JP2003110300A - Printed circuit board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printed circuit board which enables accurate detailed history management. SOLUTION: The printed circuit board is mounted with a history managing circuit 20 which is independent of a basic circuit 11 having original functions in addition to the basic circuit 11. The history managing circuit 20 is composed of a microprocessor, etc., stores manufacture history information and fault repair information supplied from a history managing device through a connector 29 in a PROM 25, and also stores information on an operation state outputted from the basic circuit 11 during operation. Consequently, information on the manufacture history and operation state can be read out by connecting the printed circuit board to the history managing device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board in which components are mounted on a printed wiring board, and more particularly to history management thereof.

[0002]

2. Description of the Related Art A printed circuit board having electronic components mounted on a printed wiring board includes a built-in type which is housed in an outer casing of a device such as a mobile phone or a VCR.
There are two types of individual products such as function addition boards for personal computers and additional circuit boards for exchanges.

The built-in type printed circuit board is a component of the apparatus, the printed circuit board of a single product is the board itself, and its manufacturing history is managed by the factory. The manufacturing history is
An individual number for identification is given to the printed circuit board, and the data in each manufacturing process is input to each individual number in a personal computer for history management for management.

The manufacturing history of the device and the printed circuit board is utilized for dealing with complaints and services in the market. For example, when the shipped device or printed circuit board has a defect, the device or printed circuit board is returned to the factory for repair. Therefore, the manufacturing history managed by the personal computer is examined and used as a reference for repair. Further, in addition to the manufacturing history, information on breakdowns and repair contents is added, and the history is comprehensively managed, which can be utilized as know-how in future product development.

[0005]

However, the conventional printed circuit board history management has the following problems. Since the manufacturing history data of the printed circuit board is manually input, an input error is likely to occur.

The content of the manufacturing history data mainly depends on the quality of the inspection result in each process, and the history of component replacement due to design changes that occur during the process may be separately managed. Therefore, it is difficult to unify the history management data.

When the manufacturing process is spread over a plurality of companies, only the final shipping inspection data is often left as the manufacturing history data.

When a specific design change, such as a constant change of a resistor, is made to each manufacturing lot, the products of each lot are mixed in the manufacturing process. Therefore, it is easy to find the applicable lot. This was a work and sometimes required a huge number of man-hours.

Management of the printed circuit board after shipment to the user side is impossible, and the period from shipment to actual operation cannot be determined from the repair request product. For example,
If the product was shipped in February and started operating in October and a problem occurs in December, the manufacturer assumes that it has been operating for 10 months. For this reason, it is necessary to ask the user for the operating status, but it is not always possible to obtain accurate information.

The present invention solves the problems of the prior art by adding a circuit for history management to each printed circuit board, and provides a printed circuit board capable of accurate and detailed history management. Is.

[0011]

In order to solve the above-mentioned problems, a first invention of the present invention is to provide a printed circuit board on which components of a circuit board for performing a predetermined function are mounted on a printed wiring board. A history management circuit is provided for storing, in a nonvolatile memory, manufacturing history information and failure repair information provided from the outside, and operation state information output from the base circuit.

A second invention has a connector for inputting the manufacturing history information and the failure repair information from the outside and outputting the information stored in the non-volatile memory to the history management circuit in the first invention. It is configured.

According to a third aspect of the present invention, the history management circuit according to the first aspect of the present invention uses a land pattern for inputting manufacturing history information and failure repair information from the outside and outputting information stored in a non-volatile memory to the outside. It is configured to have terminals.

According to a fourth aspect of the present invention, the history management circuit according to the first aspect of the present invention is a radio transmission / reception unit for inputting manufacturing history information and failure repair information from the outside and outputting information stored in a non-volatile memory to the outside. Is configured to have.

According to a fifth aspect of the invention, the history management circuit according to the second to fourth aspects of the invention is configured to receive a signal indicating the operating state of the base circuit via a photocoupler.

According to the first to fifth inventions, since the printed circuit board is constructed as described above, the following operations are performed. The manufacturing history information, failure repair information, and operating status information of the printed circuit board are stored in the non-volatile memory of the history management circuit provided separately from the board circuit that performs the predetermined function of this printed circuit board. It The contents of this non-volatile memory are read and written via a connector, a terminal with a land pattern, or a wireless transceiver.

According to a sixth aspect of the present invention, in addition to the fourth aspect, a transmitter for wirelessly outputting information on the operating state of the base circuit is provided, and the history management circuit is provided with manufacturing history information and a failure repair wirelessly provided from the outside. The wireless transmission / reception unit is provided for inputting the information and the information on the operating state of the base circuit provided from the transmission unit, and for outputting the information stored in the nonvolatile memory to the outside.

According to the sixth invention, the following operation is performed. In the history management circuit, input / output of manufacturing history information, failure repair information and operating state information of the base circuit, which are given from the outside, are all performed wirelessly via the transmission / reception unit.

According to a seventh aspect of the present invention, in a printed circuit board on which components of a base circuit that perform a predetermined function are mounted on a printed wiring board, manufacturing history information and failure repair information given from the outside and the output from the base circuit. A connector is provided for detachably mounting a history management circuit board that stores operating state information in a non-volatile memory.

According to an eighth aspect of the present invention, the history management circuit board according to the seventh aspect is wirelessly transmitted / received for inputting manufacturing history information and failure repair information from the outside and outputting information stored in a non-volatile memory to the outside. It is configured to have parts.

According to the seventh and eighth aspects of the invention, the following operations are performed. The manufacturing history information of the printed circuit board, failure repair information, and information on the operating state of the circuit board are stored in the nonvolatile memory of the history management circuit board mounted on the connector of the printed circuit board. The contents of the non-volatile memory are read and additionally written, for example, by removing the history management circuit board from the printed circuit board and inserting it into the connector of the history management device.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) FIG.
(B) is a block diagram of a printed circuit board showing the first embodiment of the present invention, (a) is a block diagram and (b) is a plan view.

This printed circuit board comprises a board circuit 11, a power supply circuit 12 and a history management circuit 20 on a printed wiring board.
It is equipped with. The base circuit 11 is a circuit on which components for performing a predetermined function of the printed circuit board are mounted, and the power supply circuit 12 includes the base circuit 11 and the history management circuit 20.
It supplies the necessary power to The base circuit 11 and the power supply circuit 12 are connected to the outside via a connector 13. The history management circuit 20 stores and holds manufacturing history information and failure repair information given from the outside, and operation state information output from the base circuit 11.

The history management circuit 20 has a control unit 21 such as a CPU (central processing unit) for performing control processing of the entire circuit, and a calculation unit 22. The control unit 21 includes a ROM (read-only memory) that stores programs and data for processing procedures.
23 and RA for temporarily storing data being processed
In addition to an M (readable / writable memory) 24, a PROM (writable nonvolatile memory) 2 for storing manufacturing history information and failure repair information of this printed circuit board
5 is connected.

A clock unit 27 is connected to the control unit 21 via an input / output unit 26. The clock unit 27 is configured such that power is supplied from an external power source as well as a backup battery 28, and the connectors 13 and 29 are used.
Keeps the correct date and time even when is not connected to the outside.

A signal indicating the operating state of the base circuit 11 is given to the input / output unit 26, and a history management connector 29 is connected. The connector 29 is connected to a history management device and a jig to input manufacturing history information and failure repair information to be stored in the PROM 25, and also to the PROM 2
The history information read from No. 5 is output. Further, electric power for operating the history management circuit 20 is supplied from the history management device or the like via the connector 29.

Next, the operation will be described. After the components of the base circuit 11, the power supply circuit 12, and the history management circuit 20 are mounted on the printed wiring board to assemble the printed circuit board, the history management device and the jig are connected to the connector 29, and the clock unit 27 is connected. The current date and time is set. Also,
Unique information such as the type of the printed circuit board and the identification number is input from the history management device or the like, and the unique information is written in the PROM 25 by the control unit 21. Furthermore, from the history management device, etc., the "version number management of the printed wiring board", "component mounting instruction version number management", "design change insert management", "base manufacturing place data", "base" that had been obtained so far Information in the manufacturing process of the printed circuit board such as “visual inspection result” is input and stored in the PROM 25.

Next, the connector 13 is connected to the board testing device, and a board unit inspection is performed. Then, the information of the "base single unit inspection result" is input from the history management device, etc.
It is stored in the OM 25.

Further, at each stage before shipment, information such as “device mounting inspection”, “pre-shipment inspection”, “in-process defect countermeasure insert data management” and “shipping destination management” is stored in the PROM 25 from the history management device or the like. Is stored.

When such a printed circuit board is housed in the outer casing as a component of the apparatus or mounted on the user's side apparatus to be in the operating state, the history management circuit 20
Then, power supply from the power supply circuit 12 is started. As a result, the operation of the base circuit 11 is detected by the control unit 21, and the date and time data given from the clock unit 27 is stored in the PROM 25 as the "customer working day management" information.

Furthermore, during operation, the control section 21 monitors signals indicating the operating state of the base circuit 11. And
When a failure occurs, the date and time data given from the clock unit 27 is added to the failure information and stored in the PROM 25 as "failure occurrence management" information.

The printed circuit board which has been returned to the factory side due to a failure is connected to a history management device, etc.
All history information during the manufacturing process and operation stored in 25 is read. As a result, appropriate measures such as repair and repair can be taken. Furthermore, after the repair, maintenance information such as “fault countermeasure management” is stored in the PROM 25.

As described above, the printed circuit board according to the first embodiment has the following advantages. (1) PROM2 in the board, which contains manufacturing history information of the printed circuit board, operation status during operation, failure information during failure, etc.
5 can be stored in detail and stored. In addition, since the information can be read directly from the printed circuit board, the manufacturing process can be easily controlled. This will allow you to fill out management ledgers, personal
It is possible to eliminate the troublesomeness of the input operation to the computer.

(2) Since the history management circuit 20 has a structure independent of the base circuit 11 that executes the original function, the quality of the base circuit 11 is not a concern and a simple circuit can be adopted. For example, the history management circuit 2
0 can be configured with a small number of components by using a microprocessor with a built-in memory or the like. As a result, the history management circuit 2 with high yield and reliability can be obtained.
0 can be configured.

(3) The history management circuit 20 includes a clock unit 27
And a backup battery 28. As a result, it is possible to accurately grasp the operational information such as the period of actual operation.

(4) Since it has a dedicated connector 29 for connecting to the outside, it can be easily connected to a history management device or the like.

(Second Embodiment) FIGS. 2A and 2B.
[Fig. 6] is a configuration diagram of a printed circuit board showing a second embodiment of the present invention, in which (a) is a block configuration diagram and (b) is a plan view. In FIG. 2, FIG.
Elements that are the same as the elements inside have the same reference numerals.

In this printed circuit board, the history management circuit 20 shown in FIG.
A is provided. The history management circuit 20A is provided with a terminal 30 based on a land pattern of a printed wiring board instead of the connector 29 in FIG. 1, and other configurations are as follows.
It is similar to FIG.

In this printed circuit board, the probe of the jig for history management is brought into contact with the terminal 30, and the PROM 25
History information is written to and read from.
Other operations are the same as those in the first embodiment.

As described above, in addition to the advantages (1) to (3), the printed circuit board of the second embodiment has
It has the following advantages. (5) Since no mechanical parts such as the connector 29 are required, the reliability can be improved and the cost increase of the printed circuit board by the history management circuit 20A can be suppressed.

(Third Embodiment) FIGS. 3A and 3B.
[Fig. 6] is a configuration diagram of a printed circuit board showing a third embodiment of the present invention, in which (a) is a block configuration diagram and (b) is a plan view. In FIG. 3, FIG.
Elements that are the same as the elements inside have the same reference numerals.

In this printed circuit board, the history management circuit 20 in FIG. 1 is replaced with a history management circuit 20 having a different configuration.
B is provided. The history management circuit 20B is provided with a transmission / reception unit 31, an antenna 32, and a power supply unit 33 for wirelessly connecting to a history management device or the like and transmitting / receiving data, instead of the connector 29 in FIG. The power supply unit 33 is
Electric power for operating the history management circuit 20B is extracted from the electromagnetic wave received by the antenna 32. Other configurations are the same as those in FIG.

In this printed circuit board, a history management device or the like is wirelessly connected, and history information is written to or read from the PROM 25. Other operations are the same as those in the first embodiment.

As described above, in addition to the advantages (1) to (3), the printed circuit board according to the third embodiment has the following advantages.
It has the following advantages. (6) It has an antenna 32 and a transmission / reception unit 31 for contactlessly transmitting and receiving history information. As a result, the information in the manufacturing process can be written in a non-contact manner to the printed circuit board passing on the manufacturing line, so that the work for writing the information can be simplified.

(7) Therefore, if the components of the history management circuit 20B are first mounted on the printed wiring board, the information of the subsequent manufacturing process can be written in the PROM 25 without omission.

(Fourth Embodiment) FIGS. 4A and 4B.
[Fig. 6] is a configuration diagram of a printed circuit board showing a fourth embodiment of the present invention, in which (a) is a block configuration diagram and (b) is a plan view. In FIG. 4, FIG.
Elements that are the same as the elements inside have the same reference numerals.

In this printed circuit board, the alarm controller 1
4, a display unit 15 and a photo coupler 16 are provided. The alarm control unit 14 outputs and displays the failure information on the display unit 15 based on the signal of the operating state of the base circuit 11, and codes the failure information to photocoupler 16 the same.
Is output to. The photocoupler 16 is, for example, an optical coupling of a light emitting diode and a phototransistor, and is an element for electrically insulating and transmitting a signal. The output side of the photocoupler 16 has a history management circuit 20.
It is connected to the C input / output unit 26. Other configurations are
It is similar to FIG.

In the printed circuit board, in the manufacturing process and the maintenance work, as in the third embodiment, the history management device is wirelessly connected to write and read the history information to and from the PROM 25. On the other hand, in the operating state, the base circuit 11 is optically connected by the photocoupler 16 and its operating state is monitored.

As described above, the printed circuit board of the fourth embodiment has the following advantages in addition to the advantages (1) to (3), (6) and (7). (8)
Since the base circuit 11 and the history management circuit 20C are connected via the photocoupler 16, it is possible to eliminate erroneous detection of a failure due to spike noise on the base circuit 11 side.

(Fifth Embodiment) FIGS. 5A and 5B.
[Fig. 8] is a configuration diagram of a printed circuit board showing a fifth embodiment of the present invention, in which (a) is a block configuration diagram and (b) is a plan view. In FIG. 5, FIG.
Elements that are the same as the elements inside have the same reference numerals.

In this printed circuit board, a transmitter 17 and an antenna 18 for wirelessly transmitting coded fault information are provided instead of the photocoupler 16 in FIG. Then, as shown in FIG. 5B, the antenna 18 is formed in a print pattern so as to be electromagnetically coupled to the antenna 32 of the history management circuit 20D.

In the printed circuit board, in the manufacturing process and the maintenance work, as in the third embodiment, the history information is written to and read from the PROM 25 by wirelessly connecting to the history management device or the like. On the other hand, in the operating state, the history management circuit 20E and the base circuit 11 are wirelessly connected by the antennas 18 and 32, and the operating state thereof is monitored.

As described above, the printed circuit board of the fifth embodiment has the following advantages in addition to the advantages (1) to (3), (6) and (7). (9)
Since the base circuit 11 and the history management circuit 20D are connected via the antennas 18 and 32, erroneous detection of a failure due to spike noise can be eliminated.

(Sixth Embodiment) FIGS. 6A and 6B.
[Fig. 6] is a configuration diagram of a printed circuit board showing a sixth embodiment of the present invention, in which (a) is a block configuration diagram and (b) is a plan view. In FIG. 6, FIG.
Elements that are the same as the elements inside have the same reference numerals.

As shown in FIG. 6 (b), this printed circuit board has components of the board circuit 11 and the power supply circuit 12 and a connector 19 for mounting the history management circuit board 20E mounted on a printed wiring board. It is a thing. The base circuit 11 and the power supply circuit 12 are the same as those in FIG. 1, and are connected to the outside via a connector 13. On the other hand, the history management circuit board 20E is formed in a card shape by mounting the history management circuit on a board. The connector 34 of the history management circuit board 20E corresponds to the connector 19 on the printed circuit board side, as shown in FIG. 6 (a).
Other configurations are the same as those in FIG.

Next, the operation will be described. The components of the base circuit 11 and the power supply circuit 12 and the connector 19 are mounted on the printed wiring board to assemble the printed circuit board.
Then, various inspections are performed on the printed circuit board. Separately from this, each component is mounted on the printed wiring board for the history management circuit board to assemble the history management circuit board 20E.

When the printed circuit board is shipped, the history management circuit board 20E mounted on the printed circuit board is connected to the history management device by the connector 34. And the clock unit 27
The current date and time for is set. Further, from the history management device, unique information such as the type and identification number of the printed circuit board on which the history management circuit board 20E is mounted is input and stored in the PROM 25. Furthermore, from the history management device, "printed wiring board version number management", "component mounting instruction version number management", "design change insert management", "board manufacturing place data" of the printed circuit board that had been obtained so far. , "Foundation inspection result", "Individual inspection result",
Information in the manufacturing process such as “device mounting inspection”, “pre-shipment inspection”, “in-process defect countermeasure insert data management”, “shipping destination management”, etc. is input and stored in the PROM 25.

The history management circuit board 20E in which the information of the manufacturing process is stored is detached from the history management device, mounted on the corresponding printed circuit board, and shipped.

When such a printed circuit board is housed in the outer casing as a component of the apparatus or mounted on the user's side apparatus to be in the operating state, the history management circuit board 2
Supply of power from the power supply circuit 12 is started at 0E.
As a result, the operation of the base circuit 11 is detected by the control unit 21, and the date and time data given from the clock unit 27 is stored in the PROM 25 as "customer working day management" information.

Furthermore, during operation, the control section 21 monitors signals indicating the operating state of the base circuit 11. And
When a failure occurs, the date and time data given from the clock unit 27 is added to the information, and the information is stored in the PROM 25 as "failure occurrence management" information.

The defective printed circuit board is returned to the factory. Then, the history management circuit board 20E is removed from the printed circuit board and connected to the history management device. As a result, the PROM2 of the history management circuit board 20E
It is possible to read out all the history information stored in the manufacturing process and during operation, and to take appropriate measures such as repair and repair. Further, after the repair, maintenance information such as "fault countermeasure management" is stored in the PROM 25 of the history management board 20E and plugged into the connector 19 of the printed circuit board again.

As described above, in addition to the advantages (1) to (3), the printed circuit board of the sixth embodiment has the following advantages.
It has the following advantages. (10) History management circuit board 20
Since E can be freely removed from the printed circuit board, it can be easily connected to the history management device.

The present invention is not limited to the above embodiment, but various modifications can be made. Examples of this modification include the following. (A) History information such as "version number management of printed wiring board" and "component placement instruction version number management" is an example, and history information corresponding to a product can be used.

(B) In FIGS. 1 to 3, the signal of the base circuit 11 is input to the input / output unit 26 as it is. However, as in FIG. 4, the alarm control unit 14 and the photocoupler 1 are connected.
You may make it input via 6. Thereby, the influence of noise can be suppressed.

(C) Transceiver 31 and antenna 3 in FIG.
2, a connector 29 similar to that of FIG.
Alternatively, a terminal 30 similar to that shown in FIG. 2 may be provided.

(D) History management circuit board 20E in FIG.
In addition, the transmitter / receiver 31 and the antenna 3 similar to those in FIG. 3 or FIG.
2 and the power supply unit 33 may be provided to wirelessly connect the base circuit 11 side and the history management device. As a result, data can be transmitted and received in a contactless manner, and reliability can be improved.

[0067]

As described above in detail, according to the first aspect of the invention, the history management circuit for storing the history information and the operation information in the nonvolatile memory is provided on the printed circuit board. This enables accurate and detailed history information management.

According to the second invention, since the connector for inputting and outputting the history information and the like is provided, it can be easily connected to the history management device and the like.

According to the third aspect of the invention, since the history information and the like are input and output by the terminals of the land pattern,
The cost increase of the printed circuit board due to the history management circuit can be suppressed.

According to the fourth invention, the input / output of history information and the like is performed wirelessly. As a result, the information in the manufacturing process can be written in a non-contact manner on the printed circuit board passing on the manufacturing line.
The work for writing information can be simplified.

According to the fifth aspect of the invention, since the signal of the operating state of the base circuit is received via the photocoupler, it is possible to eliminate erroneous detection of a failure due to spike noise.

According to the sixth aspect of the present invention, the signal of the operating state of the base circuit is wirelessly received, and the history information and the like are wirelessly transmitted / received to / from the outside. As a result, the information in the manufacturing process can be written in a non-contact manner on the printed circuit board passing on the manufacturing line.
The work for writing information can be simplified.
Further, false detection of a failure due to spike-like noise of the circuit board can be eliminated.

According to the seventh invention, since the history management circuit board can be freely attached to and detached from the printed circuit board, connection to the history management device is easy.

According to the eighth invention, the history management circuit board is
It can be freely attached to and detached from the printed circuit board, and wireless information can be read and written without contact. As a result, the information in the manufacturing process can be written in a non-contact manner to the printed circuit board passing on the manufacturing line, so that the work for writing the information can be simplified. Further, false detection of a failure due to spike-like noise of the circuit board can be eliminated. Also, by removing the history management circuit board from the printed circuit board, connection to the history management device is easy.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a printed circuit board showing a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a printed circuit board showing a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a printed circuit board showing a third embodiment of the present invention.

FIG. 4 is a configuration diagram of a printed circuit board showing a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram of a printed circuit board showing a fifth embodiment of the present invention.

FIG. 6 is a configuration diagram of a printed circuit board showing a sixth embodiment of the present invention.

[Explanation of symbols]

11 circuit board 16 Photo coupler 17 Transmitter 18,32 antenna 19,29,34 connector 20-20D history management circuit 20E history management circuit board 21 Control unit 25 PROM 27 Clock Department 28 batteries 30 terminals 31 Transmitter / receiver 33 power supply

Claims (8)

[Claims] 1. In a printed circuit board having a printed circuit board on which printed circuit board components for performing a predetermined function are mounted, manufacturing history information and failure repair information given from the outside, and operating state information output from the basic circuit. A printed circuit board having a history management circuit for storing the data in a non-volatile memory. 2. The history management circuit has a connector for inputting the manufacturing history information and failure repair information from the outside and outputting the information stored in the nonvolatile memory to the outside. The printed circuit board according to item 1. 3. The history management circuit has a land pattern terminal for inputting the manufacturing history information and failure repair information from the outside and outputting the information stored in the nonvolatile memory to the outside. The printed circuit board according to claim 1. 4. The history management circuit has a wireless transmission / reception unit for inputting the manufacturing history information and failure repair information from the outside and outputting the information stored in the nonvolatile memory to the outside. The printed circuit board according to claim 1. 5. The printed circuit board according to claim 2, wherein the history management circuit is configured to receive a signal indicating an operating state of the board circuit via a photocoupler. 6. A transmitter is provided for wirelessly outputting information on the operating state of the base circuit, and the history management circuit is provided from the outside with the manufacturing history information and the failure repair information and the transmitter. 5. The printed circuit board according to claim 4, further comprising a wireless transmission / reception unit for inputting information on an operating state of the board circuit to be output and outputting the information stored in the nonvolatile memory to the outside. 7. A printed circuit board having a printed circuit board on which parts for a basic circuit that perform a predetermined function are mounted, and manufacturing history information and failure repair information given from the outside and operating state information output from the basic circuit. A printed circuit board provided with a connector for detachably mounting a history management circuit board storing the data in a non-volatile memory. 8. The history management circuit board has a wireless transceiver for inputting the manufacturing history information and failure repair information from the outside and outputting the information stored in the nonvolatile memory to the outside. The printed circuit board according to claim 7.