Patent ID: 11890652
Assignee: EBARA CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  H | IPC B

Claim 1:
2. The cleaning chemical liquid supply method as claimed in claim 1,
wherein control of the flow rates of the first chemical liquid and the dilution water to the first mixer includes performing feedback control based on the respective flow rates of the first chemical liquid and the dilution water supplied to the first mixer,
control of the flow rates of the first chemical liquid and the dilution water to the second mixer includes performing feedback control based on the respective flow rates of the first chemical liquid and the dilution water supplied to the second mixer,
control of the flow rates of the second chemical liquid and the dilution water to the third mixer includes performing feedback control based on the respective flow rates of the second chemical liquid and the dilution water supplied to the third mixer, and
control of the flow rates of the second chemical liquid and the dilution water to the fourth mixer includes performing feedback control based on the respective flow rates of the second chemical liquid and the dilution water supplied to the fourth mixer.