Patent ID: 6966949

Claim:
An apparatus for drying under reduced pressure that dries a solvent in a coating liquid by placing a substrate having the coating liquid applied in a pressure-reduced atmosphere, comprising: an airtight container in which a substrate mount portion for mounting the substrate is provided to place the substrate in the pressure-reduced atmosphere; a straightening vane provided so as to face a surface of the substrate mounted on said substrate mount portion with a gap interposed, and having a size the same as or larger than an effective area of the substrate; means for evacuating and reducing pressure in said airtight container; an exhaust flow rate regulating portion for regulating a flow rate of an exhaust for pressure reduction; and a control portion outputting a flow rate set value for said exhaust flow rate regulating portion, and varying the flow rate set value at least in two steps while the solvent is actively evaporating from said coating liquid, wherein said control portion stores data corresponding to a pattern of the flow rate set value while the solvent is actively evaporating from said coating liquid, for each type of the coating liquid.