent ID: 6293982
Filing Date: 2001-09-25
Classification: B01D,D04H,D06M,F24F

Abstract:
A clean room for manufacturing semiconductors, the clean room having an air filter, the air filter comprising:a filter medium; anda sealing material;wherein the filter medium does not release gaseous organic substances more than about 10 .mu.g/g-sample measured by dynamic headspace-gas chromatography/mass spectroscopy at 150.degree. C. for 30 minutes; and wherein the sealing material does not release gaseous organic substances more than about 50 .mu.g/g-sample measured by dynamic headspace-gas chromatography/mass spectroscopy at 150.degree. C. for 30 minutes;wherein the gaseous organic substances are dibutyl phthalate, dioctyl phthalate, 2-ethylhexyl adipate, 2,6-di-t-butyl-p-cresol, hydrocarbons having fewer than 18 carbon atoms, cyclosiloxanes having fewer than 9 silicon atoms, and tributyl phosphate.