Solid Electrolytic Capacitor with Integrated Fuse Assembly
First Claim
1. A solid tantalum capacitor comprising:
- a capacitor body having a tantalum wire lead and a recess;
a fuse assembly that includes a fuse with two terminations and an adhesive material for securing the fuse in the recess;
a connection assembly that includes an electrically conductive material that connects the fuse terminations to the capacitor body;
a plating that coats the terminations and conductive material; and
a conformal coating that encases at least the capacitor body.
2 Assignments
0 Petitions
Accused Products
Abstract
A solid electrolytic capacitor with an integrated fuse assembly is provided. The fuse can be secured in a recess formed in a face of the porous anode body of the capacitor. When the fuse is secured in the recess, the fuse can be substantially flush with the face of the porous anode body in which the recess is formed. Further, the equivalent series resistance (ESR) of the fuse is reduced because the length of the connection between the fuse and the porous anode body is reduced. Further, because the fuse is integrated into the porous anode body, the capacitor can be assembled onto a circuit board via standard pick and place equipment.
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Citations
25 Claims
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1. A solid tantalum capacitor comprising:
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a capacitor body having a tantalum wire lead and a recess; a fuse assembly that includes a fuse with two terminations and an adhesive material for securing the fuse in the recess; a connection assembly that includes an electrically conductive material that connects the fuse terminations to the capacitor body; a plating that coats the terminations and conductive material; and a conformal coating that encases at least the capacitor body. - View Dependent Claims (2, 3, 4, 5, 6, 19, 20, 21, 22, 25)
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7. A solid electrolytic capacitor comprising:
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a capacitor body that comprises a sintered, porous anode body, a dielectric layer overlying at least a portion of the porous anode body, and a cathode overlying at least a portion of the dielectric layer, the cathode including a solid electrolyte, wherein a recess is formed in a face of the capacitor body; an anode lead; and a fuse, wherein the fuse is secured in the recess. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for forming a solid electrolytic capacitor having an integrated fuse, the method comprising:
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embedding an anode lead within a powder formed from a valve metal composition; compacting the powder around the anode lead to form a pellet, wherein a portion of the anode lead extends from a surface of the pellet and a recess is formed in a face of the pellet; sintering the pellet to form a porous anode body; anodically oxidizing the sintered anode body to form a dielectric layer; applying a solid electrolyte to the anodically oxidized sintered anode body to form a capacitor body; securing a fuse in the recess, wherein the fuse is substantially flush with the face in which the recess is formed; electrically connecting the fuse to the capacitor body using an electrically conductive material; applying a plating over the solid electrolyte and fuse; and applying a conformal coating over the plating.
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23-24. -24. (canceled)
Specification