JPH08148769A - Printed circuit board for a plurality of circuit boards and inspection of the same circuit board - Google Patents

Abstract

PURPOSE: To execute the inspection equivalent to that of each circuit board without setting ID in unit of the corresponding circuit board region only by connecting an interface cable to only one place of the circuit board region of the printed circuit board for a plurality of circuit board. CONSTITUTION: An internal bus 16 for connecting in common the CPUs 14-1 to 14-3 and connectors 17-1 to 17-3, etc., in the circuit devices 15-1 to 15-1 provided in each circuit board regions 12-1 to 12-3 is wired over the regions 12-1 to 12-3 in the substrate 11 which becomes the base of the printed circuit board 10 for a plurality of circuit boards and the ID setting lines 19-1 to 19-2 for setting the signal lines ID1, ID0, for example, of the ID switches 13-1 to 13-2 to the GND level is wired over the adjacent regions 12-2, 12-3. Moreover, the inspection is performed in unit of the circuit board regions 12-1 to 12-3 under the condition that an inspecting apparatus is connected only to the connector 17-1, for example, through the interface cable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit for a plurality of circuit boards, in which a plurality of circuit devices of the same type are provided on one board and a plurality of circuit boards of the same type can be obtained by cutting the boards. The present invention relates to an inspection method for a board and the circuit board.

[0002]

2. Description of the Related Art In a recent circuit board manufacturing process using a printed wiring technique, a plurality of circuit boards can be taken from one board. That is, in the process of manufacturing a circuit board, one base substrate is divided into a plurality of circuit board areas, and the circuit devices of the same type are provided in each of the circuit board areas. A printed circuit board for a board is manufactured. Then, a plurality of circuit boards are obtained by cutting the printed circuit board for a plurality of circuit boards in each circuit board region unit.

FIG. 3 shows a schematic structure of such a printed circuit board for a plurality of circuit boards. In FIG.
The substrate 31 that forms the base of the printed circuit board 30 for a plurality of circuit boards is divided into, for example, three circuit board regions 32-1 to 32-3.

In each of the circuit board areas 32-1 to 32-3, for example, an arbitrary ID (identifier) having a 3-bit structure can be set.
D switch units 33-1 to 33-3 and CPUs 34-1 to 34-3
35-1 to 35-3 including the circuit device 35-1 and 35-3
Internal bus 36-1 to 36-3 including a power supply line, which are connected to CPUs 34-1 to 34-3 in CPU 35-1 to 35-3, internal bus 36-1 to 36-3 and an external interface cable (Fig. (Not shown), and a set of connector parts 37-1 to 37-3 for connecting with (not shown) is provided. ID switch section 33-1 to 33-3
Has three signal lines (ID signal lines) ID2, ID1, and ID0 that are pulled up via resistors R, respectively.

Now, when the printed circuit board 30 for a plurality of circuit boards as shown in FIG. 3 is manufactured, the printed circuit board 30 is cut into each of the circuit board regions 32-1 to 32-3, As shown in FIG. 4, three circuit boards 38-1
~ 38-3 can be obtained.

Here, in order to inspect the circuit boards 38-1 to 38-3, as shown in FIG. 4, the inspection device 40 is connected to the connector portion 37 of the circuit boards 38-1 to 38-3 by the interface cable 41. -1 to 37-3, respectively.

Further, the ID switch sections 33-1 to 33-3 of the circuit boards 38-1 to 38-3 have different IDs.
Set. Normally, the ID switch units 33-1 to 33-3 are I
It has a pin (for external connection) connected to the D signal lines ID2 to ID0, and this pin is not shown in GND.
A logic "1" (negative logic) can be set by connecting and using a jumper plug or the like to the pin (ground pin). Since the ID signal line corresponding to the unoperated pin is pulled up and is in an open state, it is set to logic “0” (negative logic). This ID signal line ID2 to ID0 state (open / GND) and ID
The relationship with the (setting ID value) is shown in FIG.

The inspection device 40 is connected to the connector portion 3 of the circuit boards 38-1 to 38-3 by the interface cable 41.
When the inspection apparatus 40 is connected to 7-1 to 37-3 and turned on, the circuit boards 38-1 to 38-3 are also supplied with power.

CPU 34-1 of circuit boards 38-1 to 38-3
34-3 are ID switch units 33-1 to 3 immediately after the power is turned on.
Read the ID set in 33-3. On the other hand, the inspection device 40 selects one of the circuit boards 38-1 to 38-3, and uses the setting information of the ID switch section of the board to execute the test (inspection) on the selected board. Match I
An instruction is issued to the interface cable 41 using D. This instruction is issued via the connector parts 37-1 to 37-3 of the respective circuit boards 38-1 to 38-3 and the internal buses 36-1 to 36-3 to C
Received at PUs 34-1 to 34-3.

When receiving the instruction from the inspection device 40, the CPU 34-i (i = 1 to 3) is instructed only in the case of the instruction for the ID (own ID) set in the ID switch section 33-i. The inspection device 4
Return to 0.

The inspection device 40 uses the selected circuit board,
The board is inspected by receiving the execution result of the instruction given to the board. The inspection device 40 performs the above inspection on all the circuit boards 38-1 while switching the IDs.
~ 38-3 is executed.

[0012]

As described above, in a circuit board manufacturing process in which a plurality of circuit boards of the same type can be taken from one printed circuit board for a plurality of circuit boards, conventionally, a printed circuit board for a plurality of circuit boards has been conventionally used. After the circuit board is separated into a plurality of circuit boards, an interface cable is connected to each of the circuit boards and an ID is set for each circuit board to perform a board inspection.

However, it is troublesome to connect an interface cable to each circuit board or to operate the ID switch unit for each circuit board to set an ID for board inspection, resulting in poor inspection efficiency. There was a problem. Furthermore,
After the inspection was completed, it was necessary to disconnect all the connection between each circuit board and the interface cable and return the ID switch section of each circuit board to the unoperated state.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a circuit board manufacturing process in which a plurality of circuit boards of the same type can be obtained from one printed circuit board for a plurality of circuit boards. By providing the circuit board with inspection wiring that is cut by disconnecting it to the circuit board, just connect the interface cable to one of the corresponding circuit board areas before disconnecting the circuit board. Provides a printed circuit board for a plurality of circuit boards and an inspection method of the same circuit board, which can perform an inspection equivalent to the inspection of each circuit board without having to set an ID (identification information) for each corresponding circuit board area. To do.

[0015]

According to the present invention, one board is divided into n circuit board areas, and arbitrary m-bit identification information can be set and operated in each circuit board area. A switch unit and a circuit device selected and designated from the outside by identification information that matches the setting information of the switch unit;
Regarding a printed circuit board for a plurality of circuit boards provided with a circuit board element group including a connector section for connecting the circuit device to an external interface line, the circuit board area is provided at a stage before cutting the circuit board area in units. In order to inspect each unit, the internal interface line commonly connected to each connector portion is wired across each circuit board area at the time of printed wiring, and at least n- of the n circuit board areas are connected. An identification information setting line for setting different fixed identification information to each of the switch portions of the n circuit board areas is wired to each of the one circuit board area across adjacent circuit board areas, and at the time of inspection,
A test device is connected to any one of the connector parts of each circuit board region via an interface cable, and the corresponding circuit device is identified by identification information that matches the setting information of the switch part of each circuit board region from the test device. It is characterized in that the inspection is performed for each circuit board area unit by sequentially specifying.

Further, in the present invention, assuming that the switch section has m signal lines which are set to the first logical value in the unoperated state, at least one of the m signal lines is provided. The book is forcibly set to a second logical value different from the first logical value by wiring of the identification information setting line.

[0017]

In the above structure, since the internal interface line commonly connected to the connector portion of each circuit board area is wired, any one of the connectors can be provided at the stage before disconnection to the circuit board. Only by connecting the inspection device to the unit via an external interface line (interface cable), it is possible to perform inspection in units of circuit board regions corresponding to each circuit board.

Further, in the above configuration, in order to set different fixed identification information to each of at least n-1 of the n circuit board areas, the switch section of the n circuit board areas is set. The identification information setting line of is wired. With this identification information setting line, at least one of the m signal lines (the signal line indicating the m-bit identification information) of the switch section in the corresponding circuit board area is in the unoperated state. Nevertheless, the second logical value different from the original first logical value is forcibly set. Therefore, the identification information unique to each switch unit is set without operating the switch unit in each circuit board area, that is, even when the switch unit is not operated.

Further, since the internal interface line and the identification information setting line are laid across the adjacent circuit board area, when the connection to the circuit board is performed, these lines are also cut and opened. Since it has no meaning, it will not affect the product.

[0020]

1 is a diagram showing a schematic structure of a printed circuit board for a plurality of circuit boards according to an embodiment of the present invention. In FIG. 1, 10 is a printed circuit board for a plurality of circuit boards. The substrate 11 that forms the base of the printed circuit board 10 is, for example, 3
It is divided into two circuit board regions 12-1 to 12-3.

In each of the circuit board areas 12-1 to 12-3, for example, an ID (identifier) having a 3-bit structure can be set.
D switch units 13-1 to 13-3 and CPUs 14-1 to 14-3
And a connector unit 17-1 to 17-3 for connecting to an external interface cable (not shown) including a power supply line.
The ID switch units 13-1 to 13-3 have three signal lines (ID signal lines) ID formed by the print pattern.
2, ID1 and ID0 respectively. The ID signal lines ID2, ID1, and ID0 are pulled up via the resistors R, respectively, and are logic "0" when the corresponding ID switch unit 13-i (i = 1 to 3) is not operated.
It is set to (negative logic).

The circuit board regions 12-1 to 12-1 are provided on the substrate 11.
CP in the circuit devices 15-1 to 15-1 provided in 2-3
An internal bus 16 for connecting the U 14-1 to 14-3 and the connector parts 17-1 to 17-3 in common is wired. The internal bus 16 is formed across the circuit board regions 12-1 to 12-3 by a print pattern.

Further, in at least two circuit board areas of the respective circuit board areas 12-1 to 12-3, for example, the circuit board areas 12-1 and 12-2, the respective ID switch parts 13-1 to 13 are provided.
ID setting lines 19-1 and 19-2 for setting different fixed IDs to -3 are laid across the adjacent circuit board regions 12-2 and 12-3 by a print pattern.

In this embodiment, the ID setting line 19-1
Has one end connected to at least one of the three ID signal lines ID2 to ID0 of the ID switch unit 13-1, for example line ID1, and the other end to GND (ground) in the adjacent circuit board region 12-2. Connected to the level. As a result, the line ID 1 of the ID switch unit 13-1
In the unoperated state of the ID switch unit 13-1,
It is forcibly set to the GND level, that is, the logic "1" (negative logic). In this case, the line I of the ID switch unit 13-1
D2, ID1, and ID0 are “open”, “GND”, and “op”.
Since it is "en"("010"), the set ID value of the ID switch unit 13-1 is "2" as is apparent from FIG.

Similarly, one end of the ID setting line 19-2 is
Three ID signal lines ID2 to ID2 of the ID switch unit 13-2
At least one line of ID0, for example line ID
0 and the other end is connected to the GND (ground) level in the adjacent circuit board region 12-3. As a result, the line ID 0 of the ID switch unit 13-2 becomes
When the switch unit 13-2 is not operated, it is forcibly set to the GND level, that is, the logic "1" (negative logic).
In this case, the line ID2 and ID of the ID switch unit 13-2
1, ID0 are “open”, “open”, “GND” (“0
01 "), the set ID value of the ID switch unit 13-2 becomes" 1 "as is apparent from FIG.

The ID switch section 13-3 is not connected with ID setting lines corresponding to the ID setting lines 19-1 and 19-2. For this reason, the lines ID2, ID1, and ID0 of the ID switch unit 13-3 are
In the unoperated state of 3-3, all are "open"("00
Since it is "0"), the set ID value of the ID switch unit 13-2 is "0".

As described above, in this embodiment, the ID switch section 1 is connected by the wiring of the ID setting lines 19-1 and 19-2.
3-1 and 13-2 have the ID switch unit 13 in the unoperated state.
-3, a unique ID value "2" different from the ID value "0",
“1” is fixedly set.

In this embodiment, when the printed circuit board 10 for a plurality of circuit boards shown in FIG. 1 is manufactured, the printed circuit board 10 is cut in the circuit board regions 12-1 to 12-3 as a unit. Prior to obtaining the three circuit boards, the printed circuit board 10 is inspected in the circuit board regions 12-1 to 12-3 as a unit as described below.

In order to perform an inspection in units of the circuit board regions 12-1 to 12-3, the inspection device 20 is connected to the circuit board region 12-1 by an interface cable 21 as shown in FIG.
To 12-3, for example, the connector portion 17-1 of the circuit board region 12-1.

Here, the other circuit board regions 12-2, 12-3
The connector parts 17-2 and 17-3 of the circuit board area 12-1 to
12-3 is connected to the connector section 17-1 by the internal bus 16 wired across 12-3.
It is not necessary to connect the interface cable 21 to 7-2 and 17-3. The internal bus 16 functions as a kind of internal interface line. The interface cable 21 may be connected to the connector portion 17-2 or the connector portion 17-3 instead of the connector portion 17-1.

The IDs of the circuit board areas 12-1 and 12-2
As described above, the switch sections 13-1 and 13-2 are in an unoperated state by the ID setting lines 19-1 and 19-2 wired across the adjacent circuit board regions 12-2 and 12-3. Circuit board area 12-3 in the same unoperated state
Different from the set ID value “0” of the ID switch unit 13-3 of
Unique ID values "2" and "1" different from each other are set. Therefore, it is not necessary to operate the ID switch units 13-1 to 13-3 to set unique ID values.

The inspection device 20 is connected to the connector portion 17-1 of the circuit board area 12-1 by the interface cable 21.
When the inspection device 20 is turned on by connecting with, the internal bus 16 also supplies power to the circuit devices 15-1 to 15-3 in the circuit board regions 12-1 to 12-3.

CPU 14-1 of circuit devices 15-1 to 15-3
The ID switch section 13-1 to 14-3 immediately after the power is turned on.
Read the ID set in 13-3. On the other hand, the inspection device 20 selects one of the circuit board regions 12-1 to 12-2 (inside circuit devices 15-1 to 15-3), and selects it in the selected circuit board region (inside circuit device). In order to execute a test (inspection), an instruction is issued to the interface cable 21 by using an ID that matches the setting information of the ID switch unit in the circuit board area. The instruction is an internal bus (as an internal interface line) wired across the connector portion 17-1 of the circuit board area 12-1 to which the interface cable 21 is connected and the circuit board areas 12-1 to 12-3. CP of the circuit board areas 12-1 to 12-3 via 16
Received at U14-1 to U14-3.

When the CPU 14-i (i = 1 to 3) receives an instruction from the inspection device 20, the CPU 14-i is instructed only in the case of an instruction for the ID (own ID) set in the ID switch section 13-i. The inspection device 2
Output to the internal bus 16 addressed to 0. This internal bus 16
The execution result above is the connector section 1 of the ID switch section 13-1.
It is sent to the inspection device 20 via the 7-1 and the interface cable 21.

The inspection device 20 has the selected circuit board area 1
By receiving the execution result for the instruction given to (the circuit device 15-i of) the area 12-i returned from the CPU 14-i of 2-i, the area 12-i (the circuit device 15-i of the area) is received.
Conduct an inspection.

The inspection device 20 executes the above inspection on all the circuit board areas 12-1 to 12-3 (the circuit devices 15-1 to 15-3 thereof) while switching the IDs. Now, when all the inspections are completed, the connection between the interface cable 21 and the connector section 17-1 is released. Other connector part 1
Since the connection between 7-2 and 17-2 and the interface cable 21 is not required, the connection can be released only at one place of the connector portion 17-1 as described above.

After that, the printed circuit board 10 is cut into each of the circuit board regions 12-1 to 12-3 as a unit to obtain three circuit boards. At this time, the internal bus 16 is separated into three bus portions at the boundaries of the circuit board regions 12-1 to 12-3. As a result, these three bus parts are connected to the internal buses 36-1 to 36 of FIG. 4 in the circuit board regions 12-1 to 12-3.
Functions as an internal bus equivalent to -3.

When the printed circuit board 10 is cut in units of the circuit board areas 12-1 to 12-3, the ID setting line 19-1 is the boundary between the circuit board areas 12-1 and 12-2 and the ID setting is made. The line 19-2 is separated at the boundary between the circuit board regions 12-2 and 12-3. Then, the ID setting line 1
9-1, 19-2 connected to the ID switch unit 13-1,
The ID signal lines ID1 and ID0 of 13-2 return from the "GND" state to the "open" state. As a result, not only the ID switch unit 13-3 but also the ID switch units 13-1 and 13-2 have their set ID values set to "0" in the unoperated state.

In the above embodiment, the circuit board area 12
The case where the ID setting line is not wired to -3 has been described, but by wiring the ID setting line also to the area 12-3, the ID switch unit 13-3 can be set to a value other than "0" in the unoperated state. Moreover, an ID value different from the set ID values of the ID switch units 13-1 and 13-2 may be set. This ID setting line is used for the adjacent circuit board area 12
-Need to wire across -2.

[0040]

As described above in detail, according to the present invention, the printed circuit board for a plurality of circuit boards is provided with the inspection wiring (internal interface line and identification information setting line) so that the circuit board can be separated. At the previous stage, by simply connecting the interface cable to one of the corresponding circuit board areas, the inspection equivalent to the inspection of each circuit board can be performed by checking the ID (identification information) for each corresponding circuit board area. It can be done without any settings. Therefore, it is possible to save the trouble of connecting an interface cable to each of the separated circuit boards and setting an ID for each circuit board, which has been a conventional problem. Moreover, the above-mentioned wiring for inspection is cut and opened by disconnection to the circuit board and becomes meaningless, so that it does not affect the product.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic structure of a printed circuit board for multiple circuit boards according to an embodiment of the present invention.

FIG. 2 is a diagram showing a connection form with an inspection device when inspecting the printed circuit board of FIG. 1 at a stage before being cut off to a circuit board in the embodiment.

FIG. 3 is a diagram showing a schematic structure of a conventional printed circuit board for multiple circuit boards.

4 is a diagram showing a connection form with an inspection device when inspecting a plurality of circuit boards separated from the printed circuit board of FIG.

FIG. 5 is a diagram showing the relationship between the state (open / GND) of three ID signal lines ID2 to ID0 and ID.

[Explanation of symbols]

10 ... Printed circuit board for multiple circuit boards, 11 ... Board, 1
2-1 to 12-3 ... Circuit board area, 13-1 to 13-3 ... ID switch section (identification information setting switch section), 14-1 to 14-3
... CPU, 15-1 to 15-3 ... Circuit device, 16 ... Internal bus (internal interface line), 17-1 to 17-3 ... Connector section, 19-1, 19-2 ... ID setting line (identification information setting) Line), ID2 to ID0 ... ID signal line, 20 ...
Inspection device, 21 ... Interface cable (external interface line).

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location H05K 3/00 P

Claims (4)

[Claims] 1. A single board is divided into n circuit board areas, and an identification information setting switch section capable of setting and operating arbitrary m-bit identification information for each circuit board area, and this switch section. A printed circuit board for a plurality of circuit boards provided with a circuit board element group that includes a circuit device that is externally selected and designated by identification information that matches the setting information, and a connector portion that connects the circuit device to an external interface line. In the printed circuit board for a plurality of circuit boards, in which a plurality of circuit boards of the same type can be obtained by cutting the printed circuit board in units of the circuit board area, the printed circuit board is wired over the n circuit board areas. And
At least n− for setting different fixed identification information to the internal interface lines commonly connected to the respective connector parts and the switch parts of the n circuit board regions.
A printed circuit board for a plurality of circuit boards, characterized in that each of the one circuit board areas is provided with an identification information setting line wired across adjacent circuit board areas. 2. The switch section has m signal lines that are set to a first logical value in an unoperated state, and at least one of the m signal lines is
2. The printed circuit board for a plurality of circuit boards according to claim 1, wherein a wiring of the identification information setting line is forcibly set to a second logical value different from the first logical value. 3. A single board is divided into n circuit board areas, and an identification information setting switch section in which arbitrary m-bit identification information can be set and operated for each circuit board area, and this switch section A printed circuit board for a plurality of circuit boards provided with a circuit board element group that includes a circuit device that is externally selected and designated by identification information that matches the setting information, and a connector portion that connects the circuit device to an external interface line. A printed circuit board for a plurality of circuit boards, in which a plurality of circuit boards of the same type can be obtained by cutting the printed circuit board in the circuit board area unit, is inspected in the circuit board area unit before the cutting. In order to achieve this, at the time of printed wiring, the internal interface line commonly connected to each of the connector portions is wired across each of the circuit board regions, and Circuit board areas adjacent to each of at least n-1 of the circuit board areas are provided with identification information setting lines for setting different fixed identification information to the switch portions of the n circuit board areas. Wiring over, and at the time of inspection, connect the inspection device to any one of the plurality of connector parts via an interface cable,
A plurality of circuit board regions are inspected by sequentially designating corresponding circuit devices from the inspection device by the identification information that matches the setting information of the switch section of each circuit board region. Inspection method of printed circuit board for circuit board. 4. The switch section has m signal lines that are set to a first logical value in an unoperated state, and at least one of the m signal lines is
4. The method for inspecting a printed circuit board for a plurality of circuit boards according to claim 3, wherein the wiring of the identification information setting line forcibly sets a second logical value different from the first logical value.