Carrier wire for solid electrolytic capacitors
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01G-009/15
H01G-009/012
H01G-009/052
출원번호
US-0574432
(2014-12-18)
등록번호
US-9837216
(2017-12-05)
발명자
/ 주소
Djebara, Lotfi
Matousek, Radek
Kubes, Ludek
출원인 / 주소
AVX Corporation
대리인 / 주소
Dorirty & Manning, P.A.
인용정보
피인용 횟수 :
0인용 특허 :
53
초록▼
A solid electrolytic capacitor including a capacitor element and an anode lead assembly is provided. The capacitor element includes a sintered, porous anode body; a dielectric layer overlying the sintered, porous anode body; and a cathode overlying the dielectric layer that includes a solid electrol
A solid electrolytic capacitor including a capacitor element and an anode lead assembly is provided. The capacitor element includes a sintered, porous anode body; a dielectric layer overlying the sintered, porous anode body; and a cathode overlying the dielectric layer that includes a solid electrolyte. The anode lead assembly includes a first anode lead having an embedded portion positioned within the anode body and an external portion extending from a surface of the anode body in a longitudinal direction. The external portion includes a substantially planar surface. Meanwhile, the second anode lead is positioned external to the anode body and includes a first portion and a second portion. The first portion has a substantially planar surface that is connected to the substantially planar surface of the external portion of the first anode lead.
대표청구항▼
1. A solid electrolytic capacitor, the solid electrolytic capacitor comprising: a capacitor element, wherein the capacitor element comprises a sintered, porous anode body; a dielectric layer overlying the sintered, porous anode body; and a cathode overlying the dielectric layer that includes a solid
1. A solid electrolytic capacitor, the solid electrolytic capacitor comprising: a capacitor element, wherein the capacitor element comprises a sintered, porous anode body; a dielectric layer overlying the sintered, porous anode body; and a cathode overlying the dielectric layer that includes a solid electrolyte; andan anode lead assembly, wherein the anode lead assembly comprises a first anode lead having an embedded portion positioned within the sintered, porous anode body and an external portion extending from a surface of the sintered, porous anode body in a longitudinal direction, wherein the external portion of the first anode lead includes a first external portion and a second external portion, wherein the second external portion includes a substantially planar surface, wherein the second external portion has a width that is greater than a width of the first external portion; and a second anode lead positioned external to the sintered, porous anode body, wherein the second anode lead comprises a first portion and a second portion, wherein the first portion has a substantially planar surface, wherein the substantially planar surface of the first portion of the second anode lead is connected to the substantially planar surface of the second external portion of the first anode lead;wherein the second portion of the second anode lead has a height that is smaller than a height of the embedded portion of the first anode lead, wherein the height of the second portion of the second anode lead is from about 10% to about 90% of the height of the embedded portion of the first anode lead. 2. The solid electrolytic capacitor of claim 1, wherein the first anode lead and the second anode lead include different materials. 3. The solid electrolytic capacitor of claim 1, wherein the first anode lead is tantalum and the second anode lead is a non-tantalum material. 4. The solid electrolytic capacitor of claim 1, wherein the second external portion of the first anode lead has a height that is smaller than a corresponding height of the first external portion of the first anode lead. 5. The solid electrolytic capacitor of claim 1, wherein the first portion of the second anode lead has a width that is greater than a width of the second portion of the second anode lead. 6. The solid electrolytic capacitor of claim 1, wherein the first portion of the second anode lead has a height that is smaller than a corresponding height of the second portion of the second anode lead. 7. The solid electrolytic capacitor of claim 1, wherein the substantially planar surface of the first portion of the second anode lead is connected to the substantially planar surface of the second external portion of the first anode lead by resistance welding. 8. The solid electrolytic capacitor of claim 1, further comprising an anode termination, wherein the second portion of the second anode lead is connected to the anode termination by laser welding. 9. The solid electrolytic capacitor of claim 1, further comprising a cathode termination that is electrically connected to the cathode. 10. The solid electrolytic capacitor of claim 1, wherein the anode body is formed from a powder having a specific charge of from about 10,000 μF*V/g to about 600,000 μF*V/g, wherein the powder comprises tantalum, niobium, aluminum, hafnium, titanium, an electrically conductive oxide thereof, or an electrically conductive nitride thereof. 11. The solid electrolytic capacitor of claim 1, further comprising a second capacitor element and a second anode lead assembly, wherein the second capacitor element comprises a sintered, porous anode body; a dielectric layer overlying the sintered, porous anode body; and a cathode overlying the second dielectric layer that includes a solid electrolyte; and wherein the second anode lead assembly comprises a third anode lead having an embedded portion positioned within the sintered, porous anode body and an external portion extending from a surface of the sintered, porous anode body in a longitudinal direction, wherein the external portion includes a substantially planar surface; and a fourth anode lead positioned external to the sintered, porous anode body, wherein the fourth anode lead comprises a first portion and a second portion, wherein the first portion has a substantially planar surface, wherein the substantially planar surface of the first portion of the fourth anode lead is connected to the substantially planar surface of the external portion of the third anode lead. 12. A method for forming a solid electrolytic capacitor, the method comprising: positioning a first anode lead within a powder formed from a valve metal composition such that the first anode lead includes an embedded portion located within a porous anode body and an external portion extending from a surface of the porous anode body in a longitudinal direction, wherein the external portion of the first anode lead includes a first external portion and a second external portion, wherein the second external portion includes a substantially planar surface, wherein the second external portion includes a substantially planar surface, wherein the second external portion has a width that is greater than a width of the first external portion;compacting the powder around the embedded portion of the first anode lead;sintering the compacted powder to form a sintered, porous anode body;positioning a second anode lead external to the sintered, porous anode body, wherein the second anode lead comprises a first portion and a second portion, wherein the first portion includes a substantially planar surface;wherein the second portion of the second anode lead has a height that is smaller than a height of the embedded portion of the first anode lead, wherein the height of the second portion of the second anode lead is from about 10% to about 90% of the height of the embedded portion of the first anode lead;connecting the substantially planar surface of the first portion of the second anode lead to the substantially planar surface of the second external portion of the first anode lead; andconnecting the second portion of the second anode lead to an anode termination to form an electrical connection between the second portion of the second anode lead and the anode termination. 13. The method of claim 12, further comprising trimming excess anode lead material from the second anode lead after welding the second portion of the second anode lead to the anode termination. 14. The method of claim 12, wherein the substantially planar surface of the second external portion of the first anode lead is formed by flattening or crimping the first anode lead. 15. The method of claim 12, wherein the second portion of the second anode lead has a height that is smaller than a height of the embedded portion of the first anode lead. 16. The method of claim 12, wherein the first portion of the second anode lead is connected to the second external portion of the first anode lead by resistance welding. 17. The method of claim 12, wherein the second portion of the second anode lead is connected to the anode termination by laser welding. 18. The method of claim 12, wherein the substantially planar surfaces are formed by flattening, crimping, or compression. 19. The method of claim 12, further comprising: anodically oxidizing the sintered, porous anode body to form a dielectric layer; andapplying a solid electrolyte to the anodically oxidized sintered, porous anode body to form a cathode. 20. The method of claim 19, further comprising: forming an electrical connection between the cathode and a cathode termination; andencapsulating the capacitor with a molding material such that at least a part of the anode termination and a part of the cathode termination remain exposed. 21. The method of claim 12, the method further comprising: positioning a third anode lead within a powder formed from a valve metal composition such that the third anode lead includes an embedded portion located within a second porous anode body and an external portion extending from a surface of the second porous anode body in a longitudinal direction, wherein the external portion includes a substantially planar surface;compacting the powder around the embedded portion of the third anode lead;sintering the compacted powder to form a second sintered, porous anode body;positioning a fourth anode lead external to the second sintered, porous anode body, wherein the fourth anode lead comprises a first portion and a second portion, wherein the first portion includes a substantially planar surface;connecting the substantially planar surface of the first portion of the fourth anode lead to the substantially planar surface of the external portion of the third anode lead; andconnecting the second portion of the fourth anode lead to the anode termination to form an electrical connection between the second portion of the fourth anode lead and the anode termination.
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