JPS6042892A - Printed 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 Application of the Invention] The present invention relates to a printed circuit board in which a conductive pattern for signal connection or component mounting is formed on the surface of an insulating base material such as epoxy or ceramic, and particularly relates to a (This relates to a printed circuit board suitable for removing board information such as board product name, eyebrows, layer history, etc. during a turn continuity test.

[Background of the Invention] An example of the structure of a conventional printed circuit board is shown in FIG. 1. FIG. 1(a) shows an overall plan view of the board, and FIG. 1 is a printed circuit board in which a conductive pattern 5 of a signal line or pad is formed on the surface of an insulating base material 4 made of epoxy or ceramic by printing or etching technology. These conductor patterns 5 are arranged in the wiring area 2 at the center of the printed circuit board 1 . On the other hand, in order to identify these conductor patterns 5, board information such as the board product name, first layer name, and layer history is displayed on each board, but these displays are performed in the board information display area 3 outside the wiring area 2. It is common to use alphabets or numbers.

FIG. 2 shows details of a display example of the board information.

In the example of this figure, A, 100 indicates the board product name, the next A indicates the eyebrows of the board, and the last 0 indicates the pattern history. The display area 3 for these board information is provided outside the wiring area 2.

However, general printed circuit boards 1 range from one base material 1 to multilayer boards having ten or more base materials laminated. The tests for these boards mainly involve checking for disconnections in the conductor patterns 5 and short circuits between the conductor patterns 5. This testing method involves setting up probe pins for continuity testing on each grid (butt) of the board, and comparing the disconnection and short circuit information between these probe pins with the continuity testing data corresponding to the product name of the board under test. The idea is to do this. In this case, conventionally, when testing a board, the product name 1 of the board to be tested, the eyebrows.

Board information such as layer history is manually input into the continuity testing device while looking at the display area 3 of the board, and the test data of the tested board corresponding to the board information is read out from a file, etc., improving the work efficiency of the production line. It was becoming a bottleneck. In addition, as a countermeasure for this, the product name is written in alphabets, numbers, etc. in the first layer.

There is also a method of automatically reading and inputting board information such as layer history using an optical character reader, but this requires an additional character reader and has the disadvantage of requiring an expensive continuity testing device. ,Ta.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned points, and is capable of automatically determining the product name of the board, etc., without using a special 9-discriminator when testing the continuity of a printed circuit board, and testing the continuity of the board under test. An object of the present invention is to provide a printed circuit board on which data can be set and the board can be tested efficiently.

[Summary of the invention] The main point of the present invention is to form board information such as the board product name, layer name, layer history, etc. on the surface of a printed circuit board in a pattern similar to a conductor pattern for normal signals, etc., and conduct continuity inspection during board testing. The device is capable of detecting the board information.

[Embodiments of the invention]

Embodiments of the present invention will be described below based on the drawings.

FIG. 3 is a diagram showing a part of the printed circuit board according to the present invention. In the board information display area 3 outside the wiring area 2 of the board 1, there are five bats 6 ( (corresponding to A100- in Figure 2), two bats 7 that display the eyebrows of the board (corresponding to -A-L; in Figure 2), and two bats that display the layer history of the board. 8° (corresponding to part of FIG. 2). Furthermore, one reference pad 9 is provided, and a line 1O is provided that connects this reference pad 9 to the pads 6 to 8 for displaying the product name, eyebrows, and layer history of the substrate. The method of forming the conductor pattern 5 on the board 1 and the pattern in the wiring area 2 are the same as the conventional structure, and bats 6 to 8 displaying the product name, eyebrows, and layer history of the board. Reference bat 9 and line l
O is formed in the same manner as the conductor pattern 5 in the wiring region 2.

Now, the pad connected to the reference pad 9 is 1'11
'', and if the distance is 0, then in the case of FIG. 3, the product name is ``10100'', the first layer name is tt 10 N, and the layer history is ``01'', which are displayed as binary information. Needless to say, if the product name, eyebrows, etc. change, the pattern of line 10 will also change, and the binary information will differ.

The continuity test for the printed circuit board described above is performed by connecting a large number of pins 22 provided on the continuity test probe 21 of the continuity test device to the conductor pattern 5 and bats 6 to 9 in the wiring area 2, as shown in FIG. The output of this pin 22 is scanned by the processing device 23. At this time, by checking the continuity between the reference pad 9 and the pads 6 to 8 that display the product name, layer name, and layer history of the board, the product name is displayed along with the conductor pattern. , eyebrows, and layer history binary information "101001001" are also read. The processing device 23 reads the continuity test data corresponding to the board 1 from the file 26 based on the read board information, and uses this and the continuity test data input from the wiring area 2 input from the continuity test blow 21.
The processing device 23 outputs the test results to the printer 24 and records the continuity test results on printer paper 25. At this time, the processing device 23 also outputs board information to the printer 24.

As a result, board information is recorded on the paper 25 along with the inspection results as shown in the figure.

FIG. 5 is a diagram showing a part of another printed circuit board according to the present invention for displaying board information, in which a reference pattern (corresponding to the batt 9 and line IO in FIG. 3) is provided on the back side of the board 1, and the back side 2 depending on the presence or absence of through-hole hole 11 for connection with
Create evolutionary data. Now, there is a through hole 11, and if there is a connection with the back side, it is 11'', through hole hole 11
If there is no connection and there is no connection, #O#l, in the case of Figure 5, the bat 6 that displays the product name is '11010', the pad 7 that displays the eyebrows is 'ot', and the pad that displays the layer history is '11010'. 8 becomes 'ot'.

FIG. 6, similar to FIG. 5, is a diagram showing a part for displaying board information of another printed circuit board according to the present invention, in which two reference pads 9a and 9b are provided to display one product name and one layer name.

Among the bats 6 to 8 to display the layer history powder, those connected to the reference bat 9a and line 10a are #1lllQ those connected to the reference pad 9b and line 10b are II
2 II, if it is not connected to either of the reference pads 9a or 9b, it indicates 110u. In the case of the same figure, the pad 6 that displays the product name is '0211G', and the pad 7 that displays the eyebrows is '12 '', the bat 8 that displays the layer history is II 20 II.Also, in the case of Fig. 6, there are two standard pads 9a, 9b-(7), and a ternary case is shown, but three standard pads are used. , by increasing the number to 4,
It can also be converted into quaternary or quinary notation, and the number of bits can be reduced to create board information data.

It goes without saying that the above method for displaying board information such as product name can be applied to a single base material or a board with a large number of laminated boards. Further, the board information can be displayed by using five different common patterns instead of setting the reference pads and checking the continuity between the bats 6 to 8 and the common patterns.

〔Effect of the invention〕

As explained above, the printed circuit board according to the present invention eliminates the need to manually input board information data such as the product name of the board from the outside during the continuity test of the board, and the printed circuit board according to the present invention eliminates the need for manually inputting board information data such as the product name of the board from the outside. Since the continuity test data can be automatically read during the process, the continuity test data can be extracted from the file, and the continuity test can be performed, the efficiency of the continuity test work can be improved and erroneous input of board information data can be prevented. In addition, since there is no need for a high-precision optical character reader, continuity testing can be done at low cost.Furthermore, since board information can be displayed in the same way as a normal conductor pattern, it is possible to achieve higher density than conventional alphanumeric representation. It has excellent effects such as:

[Brief explanation of drawings]

Figure 1 is a diagram showing an example of a conventional printed circuit board structure. Figure (a') is an overall plan view of the board, Figure (b) is a partial cross-sectional view of the board, and Figure 2 is a diagram showing an example of a conventional printed circuit board structure. 3 is a diagram showing an example of displaying board information on a printed circuit board according to the present invention; FIG. 4 is a block diagram of a continuity testing device; FIGS. FIG. 6 is a diagram showing an example of displaying other board information of the printed circuit and board according to the present invention. DESCRIPTION OF SYMBOLS 1... Printed circuit board, 2... Wiring area, 3... Board information display area, 4... Insulating base material, 5... Conductor pattern, 6... Product name display pad, 7... ...Eyebrow display pad, 8...Layer history display pad, 9...Reference pad. 10...Line, 11...Through hole, 21.
... Continuity test probe, 22... Pin, 23... Processing device, 24... Printer, 25... Printer paper, 26... File. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] (1) In a printed circuit board in which a conductor pattern for attaching components or signal connection is formed on the surface of an insulating base material, and this base material is used singly or in a stack, a pattern indicating board information is placed on the board. A printed circuit board characterized in that it is formed in the same format as a pattern.