A VIBRATION DAMPER OR ISOLATOR

摘要

A system for use in for example the production of semiconductors comprises a chamber (10) having a sealed inner space (11), such as a vacuum chamber. A heavy mass (14), such as a table, is arranged within the vacuum chamber and is supported or carried by one or more vibration dampers or isolators (15). Each vibration isolator comprises a hollow or tubular member (18) having an open inner end portion, which extends into the sealed space of the chamber (10). A support structure (21) is arranged at the inner end of the hollow member for supporting the mass or table (14). The opposite ends of a bellows (24) are sealingly connected to the hollow member (18) and the support structure (21), respectively, so as to seal the inner space (26) of the hollow member (18) from the inner space (11) of the chamber (10). A surface part of the support structure is exposed to a to a gas pressure different from that of the sealed inner space of the chamber, so as to at least partly balance the weight of the support structure (21) and the mass or payload (14) supported thereby.