JPS60206082A - Printed circuit substrate - 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 [Technical Field of the Invention] The present invention relates to a printed circuit board in which historical data such as test and repair data relating to the main circuit can be written and read out as needed.

[Technical background of the invention and its problems]

In the past, historical data of the main circuit was recorded in a separate device from the circuit board, and this data was read out as needed to help discover the cause of failure.

That is, to explain this with reference to FIG.
A change symbol entry mark (3) is placed on the circuit board body (2) on which the main circuit is formed by arranging the circuits (1).

Type number (4) 0 Type minor change symbol (5), improvement symbol (6
) is now entered. In the change symbol entry mark (3), history items in the manufacturing process such as external shape machining, drilling, machining, inserting one part, and flounder are marked. The type number (4) is a type number of the main circuit.

The type unchanged symbols (5) are displayed in alphabetical order according to the number of times a function is added.

The improvement symbol (6) indicates a partial improvement change (
(not including function additions) are displayed in numbers according to the number of times they have been added.

In this way, the printed circuit board (7) is constructed, its change symbol (3) is determined by the manufacturing process, type number (4), type minor change symbol (5), improvement symbol (6).
The above-mentioned history items are displayed during the design process.

Printed circuit board (7) with history information written in this way
), as shown in Figure 2, the interface (8), tester 19), recording medium
Tests are performed using a test device in which each i1 is configured as a signal network. i.e. printed circuit board (
7) tests the test program corresponding to the various encoded histories on the recording medium (11) and visually compares the correspondence between the notation of 11 and the type number of the printed circuit board to ensure consistency. The tester (9) was used to check for non-defective products.

However, in recent years, as the degree of integration of ICs has improved, printed circuit boards have also become more diverse in terms of functionality. In automatic testers used for processing, the position of the adapter pins in the test equipment may shift due to changes in the jig type for processing or changes in the position of the patterned parts, which may cause the product to not match the program, resulting in a defective product even though it is a good product. □On the other hand, in the case of a defective printed circuit board, the part number or code of the printed circuit board may change due to the customer's standardization of part numbers or codes, or the IC type may change due to parts procurement. The display of parts such as names may have changed. In other words, if there is a replacement of a component such as an IC that is functionally the same but has a different model name, the component display may be treated as unchanged, and even in such cases, the consistency of the gramogram is not guaranteed. This method has the disadvantage of causing confusion in the process of investigating the problem.

[Purpose of the invention]

The present invention has been made in view of the above points, and it is an object of the present invention to record history items that are considered to have an influence on test results, and at the same time to prevent misinterpretation due to reading and writing of the display on the printed circuit board body.

[Summary of the invention]

That is, in order to ensure complete consistency between the printed circuit board and the test program, a memory element such as a printed circuit board KROM is incorporated, and history information of the printed circuit board is recorded in this.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention shown in FIGS. 3 and 4 will be described. Reference numeral al) is a printed circuit board (hereinafter referred to as a board), and a circuit portion (11a ) and a connector section at the end (14) is a ROM (memory circuit section) that can write and read data at any time, and is provided independently of the circuit section (ha). Similar to (lla), 0(L) is connected to the outside through the connector section.
9 is a printed circuit board automatic tester (hereinafter referred to as a tester)
) has a built-in comparator (not shown), and the circuit section (4i
The zero slope that sends and receives test signals to a) is ROMIJ.
- a reader & writer connected to the tester ttS, and connected to the R
OM reader & writer (via IQ.

Records, adds and corrects information to the ROM (14).

It is a trap so that it can be deleted. The storage medium η is a recording medium such as a magnetic disk or a magnetic tape that records various programs, and the test program index information signal from the tester α4 is inputted as the data signal a or a′ by which the recorded information of the ROMa is input. Based on this, a test program information signal C corresponding to this is output to the tester mata 9. Said tester a! 19 checks the match between the test program index information signal C and the test program information signal C, and if they match, calls this test program to this tester and at the same time calls the test program to the test program information signal C. Necessary tests can be performed by applying the circuit information from the section (11a) to the test program.

aυ is a tie lighter and a tester Q9. ROM league & writer (signal system dK via lE9) Recorded contents of j5ROMQ41 can be rewritten or written at any time.If a malfunction is found in the tester U9, this repair can be done. It is now possible to add new information to the history symbol.
, OM (14) records the following information C data.

■Model number indicating the type of the board body and minor changes and improvement symbols, ■Test program number indicating the type of test program, ■Test result data, ■Repair history including failure date, failure status, replacement parts, etc. , (2) Usage history such as serial number and usage environment of the upper unit (unit to be assembled) The above (2) and (2) are information for matching the board body (17J) and the corresponding test program. However, when testing a certain board 0υ,
First, this board aυ is connected to the tester (is and OM reader & writer tte) via the connector part (3). Although not shown in the drawings, for this connection, the board t1υ is fitted into a predetermined position of the tester device. By doing this, the information signal ai or a' from the ROM 114) and the test program information signal C from the recording medium side can be set by the comparator (1!9) of this tester (1!9). (not shown)
and test this board (lυ) based on this matched test program. At this time, the ROM (
Reading of the 141 information is performed directly from this R, OM (14) or via the ROM reader & writer (11).

This is because the board aυ is required to grasp items that are not included in the normal check items as history information each time, such as appropriate turn changes taking into account history information, and to adjust the test equipment in advance when conducting a test.

The case where the product is determined to be defective as a result of this test will be explained: (1) First, history information is checked, and based on this history, the first possible cause is determined. (If the first cause is not found, investigate the second and third possible causes.) ■Repair based on the cause.

■Enter the repair details as history items according to a predetermined procedure using Taigurita Alpha.

(As a result, new history items are recorded as data in the ROM haze.) After a series of operations like this, the board (1υ
When the product becomes defective again and is sent to a tester,
The history of the above-mentioned repair details is further taken into account, and appropriate tests and results are used to perform appropriate repairs as necessary.

〔Effect of the invention〕

According to the present invention, as described above, there is a main circuit board, a main circuit section printed on the main circuit board, and a memory circuit section such as a ROM provided independently from the main circuit section.
Since the memory circuit section can write and read history data in the main circuit section at any time, the circuit section and its history always match during testing, so the history does not match the board as in the past. can be recorded on a separate recording medium such as a floppy disk, and can save the manual effort of matching data for each test. At the same time, it can also eliminate the trouble of writing symbols on the board itself. In other words, the so-called history It is sufficient to input the information directly into the memory circuit section.

Since a tester that automatically reads this data can be used, it is possible to make incorrect judgments about failures caused by mismatches, even if the data match is certain and indicate that the product is good, or to investigate the cause of the failure if the product is defective. It is extremely convenient and does not cause any confusion. This makes it easy to understand the repair history and usage history of the printed circuit board, which also leads to maintaining improved reliability and quality of the product.

Furthermore, in the event that a failure occurs during use, by applying it to a tester, it is possible to conduct a proper test and check the history, so the cause of the failure can be discovered more quickly and accurately. It is not limited to the structure, but as shown in Figure 4, a memory circuit section such as a ROM that is completely independent of the circuit section and connector section provided on the board body (2). (c) is established,
The information of this memory circuit section (c) may be input to the tester through a separate signal system (not shown). That is, it is possible to physically fix the memory circuit section (c) to the board main body (c) and read the data signal using a jig such as an IC or a clip.

Particularly in this case, the number of bins in the connector section can be reduced by the number of signal lines compared to the case of the above-mentioned embodiment.
The circuit design and furthermore the circuit design of the tester becomes easier.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a conventional printed circuit board, FIG. 2 is a diagram showing a printed circuit board testing apparatus of the present invention, and FIG. 3 is a diagram showing another embodiment of the present invention. Printed circuit board, (11a) (2)...Circuit section, a @...Printed circuit board body, Q3 (to)...Connector section, <141...FLOM (memory circuit section ), Q! 19...Printed circuit board automatic tester, e...ROM reader and writer, αη...recording medium, a barrel...tiger writer, (to)...memory circuit section. Yu 3

Claims (2)

[Claims] (1) A printed circuit board body, a main circuit section printed on the printed circuit board body, and a memory circuit section provided independently from the main circuit section, and the memory circuit section includes: A printed circuit board characterized in that history data of the main circuit section can be written and read at any time. (2) Claims characterized in that the memory circuit section is provided independently of the main circuit section, and data signals thereof can be taken out separately from the main circuit section. The printed circuit board according to item 1.