JPH04102078A - Wiring board inspection device - Google Patents

Abstract

PURPOSE:To prevent re-inspection, inability of inspection, or damage to a wiring board by measuring deviation between a probe and an inspection position using a photo sensor and compensating for deviation with an inspection position. CONSTITUTION:A wiring board 1 is set to an inspection table 3 and a ground pattern 12 and a control part 62 of a control device 6 are connected. One inspection data is transferred from the inspection data storage part 61 to this control part 62 and a table 3 is transferred to coordinates of this inspection data. Then, a photo sensor 5 measures deviation between an inspection position 2 and a probe 4, compensates for coordinates of the inspection data if there is deviation and moves the table 3, and performs the same processing as in measurement of deviation. If there is no deviation, a control part 65 inspects a floating capacity CS between a wiring pattern 11 and a grounding pattern 12, indicates an error if it does not agree with the floating capacity of the inspection data, and then prints it out 63. Therefore, since the probe always comes into contact with inspection position, re-inspection and inspection inability are not required and there is no counter to areas other than the inspection position, thus preventing a wiring board from being damaged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wiring board inspection device that determines the quality of wiring patterns formed on a wiring board.

[Conventional technology]

2. Description of the Related Art As a means for determining the quality of a conductor wiring pattern formed on a wiring board, there is a method of inspecting conductor stray capacitance.

Conventional wiring board inspection equipment of this type fixes the position of the probe, moves the wiring board to a specified position, and then tests the stray capacitance between the wiring pattern and the ground pattern. The probe is brought into contact with the inspection position of the wiring board.

[Problem to be solved by the invention] In the above-mentioned conventional wiring board inspection apparatus, the probe may not come into contact with the inspection position due to problems with wiring board manufacturing accuracy, alignment accuracy, and wiring board movement accuracy. . In that case, it is necessary to perform the test again, and in some cases, the test may not be possible.

Furthermore, if the probe comes into contact with a location other than the inspection position on the wiring board, the wiring board may be damaged.

[Means to solve the problem]

A wiring board inspection device of the present invention is a wiring board inspection device that determines the quality of a wiring pattern formed on a wiring board, and includes a probe that contacts the wiring pattern to establish an electrical connection, and a probe to which the probe is designated for inspection. wiring board moving means for roughly positioning the wiring board so as to be close to the wiring pattern at the position; positional deviation measuring means for measuring the positional deviation between the probe and the inspection position using a photo sensor; positional deviation correction means for correcting the positional deviation by the output of the measuring means to ensure that the probe comes into contact with the testing position; and measuring the stray capacitance of the wiring pattern at the designated testing position with respect to the ground pattern through the probe. and determining means for determining the quality of the wiring pattern by checking whether the wiring pattern is a predetermined value.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a block diagram thereof. The wiring board inspection apparatus of this embodiment includes an inspection table 3 and a probe 4. As shown in FIG. The control device 6 includes an inspection data storage section 61, a control section 62, and a printing section 63.

A wiring board 1 is set on an inspection table 3, and a probe 4 is brought into contact with an inspection position 2 of the wiring board 1 to perform an inspection.

FIG. 3 is a flowchart showing the operation of one embodiment of the present invention. The operation will be explained using FIGS. 1 to 3.

The wiring board 1 is set on the inspection table 3, and its ground pattern 12 is connected to the control section 62 of the control device 6 (step 21).

Next, one piece of test data is transferred from the test data storage section 61 to the control section 62 (step 22).

Next, move the inspection table 3 to the coordinates of the inspection data (
Step 23).

Next, the photo sensor 5 measures the deviation between the inspection position 2 (the center of the pad of the wiring pattern 11) and the probe 4 (step 24).

Next, it is determined whether or not there is any deviation (step 25).
). If there is a deviation, the coordinates of the inspection data are corrected in step 26), the inspection table 3 is moved in step 23), and the processes from step 24 onwards are similarly performed. If there is no deviation, the stray capacitance (C3
) is performed (step 27), and if the stray capacitance of the test data does not match, an error occurs and the test data is printed in the printing section 63 (step 28).

Next, it is determined whether the inspection has been completed or not (two steps). If the examination has not been completed, the next piece of examination data is transferred from the examination data storage section 61 to the control section 62 (step 22), and the processes from step 23 onwards are similarly performed. When the inspection is completed, it is considered as the end.

〔Effect of the invention〕

As explained above, the present invention has the following effects by measuring the deviation between the probe and the inspection position using a photo sensor and correcting the deviation from the inspection position.

(1) Positioning before inspection does not need to be performed very accurately.

(2) Even if the wiring board manufacturing accuracy, positioning accuracy, and wiring board movement accuracy are compromised, the probe always comes into contact with the inspection position, so there is no possibility of re-inspection or failure of inspection.

(3) Since the probe does not come into contact with anything other than the inspection position on the wiring board, there is no chance of accidentally damaging the wiring board.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a block diagram of the embodiment of FIG. 1, and FIG. 3 is a flowchart showing the operation of the embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Wiring board, 2... Inspection position, 3... Inspection table, 4... Probe, 5... Photo sensor,
6...Control device, 11...Wiring pattern, 12...
Earth pattern, 61... Inspection data storage section, 62.
...control section, 63...printing section.

Claims (1)

[Claims] A wiring board inspection device that determines the quality of a wiring pattern formed on a wiring board includes a probe that contacts the wiring pattern to establish an electrical connection, and a probe that is placed close to the wiring pattern at a designated inspection position. a wiring board moving means for roughly positioning the wiring board; a positional deviation measuring means for measuring the positional deviation between the probe and the inspection position using a photo sensor; positional deviation correction means for correcting and ensuring that the probe comes into contact with the inspection position;
and determining means for determining the quality of the wiring pattern by measuring the stray capacitance of the wiring pattern at the designated inspection position with respect to the earth pattern through the probe and checking whether it is a predetermined value. Characteristic wiring board inspection equipment.