JPH1177687A - Resin molded electronic component and method of manufacturing the same - Google Patents

Abstract

[PROBLEMS] To provide a resin-molded electronic component having good assembling workability and having no deformation of metal terminals inside the resin. A metal terminal (3) is fixed to a resin piece (1) using a mold in advance, and a resin piece (1) with the metal terminal (3) fixed to a metal mold (not shown) is formed by forming a part of the resin piece (1). Is molded so that is exposed. The resin piece 1 prevents the metal terminal 3 from being deformed by casting pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semiconductor device such as a power module or an intelligent power module (hereinafter, referred to as IPM) having a plurality of control signal metal terminals led out of a housing and a plurality of such devices. The present invention relates to a resin-molded electronic component such as a case or a connector having metal terminals.

[0002]

2. Description of the Related Art Structures conventionally used in resin-molded electronic components such as power modules having a plurality of metal terminals for control signals, semiconductor devices such as IPMs, and cases and connectors having a plurality of metal terminals. Figure 7
Shown in FIG. 7A is an overall perspective view, and FIG. 7B is a partially enlarged sectional view of a signal metal terminal portion. Metal terminal 23
Are inserted one by one into the resin portion 24 of the resin case 25 and fixed with a thermosetting epoxy resin or the like.

FIG. 8 shows a conventional molded resin portion and a metal terminal. FIG. 8 (a) is a plan view, and FIG. 8 (b) is a side view of FIG. FIG. The metal terminal 43 is a model of a signal metal terminal portion such as an IPM. In FIG. 8, the metal terminal 43 is fixed to a mold (not shown) at the portions A and B at the time of the main molding, but the resin (for example, PPS: Poly P:
henyrene Sulfide polyphenylene sulfite, PB
Due to the pressure of T (Poly Butylene Terephthalate or the like) (the casting pressure of the molding resin), the metal terminal 43 is bent at the E portion in the resin portion 44. In this case, the metal terminal of the outer portion protruding from the resin does not deform when the molding resin is cast as indicated by a dotted line (43a). However, after that, when the resin hardens and is taken out of the mold, the outside of the metal terminal 43 also bends obliquely due to spring back (return by a spring action).

FIG. 9 is a cross-sectional view showing a metal terminal portion having a large deformation amount in a resin portion. Due to the casting pressure of the resin, the metal terminals 53 are greatly deformed inside the resin portion 54, and the metal terminals 53 come into contact with each other to be in a short circuit state. In the case of such a structure in which the metal terminal 53 is fixed with a thermosetting epoxy resin or the like, the metal terminal 53 is fixed by the casting pressure of the resin.
In order not to bend, a dedicated fixing jig for positioning is required, and the assembling workability is not good.

[0005]

As described above, in the conventional resin molding, the metal terminal is deformed by the casting pressure inside the resin. In order to suppress this deformation, a jig for positioning the metal terminal is required, and positioning using the jig has a disadvantage that workability is poor. SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, to improve the assembly workability, and
An object of the present invention is to provide a resin-molded electronic component in which a metal terminal is not deformed inside a resin.

[0006]

In order to achieve the above-mentioned object, in an electronic component having a metal terminal formed by molding a resin by casting a resin into a mold, the metal terminal forms a support and the support. It is configured to be supported by the covering resin. It is preferable that at least a part of the support is exposed from the resin. In addition, put the metal terminal supported by the support into the mold,
The resin may be cast after a part of the support is fitted to a part of the mold. Further, a plurality of metal terminals are supported by being fitted into a plurality of protrusions of the mold provided in the mold,
The resin may be cast.

As described above, the bending of the metal terminal is prevented by inserting the support into the mold and fixing the portion corresponding to the portion E in FIG. By fitting the support to the mold,
The support and the metal terminal can be fixed at a predetermined position. In addition, by making a part of the support visible from the outside, it is possible to later check whether the support is left in the mold or whether there is any displacement.

As described above, by improving the support for holding the metal terminal or the mold, it is possible to accurately position the metal terminal and the support, and at the same time, prevent the metal terminal from being deformed inside the resin portion. .

[0009]

FIG. 1 shows a first embodiment of a resin-molded electronic component according to the present invention. FIG. 1 (a) is a plan view and FIG. 1 (b).
Is a side view as seen from arrow A. In FIG. 1, the metal terminal 3 is fixed to the resin piece 1 through a die in advance. In this case, since the volume of the resin piece 1 is smaller than that of the resin portion 4 to be completely molded, the metal terminal 3 is not bent by the casting pressure. Next, the resin piece 1 to which the metal terminal 3 is fixed is set in a metal mold (not shown) to be fully molded, and the resin piece 1 is molded so that a part of the resin piece 1 is exposed. This part is the exposed part 2
Becomes Since the metal terminal 3 is fixed by the resin piece 1, the metal terminal is prevented from being deformed inside the resin portion 4 by the casting pressure. Also, by providing the exposed portion 2, the resin piece 1
It is possible to inspect the resin pieces 1 and the metal terminals 3 for misplacement after the molding. As a method for previously fixing the metal terminal 3 to the resin piece 1 by using a mold as described above, FIG.
The productivity is improved as compared with the case where the metal terminal 3 is inserted into the resin piece 1 manually as described in (1).

The upper and lower thicknesses of the resin piece 1 are set to 0.0
By increasing the size by 1 mm to 0.02 mm, the resin piece 1 can be reliably pressed by the mold to be completely molded, and the resin piece 1 can be prevented from moving with respect to the inflow resin pressure. This can prevent the metal terminal 3 from being deformed inside the resin portion 4.

FIG. 2 is a view of inserting a metal terminal into a resin piece. As a method of fixing the metal terminal 3 to the resin piece 1, in addition to the method of performing resin casting using a mold as described in FIG.
As shown in FIG. 2, there is also a method of manually inserting the metal terminal 3 into the resin piece 1 having the hole 9 formed in advance. In this case, assemblability is not good as compared with FIG. The metal terminals 3 shown here are those used in IPM as an example.

FIG. 3 shows a second embodiment of the present invention.
Is a diagram set in a mold. A tapered convex portion 7 is provided on the resin piece 1, and a tapered concave portion 8 is provided on a mold 10 (a combination of the upper mold 5 and the lower mold 6) of the main molding which is opposed thereto. The mold 10 and the resin piece 1 can be accurately positioned at a portion C (in the circle) where the tapered convex portion 7 and concave portion 8 are located.

Further, as described with reference to FIG. 1, by setting the clearance between the concave portion 8 of the mold 10 and the convex portion 7 of the resin piece 1 to be −0.01 mm to 0.02 mm, the upper mold 5, The resin block 1 is firmly pressed by the lower die 6, and the resin block 1 can be prevented from moving with respect to the inflow resin pressure. By doing so, the deformation of the metal terminal 3 is prevented. The resin portion 4 after molding is indicated by a dotted line.

FIG. 4 is a sectional view showing a third embodiment of the present invention, in which metal terminals are set in a mold. The convex portion 11 is provided on the lower mold 6 of the mold, and the concave portion 12 facing the convex portion 11 is provided on the upper mold 5 of the mold so that they engage with each other. By sandwiching the metal terminal 3 between the protrusions 11 of the lower mold 6 of the mold, the metal terminal 3 does not move due to the casting pressure even when the resin is injected from the direction of arrow F. By doing so, it is possible to prevent the metal terminal 3 from being deformed inside the resin portion 4 without using a resin piece. In addition, the resin part 4 after molding is shown by a dotted line.

FIG. 5 shows the finished product molded in FIG. 4. FIG. 5 (a) is a side view of the whole, FIG. 5 (b) is an enlarged view of a portion D in FIG. 4 (a), and FIG. FIG. 3B is a side view cut along the line YY. FIG. 4A is a side view of the completed product when FIG. The hatched portion in FIG. 3C is a cut portion of the resin portion. In the resin portion 4 removed from the mold, a convex portion 11 provided in the mold is provided as a hole 13 (through hole) in the metal terminal 3.
Formed between them. However, this hole 13 does not hinder the product structure, and the finished product can be used sufficiently.

FIG. 6 is a schematic view showing a fourth embodiment of the present invention, in which a metal terminal is inserted into a resin piece by an automatic machine. The metal terminal 3 set on the rail 16 is the upper push rod 15
Is inserted one by one into the hole 9 of the resin piece 1 on the carrier 17. For example, the productivity can be greatly improved by automating a series of operations such as aligning the metal terminals 3 by installing a device that applies vibration to the rail 16 and automating the movement of the push rod.

In the above series of explanations, the support is described as a piece made of resin (resin piece), but may be a piece made of an insulating material other than resin.

[0018]

According to the present invention, it is possible to prevent the metal terminal in the resin portion from being deformed by setting the resin piece having the metal terminal fixed to the mold for the main molding and molding the resin.
The resin piece can be positioned by providing a protrusion on the resin piece and providing a recess on the mold and fitting (fitting) each other. Thereby, the metal terminal can be positioned at a predetermined position of the resin portion. Further, by exposing a part of the resin piece, it is possible to prevent forgetting to insert the resin piece. In addition, the metal terminal can be penetrated and fixed to the resin piece by a mold, or the metal terminal can be inserted into the resin piece by an automatic machine to improve the assemblability. Further, by providing a plurality of protrusions on the mold and holding the metal terminals between the protrusions, it is possible to prevent the metal terminals from being deformed at the resin portion without using a resin piece. Thus, the quality of the product and the productivity can be improved by improving the resin piece or the mold.

[Brief description of the drawings]

FIG. 1A is a plan view of the first embodiment of the present invention, and FIG.

FIG. 2 is a diagram showing a state where a metal terminal is inserted into a resin piece;

FIG. 3 is a view showing a state in which a resin piece is set in a mold according to a second embodiment of the present invention;

FIG. 4 is a sectional view showing a state in which a metal terminal is set in a mold according to a third embodiment of the present invention;

5 (a) is an overall side view, FIG. 5 (b) is an enlarged view of a D portion of FIG. 4 (a), and FIG.
-Side view cut along the Y line

FIG. 6 is a conceptual diagram of inserting a metal terminal into a resin piece by an automatic machine according to a fourth embodiment of the present invention.

FIGS. 7A and 7B show a conventionally used structure, wherein FIG. 7A is an overall perspective view and FIG. 7B is a cross-sectional view of a signal metal terminal portion.

FIG. 8 shows a conventional molded resin portion and metal terminal, (a)
Is a plan view, and (b) is a side view of (a) viewed from an arrow A.

FIG. 9 is a cross-sectional view showing a metal terminal and a resin portion having a large deformation amount when molded by a conventional method.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 resin piece 2 exposed part 3 metal terminal 4 resin part 5 mold upper mold 6 mold lower mold 7 convex part 8 concave part 9 hole 10 mold 11 convex part 12 concave part 13 hole 15 push rod 16 rail 17 carrier 23 Metal terminal 24 Resin part 25 Resin case 43 Metal terminal 43a Metal terminal 44 Resin part 53 Metal terminal 54 Resin part F Resin flow direction

Claims (4)

[Claims] 1. An electronic component having a metal terminal formed by molding a resin by casting a resin into a mold, wherein the metal terminal is supported by a support and a resin covering the support. Resin molding electronic parts. 2. The resin-molded electronic component according to claim 1, wherein at least a part of said support is exposed from said resin. 3. A resin molding, wherein a metal terminal supported by a support is put into a mold, a part of the support is fitted into a part of the mold, and a resin is cast. Method of manufacturing electronic components. 4. A resin-molded electronic component according to claim 1, wherein a plurality of metal terminals are fitted into and supported by a plurality of convex portions of the mold provided in the mold, and a resin is cast. Production method.