JPS6350841Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a chip-shaped solid electrolytic capacitor. Chip-shaped capacitors are required to have a shape suitable for mounting on printed circuit boards.
It is now leadless.

The shape and dimensions of the capacitor must be such that it can be mounted on the board using automatic machines.

Since these capacitors were small in size and difficult to assemble, they had poor dimensional accuracy and did not have a flat surface, resulting in handling errors during automatic installation. Creating a structure and shape that prevents this requires more man-hours and becomes expensive.

The present invention aims to improve these drawbacks and provide a chip-shaped solid electrolytic capacitor suitable for automatic mounting.

The present invention will be explained based on examples.

FIG. 1 is a sectional view of a capacitor according to the present invention, and FIG. 2 is a perspective view.

The cathode terminal 1 used in the present invention is a metal piece bent to have an upper piece 2, a lower piece 3, and a vertical piece 4. The upper piece 2 is longer than the lower piece 4 and has approximately the same length as the capacitor element. be.

As shown in FIG. 2, side pieces 5 are provided which are bent downward from both sides of the upper piece 1.

A capacitor element 6 is housed inside the cathode terminal 1 surrounded by each piece. The capacitor element is made by sequentially laminating an oxide film, a semiconductor layer, and a cathode layer on the surface of a valve metal anode body made of tantalum or the like by a conventional manufacturing method, and has an anode lead wire led out from one end.

The cathode layer of this capacitor element is connected to the cathode terminal 1.
Connect electrically with solder, etc.

On the anode side, an anode terminal 7 having a vertical piece and a horizontal piece is welded and connected to an anode lead wire led out from the capacitor element 6.

At this time, the horizontal piece is arranged so as to be in the same plane as the lower piece 3 of the cathode terminal 1.

A heat-resistant resin 8 is filled between the anode terminal and the cathode terminal to protect the capacitor element and the welded portion. Incidentally, if necessary, one upper surface of the cathode terminal 1 may be coated and insulated with a heat-resistant insulating paint or the like.

As the cathode terminal and the anode terminal, a metal plate that can be soldered and welded, or a metal plate coated with solderable plating, such as solder, tin, or gold plating, such as nickel, nickel silver, or copper, is used.

In the present invention, since an upper piece is provided on the cathode terminal, a flatter surface can be obtained compared to only resin filling. Therefore, suction errors such as not being suctioned or falling off during vacuum suction during manufacturing or when mounting a printed circuit board are eliminated, and the work can be performed more reliably.

Furthermore, since side pieces are provided, dimensional accuracy is good, and automatic attachment allows chucking by gripping other than vacuum suction. It also prevented the protective resin from flowing out during manufacturing, reducing shape defects.

The parts of the anode terminal and the cathode terminal connected to the substrate land are arranged in the same plane, making mounting easy and reliable.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a perspective view thereof. DESCRIPTION OF SYMBOLS 1... Cathode terminal, 2... Upper piece, 3... Lower piece, 5... Side piece, 6... Capacitor element, 7...
...Anode terminal.

Claims (1)

[Scope of utility model registration request] A metal piece that is bent to have an upper piece 2, a lower piece 3, and a vertical piece 4, the upper piece being longer than the lower piece and having approximately the same length as the capacitor element 6, and from both sides of the upper piece. a cathode terminal 1 having a side piece 5 bent downward; a capacitor element 6 housed within said cathode terminal and having a cathode layer electrically connected to its inner surface; and electrically connected to the anode of the capacitor element. a solid electrolytic capacitor consisting of an anode terminal 7 and an anode terminal 7 arranged such that the horizontal piece is in the same plane as the lower piece of the cathode terminal.