IP Library Patent Application 13835073
Patent Application
App. No. 13/835,073

CHEMICAL LIQUID PREPARATION METHOD OF PREPARING A CHEMICAL LIQUID FOR SUBSTRATE PROCESSING, CHEMICAL LIQUID PREPARATION UNIT PREPARING A CHEMICAL LIQUID FOR SUBSTRATE PROCESSING, AND SUBSTRATE PROCESSING SYSTEM

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Patent No.
US None
App. No.
13/835,073
Abstract

A substrate processing system includes a chemical liquid preparation unit preparing a chemical liquid to be supplied to a substrate and a processing unit which supplies the chemical liquid, prepared by the chemical liquid preparation unit, to the substrate. The chemical liquid preparation unit supplies an oxygen-containing gas, containing oxygen gas, to a TMAH-containing chemical liquid, containing TMAH (tetramethylammoniumhydroxide),tomaketheoxygen-containing gas dissolve in the TMAH-containing chemical liquid.

Claims (21)

1 . A chemical liquid preparation method of preparing a chemical liquid for substrate processing, comprising:

a step of supplying an oxygen-containing gas that contains oxygen gas to a TMAH-containing chemical liquid that contains TMAH (tetramethylammonium hydroxide) to make the oxygen-containing gas dissolve in the TMAH-containing chemical liquid.

2 . The chemical liquid preparation method of preparing a chemical liquid for substrate processing according to claim 1 , wherein the oxygen-containing gas is oxygen gas or cleaned dry air.

3 . The chemical liquid preparation method of preparing a chemical liquid for substrate processing according to claim 1 , comprising:

a measurement step of measuring a dissolved oxygen concentration in the TMAH-containing chemical liquid;

a nitrogen dissolution step of supplying a nitrogen-containing gas containing nitrogen gas to the TMAH-containing chemical liquid to make the nitrogen-containing gas dissolve in the TMAH-containing chemical liquid when the dissolved oxygen concentration measured in the measurement step is higher than a predetermined concentration; and

an oxygen dissolution step of supplying the oxygen-containing gas to the TMAH-containing chemical liquid to make the oxygen-containing gas dissolve in the TMAH-containing chemical liquid when the dissolved oxygen concentration measured in the measurement step is lower than the predetermined concentration.

4 . A chemical liquid preparation unit preparing a chemical liquid for substrate processing, comprising:

an oxygen dissolution unit which supplies an oxygen-containing gas that contains oxygen gas to a TMAH-containing chemical liquid that contains TMAH (tetramethylammonium hydroxide) to make the oxygen-containing gas dissolve in the TMAH-containing chemical liquid.

5 . The chemical liquid preparation unit preparing a chemical liquid for substrate processing according to claim 4 , wherein the oxygen-containing gas is oxygen gas or cleaned dry air.

6 . The chemical liquid preparation unit preparing a chemical liquid for substrate processing according to claim 4 , further comprising:

a measurement unit which measures a dissolved oxygen concentration in the TMAH-containing chemical liquid;

a nitrogen dissolution unit which supplies a nitrogen-containing gas containing nitrogen gas to the TMAH-containing chemical liquid to make the nitrogen-containing gas dissolve in the TMAH-containing chemical liquid; and

a controller which controls the nitrogen dissolution unit to make the nitrogen-containing gas dissolve in the TMAH-containing chemical liquid when the dissolved oxygen concentration measured by the measurement unit is higher than a predetermined concentration and controls the oxygen dissolution unit to make the oxygen-containing gas dissolve in the TMAH-containing chemical liquid when the dissolved oxygen concentration measured by the measurement unit is lower than the predetermined concentration.

7 . A substrate processing system comprising:

the chemical liquid preparation unit according to claim 4 ; and

a processing unit which supplies the TMAH-containing chemical liquid, prepared by the chemical liquid preparation unit, to a substrate.

8 . A substrate processing system comprising: the chemical Liquid preparation unit according to claim 5 ; and

a processing unit which supplies the TMAH-containing chemical liquid, prepared by the chemical liquid preparation unit, to a substrate.

9 . A substrate processing system comprising: the chemical liquid preparation unit according to claim 6 ; and

a processing unit which supplies the TMAH-containing chemical liquid, prepared by the chemical liquid preparation unit, to a substrate.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 19, 2015
From: DAINIPPON SCREEN MFG. CO., LTD.
To: SCREEN HOLDINGS CO., LTD.
Reel/Frame 035049/0171 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 28, 2013
From: MIURA, ATSUYASU; ISHIKAWA, HIDEKAZU
To: DAINIPPON SCREEN MFG. CO., LTD.
Reel/Frame 030104/0368 →