JPS62115886A - Electronic circuit board - 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 board used in various electronic devices, and more specifically, to an electronic circuit board having a large number of electronic components mounted thereon. It is.

(Prior Art) This type of conventional electronic circuit board will be explained with reference to FIG. The figure shows an electronic circuit board with a simple configuration.
On a printed wiring board 2 on which a circuit conductor layer 1 is formed, a chip type transistor 3, a flat package IC 4, a chip type capacitor 5, a chip type resistor 6 for function modification, a chip type resistor 7, a discrete IC 8 with leads, and a leaded discrete IC 8 are disposed. Electronic components such as capacitors 9 are attached to predetermined terminals of the circuit conductor layer 1 by soldering or other connecting means. In addition, input/output signals and a power source of the electronic circuit board are connected to an external circuit through the connection electrode 10.

(Problems to be Solved by the Invention) However, in the above configuration, even if the entire electronic circuit is divided into two electronic circuit blocks A and B, the entire electronic circuit is connected by the circuit conductor layer 1. There was a problem in that if there was an abnormality in one circuit part, the electronic circuit board would be defective.

Also, even if you try to test the connection status of each electronic component 3 to 9, or perform an operation test or function modification of each electronic circuit block A and B, all electronic components 3 to 9 and two Since the electronic circuit blocks A and B are connected to each other, it is extremely difficult to perform operational tests and functional corrections, and even if an abnormality is found, it is extremely difficult to repair it.

In particular, as the scale of the circuit increases, the difficulty increases and the yield drops significantly, which is an extremely serious problem.

The present invention solves the above problems and provides an electronic circuit board that allows easy testing of the connection state of each electronic component, operation test of each electronic circuit block, and functional modification.

(Means for Solving the Problems) In order to solve the above problems, the present invention separates an electronic circuit board into a plurality of electronic circuit blocks, and makes it possible to test and modify the functions of each electronic circuit block. This is due to

(Function) With the above configuration, it becomes easy to test and modify the functions of each electronic circuit block, and it is possible to obtain a high-yield electronic circuit board in which only defective electronic circuit blocks need to be replaced. It will be done.

(Example) A first example of the present invention will be described with reference to FIGS. 1 and 2, and a second example will be described with reference to FIG. 3.

FIG. 1 is a perspective view of an electronic circuit board according to a first embodiment of the present invention, which has the same circuit configuration as the conventional example shown in FIG. do.

The electronic circuit board is divided into two electronic circuit blocks A and B, and the circuit conductor layer 1 that connects the electronic components is cut to form three types of connection terminals 11 to 13.

Note that the connection terminal 11 is connected to the electronic circuit block inner terminal 11a of the separated electronic circuit block A, and to the first electronic component that does not belong to each electronic circuit block A and B in the electronic circuit board.
In the figure, a terminal 1 in an electronic circuit board is connected to a leaded capacitor 9 or a connecting terminal 10 connected to an external circuit.
1b. The connection terminal 12 is connected to the internal electronic circuit block terminals 12a of the adjacent electronic circuit blocks A and B.
and 12b are directly connected to each other, and there are three locations in FIG.

The connection terminals 13 are connected to adjacent electronic circuit blocks A and B.
Terminals 13a and 13 in each electronic circuit block of
b and an internal circuit board terminal L3c which is connected to a leaded capacitor 9 that does not belong to each electronic circuit block A or B within the electronic circuit board.

Each electronic component 3 to 9 has a connecting terminal 11 .
It is attached to a predetermined terminal of a printed wiring board 2 on which a circuit conductor layer 1 having 12 and 13 is formed. Since the electronic circuit board is separated into electronic circuit blocks A and B, the connection state, operation test, and function modification of each electronic component can be easily and accurately performed.

In this embodiment, after testing the connection state of each electronic component 3 to 9 and confirming that there is no abnormality in the connection, the terminals in the electronic circuit block of each independent electronic circuit block A and B are
1b, 12a and 13a, and 11b.

12b, 13b and the connection electrode 10, respectively, and conduct an operation test. Depending on the circuit configuration, the function may be changed by changing the resistance value of the chip-type resistor 6 for function modification using a laser beam or the like. Fix it. After confirming that all electronic circuit blocks A and B operate normally, connect each connection terminal 11.1 as shown in FIG.
2 and 13 were connected by a jumper element 14, and the circuit conductor layer 1 of the divided electronic circuit board was connected.

In this embodiment, a metal wire was used for the jumper element 14, and the jumper element 14 was connected to each connection terminal 11, 12, and 13 by soldering, thermocompression bonding, or the like.

Next, a second embodiment of the present invention will be described with reference to FIG. Since the second embodiment is an electronic circuit board having the same configuration as the first embodiment, the same symbols will be used for the same components and the explanation thereof will be omitted.

In the figure, the periphery of one of the electronic circuit blocks A and B, which are separated into a plurality of electronic circuit blocks, two electronic circuit blocks A and B provided on an electronic circuit board in the second embodiment, is a perforated hole 15. surrounded by In addition, there are 3 electronic circuit blocks.
If the electronic circuit block is divided into two or more electronic circuit blocks, perforations may be provided around two or more or all of the electronic circuit blocks.

For each divided electronic circuit block, each electronic component 3
9 to 9, and functional corrections as necessary. If a connection failure or malfunction is found as a result, the corresponding electronic circuit block, for example, the second implementation shown in FIG. In the example, after removing the electronic circuit block A at the perforated hole 15 and replacing it with a normal electronic block prepared in advance, the connecting terminal 11.12 is removed.
and 13 are connected.

With this configuration, each of the electronic circuit blocks A and B not only allows connection tests, operation tests, and function corrections of the electronic components 3 to 9 to be carried out with high precision, but also enables replacement of abnormal electronic circuit blocks. Become.

In the two embodiments described below, the same printed wiring board 2 is used.
The electronic circuit configured above was separated into multiple electronic circuit blocks, but if each electronic circuit block was divided into independent functional circuit blocks, the number of input and output terminals would be reduced, and other electronic circuit blocks could be separated. Not only is it easier to connect to circuit blocks, but the accuracy of testing and functional modification is further improved, and it is also easier to implement.

(Effects of the Invention) As explained above, according to the present invention, connection tests, operation tests, or function corrections of electronic components mounted on an electronic circuit board can be easily and accurately carried out. The effect is remarkable on large-scale circuit boards, and by making it possible to replace abnormal electronic circuit blocks, it has the effect of significantly improving production yields.

[Brief explanation of drawings]

1, 2, and 3 are perspective views of first and second embodiments of electronic circuit boards according to the present invention, respectively, and FIG. 4 is a perspective view of a conventional electronic circuit board. 1...Circuit conductor layer, 2...Printed wiring board, 3
...Chip type transistor, 4...Flat package IC15...Chip type capacitor, 6
...Chip type resistor for function modification, 7...Chip type resistor, 8...Discrete IC with lead
19... Capacitor with lead, 10... Connection electrode, 11.12, 13... Connection terminal, 1. la, 1
2a, 12b, 13a. 13b...Electronic circuit block internal terminal, llb. 13c...Electronic circuit board internal terminal, A, B...Electronic circuit block. Patent applicant Matsushita Electric Industrial Co., Ltd. Figure 1 3... ket.1. De-type transition matari llb, 1
3C"e4n) Kyunai Dai et al. j4...Flat) l'jy Bouji ICA, B...Crush) X!115@, Pro, Af5
...Kedji Ru Conte Success. 6...1 review pi and 1! Go η〕U1゛q3A! 7
°° Keffen 8... Richijiya prostitute U9 doo IC 9... Lee Hakumura Condensed 10...) Kibet 9 Shot! ++, 12.13...

Claims (5)

[Claims] (1) An electronic circuit board characterized in that an electronic circuit configured on the same substrate is divided into a plurality of electronic circuit blocks, and connecting terminals for output and power supply are provided in each electronic circuit block. (2) A patent claim characterized in that a predetermined circuit is constructed by connecting the connection terminals provided in each electronic circuit block after conducting a connection test, an operation test, and functional correction as necessary for the installed electronic components. The electronic circuit board according to item (1). (3) The electronic circuit board according to claim (1), wherein the circuit board around one or more of the divided electronic circuit blocks is surrounded by perforated holes. (4) After removing the abnormal electronic circuit block found during connection tests, operation tests, and functional corrections as necessary for the installed electronic components at the perforated hole and replacing it with a normal electronic circuit block. , the electronic circuit board according to claim 3, wherein a predetermined circuit is constructed by connecting connection terminals provided on each electronic circuit block. (5) The electronic circuit block divided into a plurality of parts is composed of electronic circuit blocks each having an independent function.
The electronic circuit board according to item 2), item (3), or item (4).