JPS6020953Y2 - Glass sealed DHD diode - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a leadless type diode, particularly a glass-sealed D)[) diode which is convenient for wiring bodies of chip electronic components.

Most diode products are glass-sealed DHD diodes, which are equipped with lead wires for leading out the electrodes.

However, such lead wires require an excessive amount of effort in handling during the diode manufacturing process, and also have a large influence on cost components due to materials and processing aspects.

In addition, when incorporating diode products into printed circuit boards, it is necessary to form the bottom of the lead wires to match the printed board through-holes, which poses problems such as complicating automatic insertion into the printed board. It had been.

For example, in the manufacturing process of an axial lead type DHD diode, in the sealing process, it is difficult to insert the lead wire into the sealing jig because the lead wire is long and easily bent.

In addition, lead wires must be handled with care during these steps, as bending of the lead edges can cause operational problems during the subsequent lead wire solder plating process, inspection, sorting process, and mark stamping process. As a result, the improvement of work efficiency is hindered.

Therefore, the present invention has been proposed in view of the above, and an object of the present invention is to provide an improved leadless type glass-sealed DHD diode.

According to the present invention, a pair of solar conductors that seal a diode pellet in a glass tube are structurally specified and utilized as external extraction electrodes.

That is, a DHD diode is disclosed in which the sunrise conductor is constituted by an inner conductor portion having an inner diameter substantially equal to the inner diameter of the glass tube and an outer conductor portion having an axial projection and having a larger outer diameter than the glass tube.

In particular, it is proposed that the outer conductor portion has a rectangular shape and the axial protrusion is circular, and an advantageous structure is disclosed for the wiring body.

For example, as a chip component that is a leadless component, it is possible to solder wiring in the same way as resistors and capacitors, and it can also be easily used as a sieve for facsimile printed boards that use diode products placed between two printed boards. do.

Hereinafter, embodiments according to the present invention will be described in detail while comparing them with conventional ones.

FIG. 1 is a sectional view of a conventional glass-sealed DHD diode.

The DHD diode 1 consists of a diode pellet 2 having a silver bump electrode and a back electrode, which is clamped by a pair of dumet conductors 3 from both electrode sides, and the periphery of these is sealed with a cylindrical glass tube 4. be done.

A lead wire 5 made of copper-coated iron-nickel core wire is welded to the outside of each outlet conductor 3.

However, in such a conventional DHD diode 1, due to the presence of the lead wires 5, a large amount of man-hours are required to process the lead wires in the diode manufacturing process as well as in the printed wiring process using the diode product.

2 to 4 show an improved leadless type DHD diode 10 according to an embodiment of the present invention.

In the figure, a glass-sealed DHD diode 10 according to the present invention includes a diode pellet 12 in a cylindrical glass tube 11.
It is constructed by clamping and sealing between a pair of opening bodies 13 and 14.

Each outlet conductor 13 , 14 has an inner conductor portion 15 , 16 having a circular cross section that substantially matches the inner diameter of the glass tube 11 , and an axial protrusion 17 , 18 , and is larger than the outer diameter of the glass tube 11 and has a rectangular shape. It is constructed with an outer conductor portion 19.20 of the conductor.

Therefore, these outer conductor portions 19 and 20 are respectively used as external lead-out phase poles and as connection portions of wiring bodies.

FIG. 5 is a partial cross-sectional view of a wiring body for wiring the DHD diode 10 shown in FIG. 4 to a printed circuit board 21.

Here, the outer conductor portion 19.2 of the DHD diode 10
0 indicates conductive lands 22, 2 at predetermined positions on the printed circuit board 21.
3 and fixed by solder 24, and wired in the same manner as well-known chip-type electronic components.

Particularly, when the outer conductor portions 19 and 20 are formed in a rectangular shape, the diode is more stable when attached, and temporary fixing with an adhesive or the like is facilitated.

FIG. 6 shows a wiring structure in which the diode 10 of FIG. 4 is incorporated in a state different from that of FIG.

In this wiring body, the diode 10 according to the present invention is inserted between a pair of printed circuit boards 31.32 by inserting the axial protrusion 17.18 of the external lead-out portion 19.20 into the through hole of the printed circuit board 31.32. The wiring is fixed with solder 34.

In this case, other diodes and electronic components are incorporated between the printed circuit boards 31 and 32 to effectively utilize the space factor.

As shown in the above-mentioned embodiments, the DHD diode 10 of the present invention eliminates lead wires -- it is a dress type, which eliminates handling problems associated with lead wires, and reduces costs by reducing processing costs and material costs for lead wires. Measure reduction.

Further, the addition of axial protrusions 17 and 18 extending in the axial direction is useful for conveying the diode on a conveyor during fabrication and for positioning when mounting the wiring body, for practical convenience.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional DHD diode, FIG. 2 is a sectional view of a glass-sealed DHD diode according to the present invention, FIG. 3 is a sectional view taken along the line ■-■ in FIG. The figure is the second
5 is a partial cross-sectional view of the DHD diode shown in FIG. 4 used in a printed wiring body, and FIG. 6 is a partial cross-sectional view showing another specific example of FIG. 5. 10...-D) [) Diode, 11...
・Cylindrical glass tube, 12... Diode pellet, 13, 14... Exit conductor, 15.16...
...inner conductor part, 17.18 axial projection,
19.20...Outer conductor part.

Claims (1)

[Claims for Utility Model Registration] 1 A diode pellet sandwiched between a pair of sunrise conductors is sealed in a cylindrical glass tube, wherein the sunrise conductor is sealed to the glass tube and the glass tube and an outer conductor portion having an axial projection and having a diameter larger than the outer diameter of the glass tube. DHD diode. 2. The glass seal according to claim 1, wherein the outer conductor portion of the exposed conductor is formed of a rectangular conductor having an axial protrusion with a circular cross section, and is formed integrally with the inner conductor portion with a circular cross section. Stop type DHD diode.