SURFACE MOUNT CAPACITOR AND METHOD OF MAKING SAME
First Claim
1. A surface mount capacitor comprising;
- a) a capacitive element including an anode and a cathode;
b) an encapsulation material forming a case around the capacitive element except for an exposed portion of the anode;
c) an electrically conductive planar substrate comprising anode and/or cathode terminations having surface mounting portions on a single exterior side of the case and to which the capacitive element is mounted;
d) a conductive path between the exposed portion of the anode and the anode termination comprising an external conductive connection on an external surface of the case.
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0 Petitions
Accused Products
Abstract
A surface mount capacitor (10) and method for making the same. A solid slug or pellet anode body (1) is encapsulated in a case (6) of insulating material. An anode and cathode termination pair (2, 3) are formed with surface mount mounting portions on one side of the case (6). An electrical connection (4) is made from the cathode termination (2) to a cathode on pellet (1) through the case (6). An electrical connection (7) is made between an anode associated with the pellet (1) and the anode termination (3) externally of the case (6). The external connection (7) allows improved volumetric efficiency by freeing up space in the case (6) for a bigger pellet (1). The method includes mass producing these capacitors (10) by mounting a plurality of pellets (1) on a lead frame (11) with pre-formed anode/cathode termination pairs (2, 3), at least substantially encapsulating the plurality of mounted pellets (1) and each pellet'"'"'s associated anode and cathode, singulating the encapsulated pellets (1) to expose a portion of the pellet anode, and applying the electrical external conductive path (7) between pellet anode and anode termination (3).
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Citations
57 Claims
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1. A surface mount capacitor comprising;
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a) a capacitive element including an anode and a cathode;
b) an encapsulation material forming a case around the capacitive element except for an exposed portion of the anode;
c) an electrically conductive planar substrate comprising anode and/or cathode terminations having surface mounting portions on a single exterior side of the case and to which the capacitive element is mounted;
d) a conductive path between the exposed portion of the anode and the anode termination comprising an external conductive connection on an external surface of the case. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 53, 54)
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22. An electrical circuit board comprising:
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a) an electrical circuit board;
b) an electrical circuit on the circuit board including at least one surface mount capacitor;
c) the surface mount capacitor comprising a case of encapsulating material, a capacitive element inside the case including an anode and a cathode, a portion of the anode being |exposed, an electrically conductive planar substrate comprising anode and cathode external terminations having surface mount portions outside and on one side of the case and to which the capacitive element is mounted, an external conductive connection outside the case in operative electrical communication with the capacitive element and the exposed portion of the anode termination, and an at least partially internal conductive path between the cathode termination and the capacitive element. - View Dependent Claims (23, 24, 25, 26, 27)
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28. An electrical or electronic device comprising:
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a) a housing and a user interface;
b) an electrical circuit board in the housing including at least one surface mount capacitor;
c) the surface mount capacitor comprising a case of encapsulating material, a capacitive element inside the case including an anode and a cathode, a portion of the anode being |exposed, an electrically conductive planar substrate comprising anode and cathode external terminations having surface mount portions outside and on one side of the case and to which the capacitive element is mounted, an at least partially external conductive connection outside the case in operative electrical communication with the capacitive element and the exposed portion of the anode termination, and an at least partially internal conductive path between the cathode termination and the capacitative element. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36)
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37-52. -52. (canceled)
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55. A surface mount capacitor comprising:
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a) a capacitive element including an anode and a cathode;
b) an encapsulation material forming a case around the capacitive element except for an exposed portion of the anode;
c) an electrically conductive planar substrate comprising anode and/or cathode terminations having surface mounting portions on a single exterior side of the case and to which the capacitive element is mounted;
d) a conductive path between the exposed portion of the anode and the anode termination comprising an external conductive connection on an external surface of the case wherein the anode termination is isolated from the capacitive element, other than by the external conduction connection, by plastic material. - View Dependent Claims (56, 57)
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Specification