Patent ID: 8365768

Claim:
A fluidic device unit comprising: a plurality of pure-water opening and closing valves; a plurality of chemical-solution opening and closing valves which correspond to the plurality of pure-water opening and closing valves, respectively; and a base member including a pure-water circulation supply line and a chemical-solution circulation supply line, the plurality of pure-water opening and closing valves and the plurality of chemical-solution opening and closing valves being integrated via the base member, wherein the base member further includes a plurality of pure-water branch pipes that connect the plurality of pure-water opening and closing valves, respectively, with the pure-water circulation supply line, a plurality of chemical-solution branch pipes that connect the plurality of chemical-solution opening and closing valves, respectively, with the chemical-solution circulation supply line, a plurality of chemical-solution branch pipe outlets that are connected, respectively, to the plurality of chemical-solution opening and losing valves, and a plurality of inclined channels that connect the plurality of pure-water opening and closing valves, respectively, with the plurality of chemical-solution opening and closing valves, the plurality of inclined channels guiding pure-water from the pure-water opening and closing valves, respectively, to the chemical-solution opening and closing valves which are, respectively, located lower than the pure-water opening and closing valves, wherein the chemical-solution flows through the chemical-solution branch pipe outlets when the chemical-solution opening and closing valves are opened, respectively, and wherein the pure-water flows through the chemical-solution branch pipe outlets when the chemical-solution opening and closing valves are closed and the pure-water opening and closing valves are opened, respectively.