CN103033521A - Wiring detection method and wiring detection system - Google Patents

Abstract

The invention discloses a wiring detection method and a detection system. The steps of the method are as follows: a coordinate system and data information for testing are established in advance according to a gold plate, and the data information includes the coordinates of the test points for detecting wiring breaks, and the coordinates for detecting wiring breaks. The coordinate group of the test point short-circuited with the adjacent wiring and the preset lighting feedback value used to identify the wiring; according to the coordinate system, the coordinates of the test point and the preset lighting feedback value, scan the current wiring to be tested on the circuit board to be tested , to determine whether the current wiring to be detected is disconnected at the coordinate position of the test point; and, according to the coordinate system, the coordinate group of the test point and the preset illumination feedback value, scan the current wiring to be detected to the adjacent wiring to be detected, and judge the current wiring to be detected Whether there is a short circuit with the adjacent wiring to be tested. The beneficial effects of the present invention are as follows: by optically detecting circuit board wiring, accurate positioning of wiring defect positions is realized, and the yield rate and production efficiency of the production line are improved.

Description

A wiring detection method and detection system

technical field

The invention relates to the field of liquid crystal manufacturing, in particular to a wiring detection method and a detection system.

Background technique

With the continuous advancement of the Printed Circuit Board (PCB) process, the line width and line spacing of the printed circuit board wiring are getting smaller and smaller, in order to meet the circuit board requirements of different products and save the width of the circuit board. However, since the width of the wiring and the spacing between the lines are very small, it is easy to have an open circuit or a short circuit, which will cause troubles in production. In order to solve this problem, an electrical testing method is generally used in the prior art to detect whether there is a short circuit or an open circuit in the wiring of the circuit board.

However, the electrical test method can only detect whether there is a short circuit or an open circuit in the circuit board wiring, but cannot feedback the specific coordinate position of the short circuit or open circuit defect in the circuit board wiring, which will cause defective products to be found in time and affect the production efficiency of the production line .

Contents of the invention

The purpose of the present invention is to provide a wiring detection method and detection system to solve the problem in the prior art that the electrical test cannot detect the specific location of the feedback circuit board defect.

The purpose of the present invention is achieved through the following technical solutions:

An embodiment of the present invention provides a wiring detection method, the steps are as follows:

The coordinate system and data information used for testing are established in advance according to the gold plate, and the data information includes the coordinates of the test points used to detect the disconnection of the wiring, the coordinate group of the test points used to detect the short circuit between the wiring and the adjacent wiring and preset lighting feedback values for identifying wiring;

According to the coordinate system, the coordinates of the test point and the preset illumination feedback value, optically scan the current wiring to be tested on the circuit board to be tested, and determine whether the current wiring to be tested is open at the coordinate position of the test point ;as well as,

According to the coordinate system, the coordinate group of the test point and the preset illumination feedback value, optically scan the current wiring to be detected to the adjacent wiring to be detected, and determine whether the current wiring to be detected is the same as the adjacent wiring to be detected. Detects short circuits between wires.

Preferably, a machine-readable code is set on the circuit board to be detected in advance, and the coordinates of the machine-readable code are stored in the data information, and the machine-readable code is used to identify the Wiring to be tested.

Preferably, the step of detecting the disconnection of the current wiring to be detected is as follows:

Finding the coordinates of the machine readable code according to the coordinate system, so as to hit the current wiring to be detected;

According to the coordinates of the test points of the wiring to be detected, optically scan the current wiring to be detected on the circuit board to be detected, and when the scanned illumination feedback value is the preset illumination feedback value, the current wiring to be detected The position of the wiring at the coordinates of the test point is normal; when the scanned illumination feedback value is not the preset illumination feedback value, the current wiring to be detected is broken at the position of the coordinates of the test point.

Preferably, the step of detecting the short circuit between the current wiring to be detected and the adjacent wiring to be detected is as follows:

Finding the coordinates of the machine readable code according to the coordinate system, so as to hit the current wiring to be detected;

According to the coordinate group of the test point, optically scan the current wiring to be detected of the circuit board to be detected to the adjacent wiring to be detected, when the illumination feedback value between the scanned coordinate groups does not have the required When the preset illumination feedback value is set, the current wiring to be detected and the adjacent wiring to be detected are not short-circuited between the coordinate groups of the test points; when the scanned lighting feedback between the coordinate groups When the value has the preset illumination feedback value, the current wiring to be detected and the adjacent wiring to be detected are short-circuited between the coordinate groups of the test points.

Preferably, it also includes a judgment result of whether the current wiring to be detected is disconnected at the coordinate position of the test point, and the coordinates at the test point between the current wiring to be detected and the adjacent wiring to be detected The result of judging whether there is a short circuit between groups, output scan data or scan graphics.

Preferably, the machine-readable code is a two-dimensional code or mask pattern that can be recognized by the optical detection device.

The beneficial effects of the present invention are as follows: by optically detecting circuit board wiring, accurate positioning of wiring defect positions is realized, and the yield rate and production efficiency of the production line are improved.

An embodiment of the present invention provides a wiring detection system,

The preset unit is used to pre-establish a coordinate system and data information for testing according to the gold plate, and the data information includes coordinates of test points for detecting wiring breaks, and for detecting short circuits between the wiring and adjacent wiring. The coordinate group of the test point and the preset lighting feedback value used to identify the wiring;

An optical scanning unit, configured to scan the current wiring to be detected of the circuit board to be detected according to the coordinate system, the coordinates of the test point and the preset illumination feedback value; or, according to the coordinate system, the test point coordinate group and the preset illumination feedback value, scanning the current wiring to be detected to the adjacent wiring to be detected;

The judging unit is configured to judge whether the current wiring to be detected is disconnected at the coordinate position of the test point; or is used to judge whether there is a short circuit between the current wiring to be detected and the adjacent wiring to be detected.

Preferably, the preset unit is also used to pre-set the coordinates of the machine-readable code in the data information; wherein, the machine-readable code is set on the circuit board to be tested to identify the circuit to be tested Wiring on the board to be inspected.

Preferably, it also includes:

The optical scanning unit is specifically configured to search the coordinates of the machine-readable code according to the coordinate system to hit the current wiring to be detected; scan the circuit to be detected according to the coordinates of the test points of the wiring to be detected The current to-be-tested wiring of the board;

The judging unit is specifically configured to: when the scanned illumination feedback value is the preset illumination feedback value, the position of the current wiring to be detected at the coordinates of the test point is normal; the scanned illumination feedback value is not the preset illumination feedback value. When the illumination feedback value is preset, the current wiring to be detected is disconnected at the coordinates of the test point.

Preferably, it also includes:

The optical scanning unit is specifically configured to search the coordinates of the machine-readable code according to the coordinate system to hit the current wiring to be detected; scan the current wiring of the circuit board to be detected according to the coordinate group of the test point the wiring to be detected to the adjacent wiring to be detected;

The judging unit is specifically configured to, when the scanned illumination feedback value between the coordinate groups does not have the preset illumination feedback value, the current wiring to be detected is within a distance from the adjacent wiring to be detected. There is no short circuit between the coordinate groups of the test points; when the scanned illumination feedback value between the coordinate groups has the preset illumination feedback value, the current wiring to be detected and the adjacent wiring to be detected The detection wiring is shorted between the coordinate sets of the test points.

Preferably, it also includes an output unit, configured to judge whether the current wiring to be detected is disconnected at the coordinate position of the test point, and the distance between the current wiring to be detected and the adjacent wiring to be detected. The result of judging whether there is a short circuit between the coordinate groups of the test points, output scanning data or scanning graphics.

The beneficial effects of the present invention are as follows: by optically detecting circuit board wiring, accurate positioning of wiring defect positions is realized, and the yield rate and production efficiency of the production line are improved.

Description of drawings

FIG. 1 is a flow chart of the wiring detection method according to Embodiment 1 of the present invention;

2 is a schematic diagram of the wiring detection principle described in Embodiment 2 of the present invention;

3 is a schematic diagram of wiring detection feedback according to Embodiment 2 of the present invention;

Fig. 4 is a structural diagram of the wiring detection system according to the third embodiment of the present invention.

Detailed ways

The implementation process of the embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.

Embodiment 1 of the present invention provides a wiring detection method, as shown in FIG. 1 , the steps are as follows:

In step S101, a coordinate system and data information for testing are established in advance according to the gold plate, and the data information includes the coordinates of the test points used to detect the open circuit of the wiring, the coordinate group of the test points used to detect the short circuit between the wiring and the adjacent wiring, and Preset lighting feedback values for identifying wiring;

Step S102, according to the coordinate system, the coordinates of the test point and the light feedback value, optically scan the current wiring to be tested on the circuit board to be tested, and determine whether the current wiring to be tested is open at the coordinate position of the test point; and,

Step S103, according to the coordinate system, the coordinate group of the test point and the preset illumination feedback value, optically scan the current wiring to be tested to the adjacent wiring to be tested, and determine whether there is a short circuit between the current wiring to be tested and the adjacent wiring to be tested.

Preferably, a machine-readable code is set on the circuit board to be tested in advance, and the coordinates of the machine-readable code are stored in the data information, and the machine-readable code is used to identify the wiring to be tested on the circuit board to be tested.

Preferably, the steps of detecting the disconnection of the current wiring to be detected are as follows:

Find the coordinates of the machine-readable code according to the coordinate system to hit the current wiring to be detected;

According to the coordinates of the test points of the wiring to be detected, optically scan the current wiring to be detected of the circuit board to be detected, and when the scanned illumination feedback value is the preset illumination feedback value, the coordinates of the current wiring to be detected are normal at the coordinates of the test point; When the scanned illumination feedback value is not the preset illumination feedback value, the current wiring to be detected is disconnected at the coordinates of the test point.

Preferably, the step of detecting the short circuit between the current wiring to be detected and the adjacent wiring to be detected is as follows:

Find the coordinates of the machine-readable code according to the coordinate system to hit the current wiring to be detected;

According to the coordinate group of the test point, optically scan the current wiring to be detected of the circuit board to be detected to the adjacent wiring to be detected. When the illumination feedback value between the scanned coordinate groups does not have the preset illumination feedback value, the current wiring There is no short circuit between the coordinate groups of the adjacent wiring to be detected at the test point; when the lighting feedback value between the scanned coordinate groups has a preset lighting feedback value, the current wiring to be detected and the adjacent wiring to be detected are at the test point Short circuit between the coordinate groups.

Preferably, it also includes a judgment result based on whether the current wiring to be detected is disconnected at the coordinate position of the test point, and whether the current wiring to be detected and the adjacent wiring to be detected is short-circuited between the coordinate groups of the test point, Output scan data or scan graphics.

Preferably, the machine-readable code is a two-dimensional code or mask pattern that can be recognized by an optical detection device.

The beneficial effects of the present invention are as follows: by optically detecting circuit board wiring, accurate positioning of wiring defect positions is realized, and the yield rate and production efficiency of the production line are improved.

Embodiment 2 of the present invention, according to the method provided by the present invention, circuit board wiring is inspected, as shown in FIG. 2 , including: wiring to be inspected 1, machine readable code 2, defect 3 and defect 4. Defect 3 is an open circuit defect, and defect 4 is a short circuit defect.

Step 1, first establish the coordinate system and data information for testing according to the gold plate, the data information includes the coordinates of the test points used to detect the wiring break, the coordinate group of the test points used to detect the short circuit between the wiring and the adjacent wiring, and Preset lighting feedback value for identifying wiring. For the convenience of explanation, only a few test points are listed, among which, the coordinates of test points 11 to 14 are (30, 50), (50, 70), (95, 50) and (155, 50), and the test points The coordinates of 13 and test point 14 form the coordinate group (95, 50), (155, 50). At the same time, in the embodiment of the present invention, the light feedback value is the light reflection intensity value or the light transmission intensity value of the circuit board wiring. Conversely, the light reflection intensity value or the light transmission intensity value of the blank area other than the wiring in the wiring area can also be set. The intensity value is used as the detected illumination feedback value, which is similar to the method in the embodiment of the present invention, and examples are not repeated here.

It should be noted that the gold board is a circuit board without defects. In this scheme, it specifically refers to a substrate with no defects in the wiring area, which can be used as a standard substrate; the coordinate system is the unified coordinate system of the gold board and the circuit board to be tested, so Just can according to this unified coordinate system on the circuit board to be tested the coordinates of the starting position of detection and test point fast location; The coordinate group that is used to detect the test point of short circuit between wiring and adjacent wiring can comprise the coordinate of test point The abscissa and ordinate, the abscissa under the same ordinate, or the ordinate under the same abscissa. In the first case, the optical scanning process can be scanned along the line between two coordinate groups, for example, the coordinate group (200, 120) and (220, 140), at this time, the optical scanning is performed between the two coordinate points ; In the second case, if the ordinates are the same, the process of optical scanning can be scanned along the line parallel to the abscissa, for example, the ordinate is 120, and the abscissa group is (200, 220), at this time, in the ordinate is 120, and the abscissa is from 200 to 220 for optical scanning; in the third case, if the abscissa is the same, the optical scanning process can be scanned along a line parallel to the ordinate, for example, the abscissa is 220, and the ordinate group ( 120, 140), at this time, the abscissa is 220, and the ordinate is from 120 to 140 for optical scanning. Of course, the coordinate group can also be (200, 120) and (200, 140), or (200, 120) and (220, 120), at this time, the meaning of the data in the second and third cases is the same. Of course, in actual operation, it is necessary to unify the settings of the coordinate group. The above exemplified numerical values are all for illustration, and do not make any limitation to the solution of the present invention.

In this embodiment, the first case is used as an example, and other similar ways that can realize the present invention will not be repeatedly exemplified. Among them, the origin of the coordinates in the circuit board to be tested is O(0, 0), the machine-readable coordinates of the first wiring (0, -5), the machine-readable coordinates of the second wiring (65, -5), and the third The machine-readable code coordinates of the wiring (130, -5), the machine-readable code coordinates of the fourth wiring (195, -5), and the machine-readable coordinates of the fifth wiring (260, -5).

Step 2: Find the coordinates (0, -5) of the machine-readable code of the first wiring according to the coordinate system, and hit the first wiring.

Step 3, according to the coordinates (30, 50) of the test point 11 of the first wiring, the scanned light feedback value is not the preset light feedback value, so it is determined that the first wiring has an open circuit fault at the test point 11; according to the first The coordinates (50, 70) of the test point 12 of the first wiring, the scanned illumination feedback value is the preset illumination feedback value, so as to determine that the first wiring is normal at the test point 12.

Step 4. Find the coordinates (65, -5) of the machine-readable code of the second wiring according to the coordinate system, and hit the second wiring. At the same time, it can also be verified according to the coordinates (130, -5) of the machine-readable code of the third wiring. Is it possible to hit the 3rd wiring.

Step 5, according to the coordinate groups (95, 50) and (155, 50) of test point 13 and test point 14 of the second wiring, perform optical scanning from coordinates (95, 50) to coordinates (155, 50), scan All or part of the light feedback value obtained during the process is the preset light feedback value; therefore, it is judged that the second wiring and the third wiring are short-circuited between the test point 13 and the test point 14.

According to step 1 to step 5, the circuit board wiring shown in Figure 2 is scanned, wherein, according to the fixed ordinate increment, horizontally scanning the first wiring to the fifth wiring included in wiring 1 can be obtained as shown in Figure 3 The figure shown, where the part shown by the horizontal line is the wiring description feedback result, the blank column between the two horizontal lines is the blank area between two adjacent wirings in the circuit board, and the defects 3 and 3 are obtained as shown in Figure 3 Defect 4.

An embodiment of the present invention provides a wiring detection system, as shown in FIG. 4 , including:

The preset unit 301 is used to pre-establish a coordinate system and data information for testing according to the gold plate, and the data information includes the coordinates of the test points used to detect wiring breaks, and the test points used to detect short circuits between wiring and adjacent wiring The coordinate group and the preset lighting feedback value used to identify the wiring;

The optical scanning unit 302 is configured to scan the current wiring to be detected of the circuit board to be detected according to the coordinate system, the coordinates of the test point and the preset illumination feedback value; or, according to the coordinate system, the coordinate group of the test point and the preset illumination feedback value , scan the current wiring to be detected to the adjacent wiring to be detected;

The judging unit 303 is used to judge whether the current wiring to be tested is disconnected at the coordinate position of the test point; or is used to judge whether there is a short circuit between the current wiring to be tested and an adjacent wiring to be tested.

Preferably, the preset unit 301 is also used to pre-set the coordinates of the machine-readable code in the data information; wherein the machine-readable code is set on the circuit board to be inspected, and is used to identify the wiring to be inspected on the circuit board to be inspected.

Preferably, it also includes:

The optical scanning unit 302 is specifically used to find the coordinates of the machine-readable code according to the coordinate system to hit the current wiring to be detected; according to the coordinates of the test points of the wiring to be detected, scan the current wiring to be detected of the circuit board to be detected;

The judging unit 303 is specifically configured to: when the scanned illumination feedback value is a preset illumination feedback value, the position of the coordinates of the current wiring to be detected at the test point is normal; when the scanned illumination feedback value is not the preset illumination feedback value, The detection wiring breaks at the coordinates of the test point.

Preferably, it also includes:

The optical scanning unit 302 is specifically used to find the coordinates of the machine-readable code according to the coordinate system to hit the current wiring to be detected; according to the coordinate group of the test point, scan the current wiring to be detected of the circuit board to be detected to the adjacent wiring to be detected;

The judging unit 303 is specifically configured to: when the illumination feedback value between the scanned coordinate groups does not have a preset illumination feedback value, the current wiring to be detected and the adjacent wiring to be detected are not short-circuited between the coordinate groups of the test point; When the scanned illumination feedback value between the coordinate groups has a preset illumination feedback value, the current wiring to be detected and the adjacent wiring to be detected are short-circuited between the coordinate groups of the test point.

Preferably, an output unit 304 is also included, which is used to determine whether the current wiring to be detected is disconnected at the coordinate position of the test point, and whether the current wiring to be detected and the adjacent wiring to be detected are within the coordinate group of the test point. The result of the short circuit is judged, and the scan data or scan graph is output.

The beneficial effects of the present invention are as follows: by optically detecting circuit board wiring, accurate positioning of wiring defect positions is realized, and the yield rate and production efficiency of the production line are improved.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (11)

1. A wiring detection method, characterized in that the steps are as follows: The coordinate system and data information used for testing are established in advance according to the gold plate, and the data information includes the coordinates of the test points used to detect the disconnection of the wiring, the coordinate group of the test points used to detect the short circuit between the wiring and the adjacent wiring and preset lighting feedback values for identifying wiring; According to the coordinate system, the coordinates of the test point and the preset illumination feedback value, optically scan the current wiring to be tested on the circuit board to be tested, and determine whether the current wiring to be tested is open at the coordinate position of the test point ;as well as, According to the coordinate system, the coordinate group of the test point and the preset illumination feedback value, optically scan the current wiring to be detected to the adjacent wiring to be detected, and determine whether the current wiring to be detected is the same as the adjacent wiring to be detected. Detects short circuits between wires. 2. The method according to claim 1, wherein a machine-readable code is set on the circuit board to be detected in advance, and the coordinates of the machine-readable code are stored in the data information, and the machine-readable code is stored in the data information. The code is used to identify the wiring to be detected on the circuit board to be detected. 3. The method according to claim 2, wherein the step of detecting the disconnection of the current wiring to be detected is as follows: Finding the coordinates of the machine readable code according to the coordinate system, so as to hit the current wiring to be detected; According to the coordinates of the test points of the wiring to be detected, optically scan the current wiring to be detected on the circuit board to be detected, and when the scanned illumination feedback value is the preset illumination feedback value, the current wiring to be detected The position of the wiring at the coordinates of the test point is normal; when the scanned illumination feedback value is not the preset illumination feedback value, the current wiring to be detected is broken at the position of the coordinates of the test point. 4. The method according to claim 2, wherein the step of detecting a short circuit between the current wiring to be detected and the adjacent wiring to be detected is as follows: Finding the coordinates of the machine readable code according to the coordinate system, so as to hit the current wiring to be detected; According to the coordinate group of the test point, optically scan the current wiring to be detected of the circuit board to be detected to the adjacent wiring to be detected, when the scanned coordinate groups do not have the preset illumination feedback value , the current wiring to be detected and the adjacent wiring to be detected are not short-circuited between the coordinate groups of the test point; when the scanned illumination feedback value between the coordinate groups has the preset When the feedback value is illuminated, the current wiring to be detected and the adjacent wiring to be detected are short-circuited between the coordinate groups of the test points. 5. The method according to claim 3 or 4, further comprising judging whether the current wiring to be detected is disconnected at the coordinate position of the test point, and the connection between the current wiring to be detected and the As a result of judging whether the adjacent wires to be tested are short-circuited between the coordinate groups of the test points, scan data or scan graphics are output. 6. The method according to claim 2, wherein the machine-readable code is a two-dimensional code or a mask pattern that can be recognized by the optical detection device. 7. A wiring detection system, characterized in that, comprising: The preset unit is used to pre-establish a coordinate system and data information for testing according to the gold plate, and the data information includes coordinates of test points for detecting wiring breaks, and for detecting short circuits between the wiring and adjacent wiring. The coordinate group of the test point and the preset lighting feedback value used to identify the wiring; An optical scanning unit, configured to scan the current wiring to be detected of the circuit board to be detected according to the coordinate system, the coordinates of the test point and the preset illumination feedback value; or, according to the coordinate system, the test point coordinate group and the preset illumination feedback value, scanning the current wiring to be detected to the adjacent wiring to be detected; The judging unit is configured to judge whether the current wiring to be detected is disconnected at the coordinate position of the test point; or is used to judge whether there is a short circuit between the current wiring to be detected and the adjacent wiring to be detected. 8. The system according to claim 7, wherein the preset unit is also used to pre-set the coordinates of the machine-readable code in the data information; wherein the machine-readable code is set in the The circuit board is used to identify the wiring to be detected on the circuit board to be detected. 9. The system of claim 8, further comprising: The optical scanning unit is specifically configured to search the coordinates of the machine-readable code according to the coordinate system to hit the current wiring to be detected; scan the circuit to be detected according to the coordinates of the test points of the wiring to be detected The current to-be-tested wiring of the board; The judging unit is specifically configured to: when the scanned illumination feedback value is the preset illumination feedback value, the position of the current wiring to be detected at the coordinates of the test point is normal; the scanned illumination feedback value is not the preset illumination feedback value. When the illumination feedback value is preset, the current wiring to be detected is disconnected at the coordinates of the test point. 10. The system of claim 8, further comprising: The optical scanning unit is specifically configured to search the coordinates of the machine-readable code according to the coordinate system to hit the current wiring to be detected; scan the current wiring of the circuit board to be detected according to the coordinate group of the test point the wiring to be detected to the adjacent wiring to be detected; The judging unit is specifically configured to, when the scanned illumination feedback value between the coordinate groups does not have the preset illumination feedback value, the current wiring to be detected is within a distance from the adjacent wiring to be detected. There is no short circuit between the coordinate groups of the test points; when the scanned illumination feedback value between the coordinate groups has the preset illumination feedback value, the current wiring to be detected and the adjacent wiring to be detected The detection wiring is shorted between the coordinate sets of the test points. 11. The system according to claim 9 or 10, further comprising an output unit for judging whether the current wiring to be tested is disconnected at the coordinate position of the test point, and the current wiring to be tested A result of judging whether there is a short circuit between the detection wiring and the adjacent wiring to be detected between the coordinate groups of the test points, and outputting scanning data or scanning graphics.

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