Patent ID: 8033801

Claim:
A chemical liquid supply system, comprising: a pump having a pump chamber, an intake port that is connected to the pump chamber, a discharge port that is connected to the pump chamber, and a volume manipulator configured to manipulate a volume of the pump chamber; a port operator configured to electrically operate an opening and a closing of the intake port and the discharge port; a volume measuring device configured to measure an amount of the volume of the pump chamber; and a controller configured to control the volume manipulator and the port operator for the pump to perform suction of a liquid from the intake port and to discharge the liquid from the discharge port, wherein the controller includes an adjuster configured to adjust a manipulation of the volume manipulator for reducing a fluctuation of the volume manipulator, using an amount of the fluctuation previously measured by the volume measuring device, and the amount of the fluctuation is a difference between a first volume at a completion of the suction and a second volume at a start of the discharge.