JPS62115889A - Inspection of v-cut-through in 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] [Industrial Field of Application] The present invention is directed to the presence/absence of cuts and
The present invention relates to an inspection method and a printed wiring board used to carry out the inspection method.

[Prior art and its problems]

Parts for OA equipment are required to be of high quality, low cost, and mass-producible. One of them is printed wiring boards.

When mass-producing this printed wiring board, conventionally, as shown in FIG.
After mounting the electrical components, the worker breaks the product by hand like a bar of chocolate to obtain the finished product.

However, since ■Cut 3 checks have traditionally been carried out only by visual inspection, when 50,000 pieces are produced, ■products with missing cuts, that is, ■products with wrinkled cuts, may be mixed in due to omissions in the check. be.

If this happens, not only will it be a hindrance to the work, but additional value and other parts will be wasted, which will hinder profitability.

Therefore, the present invention aims to propose an inspection method that can prevent V-cut check errors without increasing costs.

[Means for solving problems]

The present invention is a simple method that enables automatic inspection, and is as follows.

That is, in the present invention, an inspection pattern is provided in advance on the printed circuit board together with the main print pattern, and the inspection pattern is placed across the cut-out area, and after the cut is made, continuity between both ends of the inspection pattern is tested to ensure that the cut is not missed. This is a method of inspection.

In practice, this method only requires one inspection pattern for one cutting construction line, so only a small amount of printing material is required, and it can be applied at the same time as the main printing pattern is formed. It has the advantage of not increasing the number of steps and is easy to automate.

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

[Example] Fig. 2 is a perspective view of a printed wiring board used in the implementation of the present invention, in which 1 shows a main printing pattern 2 as in the conventional case, and furthermore, a button thank-you note was inspected so as to straddle the V-cut area X. This is a printed circuit board on which a pattern 4 for printing is provided in advance.

2) It goes without saying that the cut 3 is provided at the part X to be cut, as shown in FIG.

FIG. 3 is a diagram for explaining the method of (1) checking for missing cuts, in which the test needle 5 of the continuity checker is brought into contact with both ends of the test pattern 4.

As shown in Fig. 3(a), the inspection pattern 4 where the V-cut 3 is securely provided is broken, so non-conductivity is detected, and if the cut is missing as shown in Fig. 3(bl), Continuity is detected.

Therefore, by moving the test needle 5 up and down at a predetermined position and detecting whether the test pattern 4 is in a conductive state or a non-conductive state, it is possible to automatically detect (1) missing cut.

〔Effect of the invention〕

According to the present invention, since a V-cut omission prevention pattern (inspection pattern) is provided, it is possible to check the cut automatically instead of visually, which has a great effect on improving the reliability of the check and shortening the work time. be.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a conventional printed wiring board with a cut, FIG. 2 is a perspective view of a printed wiring board according to the present invention, and FIG. 3 is an explanatory diagram of a V-cut missing detection method. 1 - Printed circuit board 2 - Main printing pattern 3 - V cut 4 - Inspection pattern 5 - Inspection needle X - Cut section

Claims (2)

[Claims] (1) An inspection pattern spanning the V-cut area to be applied is provided in advance along with the main printed pattern on the printed circuit board, and after the V-cut is executed, continuity between both ends of the inspection pattern is tested to detect missing V-cuts. A method for inspecting V-cut omissions in printed wiring boards. (2) A printed wiring board characterized in that an inspection pattern spanning the V-cut area is provided on the printed circuit board together with the main printed pattern.