METHOD AND DEVICE FOR TRANSFERRING THIN PLATE-LIKE SUBSTRATE

摘要

A method and device by which the yield of a thin plate-like substrate of a semiconductor integrated circuit, liquid crystal panel, etc., is improved by always transferring the substrate to each processing device in a highly clean damage-free state when the substrate is subjected to various kinds of treatment. A substrate is transferred through a gas tunnel through which a purging gas composed of in insert gas or a mixed gas of an inert gas and oxygen gas is made to flow. The concentrations of impurities in the gas tunnel are measured with a semiconductor laser detector, and the transfer of the substrate is controlled based on the obtained measured data.