Patent ID: 7541285

Claim:
A substrate processing apparatus that performs a predetermined process of a substrate comprising: a) a chamber having a first processing room and a second processing room; b) a partition member that vertically partitions said chamber into said first processing room, and said second processing room; c) a processing part that processes the substrate with a chemical solution in said first processing room; d) a measuring part that measures pressure within said first processing room; and e) a pressure adjusting part that adjusts the pressure within said first processing room, based on a measurement on said measuring part, wherein said processing part comprises: c-1) a processing bath that stores a chemical solution and is disposed within said first processing room; and c-2) a holding part that holds and immerses the substrates in the chemical solution stored in said processing bath, said first processing room and said second processing room are arranged vertically in said chamber relative to each other, and said second processing room is provided with a plurality of deionized water discharging portions through which deionized water is supplied to the substrate.