JP2003318334A - Hybrid integrated circuit device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a bonding force between a circuit base board 10 and an insulating resin 16 in a hybrid integrated circuit device 1. <P>SOLUTION: Inclined sections 10B are provided on side surfaces of the circuit base board 10. The inclined sections 10B are formed so as to have shape inclined inward from the upper surface of the circuit base board 10 toward the lower part of the board. Accordingly, the insulating resin 16 is turned around the inclined sections 10B of the circuit base board 10 when the circuit base board 10 provided with the inclined sections 10B is sealed with the insulating resin 16. As a result, an anchor effect can be generated by the inclined sections 10B of the circuit base board 10 and the insulating resin 16. According to this method, the separation of the circuit base board 10 from the insulating resin 16 can be prevented. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid integrated circuit device, and more particularly to a hybrid integrated circuit device capable of improving the adhesiveness between an insulating resin and a substrate.

[0002]

2. Description of the Related Art The structure of a conventional hybrid integrated circuit device will be described with reference to FIG. 12 (A) is a perspective view of the hybrid integrated circuit device 6, and FIG. 12 (B) is X of FIG. 12 (A).
It is a sectional view taken along the line X '.

Referring to FIGS. 12A and 12B, a conventional hybrid integrated circuit device 6 has the following structure. A rectangular substrate 60, a conductive pattern 62 formed on an insulating layer 61 provided on the surface of the substrate 60, a circuit element 63 fixed on the conductive pattern 62, and a circuit element 63.
Thin wire 65 for electrically connecting the conductive pattern 62 with the conductive pattern 62
And the lead 64 electrically connected to the conductive pattern form the hybrid integrated circuit device 6. Then, the hybrid integrated circuit device 6 is completed as a product by sealing the hybrid integrated circuit formed on the surface of the circuit board 60 with an insulating resin or a case material.

Next, a method of manufacturing the hybrid integrated circuit device 6 will be described with reference to FIGS.

Referring to FIG. 13, a large-sized metal substrate 66A
The process of dividing the strip into narrow strips will be described. In FIG.
3A is a plan view of a large-sized metal substrate 66A. Figure 1
3B is a cross-sectional view of the large-sized metal substrate 66A.

With reference to FIG. 13A, a method of dividing a large-sized metal substrate 66A into slender parts will be described. Here, the large-sized metal substrate 66A is divided into elongated parts by the dicing line D4. This division is performed by shearing by shearing force. The elongated metal substrate may be divided into two or more in consideration of workability in the subsequent bonding process and the like. Here, the elongated metal substrate is composed of two metal substrates 66B having different lengths.
Is divided into

Referring to FIG. 13B, a metal substrate 66A
The configuration of will be described. Here, the substrate 66A is a substrate made of aluminum, and both surfaces thereof are anodized. In addition, in order to insulate the metal substrate 66A and the conductive pattern on the surface on which the hybrid integrated circuit is formed, the insulating layer 6 is formed.
1 is provided. Then, a copper foil 68 to be the conductive pattern 62 is pressure-bonded to the insulating layer 61.

Referring to FIG. 14, a process of forming the hybrid integrated circuit 67 on the surface of the elongated metal substrate 66B will be described. In this figure, FIG. 14A is a plan view of an elongated metal substrate 66B on which a plurality of hybrid integrated circuits 67 are formed. Then, FIG. 14B is a cross-sectional view of FIG.

First, a copper foil 68 pressed onto the insulating layer 61.
To form a conductive pattern 62. Here, the conductive pattern 62 is etched on the elongated metal substrate 66B so as to form a plurality of hybrid integrated circuits. In addition, in order to protect the conductive pattern 62, a resin overcoat may be applied on the conductive pattern 62.

Next, a brazing material such as solder is used to fix the circuit element 63 to a predetermined position on the conductive pattern 62. As the circuit element 63, passive elements or active elements can be generally adopted. When mounting a power system element, the element is mounted on a heat sink fixed on the conductive pattern. With reference to FIG. 15, a method of dividing the metal substrate 66B on which the plurality of hybrid integrated circuits 67 are formed into individual circuit boards 60 will be described. Hybrid integrated circuit 6 on the surface
The individual circuit board 60 on which 7 is formed is separated from the metal board 66B by punching out a portion of the circuit board 60 using a pressing machine. Here, the press machine punches the metal substrate 66B from the surface on which the hybrid integrated circuit 67 is formed. Therefore, a margin where the conductive pattern 62 and the circuit element 63 are not formed is formed at the peripheral edge of the circuit board 60.

The circuit board 6 which has been individually separated by the above steps.
0 is completed as a product through steps such as sealing the hybrid integrated circuit 67.

[0012]

However, the above-mentioned hybrid integrated circuit device and the manufacturing method thereof have the following problems.

First, since the side surface of the circuit board is formed perpendicularly to the surface of the circuit board, there is a problem that the adhesiveness between the circuit board and the sealing resin is weak.

Secondly, in the conventional example, the circuit board 60 is separated from the metal board 66B by pressing the metal board 66B from the surface on which the circuit is formed. Therefore, the portion where the bottom surface and the side surface of the circuit board are continuous has a rounded shape. Therefore, in the molding process, the sealing resin wraps around the back surface of the circuit board, and the sealing resin adheres to the back surface of the circuit board. It was made. Therefore, a main object of the present invention is to provide a hybrid integrated circuit device in which the bonding force between the circuit board and the sealing resin is improved.

[0015]

A hybrid integrated circuit device according to the present invention comprises, firstly, a circuit board, a conductive pattern provided on the circuit board, and a circuit element mounted on the conductive pattern. In a hybrid integrated circuit device comprising the circuit board, a conductive pattern, and an insulating resin for sealing the circuit element, the back surface of the circuit board is exposed, and the circuit board is provided on a side surface of the circuit board. By providing an inclined portion that is inclined inward, the bonding between the circuit board and the insulating resin is strengthened.

Secondly, in the hybrid integrated circuit device of the present invention, the side surface of the circuit board has a vertical portion that extends vertically from the surface of the circuit board and an inclined portion that inclines inward of the circuit board. It is characterized by having.

Thirdly, the hybrid integrated circuit device of the present invention is characterized in that the angle formed by the surface of the circuit board and the vertical portion is a right angle.

Fourthly, the hybrid integrated circuit device of the present invention is characterized in that the angle formed by the back surface and the side surface of the circuit board is an obtuse angle.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment of Hybrid Integrated Circuit Device 1) Referring to FIG. 1, the structure of a hybrid integrated circuit device sealed with an insulating resin will be described. Figure 1 (A)
Is a perspective view of the hybrid integrated circuit device 1, and FIG. 1B is a cross-sectional view taken along line XX ′ of FIG.

Referring to FIGS. 1A and 1B,
The structure of the hybrid integrated circuit device 1 will be described. The hybrid integrated circuit device 1 shown in the figure is obtained by sealing the hybrid integrated circuit device 1 with resin.

The insulating resin 16 has a function of sealing a hybrid integrated circuit including the circuit elements 13 and the like provided on the surface of the circuit board 10. As the type of the insulating resin 16, a thermoplastic resin that is sealed by injection molding, a thermosetting resin that is sealed by transfer molding, or the like can be used.

Referring to FIG. 1B, the side surface of the circuit board 10 has a vertical portion 10A and an inclined portion 10B. Specifically, the angle formed by the surface of the circuit board 10 and the vertical portion 10A is a right angle. The angle formed by the back surface of the circuit board 10 and the inclined portion 10B is an obtuse angle. Therefore, when the back surface of the circuit board 10 is exposed and resin sealing is performed as shown in the figure, the insulating resin 16 wraps around the inclined portion 10B, and the anchor is provided between the inclined portion 10B and the insulating resin 16. The effect occurs.

With reference to FIG. 2, the structure of the hybrid integrated circuit formed on the circuit board 10 in the hybrid integrated circuit device 1 of the present invention will be described. 2A is a perspective view of the hybrid integrated circuit device 1, and FIG. 2B is XX of FIG. 2A.
It is sectional drawing in a line.

Referring to FIGS. 2A and 2B,
The hybrid integrated circuit device 1 has the following configuration. That is, the circuit board 10 made of metal, the insulating layer 11 formed on the surface of the circuit board 10, the conductive pattern 12 formed on the insulating layer 11, and the circuit mounted at a predetermined position on the conductive pattern 12. From the element 13 and the like to the hybrid integrated circuit device 1
Is configured. Each of these components will be described in detail below.

As the material of the circuit board 10, a metal such as aluminum or copper is adopted. Alternatively, an alloy may be used as the material of the circuit board 10. Here, the circuit board 10 made of aluminum is adopted, and both surfaces thereof are anodized. The side surface of the circuit board 10 is formed of a vertical portion 10A extending vertically from the upper surface, and an inclined portion 10B extending downward from the vertical portion 10A and inclined inward of the circuit board 10. The reason why the inclined portion 10B is formed on the side surface of the circuit board 10 lies in the manufacturing method thereof. That is, the circuit board 10
Is manufactured by cutting a large metal substrate.
Specifically, first, a V-shaped groove is formed from the back surface of the metal substrate, and then the remaining thickness portion of the surface where the groove is formed is removed. This V-shaped groove portion becomes the inclined portion 10B. It should be noted that a specific manufacturing method for forming the circuit board 10 will be described later in an embodiment for explaining the manufacturing method of the hybrid integrated circuit device.

The insulating layer 11 is formed on the surface of the circuit board 10 and has a function of insulating the conductive pattern 12 and the circuit board from each other. In addition, in order to positively transfer the heat generated from the circuit element 13 to the circuit board 10, the insulating layer 1
1 is highly filled with alumina.

The conductive pattern 12 is provided on the surface of the insulating layer 11 and is made of metal such as copper. Here, the conductive pattern 12 is entirely formed on the surface of the circuit board 10. Specifically, the conductive pattern 12 is also formed near the peripheral end portion within 2 mm from the peripheral end of the circuit board 10. The reason why the conductive pattern 12 can be formed up to the surface of the circuit board 10 in the vicinity of the peripheral end thereof is the method of dividing the circuit board 10. Circuit board 10
Although the details of the method of dividing the circuit board will be described later, in the present invention, the individual circuit boards 10 are separated from the large-sized metal board by cutting the metal board. In the conventional example, since the circuit board is divided by the press, the circuit board 10
A margin was indispensable in the vicinity of the peripheral edge portion of the above, but in the present invention, this margin can be eliminated, and the conductive pattern 12 can be formed on the entire surface of the circuit board 10.

The circuit element 13 is mounted on a predetermined portion of the conductive pattern 12 via a brazing material such as solder. As the circuit element 13, a passive element, an active element, a circuit device or the like can be generally adopted. When mounting a power system element, the element is mounted on a heat sink fixed on the conductive pattern. In the present invention,
The circuit element 13 can be arranged at any position on the circuit board 10. That is, the circuit element 13 can be arranged near the peripheral edge of the circuit board 10. Specifically, it is possible to arrange the circuit element on the surface of the circuit board 10 within 2 mm from the peripheral end portion of the circuit board 10.

The heat sink 13A has a conductive pattern 12
It is mounted in a predetermined place of. Then, a power system element is mounted on the upper surface, and the power system element and the conductive pattern 12 are electrically connected to each other by a metal thin wire 15. Here, the heat sink 13A can be arranged at an arbitrary position on the circuit board 10. Specifically, the heat sink 13A
Can also be arranged near the peripheral edge within 2 mm from the peripheral edge of the circuit board 10. In this way, the circuit board 10
The reason why the heat sink 13A can be arranged up to the surface in the vicinity of the peripheral end portion is because the circuit board 10 is divided.

Although the details of the method of dividing the circuit board 10 will be described later, in the present invention, the individual circuit boards 10 are divided from a large-sized metal board by cutting the metal board. In the conventional example, since the circuit board is divided by pressing, a margin is indispensable near the peripheral end portion of the circuit board 10. Further, since the heat sink 13 on which the power system element is mounted has the highest height in the circuit element 13, it cannot be arranged in the peripheral portion of the circuit board 10. In the present invention, this margin can be eliminated, and the heat sink 13A can be arranged anywhere on the surface of the circuit board 10. The same applies to other circuit elements 13 such as passive elements and active elements.

The lead 14 is fixed to the pad formed of the conductive pattern 12, and has a function of performing input / output with the outside. Further, power elements and the like are mounted face up, and are electrically connected to the conductive pattern 12 by the thin metal wires 15. Furthermore, in the conductive pattern 12, a portion not electrically connected may be overcoated with a resin or the like.

With the structure of the hybrid integrated circuit device 10 as described above, the following effects can be obtained.

First, the conductive pattern 12 is provided on the circuit board 10.
Since it can be formed up to near the end portion, the size of the entire hybrid integrated circuit device can be reduced when the same circuit as the conventional example is formed.

Secondly, since the circuit element 13 can be arranged near the end of the circuit board 10, the degree of freedom in designing the electric circuit can be improved. Further, since the pattern density can be improved, when the same circuit as the conventional example is formed, the size of the entire hybrid integrated circuit device can be reduced.

Fourthly, since the anchor effect is generated between the inclined portion 10B of the circuit board 10 and the insulating resin 16, the circuit board 10 can be prevented from being separated from the insulating resin 16.

Fifth, the portion where the back surface and the side surface of the circuit board 10 are continuous is formed at an obtuse angle and is not rounded. Therefore, in the process of exposing the back surface of the circuit board using the mold and sealing with the insulating resin 16, the insulating resin 16 is prevented from entering the gap between the mold and the circuit board 10. be able to. Therefore, the insulating resin 16 can be prevented from adhering to the back surface of the circuit board 10.

(Second Embodiment for Explaining Method for Manufacturing Hybrid Integrated Circuit Device) A method for manufacturing the hybrid integrated circuit device will be described with reference to FIGS. First, the overall process of this embodiment will be described with reference to the flowchart of FIG. In this embodiment, the hybrid integrated circuit device is manufactured by the following steps. That is, a step of dividing a large-sized metal substrate into a middle-sized metal substrate, a step of forming conductive patterns of a plurality of hybrid integrated circuits on the surface of the middle-sized metal substrate, and an insulation of the middle-sized metal substrate. A step of forming grooves in a lattice pattern on a surface where no layer is provided, a step of die bonding for mounting a circuit element on a conductive pattern, a step of wire bonding, a remaining thickness portion of the groove of the metal substrate, and an insulating layer. The hybrid integrated circuit device is manufactured in a step of separating the individual circuit boards by cutting off. Further, the divided circuit board 10 is sealed with an insulating resin. Each of these steps will be described below.

First Step: See FIG. 4 In this step, a large metal substrate 10A is divided to form an intermediate metal substrate 10B.

First, referring to FIG. 4A, a large metal substrate 10A is prepared. For example, the size of the large-sized substrate 10A is a square of about 1 meter. Here, the metal substrate 10A is an aluminum substrate whose both surfaces are anodized. An insulating layer is provided on the surface of the metal substrate 10A. Further, a copper foil which becomes a conductive pattern is formed on the surface of the insulating layer.

Next, referring to FIG. 4B, the metal substrate 1 is cut along the dicing line D1 by the cut and sew 31.
Divide 0A. Here, the plurality of metal substrates 10A are simultaneously divided by stacking the plurality of metal substrates 10A. The cutting saw 31 rotates at high speed and divides the metal substrate 10A along the dicing line D1. As a method of division, here, a large-sized metal substrate 10A having a square shape is used for the dicing line D1.
The metal substrate 10B is an elongated middle plate by dividing the metal substrate 10B into eight along the line. Here, in the shape of the metal plate 10B of the middle plate, the length of the long side is twice the length of the short knit.

With reference to FIG. 4C, the shape of the cutting edge of the cut and sewn 31 will be described. FIG. 4C is an enlarged view of the vicinity of the blade edge 31A of the cut and sewn 31. The edge of the cutting edge 31A is formed flat and diamond is embedded therein. The metal substrate 10A can be divided along the dicing line D1 by rotating a cutting saw having such a cutting edge at a high speed.

The metal plate 10B of the intermediate plate manufactured by this process is etched to partially remove the copper foil to form a conductive pattern. The number of conductive patterns to be formed depends on the size of the metal substrate 10B and the size of the hybrid integrated circuit, but a conductive pattern forming several tens to several hundreds of hybrid integrated circuits is formed on one metal substrate 10B.
Can be formed.

Second Step: See FIGS. 5 and 6 This step is a step of forming the grooves 20 in a grid pattern on the surface of the metal plate 10B of the intermediate plate on which the insulating layer is not provided. Figure 5
FIG. 5A is a plan view of an intermediate metal plate 10B divided in the previous step, and FIG. 5B is a perspective view showing a state in which a groove is formed in the metal substrate 10A using the V-cut saw 35. 5C is an enlarged view of the blade edge 35A.

Referring to FIGS. 5A and 5B,
The V-cut saw 35 is rotated at a high speed to form a groove on the metal substrate along the dicing line D2. The dicing lines D2 are provided in a grid pattern. The dicing line D2 corresponds to the boundary line between the individual conductive patterns formed on the insulating layer 11.

Referring to FIG. 5C, a V-cut saw 35
The shape of will be described. The V-cut saw 35 is provided with a large number of blade edges 35A having a shape as shown in FIG. Here, the shape of the cutting edge 35A corresponds to the shape of the groove provided in the metal substrate 10A. Here, a groove having a V-shaped cross section is formed on the back surface (surface where the insulating layer 11 is not provided) of the metal substrate. Therefore, the shape of the cutting edge 35A is also V-shaped. A diamond is embedded in the cutting edge 35A.

Next, the shape of the metal substrate 10B in which the groove 20 is formed will be described with reference to FIGS. 6 (A) and 6 (B). FIG. 6A is a perspective view of the metal substrate 10B in which a groove is formed by the cutting saw 31, and FIG. 6B is a cross-sectional view of the metal substrate 10B.

Referring to FIG. 6A, grooves 20 are formed in a grid pattern on the surface of metal substrate 10B where insulating layer 11 is not provided. In the present embodiment, the V-shaped cutting edge 3
Since the groove is formed by using the V-cut saw 35 having 5 A, the groove 20 has a V-shaped cross section. In addition, the center line of the groove 20 is formed by the individual conductive patterns 12 formed on the insulating layer 11.
It corresponds to the boundary line of.

The shape and the like of the groove 20 will be described with reference to FIG. Here, the groove 20 is formed in a V-shaped cross section. The depth of the groove 20 is shallower than the thickness of the metal substrate 10B. Therefore, in this process, the metal substrate 1
OB is not divided into individual circuit boards 10. That is, each circuit board 10 corresponds to the metal substrate 1 corresponding to the groove 20.
It is connected at the remaining thickness of 0B. Therefore, until the circuit board 10 is divided into individual circuit boards 10, the metal board 10B is divided.
Can be treated as one sheet. In addition, when "burrs" are generated in this step, high pressure cleaning is performed to remove the "burrs".

Third Step: See FIGS. 7 to 9 In this step, the circuit element 13 is mounted on the conductive pattern 12 and the circuit element 13 and the conductive pattern 12 are electrically connected.

The process of die bonding for mounting the circuit element 13 on the conductive pattern 12 will be described with reference to FIG. FIG. 7 is a cross-sectional view showing a state in which the circuit element 13 is mounted on the conductive pattern 12. The circuit element 13 is mounted on a predetermined portion of the conductive pattern 12 via a brazing material such as solder. As described above, the conductive pattern 12 is formed on the circuit board 10.
Is also formed in the vicinity of the peripheral edge. Therefore, the circuit element 1
3 can also be mounted near the peripheral edge of the circuit board 10. Further, the heat sink 13A having the power system element mounted on the upper surface is a circuit element having a height as compared with other circuit elements. Therefore, in the conventional method for manufacturing a hybrid integrated circuit device using a press machine, the heat sink 13A could not be arranged near the peripheral end portion of the circuit element 13. As will be described later, in the present invention, the circuit board 10 is individually divided by using a circular cutter. Therefore, the circuit element 13 having a height such as the heat sink 13A
Can be arranged near the peripheral end of the circuit element 13.

The wire bonding process for electrically connecting the circuit element 13 and the conductive pattern 12 will be described with reference to FIG. FIG. 8 shows the circuit element 13 using the thin metal wire 15.
It is sectional drawing which shows the state which electrically connected with the conductive pattern 12. Here, wire bonding is collectively performed on several tens to several hundreds of hybrid integrated circuits formed on one metal substrate 10B.

With reference to FIG. 9, specifically, the metal substrate 10
The hybrid integrated circuit formed in B will be described. FIG. 9 is a plan view of a part of the hybrid integrated circuit 17 formed on the metal substrate 10B. In reality, a larger number of hybrid integrated circuits 17 are formed. Further, the dicing line D3 for dividing the metal substrate 10B into individual circuit boards 10 is shown by a dotted line in the figure. As is clear from the figure, the conductive pattern 12 and the dicing line D2 forming the individual hybrid integrated circuits are formed.
Are very close together. From this, the metal substrate 10
It can be seen that the conductive pattern 12 is formed on the entire surface of B. Furthermore, the circuit element 1 such as the heat sink 13A
It can be seen that 3 is located at the periphery of the hybrid integrated circuit.

In the above description, the hybrid integrated circuits are collectively formed on the surface of the substrate 10B having an elongated shape. Here, when there are restrictions on a manufacturing apparatus for performing die bonding or wire bonding, the metal substrate 10B can be divided into a desired size in a step before this step. For example, when the metal substrate 10B is divided into two in the process before this process, the metal substrate has a square shape.

Fourth Step: See FIG. 10 This step is a step of separating the metal substrate 10B into individual circuit boards 10 by cutting off the remaining thickness portion of the groove of the metal substrate 10B and the insulating layer 11. FIG. 10 (A)
FIG. 6 is a perspective view showing a state in which the metal board 10B is divided into individual circuit boards 10 using the round cutter 41. Figure 10
10B is a sectional view of FIG. Here, although not shown, in FIG. 10A, a large number of hybrid integrated circuits are formed over the insulating layer 11.

With reference to FIG. 10A, the circular cutter 41
Using, the metal substrate 10B is pushed down along the dicing line D3. As a result, the metal board 10B is divided into individual circuit boards 10. The circular cutter 41 is the metal substrate 1
The part of the surface provided with the insulating layer 11 of 0B corresponding to the center line of the groove 20 is pushed down. Here, the groove 20 has a V-shaped cross section. Therefore, the circular cutter 41 cuts off the remaining thickness portion of the metal substrate 10B and the insulating layer 11 in the portion where the groove 20 is formed most deeply.

With reference to FIG. 10B, the circular cutter 41
Will be described in detail. The circular cutter 41 has a disc shape, and its peripheral end portion is formed at an acute angle. The central portion of the round cutter 41 is fixed to the support portion 42 so that the round cutter 41 can freely rotate. The above-mentioned cut-and-sew is rotated by the driving force at high speed, and the metal substrate 10
B was cut. Here, the round cutter 41 has no driving force. That is, a part of the circular cutter 41 is used as the metal substrate 1.
The circular cutter 41 is rotated by moving it along the dicing line D3 while pressing it against 0B. In principle, it is similar to a jig for cutting pizza.

Next, the size of the round cutter 41 will be described. In the place where the groove 20 is formed, the metal substrate 10
The length obtained by adding the remaining thickness of B and the thickness of the insulating layer 11 is defined as d. The length from the top to the surface of the insulating layer 11 of the highest element of the circuit elements 13 is h1. In this case, the radius of the round cutter 41 is set longer than the total length of d1 and h1. By setting in this way, the circuit board 10 can be reliably divided from the metal board 10B. Along with that, round cutter 4
It is possible to prevent the lower end of the support portion 42 that supports 1 from coming into contact with the circuit element 13 and damaging the circuit element 13.

Next, with reference to FIG. 10B, the details of dividing the metal substrate 10B by the circular cutter 41 will be described. As described above, in the present invention, the circuit element 13 having a height such as the heat sink 13A is provided in the circuit board 10.
Can be placed in the peripheral part of the. From this, the position of the heat sink 13A may approach the dicing line D3 as shown in FIG. Even in such a case, the position of the support portion 42 is set as follows so that the support portion 42 does not contact the heat sink 13A.

That is, the distance from the top of the element having the highest height among the circuit elements 13 to the surface of the insulating layer 11 is h1.
In this case, the length h2 from the lower end of the support portion 42 to the surface of the insulating layer 11 is set longer than h1. For example, in the present embodiment, the top of the metal thin wire 15 derived from the power system element mounted on the heat sink 13A is the highest portion in the hybrid integrated circuit. In this case, the lower end of the support portion 42 is set at a position higher than the top of the thin metal wire 15. By setting the position of the lower end of the support portion 42 in this way, it is possible to prevent the metal thin wire 15 from being broken.

Fifth Step: See FIG. 11 Referring to FIG. 11, a step of sealing the circuit board 10 with the insulating resin 16 will be described. FIG. 11 is a cross-sectional view showing a step of sealing the circuit board 10 with the insulating resin 16 using the mold 50.

First, the circuit board 10 is placed on the lower die 50B. Next, the insulating resin 16 is injected from the gate 53. As a method of sealing, a transfer mold using a thermosetting resin or an injection mold using a thermosetting resin can be adopted. Then, the gas inside the cavity according to the amount of the insulating resin 16 injected from the gate 53 is discharged to the outside through the air vent 54.

As described above, the inclined portion 10B is provided on the side surface of the circuit board 10. Therefore, by sealing with the insulating resin, the insulating resin 16 wraps around the inclined portion 10B. From this, an anchor effect occurs between the insulating resin 16 and the inclined portion 10B, and the insulating resin 1
The bond between 6 and the circuit board 10 is strengthened. In addition, the cross-sectional shape of the portion where the back surface of the circuit board 10 and the inclined portion 10B are continuous is formed at an obtuse angle, and is not a rounded shape. Therefore, the insulating resin 1 injected from the gate 53
It is possible to prevent 6 from entering the lower mold 50B and the back surface of the circuit board 10.

The hybrid integrated circuit device sealed with the resin by the above steps is completed as a product through the lead cutting step and the like.

According to this embodiment, the following effects can be obtained.

First, since a large-sized metal substrate is divided by using the cutting saw 31 that rotates at a high speed, a "burr" is generated in comparison with the conventional substrate dividing method using shirring.
Is very rare. Therefore, it is possible to prevent a defective product from occurring due to a short circuit of the hybrid integrated circuit due to "burrs" in the middle of the manufacturing process.

Secondly, since a plurality of large-sized metal substrates 10A that have been overlapped with each other are divided at the same time by using the cutting saw 31, the working efficiency can be improved.

Thirdly, even if the cut-and-sewn 31 is worn, replacement of the cut-and-sewn 31 is a relatively simple operation and can be performed quickly. Therefore, the work efficiency can be improved as compared with the conventional shirring blade replacement.

Fourth, grooves are formed in the metal substrate 10B at the portions corresponding to the boundaries of the individual circuit boards 10. Therefore, when the metal substrate 10B is transported, the metal substrate 10
Even if “bending” occurs in the entire B, the groove 20 is preferentially bent. Therefore, it is possible to prevent the flatness of the individual circuit boards 10 from being impaired.

Fifth, it becomes possible to incorporate several tens to several hundreds of hybrid integrated circuits in one metal substrate 10B. Therefore, the etching process, the die bonding process, and the wire bonding process can be collectively performed. From this, productivity can be improved.

Sixth, in the step of dividing the metal substrate 10B into the individual circuit boards 10, the circular cutter 41 having no driving force is pressed against the metal substrate 10B to rotate the metal substrate 10B. It is divided. Therefore, the circular cutter 41 cuts off the remaining thickness of the groove 20 and the insulating layer 11, so that no grinding dust is generated. Therefore, it is possible to prevent the hybrid integrated circuit from short-circuiting during the manufacturing process.

Seventh, the metal substrate 10B is divided by pressing the circular cutter 41 against the portion corresponding to the groove 20. Therefore, it is possible to prevent the occurrence of cracks in the resin layer 11 and the reduction in the pressure resistance of the device.
Furthermore, the flatness of the substrate 10B can be ensured.

Eighth, even when the round cutter 41 is worn, replacement of the round cutter 41 is a relatively simple operation and can be performed in a short time. From this, productivity can be improved.

Ninth, in the present invention, the individual circuit boards are separated by "cutting" the metal board using the cut saw 31 and the round cutter 41. When the circuit board is separated using a press machine as in the conventional example,
It was necessary to prepare different blades according to the size of the circuit board to be manufactured. According to the present invention, even in the case of manufacturing a hybrid integrated circuit device having circuit boards of different sizes, it is possible to deal with it only by changing the dicing line.

Tenth, in the present invention, one metal substrate 1
A large number of hybrid integrated circuits are incorporated in a matrix in OB. Since the hybrid integrated circuits are extremely close to each other, the circuit board 10 is formed on almost the entire surface of the metal board 10B.
Therefore, the waste loss of the material can be reduced.

[0075]

According to the present invention, the following effects can be obtained.

First, in the hybrid integrated circuit device in which the circuit board 10 is exposed and the whole is sealed with the insulating resin 16,
By providing the inclined portion 10B on the side surface of the circuit board 10, the adhesiveness between the insulating resin 16 and the circuit board 10 can be improved. Therefore, it is possible to prevent the circuit board 10 from being separated from the insulating resin 16.

Second, since the circuit board 10 is manufactured by dicing, the cross-sectional shape of the portion where the back surface of the circuit board 10 and the inclined portion 10B are continuous has an obtuse angle. That is, the shape of the part where the back surface and the side surface of the circuit board 10 are continuous is not rounded. Therefore, the back surface of the circuit board is exposed by using a mold and the insulating resin 16
It is possible to prevent the insulating resin 16 from entering the gap between the mold and the circuit board 10 in the step of sealing with. Therefore, the insulating resin 16 can be prevented from adhering to the back surface of the circuit board 10.

[Brief description of drawings]

FIG. 1 is a perspective view (A) and a sectional view (B) of a hybrid integrated circuit device of the present invention.

FIG. 2 is a perspective view (A) and a sectional view (B) of a hybrid integrated circuit device of the present invention.

FIG. 3 is a flowchart illustrating a method for manufacturing the hybrid integrated circuit device of the present invention.

FIG. 4 is a plan view (A), a perspective view (B) and an enlarged view (C) illustrating a method for manufacturing a hybrid integrated circuit device according to the present invention.

FIG. 5 is a plan view (A), a perspective view (B) and an enlarged view (C) illustrating a method for manufacturing a hybrid integrated circuit device according to the present invention.

FIG. 6 is a perspective view (A) and a sectional view (B) illustrating a method for manufacturing a hybrid integrated circuit device of the present invention.

FIG. 7 is a cross-sectional view illustrating the method for manufacturing the hybrid integrated circuit device of the present invention.

FIG. 8 is a cross-sectional view illustrating the method of manufacturing the hybrid integrated circuit device of the present invention.

FIG. 9 is a plan view illustrating the method for manufacturing the hybrid integrated circuit device of the present invention.

FIG. 10 is a perspective view (A) and a sectional view (B) illustrating a method for manufacturing the hybrid integrated circuit device of the present invention.

FIG. 11 is a cross-sectional view illustrating the method for manufacturing the hybrid integrated circuit device of the present invention.

FIG. 12 is a perspective view (A) and a sectional view (B) of a conventional hybrid integrated circuit device.

FIG. 13 is a plan view (A) and a sectional view (B) illustrating a conventional method for manufacturing a hybrid integrated circuit device.

FIG. 14 is a plan view (A) and a sectional view (B) illustrating a conventional method for manufacturing a hybrid integrated circuit device.

FIG. 15 is a plan view illustrating a method for manufacturing a conventional hybrid integrated circuit device.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Motoichi Nezu             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Kazuki Mogi             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Mitsuru Noguchi             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. F-term (reference) 4M109 AA01 BA03 CA21 DB16

Claims (4)

[Claims] 1. A circuit board, a conductive pattern provided on the circuit board, a circuit element mounted on the conductive pattern, and a back surface of the circuit board exposed to expose the circuit board, the conductive pattern, and In a hybrid integrated circuit device including an insulating resin that seals the circuit element, the side surface of the circuit board is provided with an inclined portion that is inclined toward the inside of the circuit board, thereby insulating the circuit board from the insulation. A hybrid integrated circuit device characterized by strengthening bonding with a resin. 2. The side surface of the circuit board has a vertical portion that extends vertically from a surface of the circuit board, and an inclined portion that inclines inward of the circuit board.
A hybrid integrated circuit device as described. 3. The hybrid integrated circuit device according to claim 1, wherein an angle formed by the surface of the circuit board and the vertical portion is a right angle. 4. The hybrid integrated circuit device according to claim 1, wherein an angle formed by a back surface and a side surface of the circuit board is an obtuse angle.