IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0575627
(2009-10-08)
|
등록번호 |
US-8194395
(2012-06-05)
|
발명자
/ 주소 |
- Zednicek, Stanislav
- Vilc, Ladislav
- Biler, Martin
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
20 인용 특허 :
68 |
초록
▼
A capacitor assembly that includes an electrolytic capacitor that contains an anode body, dielectric overlying the anode, and a solid electrolyte overlying the dielectric is provided. An anode lead is also electrically connected to the anode body and extends in a longitudinal direction therefrom. Th
A capacitor assembly that includes an electrolytic capacitor that contains an anode body, dielectric overlying the anode, and a solid electrolyte overlying the dielectric is provided. An anode lead is also electrically connected to the anode body and extends in a longitudinal direction therefrom. The anode lead is connected to an “upstanding” portion of a leadframe. Among other things, this helps to limit substantial horizontal movement of the lead and thereby improve the mechanical robustness of the part. The capacitor and leadframe are enclosed and hermetically sealed within a ceramic housing in the presence of an inert gas. It is believed that the ceramic housing is capable of limiting the amount of oxygen and moisture supplied to the conductive polymer of the capacitor. In this manner, the solid electrolyte (e.g., conductive polymer) is less likely to undergo a reaction in high temperature environments, thus increasing the thermal stability of the capacitor assembly.
대표청구항
▼
1. A capacitor assembly comprising: an electrolytic capacitor comprising an anode body, dielectric, and solid electrolyte overlying the dielectric, wherein an anode lead is electrically connected to the anode body and extends in a longitudinal direction therefrom;a leadframe containing a first porti
1. A capacitor assembly comprising: an electrolytic capacitor comprising an anode body, dielectric, and solid electrolyte overlying the dielectric, wherein an anode lead is electrically connected to the anode body and extends in a longitudinal direction therefrom;a leadframe containing a first portion that is positioned generally perpendicular to the longitudinal direction of the anode lead and connected thereto;a ceramic housing within which the electrolytic capacitor and the first portion of the leadframe are positioned and hermetically sealed, the ceramic housing defining an interior cavity having a gaseous atmosphere, the gaseous atmosphere containing an inert gas;an anode termination that is in electrical connection with the leadframe; anda cathode termination that is in electrical connection with the solid electrolyte. 2. The capacitor assembly of claim 1, wherein the anode is formed from a valve metal composition. 3. The capacitor assembly of claim 2, wherein the valve metal composition includes tantalum or niobium oxide. 4. The capacitor assembly of claim 1, wherein the solid electrolyte includes a conductive polymer. 5. The capacitor assembly of claim 4, wherein the conductive polymer is a polypyrrole, polythiophene, polyaniline, polyacetylene, poly-p-phenylene, polyphenolate, or a combination thereof. 6. The capacitor assembly of claim 4, wherein the conductive polymer is poly(3,4-ethylenedioxythiophene). 7. The capacitor assembly of claim 1, wherein the inert gas includes nitrogen, helium, argon, xenon, neon, krypton, radon, or combinations thereof. 8. The capacitor assembly of claim 1, wherein inert gases constitute from about 50 wt. % to 100 wt. % of the gaseous atmosphere. 9. The capacitor assembly of claim 1, wherein inert gases constitute from about 75 wt. % to 100 wt. % of the gaseous atmosphere. 10. The capacitor assembly of claim 1, wherein oxygen constitutes less than about 1 wt. % of the gaseous atmosphere. 11. The capacitor assembly of claim 1, wherein the leadframe further comprises a second portion that is generally parallel to the longitudinal direction in which the anode lead extends. 12. The capacitor assembly of claim 11, wherein a conductive adhesive electrically connects the second portion of the leadframe to the anode termination. 13. The capacitor assembly of claim 11, wherein the second portion is positioned within the ceramic housing. 14. The capacitor assembly of claim 1, wherein a conductive adhesive electrically connects the solid electrolyte to the cathode termination. 15. The capacitor assembly of claim 1, wherein a first region of the anode termination is positioned within the ceramic housing and a second region of the anode termination is positioned external to the ceramic housing. 16. The capacitor assembly of claim 1, wherein a first region of the cathode termination is positioned within the ceramic housing and a second region of the cathode termination is positioned external to the ceramic housing. 17. The capacitor assembly of claim 1, wherein the first portion of the leadframe is connected to the anode lead by a weld. 18. The capacitor assembly of claim 1, wherein the first portion of the leadframe contains a U-shaped mounting region that receives the anode lead. 19. The capacitor assembly of claim 1, further comprising a lid that is welded or soldered to the ceramic housing. 20. A method of forming a capacitor assembly, the method comprising: providing an electrolytic capacitor comprising an anode body, dielectric overlying the anode body, and solid electrolyte overlying the dielectric, wherein an anode lead is electrically connected to the anode body and extends in a longitudinal direction therefrom;connecting the anode lead to a first portion of a leadframe, wherein the first portion of the leadframe is positioned generally perpendicular to the longitudinal direction in which the anode lead extends;positioning the electrolytic capacitor and the first portion of the leadframe within a ceramic housing;electrically connecting the solid electrolyte of the capacitor to a cathode termination;electrically connecting the leadframe to an anode termination;positioning a lid over the ceramic housing; andhermetically sealing the lid to the ceramic housing in the presence of a gaseous atmosphere containing an inert gas. 21. A capacitor assembly comprising: an electrolytic capacitor comprising an anode body that includes tantalum or niobium oxide, dielectric, and solid electrolyte overlying the dielectric, the solid electrolyte including a polypyrrole, polythiophene, polyaniline, polyacetylene, poly-p-phenylene, polyphenolate, or a combination thereof, wherein an anode lead is electrically connected to the anode body and extends in a longitudinal direction therefrom;a leadframe containing a first portion that is positioned generally perpendicular to the longitudinal direction of the anode lead and connected thereto;a housing within which the electrolytic capacitor and the first portion of the leadframe are positioned and hermetically sealed, the housing defining an interior cavity having a gaseous atmosphere, the gaseous atmosphere containing an inert gas;an anode termination that is in electrical connection with the leadframe; anda cathode termination that is in electrical connection with the solid electrolyte. 22. The capacitor assembly of claim 21, wherein the conductive polymer is poly(3,4-ethylenedioxythiophene). 23. The capacitor assembly of claim 22, wherein inert gases constitute from about 75 wt. % to 100 wt. % of the gaseous atmosphere. 24. The capacitor assembly of claim 22, wherein the leadframe further comprises a second portion that is generally parallel to the longitudinal direction in which the anode lead extends. 25. The capacitor assembly of claim 24, wherein the second portion is positioned within the housing. 26. The capacitor assembly of claim 22, wherein a first region of the anode termination is positioned within the housing and a second region of the anode termination is positioned external to the housing. 27. The capacitor assembly of claim 22, wherein a first region of the cathode termination is positioned within the housing and a second region of the cathode termination is positioned external to the housing. 28. The capacitor assembly of claim 22, further comprising a lid that is welded or soldered to the housing.
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