JP3322288B2 - Electronic component and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component and a method of manufacturing the same, and more particularly, to an electronic component such as an aluminum electrolytic capacitor chip-mounted on a circuit board and a method of manufacturing the same. is there.

[0002]

2. Description of the Related Art FIG. 2 shows an example in which an aluminum electrolytic capacitor having the same direction of lead wires is formed into a chip so that it can be surface-mounted on a printed circuit board. That is, the aluminum electrolytic capacitor 20 includes a bottomed cylindrical outer case 21 in which component elements are incorporated, and the outer case 21
A pair of lead terminals 23 pulled out of the sealing portion 22
And a strip-shaped seat plate 24 attached to the end face of the exterior case 21 on the side of the sealing portion 22, and each of the strip-shaped lead terminals 2
3 penetrates the seat plate 24 and is bent along the bottom surface of the seat plate 24 in a direction away from each other, so that it can be surface-mounted on a printed circuit board. Exterior case 2
Reference numeral 1 denotes a predetermined item such as a manufacturing lot number of the aluminum electrolytic capacitor 20, a rated voltage display, a polarity display, etc., is printed on the top 21A.

[0003]

In such an aluminum electrolytic capacitor 20, in order to maintain the positional accuracy of the external terminals with respect to the seat plate and to prevent a failure in mounting on the board, the outer case 21 is attached to the seat plate 24. There is a demand for secure and secure fixing in the correct position. For this reason, the present applicant discloses in Japanese Utility Model Laid-Open Publication No. 3-99427 that a ring-shaped double-sided adhesive tape 25 is interposed between the exterior case 21 and the seat plate 24 or that the exterior case 21 and the seat plate 24 An aluminum electrolytic capacitor with an adhesive applied between them was proposed.

However, in the aluminum electrolytic capacitor using the double-sided adhesive tape 25, there is a problem that the number of parts increases and the manufacturing cost increases. Further, since the double-sided adhesive tape 25 is supplied in a state where release papers are attached to both surfaces thereof, it is necessary to peel off these release papers when applying between the outer case 21 and the seat plate 24. There was annoyance.

On the other hand, in an aluminum electrolytic capacitor using an adhesive, when the amount of the applied adhesive is large, the adhesive flows out to the bottom surface of the seat plate and hardens, so that the flatness of the bottom surface of the seat plate is lost. Such an aluminum electrolytic capacitor is to be surface-mounted on a printed circuit board in a state where each lead terminal is raised, and there is a possibility that a connection failure may occur.

As such an adhesive, a room-temperature-curable adhesive or a heat-curable adhesive, which generally requires a long time to cure, is used, so that it takes a long time to manufacture an aluminum electrolytic capacitor. there were.
The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide an electronic component capable of reducing the manufacturing cost and obtaining a reliable electrical connection, and a method of manufacturing the same. It is in.

[0007]

In order to achieve the above object, an electronic component according to a first aspect of the present invention includes a bottomed cylindrical outer case having a component element built therein, and a sealing of the outer case. A pair of lead terminals pulled out from the portion, and a plate-shaped seat plate attached to an end surface of the outer case on the sealing portion side, wherein each of the lead terminals penetrates the seat plate and the seat plate In the electronic component bent in a direction away from each other along the bottom surface of the electronic device, the outer peripheral surface on the sealing portion side of the outer case and the seat plate are fixed by an ultraviolet curable adhesive.

[0008] In this case, as the ultraviolet curable adhesive,
What is necessary is just to apply so that it may straddle the outer peripheral surface on the sealing part side of the outer case and the seat plate. Further, as the application form of the ultraviolet-curable adhesive, so-called spotting may be applied to a plurality of places, or may be applied over the entire outer peripheral surface on the sealing portion side of the outer case. Then, in order to cure such an ultraviolet curable adhesive, an ultraviolet lamp may be used.

On the other hand, in the method for manufacturing an electronic component according to the present invention, a plate-shaped seat plate is attached to an end face on a sealing portion side of a bottomed cylindrical outer case in which component elements are incorporated, and then the outer case is mounted on the outer case. This is a method for manufacturing an electronic component that prints a predetermined item on a portion other than the end face. The method for manufacturing an electronic component according to claim 2, wherein after printing predetermined items on the outer case with an ultraviolet-curable paint, the ultraviolet light is applied across the outer peripheral surface on the sealing portion side of the outer case and the seat plate. A curable adhesive is applied, and the ultraviolet curable paint and the ultraviolet curable adhesive are simultaneously cured by ultraviolet irradiation. The method for manufacturing an electronic component according to claim 3 of the present invention is further characterized in that, after applying an ultraviolet-curable adhesive to the outer peripheral surface of the outer case over the sealing portion side outer peripheral surface and the seat plate, the ultraviolet light is applied to the outer case. The method is characterized in that predetermined items are printed with a curable paint, and the ultraviolet-curable paint and the ultraviolet-curable adhesive are simultaneously cured by ultraviolet irradiation.

Further, in the method of manufacturing an electronic component according to a fourth aspect of the present invention, after applying an ultraviolet curable adhesive to the outer peripheral surface of the outer case on the side of the sealing portion and the seat plate, the ultraviolet irradiation is performed. After curing the ultraviolet-curable adhesive, a predetermined item is printed on the outer case with the ultraviolet-curable paint, and then the ultraviolet-curable paint is cured by irradiating ultraviolet rays. And
The method for manufacturing an electronic component according to claim 5 of the present invention, after printing predetermined items on the outer case with an ultraviolet-curable paint, curing the ultraviolet-curable paint by ultraviolet irradiation, and then, After applying an ultraviolet curable adhesive over the sealing portion side outer peripheral surface and the seat plate,
The method is characterized in that the ultraviolet-curable adhesive is cured by ultraviolet irradiation.

In these cases, the predetermined items to be printed with the ultraviolet-curable paint may include a manufacturing lot number of the aluminum electrolytic capacitor, a display of a rated voltage, a polarity display, and the like. Printed on

[0012]

In the electronic component according to the first aspect of the present invention, since the ultraviolet curable adhesive is applied over the outer peripheral surface on the sealing portion side of the outer case and the seat plate,
There is no danger of insulation failure at each lead terminal and no danger of the adhesive flowing out to the bottom surface of the seat plate and hardening. In addition, since an ultraviolet-curable adhesive is used as the adhesive, it is cured in a shorter time by irradiating ultraviolet light as compared with a conventional room-temperature-curable adhesive or a heat-curable adhesive, and a manufacturing time. Can be shortened.

On the other hand, in the method for manufacturing an electronic component according to the second and third aspects of the present invention, the step of curing the ultraviolet-curable paint and the ultraviolet-curable adhesive simultaneously by irradiating the ultraviolet rays. Only once. Therefore, the manufacturing time of the electronic component can be shortened. In the method for manufacturing an electronic component according to the fourth and fifth aspects of the present invention, in the method for manufacturing an electronic component, an ultraviolet-curable paint and an ultraviolet-curable adhesive having different curing times by irradiation with ultraviolet light are used. Thus, the above object is achieved.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. In the embodiment described below, FIG.
In the members described in the above, the description is simplified or omitted by attaching the same reference numerals in the drawings.

FIG. 1 shows an embodiment of a chip-formed aluminum electrolytic capacitor to which the present invention is applied. According to this, the aluminum electrolytic capacitor 10 has the same basic structure as the aluminum electrolytic capacitor 20 shown in FIG. 2, and the seat plate 24 has a concave portion 24A in which the outer peripheral surface 21B on the sealing portion side of the outer case 21 is embedded. ,
The four cutouts 11 are provided so that the outer peripheral surface 21B on the sealing portion side is partially exposed from the recess 24A. The exterior case 21 is fixed to the seat plate 24 by the adhesive 12 applied at the four cutouts 11, and a predetermined matter is printed on the top 21 A with the paint 13.

The adhesive 12 is an ultraviolet curable adhesive,
The coating is applied in a so-called spot-like manner over the sealing portion side outer peripheral surface 21B and the seat plate 24. On the other hand, the paint 13 is an ultraviolet curable paint, and the production lot number, the rated voltage display, the polarity display and the like of the aluminum electrolytic capacitor 10 are displayed. Adhesive 12 and paint 1 such as these
3 is cured in a short time (for example, 0.7 seconds or less) when irradiated with ultraviolet rays from an ultraviolet lamp.

Next, a method of manufacturing the aluminum electrolytic capacitor 10 will be described. First, each lead terminal 2 is attached to the seat plate 24.
3, the outer case 21 is assembled to the seat plate 24 so that the outer peripheral surface 21B on the sealing portion side is buried in the concave portion 24A, and each lead terminal 23 is bent in a direction away from each other along the bottom surface of the seat plate 24. And the outer case 21
After printing a predetermined matter with the paint 13 on the top part 21A of the outer case 21, the adhesive 12 over the sealing part side outer peripheral surface 21B of the outer case 21 and the seat plate 24 in the four notches 11
Is applied. Next, ultraviolet rays are irradiated by an ultraviolet lamp or the like (not shown), whereby the paint 13 and the adhesive 12 are simultaneously cured, and the aluminum electrolytic capacitor 10 is obtained.

Alternatively, after the outer case 21 is assembled to the seat plate 24, the adhesive 12 is applied to the four cutouts 11 over the sealing portion outer peripheral surface 21B of the outer case 21 and the seat plate 24. The crown 21 of the outer case 21
A is printed with the paint 13 on A. Next, the adhesive 12 is irradiated with ultraviolet rays by an ultraviolet lamp (not shown) or the like.
And the paint 13 are simultaneously cured to obtain the aluminum electrolytic capacitor 10.

When an adhesive 12 and a paint 13 having different curing times by ultraviolet irradiation are used for manufacturing the aluminum electrolytic capacitor 10, first, the outer peripheral surface 21 B on the sealing portion side of the outer case 21 and the seat plate 24 are formed. After the adhesive 12 is applied, the adhesive 12 is cured by irradiating ultraviolet rays.
After printing a predetermined matter on 1A with the paint 13, the paint 13 may be cured by irradiating ultraviolet rays. Further, after printing predetermined matters on the top 21A of the outer case 21 with the paint 13, the paint 13 is cured by irradiating ultraviolet rays, and then the outer peripheral surface 21B on the sealing portion side of the outer case 21 and the seat plate 24.
The adhesive 13 may be cured by applying ultraviolet light after the adhesive is applied.

According to the above-described embodiment, since the outer case 21 and the seat plate 24 are fixed by the adhesive 12, there is no need for a separate component such as a double-sided adhesive tape as in the conventional case. The number of components of the capacitor 10 can be reduced. Further, since the adhesive 12 is applied over the outer peripheral surface 21 </ b> B on the sealing portion side of the outer case 21 and the seat plate 24, the lead terminals 23 are electrically connected or the seat plate 24 is
There is no danger of flowing out to the bottom surface and hardening, etc., and electrically reliable insulation and connectivity can be obtained. Then, since the adhesive 12 is an ultraviolet curing type, it is cured in a shorter time by irradiating ultraviolet rays as compared with a conventional cold-setting adhesive or a heat-curing adhesive to manufacture the aluminum electrolytic capacitor 10. Time can be shortened. Therefore, the aluminum electrolytic capacitor 10 can be mass-produced in the same time as the conventional one.

Further, since the coating material 13 is also an ultraviolet curing type, it is simultaneously cured by irradiating ultraviolet rays to cure the above-mentioned adhesive 12. Therefore, there is no need for a dedicated process for curing the paint 13, and the manufacturing time of the aluminum electrolytic capacitor 10 can be further reduced.

It should be noted that the present invention is not limited to the above-described embodiment, and improvements, modifications, and the like within a range in which the present invention can be achieved are included in the present invention. For example, the adhesive 12 in the above-described embodiment has been applied in a so-called spot-like manner in the notch 11 so as to straddle the outer peripheral surface 21B on the sealing portion side and the seat plate 24, but the entire area of the outer peripheral surface 21B on the sealing portion side. May be applied. Also, the paint 13 prints on the top 21A of the outer case 21 predetermined items such as a manufacturing lot number of the aluminum electrolytic capacitor 10, a rated voltage display, a polarity display, and the like. And the predetermined items may be printed on items other than the above-described embodiment. And
In the above-described embodiment, the aluminum electrolytic capacitor is exemplified as the electronic component. However, the present invention can be applied to all electronic components which are mounted with a seat plate and are surface-mounted on a printed circuit board.

[0023]

According to the electronic component of the first aspect of the present invention, the adhesive does not cause insulation failure or connection failure of each lead terminal, and can be cured in a short time to shorten the manufacturing time. On the other hand, according to the method for manufacturing an electronic component according to the second and third aspects of the present invention, since the ultraviolet-curable paint and the ultraviolet-curable adhesive are simultaneously cured by ultraviolet irradiation, the production time can be shortened. According to the method for manufacturing an electronic component according to the fourth and fifth aspects of the present invention, in the method for manufacturing an electronic component, an ultraviolet-curable coating material and an ultraviolet-curable adhesive each having a different curing time by ultraviolet irradiation are used. Can be used.

[Brief description of the drawings]

FIG. 1 is a side view and a perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a conventional chipped aluminum electrolytic capacitor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Aluminum electrolytic capacitor which is an electronic component 12 Ultraviolet-curable adhesive 13 Ultraviolet-curable paint 21 Outer case 21B Outer peripheral surface of sealing part 22 Sealing part 23 Lead terminal 24 Seat plate

Claims (5)

(57) [Claims] 1. A bottomed cylindrical outer case in which a component element is incorporated, a pair of lead terminals drawn out from a sealing portion of the outer case, and an end face on the sealing portion side of the outer case. An electronic component having a plate-shaped seat plate, wherein each of the lead terminals penetrates the seat plate and is bent in a direction away from each other along a bottom surface of the seat plate. And the seat plate are fixed with an ultraviolet curing adhesive. 2. After attaching a plate-shaped seat plate to an end face on the side of the sealing portion of the bottomed cylindrical outer case in which the component elements are built, predetermined items are printed on portions other than the end surface in the outer case. In the method for manufacturing an electronic component, after printing predetermined items on the outer case with an ultraviolet-curable paint, an ultraviolet-curable adhesive is applied across the sealing portion-side outer peripheral surface of the outer case and the seat plate, A method for manufacturing an electronic component, comprising simultaneously curing the ultraviolet-curable paint and the ultraviolet-curable adhesive by ultraviolet irradiation. 3. After attaching a plate-shaped seating plate to an end face on the side of the sealing portion of the bottomed cylindrical outer case in which the component elements are built, predetermined items are printed on portions other than the end surface in the outer case. In the method of manufacturing an electronic component, after applying an ultraviolet-curing adhesive over the sealing portion side outer peripheral surface of the outer case and the seat plate, a predetermined item is printed on the outer case with an ultraviolet-curing paint, A method for manufacturing an electronic component, comprising simultaneously curing the ultraviolet-curable paint and the ultraviolet-curable adhesive by irradiation. 4. After attaching a plate-shaped seat plate to an end face on the side of the sealing portion of the bottomed cylindrical outer case in which the component elements are built, predetermined items are printed on portions other than the end surface in the outer case. In the method for manufacturing an electronic component, after applying an ultraviolet-curable adhesive over the sealing portion side outer peripheral surface of the outer case and the seat plate, the ultraviolet-curable adhesive is cured by ultraviolet irradiation, and then, A method for manufacturing an electronic component, comprising printing predetermined items on an outer case with an ultraviolet-curable paint, and then curing the ultraviolet-curable paint by irradiation with ultraviolet light. 5. After attaching a plate-shaped seat plate to an end face on the side of a sealing portion of a bottomed cylindrical outer case in which a component element is incorporated, a predetermined matter is printed on a portion other than the end surface in the outer case. In the method for manufacturing an electronic component, after printing predetermined items on the outer case with an ultraviolet-curable paint, the ultraviolet-curable paint is cured by irradiating ultraviolet rays, and then, the outer peripheral surface of the outer case on the sealing portion side and the seat plate A method of manufacturing an electronic component, comprising applying an ultraviolet-curable adhesive over the substrate and curing the ultraviolet-curable adhesive by irradiating ultraviolet rays.