JPH0737360Y2 - Integrated circuit parts - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a metal shield case for a predetermined circuit (wiring conductor,
The present invention relates to an integrated circuit component covering an integrated circuit substrate (hereinafter, simply referred to as a circuit substrate) on which various electronic components are formed, and particularly to an integrated circuit component using a clip lead terminal as an input / output means.

[Conventional technology]

Conventionally, an integrated circuit component has an inner lead terminal for supplying power and inputting / outputting various signals to / from a circuit board on which a predetermined wiring conductor is formed and various electronic components such as an IC chip, a resistor, and a capacitor are mounted. The clip lead terminals were attached and the circuit board was covered with a metal shield case (Shokai Sho 62-49287, etc.).

FIG. 2 shows an integrated circuit component using the inner lead terminal 43. The inner lead terminal 43 has a predetermined wiring formed near the inside of the circuit board 41 to prevent a short circuit with the metal shield case 42. It was inserted and erected in the conductive through hole that connects to the conductor. Then, they were mechanically joined with solder 44 or the like and electrically connected.

However, in the above-described structure, manual work is required to insert and stand the inner lead terminal 43 in the through hole, resulting in low productivity.

Further, FIG. 3 shows an integrated circuit component using the clip lead terminal 53. The clip lead terminal 53 is held so as to be sandwiched in the thickness direction of the board at the end of the circuit board 51 on which the input / output pad 54 is formed.
It was mechanically joined to 54 with solder, etc., and electrically connected.

In this case, by using the clip lead terminals 53 that are integrally connected to the lead frame and correspond to the intervals between the plurality of input / output pads 54 arranged at the ends of the circuit board 51, the clip leads can be easily used by an automatic machine. The terminal 53 can be attached.

As described above, the circuit board 51 using the clip lead terminals 53 is relatively easy to be handled by an automatic machine, and thus is convenient for mass production and has been used more frequently than before.

However, when the metal shield case 52 is covered, the thickness of the lead portion of the clip lead terminal 53 protrudes from the end portion of the circuit board 51, so that a short circuit with the metal shield case 52 occurs. .

Therefore, as shown in Japanese Utility Model Laid-Open No. 62-49287, the metal shield case 52 having an opening 55 having a shape sufficiently larger than the shape of the circuit board 51 is used to cover the opening of the metal shield case 52. The clip lead terminal 53 penetrated through 55, and a bottom substrate 56 for fixing the clip lead terminal 53 was fitted.

Although not shown in the drawing, a cutout portion for attaching the Kup lead terminal is formed in a part of the end portion of the circuit board, and the Kup lead terminal is attached to the notch portion. The notch formed a gap between the metal shield case and the cup lead terminal.

[Problems to be solved by the device]

However, in the case of the integrated circuit component shown in FIG. 3, the circuit board 51 to which the clip lead terminals 53 are attached is housed in the metal shield case 52, and the opening 55 of the metal shield case 52 is
The bottom substrate 56 is fitted, which requires manual work during assembly.

In particular, it is necessary to penetrate the bottom substrate 56 so that a plurality of clip lead terminals 53 can be simultaneously extended to the outside.
The manual work becomes very difficult.

After all, a large number of clip lead terminals 53 that can be attached at the same time
Even if the circuit board 51 has a metal shield case
When stored in 52, it was not possible to fully reflect the effect.

In the latter case, since the circuit board has a different shape because the cutout is formed in the circuit board, it is difficult to handle and position the wiring conductor of the circuit board in the step of forming the wiring conductor and other steps, and the pattern of the wiring conductor is formed. It imposes great constraints on the design.

The present invention has been devised in view of the above problems,
It is an object of the present invention to provide an integrated circuit component that can easily mount an integrated circuit substrate having a clip lead terminal on a shield case.

[Specific means for achieving the above object]

According to the present invention, a rectangular circuit board in which a predetermined circuit including an input / output pad is formed, and a clip lead terminal connected to the input / output pad is attached to one of the opposing end portions of the circuit is formed into a rectangular circuit board. In an integrated circuit component that is covered with a metal shield case having an opening, the width between the facing ends of one of the openings of the metal shield case is defined by the one end of the circuit board. With a width greater than the width between the parts, the circuit board is arranged at a substantially central portion between the ends of the opening of the metal shield case, and by the bent portion bent from the side surface of the metal shield case to the inside, By sandwiching the one of the opposing ends of the circuit board, a gap is provided between the one of the opposing ends of the circuit board to which the clip lead terminal is attached and the side surface of the shield case. Is an integrated circuit parts provided.

[Action]

According to the above-mentioned configuration, the rectangular circuit board having the clip lead terminals attached to one of the facing end portions is provided with the opening portion larger than the width between the one facing end portions of the circuit board. It is covered by a metal shield case with a large width between the opposite ends of one side. The circuit board is positioned and fixed by sandwiching one of the opposite ends of the circuit board from the plane direction with a plurality of bent portions formed by bending the side surface of the metal shield case inward. is doing.
Then, the circuit board is fixed in the vicinity of the substantially central portion between the opposing ends of the opening of the metal shield case.

For this reason, since a predetermined gap is formed between the clip lead terminal and the metal shield case, even if the clip lead terminal slightly protrudes from the end of the circuit board, there is no contact with the metal shield case. Absent.

In addition, the circuit board is sandwiched in the plane direction by a plurality of bent portions formed on a part of the side surface of the metal shield case, and the circuit board is positioned and fixed to the metal shield case. In addition, the bottom substrate is not needed to fix the circuit board.

Further, since the circuit board has a rectangular shape, it is easy to handle, and there are less restrictions on mounting wiring conductors and electronic components formed on the main surface of the circuit board.

〔Example〕

Hereinafter, the integrated circuit component of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an integrated circuit component of the present invention, which is shown in FIG.
Is an exploded perspective view, and FIG. 1B is a bottom view of the opening side of the shield case.

In the integrated circuit component 10, a predetermined circuit including an input / output pad 12 is formed, and the input / output pad is provided at one of the opposing ends.
It is composed of a rectangular circuit board 1 to which clip lead terminals 3 connected to 12 are attached, and a metal shield case 2 covering the circuit board 1.

In the circuit board 1, wiring conductors made of a conductor film or the like are formed on the surface of the substrate made of, for example, glass-epoxy resin, ceramics, etc., and further, active components such as IC chips and the like are provided on predetermined wiring conductors including the input / output pads 12. Various electronic components such as passive components such as resistors and capacitors are mounted.

The circuit board 1 may be a double-sided circuit board on which electronic components are mounted by forming wiring conductors on the back surface as well as on the front surface, or a circuit operation on the front surface side, for example, a circuit operating at high frequency is formed. In this case, the shield conductor film may be formed on substantially the entire back surface of the substrate.

Output pads 12 for supplying power to a predetermined circuit and for inputting / outputting signals are arranged at predetermined intervals at a pair of end portions 11 of the circuit board 1 which face each other.
A clip lead terminal 2 that holds the end portion 11 of the substrate 1 in the thickness direction is arranged in the portion. Then, the clip lead terminals 3 and the input / output pads 12 are electrically connected and mechanically joined by solder 13 joining.

That is, at the end portion 11 of the circuit board 1 to which the clip lead terminal 3 is attached, the lead portion thickness of the clip lead terminal 3 projects.

The circuit board 1 to which the clip lead terminals 3 are attached is covered with a case-shaped metal shield case 2.

The shield case 2 has an opening 14 larger than the outer shape of the circuit board 1 so that a predetermined space A is formed between the shield case 2 and the end 11 of the circuit board 1 to which the clip lead terminals 3 are attached.
have.

That is, the width between the opposing ends of the opening 14 of the metal shield case 2 (the width of the end B) is defined as the distance between the opposing ends 11 and 11 of the circuit board 1. The circuit board 1 is arranged approximately at the center of the width of the opening 14 of the metallic shield case 2 on the side of the end B, which is larger than the width.

Thus, even if the circuit board 1 protruding by the thickness of the lead portion of the clip lead end 3 is covered with the metal shield case 2, a gap A is formed between the inner side surface of the metal shield case 2 and the clip lead terminal 3. Are formed and there is no short circuit between them.

A ground terminal 15 is formed in a part of the opening 14 of the shield case 2 so as to project downward from the metal shield case 2 and correspond to the length of the clip lead terminal 3. The ground terminal 15 serves to electrically bring the shield case 2 to the ground potential and to firmly fix the integrated circuit component 10 to the mother circuit board (not shown).

Next, in the above-described configuration in which the shape of the opening 14 of the metal shield case 2 is larger than the outer dimensions of the circuit board 1,
Positioning and fixing of the circuit board 1 in the metal shield case 2 will be described.

First, in positioning the circuit board 1 in the vertical direction, the circuit board 1 is extruded inward from the outside to the side surface of the metal shield case 2 that abuts the end B of the circuit board 1 to which the clip lead terminals 3 are not attached. It is performed by the convex portion 16.

That is, the circuit board 1 is placed in the opening 14 of the metallic shield case 2.
, The end on the front surface side of the circuit board 1 has the convex portion.
By contacting with 16, the vertical positioning of the circuit board 1 is achieved.

Next, the positioning in the plane direction is performed by the metal shield case 2
Circuit board 1 with no clip lead terminals 3 attached
Is formed by a plurality of bent portions 17 that are bent inwardly on the side surface that abuts the end portion B. Then, for example, the two bent portions 17 sandwich the vicinity of the corner portions of the end portions 11 of the circuit board 1 to which the clip lead terminals 3 are attached, and outline the end portion B of the metal shield case 2 The circuit board 1 is arranged so that the approximate center between the ends 11 of the circuit board 1 is located at the center.

That is, when the circuit board 1 is housed in the metal shield case 2 having the bent portions 17 as described above, the circuit board 1 is placed in a predetermined position by fitting the circuit board 1 between the two bent portions 17. .

Next, the circuit board 1 and the metal shield case 2 are fixed by soldering 19 between the back surface of the circuit board 1 and the side surface portion of the metal shield case 2.
At this time, the above-mentioned solder-bonding conductor land 18 is formed at least at the end portion of the back surface of the substrate 1 that does not affect the predetermined circuit of the circuit board 1 or the clip lead terminal 3 at all. The above-mentioned solder 19 is bonded between 18 and the side surface portion of the metal shield case 2.

When a shield conductor is formed on the entire back surface of the circuit board 1 for the purpose of shielding the opening of the metal shield case 2, the shield conductor and the solder bonding conductor land 18 are also used. be able to. With this configuration, the shield conductor formed on the entire back surface of the circuit board 1 can be easily set to the ground potential via the ground terminal 15.

If the shield conductor cannot be formed on the back surface of the circuit board 1, the shield conductor may be formed on the surface of the mother board facing the integrated circuit component.

According to the above-mentioned structure, the circuit board 1 to which the clip lead terminals 3 are attached is placed in the metallic shield case 2 with the bent portions 17 sandwiching the end portions 11 of the circuit board 1 from the plane direction. The clip lead terminal 3 and the metal shield case 2 form a predetermined gap A.

Therefore, the circuit board 1 can be stably and easily arranged at a predetermined position of the metal shield case 2 without short-circuiting the clip lead terminal 3 and the metal shield case 2.

Further, since the circuit board 1 has a rectangular shape, the clip lead terminals 3 can be easily attached by an automatic machine, and high productivity can be maintained. Furthermore, the wiring conductor can be routed freely and various electronic components can be used. There are few restrictions on the mounting position of the components, and the mounting efficiency of the wiring conductors and electronic components on the surface of the circuit board 1 is excellent.

That is, as a whole, a product having excellent productivity and high quality can be stably manufactured.

[Effect of device]

As described above, according to the present invention, the circuit board on which the predetermined circuit including the input / output pad is formed and the clip lead terminal connected to the input / output pad is attached to the end of the predetermined circuit is covered with the metal shield case. In the integrated circuit component, the bent portion formed on the side surface of the metal shield case sandwiches an end portion of the circuit board, to which the clip lead terminal is attached, in a plane direction, and the clip lead terminal is attached. Since there is a gap between the end of the circuit board and the side surface of the shield case, the circuit board to which the clip leads are attached can be stored and fixed in the metal shield case with a simple structure. It is possible to prevent a short circuit between the metal shield case and the metal shield case.

In particular, this is due to the improvement of the structure of the metal shield case side, and since the circuit board is an ordinary rectangular board, it is possible to maintain high productivity of the circuit board to which the clip lead terminals are attached, and as a result Therefore, the integrated circuit component can be made highly productive.

[Brief description of drawings]

FIG. 1 (a) is an exploded perspective view of the integrated circuit component of the present invention, and FIG. 1 (b) is a bottom view of the integrated circuit component. FIG. 2 is an exploded perspective view of a conventional integrated circuit component. FIG. 3 is a sectional view of another conventional integrated circuit component. 10 …… Integrated circuit parts 1,51 …… Circuit board 2,52 …… Metal shield case 3,53 …… Clip lead terminal 17 …… Bent part

Claims (1)

[Scope of utility model registration request] 1. A predetermined circuit including an input / output pad is formed,
And an integrated circuit component in which a rectangular circuit board having clip lead terminals connected to input / output pads on one of its opposing ends is covered with a metal shield case having a rectangular opening. , The width between the facing ends of one of the openings of the metal shield case is larger than the width between the facing ends of the one of the circuit boards. By arranging the circuit board substantially in the center between the end portions, and by sandwiching the one opposing end portion of the circuit board by the bent portion that is bent from the side surface of the metal shield case to the inner side. An integrated circuit component characterized in that a gap is provided between one of the opposing ends of the circuit board to which the clip lead terminal is attached and the side surface of the shield case.