Solid electrolytic capacitor for embedding into a circuit board

摘要

An electrolytic capacitor is provided that contains a capacitor element, a case, and anode and cathode terminations having first and second external components. The first external components are perpendicular to a lower surface of the case, while the second external components are parallel to the lower surface of the case and extend outwardly away from the front and rear surfaces of the case, respectively. Further, the second external components are mounted to a circuit board such that at least a portion of the capacitor is embedded in the board and such that the second external components are parallel to and in contact with a mounting surface of the circuit board. The particular arrangement of the external components of the terminations stabilizes the capacitor when it is embedded into the board to minimize flexing against the board and cracking or delamination of the capacitor.

主权项

1. A circuit board comprising: a substrate having an upper surface and a lower surface, wherein the substrate defines a mounting surface on which opposing conductive members are located, wherein a recessed opening is provided between the conductive members; and a solid electrolytic capacitor comprising a capacitor element that includes an anode, a dielectric layer overlying the anode, and a cathode overlying the dielectric layer; a case that encapsulates the capacitor element, wherein the case includes an upper surface, a lower surface, a front surface, and a rear surface; an anode termination that is electrically connected to the anode, the anode termination containing a first external component that is generally perpendicular to the lower surface of the case and a second external component that is generally parallel to the lower surface of the case and that extends outwardly away from the front surface of the case; and a cathode termination that is electrically connected to the cathode, the cathode termination containing a first external component that is generally perpendicular to the lower surface of the case and a second external component that is generally parallel to the lower surface of the case and that extends outwardly away from the rear surface of the case; wherein the second external component of the anode termination and the second external component of the cathode termination are electrically connected to the conductive members so that at least a portion of the solid electrolytic capacitor is embedded within the recessed opening, further wherein the second external component of the anode termination and the second external component of the cathode termination are generally parallel to and in contact with the mounting surface, wherein the second external component of the anode termination and the second external component of the cathode termination are generally coplanar.