JPH0722729A - Structure of hybrid integrated circuit device - Google Patents

Abstract

PURPOSE:To integrate lead terminals and integrate it securely and solidly by embedding part of the end of the terminal so that it is exposed to the surface or both surfaces of an insulated synthetic resin substrate and by extending an electric circuit pattern to the exposed part of the end of the lead terminal. CONSTITUTION:The end 6a of a metal lead terminal 6 for external connection is embedded in an insulated synthetic resin substrate 2 with embedded various electronic components 3 and 4 so that part of the end 6a is exposed to the upper surface of the insulated synthetic resin substrate 2. And an extension 7 stretching to an exposed part of the end 6a of the lead terminal 6 is provided on an electric circuit pattern 5 at the upper surface of the insulated synthetic resin substrate 2, and a cover coat 8 is applied. Consequently, the lead terminal 6 can be securely and solidly integrated with the insulated synthetic resin substrate 2 without soldering.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a plurality of electronic parts,
The present invention relates to a hybrid integrated circuit device that is electrically connected and integrated.

[0002]

2. Description of the Related Art In a conventional hybrid integrated circuit device, a plurality of electronic components are mounted by soldering on an insulating substrate made of glass epoxy resin or ceramic, and the electronic components are connected to each other by the insulating substrate. It was configured to electrically connect with a wiring pattern formed in advance on the surface, but this is because of soldering, so the mounting density of electronic components (the number of electronic components that can be mounted per unit area is ) Is low, a heat load is applied during soldering of electronic parts, and the thickness of the body is increased by the amount of the insulating substrate used.

Therefore, Japanese Patent Laid-Open No. 2-63 as a prior art.
In Japanese Patent Laid-Open No. 186 and 283987/1992, a plurality of electronic components are provided in an insulating synthetic resin substrate, and at least some of the connection terminals of each electronic component are at least on the front and back surfaces of the insulating synthetic resin substrate. A hybrid integrated circuit device is provided which is embedded so as to be exposed on one surface, and an electric circuit pattern for electrically connecting the electronic components to each other is formed on one surface of the insulating synthetic resin substrate. is doing.

According to this structure, since soldering is not required for each electronic component, the mounting density of the electronic component can be improved, the heat load on the electronic component can be eliminated, and the insulating substrate is not used. It has the advantage that it can be made thin. By the way, in the hybrid integrated circuit device, when the hybrid integrated circuit device is mounted on a mother printed circuit board or the like in an electric device, the electric circuit pattern in the hybrid integrated circuit device is electrically connected to the electric circuit on the printed circuit board. Therefore, in the hybrid integrated circuit device described in the above publications, the external connection terminal is provided on one surface of the insulating synthetic resin substrate in which a plurality of electronic components are embedded. In the form formed as an electrode film, the electrode film of the external connection terminal is directly soldered to the mother printed board, or a metal lead is attached to the electrode film of the external connection terminal. After soldering the terminals, the lead terminals are soldered to the mother printed board.

[0005]

However, as described in both of the above publications, when the external connection terminals are formed as an electrode film on one surface of an insulating synthetic resin substrate, Since the adhesive strength of the electrode film of the external connection terminal to the insulating synthetic resin substrate is low, when directly soldering this to the mother's printed circuit board, of course, solder the metal lead terminals to it. In that case, there is a problem that the electrode film of the external connection terminal often peels from the insulating synthetic resin substrate.

Particularly, when a lead terminal made of metal is soldered to the electrode film of the external connection terminal, not only a thermal load is applied to each electronic component embedded in the insulating synthetic resin substrate, but also the soldering thereof is performed. The cleaning process and the cleaning solution for the cleaning process are required, which complicates the manufacturing process, resulting in a significant increase in cost. Moreover, the adhesion of the electrode film of the external connection terminal to the insulating synthetic resin substrate Due to the low strength, there is a problem that the tensile strength and bending strength of the lead terminal to be soldered thereto are significantly reduced.

A first technical object of the present invention is to solve each of the above problems in a hybrid integrated circuit device in which a plurality of electronic components are embedded in an insulating synthetic resin substrate. A second technical problem is that, when electric circuit patterns are formed on both front and back surfaces of the insulating synthetic resin substrate, in addition to achieving the first technical problem, the electric circuit patterns on the front and back surfaces are In addition to achieving the first and second technical problems, the third technical problem is to reduce the number of lead terminals, and further increase the density in a hybrid integrated circuit device. Is to try.

[0008]

In order to achieve this first technical object, the present invention provides a plurality of electronic components in an insulating synthetic resin substrate, and a part of the connection terminals in each of the electronic components is The insulating synthetic resin substrate is embedded so as to be exposed on at least one of the front and back surfaces of the insulating synthetic resin substrate, and an electric circuit pattern for electrically connecting the electronic components to each other is formed on one surface of the insulating synthetic resin substrate. In the hybrid integrated circuit device according to the present invention, a base end portion of a metal lead terminal for external connection is exposed in the insulating synthetic resin substrate, and a part of the base end portion is exposed on one surface of the insulating synthetic resin substrate. On the other hand, the electric circuit pattern on one surface of the insulating synthetic resin substrate is extended to the exposed portion at the base end portion of the lead terminal.

In order to achieve the second technical object, according to the present invention, a plurality of electronic components are provided in an insulating synthetic resin substrate, and a part of connection terminals in each electronic component is the insulating synthetic resin substrate. In the hybrid integrated circuit device, which is embedded so as to be exposed on both front and back surfaces in, and on each of the front and back surfaces of the insulating synthetic resin substrate, an electric circuit pattern for electrically connecting the electronic components to each other is formed. A base end portion of a metal lead terminal for external connection is embedded in an insulating synthetic resin substrate so that a part of the base end portion is exposed on both front and back surfaces of the insulating synthetic resin substrate, while the insulating synthetic resin The electric circuit patterns on both the front and back surfaces of the substrate are extended to the exposed portions at the base end portions of the lead terminals.

Furthermore, in order to achieve the third technical object, the present invention provides a plurality of electronic components in an insulating synthetic resin substrate, and a part of the connection terminals of each electronic component is the insulating synthetic resin. In a hybrid integrated circuit device, which is embedded so as to be exposed on both front and back surfaces of a substrate, and on each of the front and back surfaces of the insulating synthetic resin substrate, an electric circuit pattern for electrically connecting the electronic components to each other is formed. In the insulating synthetic resin substrate, a base end portion of a metal lead terminal for external connection is embedded so that a part of the base end portion is exposed on both front and back surfaces of the insulating synthetic resin substrate, while The electric circuit patterns on both the front and back surfaces of the resin substrate are extended to the exposed portion of the base end of the lead terminal, and one of the front and back surfaces of the insulating synthetic resin substrate is further provided. Or both, and to configure said to fix the second insulating synthetic resin substrate with embedded electronic components connected to the electric circuit pattern.

[0011]

[Operation] In this way, inside the insulating synthetic resin substrate in which the electronic components are embedded, the base end portion of the metal lead terminal for external connection is formed, and a part of the base end portion is formed on both sides of the insulating synthetic resin substrate. While embedding so as to be exposed on one surface or both surfaces of the one, by extending the electric circuit pattern on one surface or both surfaces of the insulating synthetic resin substrate to the exposed portion at the base end of the lead terminal, With the lead terminals electrically connected to the electric circuit pattern on one surface or both surfaces of the insulating synthetic resin substrate,
The insulating synthetic resin substrate can be reliably and firmly integrated without soldering.

[0012]

Therefore, according to the present invention, in a hybrid integrated circuit device in which a plurality of electronic components are embedded, when a lead terminal for external connection is fixed to the hybrid integrated circuit device, tensile strength and bending strength of the lead terminal are provided. In addition, since soldering is not required to fix the lead terminals, the manufacturing process can be simplified and the cost can be greatly reduced.

In particular, with the structure described in "Claim 2", as described above, the strength of the lead terminal can be increased and the cost can be reduced, and in addition, the external parts for both electric circuit patterns on the front and back surfaces of the insulating synthetic resin substrate can be achieved. The number of lead terminals can be reduced compared to the case where the lead terminals for connection can also be used and the lead terminals are provided on each of the both electric circuit patterns on the front and back sides, so that the cost can be further reduced and the size can be reduced. It has the effect of achieving weight reduction.

Further, by adopting the structure described in "Claim 3", it is possible to mount the electronic parts in a three-layer structure or a four-layer structure.
It has the effect of increasing the density.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 9 show a hybrid integrated circuit device 1 according to the first embodiment. In this figure, reference numeral 2 indicates an insulating synthetic resin substrate such as an epoxy resin, a polyester resin, an acrylic resin, a polyurethane resin, or a silicon resin, and an electronic device such as an IC having a lead terminal 3a is provided in the insulating synthetic resin substrate 2. A plurality of components 3 and a plurality of electronic components 4 such as chip resistors having terminals 4a are provided, and the lead terminals 3a and a part of the terminals 4a in the electronic components 3 and 4 are the insulating synthetic resin substrate. An electric circuit pattern 5 for electrically connecting the electronic components 3 and 4 to each other is formed on the upper surface of the insulating synthetic resin substrate 2 while being embedded so as to be exposed on the upper surface of 2.

Further, reference numeral 6 designates a lead terminal made of a metal plate formed by bending the base end portion 6a into an appropriate shape such as a loop as shown in FIG. The end portion 6a is embedded in the insulating synthetic resin substrate 2 such that a part of the base end portion 6a is exposed on the upper surface of the insulating synthetic resin substrate 2, while the electrical conductivity on the upper surface of the insulating synthetic resin substrate 2 is increased. The wiring pattern 5 has an extension portion 7 extending to an exposed portion of the base end portion 6a of the lead terminal 6.
Is provided.

Reference numeral 8 is the electric wiring pattern 5.
And an insulating cover coat that covers the entire extension 7 thereof. As described above, the base end portion 6a of the metal lead terminal 6 for external connection is provided in the insulating synthetic resin substrate 2 in which the various electronic components 3 and 4 are embedded, and a part of the base end portion 6a is the insulation composite. The electric circuit pattern 5 on the upper surface of the insulating synthetic resin substrate 2 is provided with an extended portion 7 extending to the exposed portion on the base end portion 6a of the lead terminal 6 while being embedded so as to be exposed on the upper surface of the resin substrate 2. Thus, the lead terminals 6 are electrically connected to the electric circuit pattern 5 on the upper surface of the insulating synthetic resin substrate 2 without being soldered to the insulating synthetic resin substrate 2.
It is possible to surely and firmly integrate them.

The hybrid integrated circuit device 1 according to the first embodiment is manufactured by the method described below. That is, first, as shown in FIG. 4, a molding box A having an open upper surface is used, and an adhesive layer B is applied to the inner bottom surface of the molding box A, and then the adhesive On the upper surface of the layer B, the various electronic components 3 and 4 are
The lead terminals 3a and the terminals 4a in the electronic components 3 and 4 are mounted at predetermined positions so that the lead terminals 3a and the terminals 4a are in contact with the adhesive layer B, and a plurality of lead terminals 6 are attached to the lead terminals 6 respectively. The base end portion 6a of the adhesive layer B is
It is mounted at a predetermined position so as to come into contact with.

Then, an insulating synthetic resin is injected into the molding box A in a liquid state and hardened, and then the molding box A is die-cut, as shown in FIG.
The insulating synthetic resin substrate 2 is molded with the various electronic components 3 and 4 and the base end portion 6a of the lead terminal 6 embedded in the insulating synthetic resin substrate 2. Then, the surface of the insulating synthetic resin substrate 2 is treated to remove the adhesive layer B, and as shown in FIG. 6, a metal layer C is formed by sputtering or the like, and then the metal layer C is photo-etched. By processing, as shown in FIG. 7, the electric circuit pattern 5
Is formed or the conductive paste is screen-printed to form the electric circuit pattern 5. In addition,
Simultaneously with the formation of the electric circuit pattern 5, the extension portion 7 of the electric circuit pattern 5 is formed.

Next, the cover coat 8 is applied to form the hybrid integrated circuit device 1 as shown in FIGS. As a modified example of the first embodiment, the lead terminals 6 are provided on the left and right side surfaces of the hybrid integrated circuit device 1 as shown in FIG. 8, or the lead terminals 6 are shown in FIG. As shown by the dotted line, it may be bent in a right angle direction. Further, the lead terminal 6 may be bent as shown in FIG. 9 to form a surface mount type.

Next, FIGS. 10 to 16 show a hybrid integrated circuit device 11 according to a second embodiment. In the figure, reference numeral 12 indicates an insulating synthetic resin substrate such as an epoxy resin, a polyester resin, an acrylic resin, a polyurethane resin or a silicon resin, and an electronic component such as an IC having a lead terminal 13a in the insulating synthetic resin substrate 12. 13 and a plurality of electronic components 14 such as chip resistors having terminals 14a, and the lead terminals 13a and a part of the terminals 14a in the electronic components 13 and 14 are part of the insulating synthetic resin substrate 12. While being buried so as to be exposed on both the upper surface and the lower surface of the electronic component 13, 1 on each of the upper surface and the lower surface of the insulating synthetic resin substrate 12.
Electrical circuit patterns 15a and 15b for electrically connecting the four are formed.

Further, reference numeral 16 indicates a base end portion 16a in FIG.
2 shows a lead terminal made of a metal plate formed by bending into an appropriate shape such as spectacles, as shown in FIG.
6 to the insulating synthetic resin substrate 12
A part of the base end portion 16a is embedded therein so as to be exposed on both the upper surface and the lower surface of the insulating synthetic resin substrate 12, while the electric wiring patterns 15a and 15b are formed on both upper and lower surfaces of the insulating synthetic resin substrate 12. The extension 17a, 17b extending to the exposed portion of the base end 16a of the lead terminal 16 is provided.

Reference numerals 18a and 18b denote both electric wiring patterns 15a and 15b and their extensions 17a and 1b.
It is an insulating cover coat that covers the entire 7b. Also,
Reference numerals 19a and 19b denote other electronic components such as resistors provided between the electric wiring pattern 15a on the upper surface of the insulating synthetic resin substrate 12 and the electric wiring pattern 15b on the lower surface. Furthermore, also in the second embodiment, the lead terminals 16 can be provided on both the left and right sides of the hybrid integrated circuit device 11 as in the case of FIG. 8 or can be bent at a right angle. Needless to say, it can be bent into a surface mount type in the same manner as 9.

Also in the second embodiment, the lead terminal 16 is embedded in the insulating synthetic resin substrate 12 so that the lead terminal 16 is attached to the insulating synthetic resin substrate 2. On the other hand, it is possible to surely and firmly integrate without soldering. In this case, the lead terminals 16 may be separately provided for the electric wiring pattern 15a on the upper surface of the insulating synthetic resin substrate 12 and for the electric wiring pattern 15b on the lower surface.
As in the embodiment of FIG.
a is an electric wiring pattern 15a on the upper surface of the insulating synthetic resin substrate 12 and an electric wiring pattern 15b on the lower surface.
When the lead terminals 16 are electrically connected to both of the electric circuit patterns 15a and 15b through the extension portions 17a and 17b, respectively, the lead terminals 16 are formed on both front and back surfaces of the insulating synthetic resin substrate 12. Can also be used as a lead terminal for external connection to.

The hybrid integrated circuit device 11 according to the second embodiment is manufactured by the method described below. That is, first, as shown in FIG.
Using the upper molding box A1 and the lower molding box A2 formed in the upper surface open type, the adhesive layer B1 is applied to the inner bottom surface of the upper molding box A1, and then the adhesive layer B1 is formed. The various electronic components 14 are mounted on the upper surface of the electronic components 1
4 is mounted at a predetermined position so that a part of the terminal 14a in 4 contacts with the adhesive layer B1, while the adhesive layer B2 is applied to the inner bottom surface of the lower molding box A2, and then the adhesion is performed. On the upper surface of the agent layer B2, the various electronic components 13, 14, 19a, 19b are attached to the respective electronic components 13,
14 is mounted at a predetermined position so that a lead terminal or a part of the terminal in 14 comes into contact with the adhesive layer B2, and a plurality of lead terminals 16 are attached to each of the lead terminals 16
The base end portion 16a is mounted at a predetermined position so as to contact the adhesive layer B2.

Next, the two boxes A1 and A2 are attached to each other as shown in FIG.
As shown in FIG. 3, the insulating synthetic resin in a liquid state is injected into the inside through the injection port A3 and cured,
As shown in FIG.
As shown in FIG. 4, the insulating synthetic resin substrate 12 is provided with various electronic components 13, 14, 19 in the insulating synthetic resin substrate 12.
A and 19b and the base end portion 16a of the lead terminal 16 are molded in a buried state.

Then, as shown in FIG. 15, a metal layer C is formed on each of the upper and lower surfaces of the insulating synthetic resin substrate 12.
1 and C2 are formed by sputtering or the like, and then both metal layers C1 and C2 are photo-etched to form both electric circuit patterns 15a and 15b as shown in FIG. Both the electric circuit patterns 15 are formed by screen-printing a paste.
a and 15b are formed. In addition, this electric circuit pattern 1
Simultaneously with the formation of 5a and 15b, the electric circuit pattern 1
The extension parts 17a and 17b of 5a and 15b are formed.

Then, by applying the cover coats 18a and 18b, the hybrid integrated circuit device 11 as shown in FIG. 10 is obtained. Furthermore, FIGS.
0 is the hybrid integrated circuit device 2 according to the third embodiment.
1 is shown. In the third embodiment, a plurality of other electronic components 13 ', 14' are mounted on both electric circuit patterns 15a, 15b in the hybrid integrated circuit device 11 according to the second embodiment. is there.

That is, the insulating layers 20a and 20b are formed on the surfaces of the electric circuit patterns 15a and 15b on the upper and lower surfaces of the insulating synthetic resin substrate 12, respectively.
On the surfaces of a and 20b, both electric circuit patterns 15a,
Second electric circuit pattern 15 electrically connected to 15b
a ', 15b' are formed, and the second electric circuit patterns 15a ', 15b' are used to form another plurality of electronic components 1
After mounting 3'and 14 ', each of these electronic components 1
3'and 14 'are embedded in the second insulating synthetic resin substrates 12a and 12b formed on the upper and lower surfaces of the insulating synthetic resin substrate 12, respectively. According to this structure, the mounting of electronic components is made into a four-layer structure. Therefore, the hybrid integrated circuit device 21 can be further densified.

The manufacturing process of the hybrid integrated circuit device 21 according to the third embodiment is the same as that of the second embodiment up to FIG. Circuit pattern 15
As shown in FIG. 18, an insulating layer 20 is formed on the surfaces of a and 15b.
second electric circuit pattern 15a ', 1 via a, 20b
5b 'is formed, and then electronic components 13', 14 'are mounted on each of the second electric circuit patterns 15a', 15b 'as shown in FIG. 19 with a conductive adhesive or the like. , The whole of them is sandwiched between the upper molding box A1 'and the lower molding box A2'.

Next, an insulating synthetic resin in a liquid state is filled in each of the boxes A1 'and A2', and an injection port A is formed in each of them.
By injecting from 3 ', A3 "and hardening,
A method of molding the second insulating synthetic resin substrates 12a and 12b can be adopted. In the third embodiment, one of the second insulating synthetic resin substrates 12a and 12b may be eliminated so that the electronic components may be mounted in a three-layer structure.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a hybrid integrated circuit device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the hybrid integrated circuit device according to the first embodiment of the present invention.

FIG. 3 is a perspective view of a lead terminal used in the first embodiment.

FIG. 4 is a diagram showing a first state in the case of manufacturing the hybrid integrated circuit device according to the first embodiment.

FIG. 5 is a diagram showing a second state in the case of manufacturing the hybrid integrated circuit device according to the first embodiment.

FIG. 6 is a diagram showing a third state in the case of manufacturing the hybrid integrated circuit device according to the first embodiment.

FIG. 7 is a diagram showing a fourth state in the case of manufacturing the hybrid integrated circuit device according to the first example.

FIG. 8 is a diagram showing a modification of the hybrid integrated circuit device according to the first embodiment.

FIG. 9 is a diagram showing another modification of the hybrid integrated circuit device according to the first embodiment.

FIG. 10 is a vertical sectional front view of a hybrid integrated circuit device according to a second embodiment of the present invention.

FIG. 11 is a perspective view of a lead terminal used in the second embodiment.

FIG. 12 is a diagram showing a first state in the case of manufacturing the hybrid integrated circuit device according to the second embodiment.

FIG. 13 is a diagram showing a second state in the case of manufacturing the hybrid integrated circuit device according to the second embodiment.

FIG. 14 is a diagram showing a third state in the case of manufacturing the hybrid integrated circuit device according to the second embodiment.

FIG. 15 is a diagram showing a fourth state in the case of manufacturing the hybrid integrated circuit device according to the second embodiment.

FIG. 16 is a diagram showing a fifth state in the case of manufacturing the hybrid integrated circuit device according to the second embodiment.

FIG. 17 is a vertical sectional front view of a hybrid integrated circuit device according to a third embodiment of the present invention.

FIG. 18 is a diagram showing a first state in the case of manufacturing the hybrid integrated circuit device according to the third embodiment.

FIG. 19 is a diagram showing a second state in the case of manufacturing the hybrid integrated circuit device according to the third embodiment.

FIG. 20 is a diagram showing a third state in the case of manufacturing the hybrid integrated circuit device according to the third embodiment.

[Explanation of symbols]

1,11,21 Hybrid integrated circuit device 2,12,12a, 12b Insulating synthetic resin substrate 3,4,13,14 Electronic component 5,15a, 15b Electric circuit pattern 6,16 Lead terminal 6a, 16a Base end of lead terminal Department

Claims (3)

[Claims] 1. A plurality of electronic components are embedded in an insulating synthetic resin substrate such that a part of connection terminals of each electronic component is exposed on at least one of front and back surfaces of the insulating synthetic resin substrate. Then, in one surface of the insulating synthetic resin substrate, in a hybrid integrated circuit device formed by forming an electric circuit pattern for electrically connecting the electronic components to each other, in the insulating synthetic resin substrate,
The base end portion of the metal lead terminal for external connection is embedded so that a part of the base end portion is exposed on one surface of the insulating synthetic resin substrate, while the base end portion of one surface of the insulating synthetic resin substrate is embedded. A structure of a hybrid integrated circuit device, wherein an electric circuit pattern is extended to an exposed portion at a base end portion of the lead terminal. 2. A plurality of electronic components are embedded in an insulating synthetic resin substrate such that a part of connection terminals of each electronic component is exposed on both front and back surfaces of the insulating synthetic resin substrate, and the insulating synthetic resin is embedded in the insulating synthetic resin substrate. In a hybrid integrated circuit device in which electric circuit patterns for electrically connecting the electronic components to each other are formed on both front and back surfaces of a board, a metal lead terminal for external connection is provided in the insulating synthetic resin board. While embedding the base end portion in such a manner that a part of the base end portion is exposed on both the front and back surfaces of the insulating synthetic resin substrate, the electric circuit patterns on the front and back surfaces of the insulating synthetic resin substrate are connected to the base of the lead terminal. A structure of a hybrid integrated circuit device, wherein the structure is extended to an exposed portion at an end portion. 3. A plurality of electronic components are embedded in an insulating synthetic resin substrate such that a part of connection terminals of each electronic component is exposed on both front and back surfaces of the insulating synthetic resin substrate. In a hybrid integrated circuit device in which electric circuit patterns for electrically connecting the electronic components to each other are formed on both front and back surfaces of a board, a metal lead terminal for external connection is provided in the insulating synthetic resin board. While embedding the base end portion in such a manner that a part of the base end portion is exposed on both the front and back surfaces of the insulating synthetic resin substrate, the electric circuit patterns on the front and back surfaces of the insulating synthetic resin substrate are connected to the base of the lead terminal. Extend to the exposed part at the end, and further embed electronic components connected to the electric circuit pattern on one or both of the front and back surfaces of the insulating synthetic resin substrate. Structure of the hybrid integrated circuit device being characterized in that fixing a second insulating synthetic resin substrate that.