On-line detection device and method in strip-shaped FPC production

Abstract

The invention discloses an online detection device and method in strip-shaped FPC production. First and second movable adjusting rollers are used for carrying out deformation adjustment on the strip-shaped FPC so as to reduce deformation errors. The method is characterized by shooting an optical reflection image at a specific frequency by using a multispectral camera to obtain a finer surface image; and shooting a plurality of FPC images at the same time, comparing difference points, and comparing the difference points with an ideal model to realize surface detection. X-rays are arranged to detect internal and fine damages, and a plurality of detectors in an advancing direction of the FPC receive the rays at the same time and synthesize into a same image. In the invention, the multispectral camera is adopted to shoot a product surface optical image, the image shot by the multispectral camera in some special spectral bands shows clearer details, a problem that the shot image is not clear in the prior art is overcome, and accuracy of product defect detection is improved.

Description

technical field [0001] The invention relates to the technical field of optical detection and X-ray detection, in particular to an on-line detection device and method in the production of strip-shaped FPC. [0002] technical background [0003] Flexible printed circuit board (FPC), also known as flexible circuit board, has the advantages of light weight, thin thickness, high wiring density, and flexibility, and is widely used in various electronic devices. As the design of circuit boards becomes more and more complex and high-precision, the importance of defect detection in the manufacturing process of printed circuit boards is also increasing. At present, manual inspection or automatic optical inspection (AOI) is mostly used for defect detection of FPC. For example, the current method commonly used by AOI is to use the lighting system to illuminate the product to be tested, obtain the optical image of the product, and then detect the defect of the product by digitizing the o...

AI Technical Summary

Problems solved by technology

[0004] However, the design of circuit boards is developing towards high precision and high integration. The current detection equipment is facing a difficulty in keeping up with the production rate, and most of the optical detection methods are angle-resolution detection methods or color-resolution detection methods. These methods have higher requirements for imaging. High, it is difficult for these methods to obtain better detection results when facing some subtle parts

At the same time, most defect detection only stays on surface defects. If other defects need to be detected, the product needs to be transported, which reduces efficiency.

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