Patent ID: 8956463
Filing Date: 2015-02-17
Classification: G03F,Y10S

Abstract:
1. A method for cleaning a substrate to be cleaned by supplying a cleaning fluid to a cleaning apparatus, the method comprising: discharging a built up cleaning fluid, which is built up in a space located on a downstream side of a filter in a cleaning fluid supplying apparatus and filtered by the filter, outside of a system through a discharge pipe; after discharging the built up cleaning fluid, supplying a filtered cleaning fluid to a cleaning apparatus through a supply pipe; cleaning the substrate to be cleaned by filtering the cleaning fluid with the filter for removing foreign matter and supplying the filtered cleaning fluid to the cleaning apparatus through the supply pipe; discharging the filtered cleaning fluid outside of the system through the discharge pipe, and then continuously discharging the cleaning fluid from the discharge pipe until the filtered cleaning fluid starts to be supplied to the cleaning apparatus through the supply pipe; after the filtered cleaning fluid starts to be supplied, continuously discharging a portion of the filtered cleaning fluid through the discharge pipe at the same time while supplying another portion of the filtered cleaning fluid through the supply pipe; when supplying of the filtered cleaning fluid to the cleaning apparatus stops, continuously discharging the filtered cleaning fluid through the discharge pipe; and when one or more substrates are to be cleaned in the cleaning step, continuously discharging the filtered cleaning fluid through the discharge pipe until cleaning of every substrate to be cleaned is completed.