JPS60240185A - Electronic circuit device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to an electronic circuit device constituting general electronic equipment such as televisions and video tape recorders.

Conventional configurations and their problems In recent years, as the demand for electronic equipment to become ``lighter, thinner, and smaller'' has increased, how to increase the density of these electronic circuits has become an extremely important technical issue. .

Under these circumstances, various mounting techniques aiming at higher density electronic circuits have recently been studied, and new mounting forms for electronic circuits have been created.

In general, to increase the density of electronic circuits, the circuit elements that make up the electronic circuits are made smaller, and these circuit elements are integrated at a higher density to form circuits into functional blocks, creating modular functional circuit blocks. A mounting form is adopted in which electronic circuits are configured by interconnecting on a mother printed wiring board.

Various forms of this modularized circuit block have been used in the past, and as one form, we have used the circuit block shown in Figure 1 and the circuit block. An application has already been filed for an electronic circuit device as shown in FIG. The circuit block body shown in FIG. 1 is a circuit conductor layer 2 formed on a flexible wiring board 1.
A desired circuit block body is constructed by connecting a small circuit element 3 with a solder 4, and the external connection terminals 5 of this circuit block body are connected to a circuit provided on a mother printed wiring board 6 as shown in FIG. A high-density electronic circuit device is constructed by covering the upper surface of a circuit element 9 connected to the conductor layer 7 with a solder 8 and electrically connecting it to the circuit conductor layer 7 that requires connection.

However, in such electronic circuit devices, it is difficult to mount a circuit block body to cover the top surface of circuit elements that have been pre-mounted on the printed circuit conductor surface of the mother printed wiring board. Since the circuit block body made up of the wiring board is bent by the protrusions of the circuit elements mounted on the mother printed wiring board, the connection of the solder joints of the circuit elements mounted on the flexible wiring board becomes unstable. On the other hand, in this method of configuring an electronic circuit device, the external connection terminals configured on the flexible wiring board are positioned so as to cover the top surface of the circuit elements mounted on the mother printed wiring board. However, the process of soldering to the circuit conductor layer of the mother printed wiring board was extremely complicated, and there was a problem that mass production was somewhat lacking.

Purpose of the Invention The object of the present invention is to connect a circuit block body formed by mounting circuit elements on a flexible wiring board so as to cover the upper surface of the circuit elements mounted on the circuit conductor surface of the mother printed wiring board, and connect the external connection terminals to the circuit. An object of the present invention is to provide an electronic circuit device and a method for configuring the same, having a configuration such that the connection state of solder joints of circuit elements constituting a circuit block body is maintained stably when connected to a conductor layer.

Structure of the Invention The electronic circuit device according to the present invention connects external connection terminals of a small-scale circuit block formed by connecting small circuit elements to a flexible wiring board through a connector that is directly attached to the circuit conductor surface of a mother printed wiring board. electrically connected,
This makes it possible to realize an electronic circuit device in which the reliability of the solder joints of the circuit elements of the circuit block body is maintained well.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 3 is a perspective view of a small-scale circuit block according to an embodiment of the present invention, FIG. 4 is a perspective view of a mother printed wiring board for reprinting the small-scale circuit block of FIG. 3, and FIG. 1 is a sectional view of an electronic circuit device constructed by attaching a small-scale circuit block to a mother printed wiring board.

3 to 5, 10 is a flexible wiring board, 11 is a circuit conductor layer, 12 is a circuit element, 13 is a solder,
14 is an external connection terminal, 16 is a mother printed wiring board, 16
17 is a circuit conductor layer of the mother printed wiring board, 17 is a circuit element mounted on the mother printed wiring board, and 18 is a solder, one-piece flat connection type connector.

As shown in FIG. 3, the electronic circuit device of the present embodiment configured as described above first includes a flexible insulating film made of polyimide resin, modified epoxy resin, or the like, that is, a flexible insulating substrate. Using a so-called flexible wiring board in which a desired circuit conductor layer 11 is formed by etching a copper foil on the main surface of the flexible wiring board, all functional circuit blocks are constructed at predetermined positions on the circuit conductor layer surface of this flexible wiring board. As the circuit elements 12 necessary for the circuit conductor layer 11, micro-miniature, flat-connection type circuit elements such as resistors, capacitors, transistors, diodes, coils, volumetric devices, ICs, and LSIs are soldered using methods such as solder dipping and solder reflow methods. A small-scale circuit block was constructed by making fine connections using solder 13.

In this circuit block body, external connection terminals 14 are made of the same material as the circuit conductor layer 12 made of copper foil of the flexible wiring board and are drawn out from the end surface of the flexible wiring board 10 in the form of beam leads at regular intervals.

J-1-r 7-小ひ＾弥兟空 F-seise, right hand The wiring board 15 is an ordinary printed wiring board in which a desired circuit conductor layer 16 is formed by etching a copper foil on the main surface of an insulating board made of a hard board such as a paper-phenol board or a glass-epoxy board. Resistors, capacitors, coils, transistors, diodes, ICs, and LSIs on the circuit conductor layer.
Temporarily fix a planar connection type connector 19 on the same surface with a small planar connection type circuit element 17 using an adhesive or the like, and connect the circuit element 17 and the connector by a soldering method such as a solder dipping method or a solder reflow method. 19 and the circuit conductor layer 16 of the mother printed wiring board are connected by solder 18.

Here, the planar connection type connector 19 directly attached to the wiring circuit conductor surface 16 of the mother printed wiring board 15 is as shown in FIG.

Connecting conductor layers 21a are provided on one main surface of 20 at regular intervals.

21b, .
External connection conductor layers 22a, 22b'f are formed continuously on the leadless, planar connection type.

A plurality of these connectors are attached to the wiring circuit conductor surface of the mother printed wiring board depending on the configuration of the external connection terminals of the circuit block body to which connection is required.

In this case, what is important is that the thickness of the connector be equal to or greater than the thickness of the circuit elements mounted on the wiring circuit surface of the mother printed wiring board.

As shown in FIG. 5, this connects the external connection terminal 14 of the circuit block body to the connection conductor 21a of the connector.

21b with the solder 18, this is to avoid the influence of unevenness from the mother board on the circuit elements pre-mounted on the wiring circuit conductor surface 16 of the mother printed wiring board 15, and the flexible wiring constituting the circuit block body. This is to prevent the board from bending and to allow it to be mounted flat on the mother printed wiring board.

Note that in the above embodiment, the external connection terminal of the connector directly attached to the mother printed wiring board is configured only on one side wall of the insulating board, but in the present invention, the external connection terminal of the connector is There are no limitations on the shape or configuration of the terminal, as long as it can be connected to the circuit conductor layer of the mother printed wiring board in a two-dimensional manner.

Effects of the Invention As is clear from the above explanation, the electronic circuit device according to the present invention has the advantage of connecting external connection terminals of a small-scale circuit block formed by connecting small circuit elements to a flexible wiring board to a mother printed wiring board. The flexible wiring that makes up the circuit block is electrically connected to the mother printed wiring board by connecting it to a flat connection type connector that is mixed with other circuit elements and connected to the circuit conductor surface of the circuit block. The board is arranged parallel to the mother printed wiring board, so there is no danger of the solder joints of small circuit elements becoming loose due to bending of the flexible wiring board, and moreover, it is possible to The mounting on the mother printed wiring board is extremely easy, and the work efficiency can be improved, and the method of construction has great effects as well.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a circuit block body for configuring a conventional electronic circuit device, FIG. 2 is a sectional view of a conventional electronic circuit device, and FIG. 3 is a configuration of an electronic circuit device according to an embodiment of the present invention. 4 is a perspective view of a mother printed wiring board for configuring the device, FIG. 5 is a sectional view of the device, and FIG. 6 is a perspective view of a mother printed wiring board for configuring the device. FIG. 3 is a perspective view of the connector. 10... Flexible wiring board, 11...
...Circuit conductor layer, 12.17...Circuit element, 1
3.18...Solder, 14...External connection terminal, 16...Mother printed wiring board, 16.
...Circuit conductor layer of mother printed wiring board, 19...
...Connector, 20...Insulating board, 21a
, 21b... Connection conductor layer, 22a. 22b... Conductor layer for external connection. District 4 Figure 6 Procedural amendment November 28, 1988 Patent application No. 96868, 1988 2. Name of the invention Electronic circuit device 3. Relationship with the person making the amendment Patent application Address Kadoma, Osaka City Oaza Kadoma 1006 address name (
582) Matsushita Electric Industrial Co., Ltd. Representative Toshihiko Yamashita 4 Agent 571 Address 1006 Oaza Kadoma, Kadoma City, Osaka Prefecture 1-Sunsu located within Matsushita Electric Industrial Co., Ltd. 2. Scope of Claims (1) A planar connection type connector in which external connection terminals of a small-scale circuit block formed by connecting small circuit elements to a flexible wiring board are directly attached to the circuit conductor surface of a mother printed wiring board. An electronic circuit device characterized in that it is electrically connected through a wire. A flat connection type circuit element is mounted on the circuit conductor surface of the mother printed wiring board, a flat connection type connector is directly attached on the same surface as the circuit element, and f'er-? 7. The electronic circuit device according to claim 1, wherein the external connection terminals of the small-scale circuit block are electrically connected through a terminal 72. road device. An electronic circuit device according to claim 1, which defines:

Claims (2)

[Claims] (1) The external connection terminals of a small-scale circuit block constructed by connecting small circuit elements to a flexible wiring board are electrically connected via a flat connection type connector attached directly to the circuit conductor surface of the mother printed wiring board. An electronic circuit device characterized by: (2) A flat connection type circuit element is mounted on the circuit conductor surface of the mother printed wiring board, a flat connection type connector is directly attached on the same surface as the circuit element, and a small scale circuit block is connected through the connector. The electronic circuit device 0 described in the so-called patented item 1, characterized in that the external connection terminals are electrically connected to each other.