Patent ID: 6915809

Claim:
A single wafer type substrate cleaning apparatus for cleaning wafers individually, which are not stored in a cassette, in a sealed cleaning housing, said apparatus comprising: wafer rotary means for supporting and rotating a single wafer in the cleaning housing in a horizontal position; a vertically movable, partitioned cleaning chamber provided at an outer peripheral portion of the wafer rotary means for forming a plurality of selectively operable cleaning treatment spaces for cleaning, in sequential stages, each wafer which is rotatably supported by the wafer rotary means; chemical fluid supply means for supplying chemical fluids to a front face of each wafer which is rotatably supported by the wafer rotary means; purified water supply means for supplying purified water to a back face of each wafer which is rotatably supported by the wafer rotary means; means for sequentially supplying a plurality of chemical fluids from the chemical fluid supply means to the front face of each wafer from above, which wafer is rotatably supported by the wafer rotary means, and means for simultaneously injecting and supplying purified water from the purified water supply means to the back face of each wafer.