Substrate liquid processing apparatus, substrate liquid processing method, and storage medium
First Claim
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1. A method of performing a liquid processing on substrates, the method comprising:
- processing the substrates using a phosphoric acid aqueous solution having a predetermined concentration of phosphoric acid in a liquid processing unit including a bath that stores the processing liquid and the substrates;
supplying the phosphoric acid aqueous solution to the liquid processing unit by a processing liquid supply including a supply pump;
detecting an intensity of a boiling state of the phosphoric acid aqueous solution by a boiling state detector including a back pressure indicator provided in the liquid processing unit, the back pressure indicator configured to detect a back pressure of an inert gas within the bath; and
controlling the supply pump based on a signal from the boiling state detector by a controller and adjusting a pressure of the phosphoric acid aqueous solution in a flow path supplied from the processing liquid supply to the liquid processing unit, such that the intensity of the boiling state of the phosphoric acid may be adjusted to a desired intensity level while the predetermined concentration of the phosphoric acid in the phosphoric acid aqueous solution is unchanged.
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Abstract
A substrate liquid processing apparatus includes a liquid processing unit, a processing liquid circulating line, and a boiling state detecting unit provided in a processing bath of the liquid processing unit. The controller controls a supply pump of the processing liquid circulating line based on a signal from the boiling state detecting unit, and adjusts a pressure of a supplied phosphoric acid aqueous solution in a flow path so as to adjust the boiling state of the phosphoric acid aqueous solution to a desired state.
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7 Claims
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1. A method of performing a liquid processing on substrates, the method comprising:
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processing the substrates using a phosphoric acid aqueous solution having a predetermined concentration of phosphoric acid in a liquid processing unit including a bath that stores the processing liquid and the substrates; supplying the phosphoric acid aqueous solution to the liquid processing unit by a processing liquid supply including a supply pump; detecting an intensity of a boiling state of the phosphoric acid aqueous solution by a boiling state detector including a back pressure indicator provided in the liquid processing unit, the back pressure indicator configured to detect a back pressure of an inert gas within the bath; and controlling the supply pump based on a signal from the boiling state detector by a controller and adjusting a pressure of the phosphoric acid aqueous solution in a flow path supplied from the processing liquid supply to the liquid processing unit, such that the intensity of the boiling state of the phosphoric acid may be adjusted to a desired intensity level while the predetermined concentration of the phosphoric acid in the phosphoric acid aqueous solution is unchanged. - View Dependent Claims (2, 3, 4, 7)
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5. A method of performing a liquid processing on substrates, the method comprising:
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processing the substrates using a phosphoric acid aqueous solution having a predetermined concentration of phosphoric acid in a liquid processing unit including a bath that stores the phosphoric acid aqueous solution and the substrates; supplying the phosphoric acid aqueous solution to the liquid processing unit by a processing liquid supply including a supply pump; detecting an intensity of a boiling state of the phosphoric acid aqueous solution by a boiling state detector including a back pressure indicator provided in the liquid processing unit, the back pressure indicator configured to detect a back pressure of an inert gas within the bath; and controlling the supply pump based on a signal from the boiling state detector by a controller and adjusting a pressure of the phosphoric acid aqueous solution in a flow path supplied from the processing liquid supply to the liquid processing unit, such that the intensity of the boiling state of the phosphoric acid may be adjusted to a desired intensity level, and wherein the processing liquid supply includes a processing liquid circulating line connected to the liquid processing unit, and the supply pump is provided in the processing liquid circulating line. - View Dependent Claims (6)
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Specification