Claims
- 1. A solid electrolytic capacitor element comprising (1) a valve-acting metal substrate having on a surface thereof a dielectric film with an edge part acting as an anode, (2) an insulating layer circumferentially provided on said valve-acting metal substrate, (3) a solid electrolyte layer and (4) an electrically conducting layer comprising a carbon paste layer and a metal powder-containing electrically conducting layer, said solid electrolyte layer and said electrically conducting layer being formed in this order on an entire surface of the substrate on a side opposite said anode with respect to the insulating layer and acting as a cathode part, wherein said metal powder-containing electrically conducting layer is provided within a region of the carbon paste layer, such that said metal powder-containing electrically conducting layer does not contact the insulating layer.
- 2. A solid electrolytic capacitor element comprising (1) a valve-acting metal substrate having on a surface thereof a dielectric film with an edge part acting as an anode, (2) an insulating layer circumferentially provided on said valve-acting metal substrate, (3) a solid electrolyte layer and (4) an electrically conducting layer comprising a carbon paste layer and a metal powder-containing electrically conducting layer, said solid electrolyte layer and said electrically conducting layer being formed in this order on an entire surface of the substrate on a side opposite said anode with respect to the insulating layer and acting as a cathode part, wherein said metal powder-containing electrically conducting layer is provided with a spacing from a cathode side edge part of said insulating layer.
- 3. The solid electrolytic capacitor element as claimed in claim 2, wherein the spacing between said metal powder-containing electrically conducting layer and the cathode side edge part of said insulating layer is about {fraction (1/10)} or more but less than ½ of the entire length of said cathode part.
- 4. The solid electrolytic capacitor element as claimed in claim 2, wherein the spacing between said metal powder-containing electrically conducting layer and the cathode side edge part of said insulating layer is from about 0.1 to about 1.5 mm.
- 5. The solid electrolytic capacitor element as claimed in claim 1, wherein said metal powder-containing electrically conducting layer comprises an electrically conducting filler comprising metal powder, and a fluororubber as a main component of a binder.
- 6. The solid electrolytic capacitor element as claimed in claim 5, wherein about 80% by mass or more of the binder is fluororubber.
- 7. The solid electrolytic capacitor element as claimed in claim 5, wherein about 80% by mass or more of the electrically conducting filler is silver powder.
- 8. The solid electrolytic capacitor element as claimed in claim 5, wherein said metal powder-containing electrically conducting layer comprises from about 80 to about 95% by mass of the electrically conducting filler and from about 5 to about 50% by mass of the binder.
- 9. The solid electrolytic capacitor element as claimed in claim 1, wherein the carbon paste layer comprises an electrically conducting carbon material, a binder and a solvent as main components, about 80% by mass or more of said electrically conducting carbon material is an artificial graphite, and said binder comprises a material having rubber elasticity.
- 10. The solid electrolytic capacitor element as claimed in claim 1, wherein the valve-acting metal has a plate or foil shape.
- 11. The solid electrolytic capacitor element as claimed in claim 1, wherein the valve-acting metal is an elemental metal selected from the group consisting of aluminum, tantalum, niobium and titanium, or the valve-acting metal is an alloy of said elemental metal.
- 12. The solid electrolytic capacitor element as claimed in claim 1, wherein the solid electrolyte layer comprises an electrically conducting polymer layer.
- 13. The solid electrolytic capacitor element as claimed in claim 12, wherein the electrically conducting polymer layer comprises a polymer of a 5-member heterocyclic ring-containing compound.
- 14. The solid electrolytic capacitor element as claimed in claim 13, wherein the 5-member heterocyclic ring-containing compound comprises a structure of bivalent thiophene skeleton.
- 15. The solid electrolytic capacitor element as claimed in claim 12, wherein the electrically conducting polymer layer comprises poly(3,4-ethylenedioxythiophene).
- 16. The solid electrolytic capacitor element as claimed in claim 3, wherein the spacing between said metal powder-containing electrically conducting layer and the cathode side edge part of said insulating layer is from about 0.1 to about 1.5 mm.
- 17. A solid electrolytic capacitor obtainable by placing at least one capacitor element as claimed in any one of claims 1 to 16 on a lead frame and joining these.
- 18. A method for producing a solid electrolytic capacitor element, comprising a valve-acting metal substrate having on a surface a dielectric film; circumferentially providing an insulating layer on a position defining an edge part acting as an anode of the valve-acting metal substrate; and sequentially forming a solid electrolyte layer and an electrically conducting layer comprising a carbon paste layer and a metal powder-containing electrically conducting layer on an entire surface of the substrate on a side opposite said anode with respect to said insulating layer, wherein said metal powder-containing electrically conducting layer is provided within a region of the carbon paste layer, such that said metal powder-containing electrically conducting layer does not contact the insulating layer.
- 19. A method for producing a solid electrolytic capacitor element, comprising a valve-acting metal substrate having on a surface a dielectric film; circumferentially providing an insulating layer on a position defining an edge part acting as an anode of the valve-acting metal substrate; and sequentially forming a solid electrolyte layer and an electrically conducting layer comprising a carbon paste layer and a metal powder-containing electrically conducting layer on an entire surface of the substrate on a side opposite said anode with respect to said insulating layer, wherein said metal powder-containing electrically conducting layer is provided with a spacing from a cathode side edge part of said insulating layer.
Priority Claims (1)
Number |
Date |
Country |
Kind |
P2000-207172 |
Jul 2000 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] 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 No. 60/245,574 filed Nov. 6, 2000 pursuant to 35 U.S.C. §111(b).
Provisional Applications (1)
|
Number |
Date |
Country |
|
60245574 |
Nov 2000 |
US |