A capacitor for powering an implantable medical device is described. The capacitor includes a casing having contoured surfaces to more closely conform to body contours. This means that the anode housed in the casing must also have a contoured shape substantially matching that of the casing. Accordingly, the anode is comprised of a pressed pellet having a surrounding peripheral edge extending to spaced-apart first and second major face walls. An anode lead wire comprises an embedded portion extending into the anode pellet. First and second channel-shaped recesses aligned with each other extend into the anode pellet from the first and second major face walls to intersect with the embedded lead wire portion. The first and second channel-shaped recesses also extend to opposed locations at the surrounding peripheral edge of the anode pellet. The anode pellet is bent at the aligned first and second channel-shaped recesses to provide a right anode pellet portion electrically connected to a left anode pellet portion by the embedded lead wire portion. The thusly contoured anode pellet has an anatomical shape that matches that of the contoured casing to provide an implantable capacitor that is volumetrically efficient.

A capacitor for powering an implantable medical device is described. The capacitor includes a casing having contoured surfaces to more closely conform to body contours. This means that the anode housed in the casing must also have a contoured shape substantially matching that of the casing. Accordingly, the anode is comprised of a pressed pellet having a surrounding peripheral edge extending to spaced-apart first and second major face walls. An anode lead wire comprises an embedded portion extending into the anode pellet. First and second channel-shaped recesses aligned with each other extend into the anode pellet from the first and second major face walls to intersect with the embedded lead wire portion. The first and second channel-shaped recesses also extend to opposed locations at the surrounding peripheral edge of the anode pellet. The anode pellet is bent at the aligned first and second channel-shaped recesses to provide a right anode pellet portion electrically connected to a left anode pellet portion by the embedded lead wire portion. The thusly contoured anode pellet has an anatomical shape that matches that of the contoured casing to provide an implantable capacitor that is volumetrically efficient.

A welding structure of metal members includes a first member having a first opposing surface, a second member having a second opposing surface, and a welding portion fixing the first member and the second member to each other. A gap is formed between the first opposing surface and the second opposing surface. R1>R2 is satisfied where R1 represents a width of the welding portion in the gap and R2 represents a width of the welding portion on the first opposing surface of the first member. T2>T1 is satisfied where T2 represents a thickness of the second member in the portion where the welding portion is formed and T1 represents a thickness of the first member in the portion where the welding portion is formed. 0.8≤D1/T1≤1.2 is satisfied where D1 represents a depth of the welding portion in the second member from the second opposing surface.

A welding structure of metal members includes a first member having a first opposing surface, a second member having a second opposing surface, and a welding portion fixing the first member and the second member to each other. A gap is formed between the first opposing surface and the second opposing surface. R1>R2 is satisfied where R1 represents a width of the welding portion in the gap and R2 represents a width of the welding portion on the first opposing surface of the first member. T2>T1 is satisfied where T2 represents a thickness of the second member in the portion where the welding portion is formed and T1 represents a thickness of the first member in the portion where the welding portion is formed. 0.8≤D1/T1≤1.2 is satisfied where D1 represents a depth of the welding portion in the second member from the second opposing surface.

A capacitor module configured to be horizontally mounted on a PCB and including; a case including a first side surface, an opposing second side, a first electrode pad and a second electrode pad disposed at the first side surface, and a third electrode pad disposed at the second side surface, and an electrolytic capacitor including a dielectric extending in a first horizontal direction, a first electrode contacting the first electrode pad and a second electrode contacting the second electrode pad, wherein the first electrode pad is spaced apart from second electrode pad in a second horizontal direction.

Disclosed is an electrolytic capacitor including: a capacitor element including a pair of electrodes; an electrolyte interposed between the pair of electrodes; a pair of leads electrically connected to the pair of electrodes, respectively; a case in which the capacitor element and the electrolyte are accommodated, and that has an opening; a sealing member that seals the opening, and has a pair of insertion holes for leading out the leads; an insulating plate having a pair of through holes for leading out the leads; and a resin member filled between the sealing member and the insulating plate, wherein the insulating plate has a resin bonding surface that abuts against the resin member, and a mounting surface opposed to the resin bonding surface, and includes at least one protrusion or recess on the resin bonding surface.

Disclosed is an electrolytic capacitor including: a capacitor element including a pair of electrodes; an electrolyte interposed between the pair of electrodes; a pair of leads electrically connected to the pair of electrodes, respectively; a case in which the capacitor element and the electrolyte are accommodated, and that has an opening; a sealing member that seals the opening, and has a pair of insertion holes for leading out the leads; an insulating plate having a pair of through holes for leading out the leads; and a resin member filled between the sealing member and the insulating plate, wherein the insulating plate has a resin bonding surface that abuts against the resin member, and a mounting surface opposed to the resin bonding surface, and includes at least one protrusion or recess on the resin bonding surface.

An electrolytic capacitor includes an electrode foil and a lead member connected to the electrode foil. The electrode foil has a first principal surface and a second principal surface opposite to the first principal surface. The electrode foil and the lead member are connected by a caulking part in an overlapping part in which the first principal surface of the electrode foil and the lead member overlap each other. The caulking part has a through-hole penetrating the electrode foil and the lead member. The electrode foil in the caulking part includes a first folded part that is folded back at a peripheral edge portion of the through-hole to be disposed on the second principal surface. The lead member in the caulking part includes (i) a penetrating part that penetrates the electrode foil and (ii) a second folded part that is folded back at an end portion of the penetrating part to be disposed on the second principal surface. The penetrating part includes an inner wall of the through-hole. The second folded part covers the first folded part.

A tantalum capacitor includes: a tantalum body including tantalum powder and having a tantalum wire exposed to one end surface; a molded portion having fifth and sixth surfaces opposing each other in a first direction, third and fourth surfaces opposing each other in a second direction, and first and second direction opposing each other in a third direction, and disposed to surround the tantalum body; an anode lead frame exposed to the second surface of the molded portion and electrically connected to the tantalum wire; and a cathode lead frame spaced apart from the anode lead frame and exposed to the second surface of the molded portion. The anode lead frame includes a first connection portion and a first bent portion, and the first bent portion forms an angle of inclination, ranging from 70° or more to 80° or less, to a side of the tantalum body with respect to the first connection portion.

A tantalum capacitor includes: a tantalum body including tantalum powder and having a tantalum wire exposed to one end surface; a molded portion having fifth and sixth surfaces opposing each other in a first direction, third and fourth surfaces opposing each other in a second direction, and first and second direction opposing each other in a third direction, and disposed to surround the tantalum body; an anode lead frame exposed to the second surface of the molded portion and electrically connected to the tantalum wire; and a cathode lead frame spaced apart from the anode lead frame and exposed to the second surface of the molded portion. The anode lead frame includes a first connection portion and a first bent portion, and the first bent portion forms an angle of inclination, ranging from 70° or more to 80° or less, to a side of the tantalum body with respect to the first connection portion.