Cleaning method and method for manufacturing electronic device
First Claim
Patent Images
1. A cleaning method, comprising:
- producing an oxidizing solution by electrolysis of sulfuric acid, the oxidizing solution including sulfuric acid and oxidizing substances, and the sulfuric acid having a concentration of 90% by mass or more;
generating heat of mixing by mixing the oxidizing solution with a hydrogen peroxide solution; and
cleaning a workpiece with the oxidizing solution which is heated by heat of mixing and is supplied while rotating the workpiece and discharging the oxidizing solution from a movable nozzle to the rotating workpiece,the mixing the oxidizing solution and the hydrogen peroxide solution being performed at one of in a nozzle section having the movable nozzle and on the workpiece, anda mixing ratio of the oxidizing solution to the hydrogen peroxide solution being in the range of 1;
1 to 1;
5.
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Abstract
A cleaning method includes: producing an oxidizing solution by electrolysis of sulfuric acid; and cleaning a workpiece with the oxidizing solution. The oxidizing solution is heated by heat of mixing to clean the workpiece. A method for manufacturing an electronic device includes: producing a workpiece; producing an oxidizing solution by electrolysis of sulfuric acid; and cleaning the workpiece with the oxidizing solution. The oxidizing solution is heated by heat of mixing to clean the workpiece.
8 Citations
17 Claims
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1. A cleaning method, comprising:
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producing an oxidizing solution by electrolysis of sulfuric acid, the oxidizing solution including sulfuric acid and oxidizing substances, and the sulfuric acid having a concentration of 90% by mass or more; generating heat of mixing by mixing the oxidizing solution with a hydrogen peroxide solution; and cleaning a workpiece with the oxidizing solution which is heated by heat of mixing and is supplied while rotating the workpiece and discharging the oxidizing solution from a movable nozzle to the rotating workpiece, the mixing the oxidizing solution and the hydrogen peroxide solution being performed at one of in a nozzle section having the movable nozzle and on the workpiece, and a mixing ratio of the oxidizing solution to the hydrogen peroxide solution being in the range of 1;
1 to 1;
5. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for manufacturing an electronic device, comprising:
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forming a workpiece; producing an oxidizing solution by electrolysis of sulfuric acid, the oxidizing solution including sulfuric acid and oxidizing substances, and the sulfuric acid having a concentration of 90% by mass or more; generating heat of mixing by mixing the oxidizing solution with a hydrogen peroxide solution; and cleaning the workpiece with the oxidizing solution which is heated by heat of mixing and is supplied while rotating the workpiece and discharging the oxidizing solution from a movable nozzle to the rotating workpiece, the mixing the oxidizing solution and the hydrogen peroxide solution being performed at one of in a nozzle section having the movable nozzle and on the workpiece, and a mixing ratio of the oxidizing solution to the hydrogen peroxide solution being in the range of 1;
1 to 1;
5. - View Dependent Claims (14, 15, 16, 17)
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Specification