JPS5843235Y2 - DHD type diode - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an improved DHD type glass-sealed diode that facilitates mounting on a DHD type diode, particularly a printed circuit board.

Most of the diodes currently on the market are DH
It is a D-type glass-sealed diode, and has lead wires for taking out the electrodes at both ends of the sealed element.

By the way, in order to use these diodes, for example, the lead wires are inserted into a printed circuit board or the like, and soldering or the like is performed to secure the diodes.

However, mounting this diode on a printed circuit board is done by inserting a long and thin lead wire into a small insertion hole on the printed circuit board, which requires a large amount of man-hours. It is necessary to pre-shape the wire.

On the other hand, in the manufacturing process of the diode itself, the presence of lead wires complicates the handling of each manufacturing process, creating a major obstacle in installing an entire automated line.

For example, in the sealing process, it is difficult to attach the lead wire to the sealing jig because the lead wire is long and thin and easily bent.

Furthermore, since the lead wires are bent during the plating work, it is necessary to stretch the lead wires, so improvements in the work have been desired.

The present invention was proposed in view of the above drawbacks, and is a DH suitable for mounting on a printed circuit board when using a diode.
D-type glass-sealed diodes are provided.

According to this invention, a flange-equipped conductor is first prepared, and then the conductor is converted into a diode so that it can be easily mounted on a printed circuit board.

Embodiments according to this invention will be described in detail below with reference to the drawings, while comparing them with conventional examples.

FIG. 1 is a cross-sectional view of a conventional DHD type glass-sealed diode, in which a diode element 2 comprising a bump electrode with raised silver ridges and a lower electrode coated with silver is sandwiched between the two electrodes. The lead conductor 3 is sandwiched between the lead conductors 3, and the lead conductor 3 is sandwiched between the lead conductors 3 and the glass tube 4 covering the surroundings of the lead conductors 3.
is sealed on the side.

A pair of lead wires 5 made of a copper-coated iron-nickel core wire are welded to the outside of the sunrise conductor 3.

By the way, in order to mount these diodes 1 on a printed circuit board, for example, as shown in FIG. This is done by inserting the diode 1 into the insertion hole of the printed circuit board and soldering it, but since it is necessary to elastically insert the lead wire into the insertion hole and hold it on the printed circuit board for several minutes, it is necessary to connect the diode to the printed circuit board. It is difficult to install and requires a large amount of man-hours.

FIG. 3 is a partial cross-sectional view of an improved DHD glass diode 6 according to an embodiment of the present invention.

In the figure, 2 is the aforementioned P-N junction planar diode element, which has a bump electrode with raised silver ridges on one end and a silver-coated electrode on the other end, and a pair of eyes made of Dumet material at both ends. It is sandwiched between conductors 7.

The rising conductor 7 is composed of an inner small diameter part 8 and an outer large diameter part 9, and the above-mentioned glass tube 4 surrounds the diode element 2. It is fused and sealed.

The outer large diameter portion 9 of the sunrise conductor 7 is larger than the cross section of the glass diode body, that is, the outer diameter of the glass tube 4.

Therefore, in order to mount these diodes 6 on the printed circuit board 10, for example, as shown in FIG. be exposed.

That is, there is no need to insert the lead wire into the pore as in the conventional case, and the mounting of the diode 6 on the printed circuit board 10 is extremely easy because it can be carried out simply by placing the lead wire.

The shape of the large diameter portion may be freely changed to a square, a triangle, etc. as long as the size is substantially larger than the outer shape of the glass and the diode body can be held between the large diameter portions.

Also, in the examples, the large diameter part is shown to be in contact with the glass tube, but this is not necessary and the length of the small diameter part can be made longer than the length of the fusion bond with the glass. be.

The structure of the present invention as described above makes it extremely easy to attach the glass diode to the printed circuit board, which saves labor.In addition, since there are no thin and long lead wires in the diode manufacturing process, it is easy to handle. It becomes easier and work improvements can be implemented.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a conventional DHD type glass-sealed diode, FIG. 2 is a perspective view of the lead wire shown in FIG. The cross-sectional view of the stop diode in Figure 4 is taken from IV-IV in Figure 3.
FIG. 5 shows a longitudinal sectional view of the device mounted on the printed circuit board of FIG. 3. 2... Semiconductor element (diode element), 4...
... Glass tube, 6 ... Semiconductor device (glass sealed diode), 7 ... Exit conductor, 8 ...
...Small diameter part, 9...Large diameter part.

Claims (1)

[Scope of utility model registration request] It consists of a semiconductor element having electrodes on both sides, a Hiji conductor having a small diameter part and a large diameter part, and a glass tube, and both electrodes of the semiconductor element are sandwiched between the end faces of the small diameter part of the Hiji conductor, and the glass tube A DHD type diode, characterized in that a semiconductor element is surrounded and sealed with a side surface of a small diameter portion of the exposed conductor, and the large diameter portion of the exposed conductor is made larger than the tube diameter of the glass.