Claims
- 1. A method for producing an aluminum solid electrolytic capacitor, comprising cutting a chemically formed aluminum substrate having thereon an aluminum oxide dielectric film into a predetermined shape, treating the chemically formed aluminum substrate with an aqueous acid solution to dissolve a part of the dielectric film on the substrate surface, and providing an organic electrically conducting polymer as a solid electrolyte on the chemically formed aluminum substrate.
- 2. A method for producing an aluminum solid electrolytic capacitor, comprising cutting a chemically formed aluminum substrate having thereon an aluminum oxide dielectric film into a predetermined shape, treating the chemically formed aluminum substrate with an aqueous acid solution to dissolve a part of the dielectric film on the substrate surface and burrs generated during cutting, and providing an organic electrically conducting polymer as a solid electrolyte on a chemically formed aluminum substrate.
- 3. The method for producing an aluminum solid electrolytic capacitor as claimed in claim 1 or 2, wherein the aqueous acid solution comprises an acid selected from the group consisting of sulfuric acid, oxalic acid, chromic acid and phosphoric acid.
- 4. The method for producing an aluminum solid electrolytic capacitor as claimed in claim 3, wherein the aqueous acid solution is an aqueous oxalic acid solution.
- 5. The method for producing an aluminum solid electrolytic capacitor as claimed in claim 4, wherein a concentration of the aqueous oxalic acid solution is from about 0.1 to about 15% by mass.
- 6. The method for producing an aluminum solid electrolytic capacitor as claimed in claim 1 or 2, wherein the treatment with an aqueous acid solution is a dipping treatment of the chemically formed aluminum substrate.
- 7. The method for producing an aluminum solid electrolytic capacitor as claimed in claim 6, wherein the aqueous acid solution is an aqueous oxalic acid solution having a concentration of about 0.1 to about 15% by mass, a dipping time is from about 20 seconds to about 10 minutes, and a treatment temperature is from about 15 to about 40° C.
- 8. The method for producing an aluminum solid electrolytic capacitor as claimed in claim 1 or 2, further comprising chemically re-forming the aluminum cut surface after the treatment with an aqueous acid solution.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2000-153559 |
May 2000 |
JP |
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CROSS REFERENCE TO RELATED APPLICATIONS
This application is an application filed under 35 U.S.C. §111(a) claiming benefit pursuant to 35 U.S.C. §119(e)(1) of the filing date of Provisional Application 60/244,878 filed Nov. 2, 2000 pursuant to 35 U.S.C. §111(b).
US Referenced Citations (5)
Foreign Referenced Citations (3)
Number |
Date |
Country |
2-15611 |
Jan 1990 |
JP |
8-3156 |
Jan 1996 |
JP |
10-32145 |
Feb 1998 |
JP |
Provisional Applications (1)
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Number |
Date |
Country |
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60/244878 |
Nov 2000 |
US |