Printed circuit inspection device and method

Abstract

A printed circuit detection device includes: an object sensing unit for sensing whether a printed circuit is placed; an image capture unit for capturing image data of the printed circuit when a printed circuit is placed; an image analysis unit for Analyze the image data to judge whether the printed circuit meets the requirements; the display unit is used to display the test results of whether the printed circuit meets the requirements. Using the above-mentioned printed circuit detection device, unnecessary detection steps are avoided through electromagnetic wave induction, and the result of whether the printed circuit to be tested meets the requirements can be accurately and quickly obtained through electronic optical pickup and computer processing, and the detection time of the printed circuit is shortened. The invention also provides a printed circuit detection method.

Description

technical field [0001] The invention relates to a printed circuit detection device and method, in particular to an automatic printed circuit detection device and method. Background technique [0002] Gold finger (Connecting Finger) is the part on the printed circuit board that is in contact with the slot, such as the connecting part on the memory stick and the memory slot, the connecting part on the graphics card and the graphics card slot, etc. Signals are usually transmitted through the gold finger . Gold fingers are usually golden-yellow conductive contacts, which are called "gold fingers" because their surfaces are gold-plated and the conductive contacts are arranged like fingers. Such as figure 1 As shown, the contact components of the printed circuit board 10 are a plurality of gold fingers 20 arranged in a line. Gold finger 20 is a layer of gold coated on the copper clad board through electroplating or chemical plating. Gold has strong oxidation resistance and stro...

AI Technical Summary

Problems solved by technology

However, due to the high price of gold, currently more memory is replaced by tin plating. Since the 1990s, tin materials have become popular, but the name of gold finger is still used.

At present, the gold fingers of devices such as memory and graphics cards are mostly made of tin materials. Only the contact points of some high-performance servers / workstations will continue to use gold-plated methods, and the price is relatively high.

[0003] Electronic manufacturers need to use a variety of detection cards when testing electronic products, such as testing computer motherboards, such as network cards, graphics cards, sound cards and other detection cards with golden fingers. These detection cards need to be continuously tested during the detection process. Plugging and unplugging action, such frequent plugging and unplugging will inevitably cause wear and other physical damage to the golden fingers on the detection card

like figure 2 As shown, the gold finger 20 after repeated plugging and unplugging has obvious defects such as worn part 202, broken circuit part 204, spacing defect 206, line width defect 208, pinhole 210, and short circuit 212. These defects are found on the actual circuit board. some are very subtle

[0004] If the gold finger of the test card has the above bad conditions, the data transmission may be unstable or unable to transmit. When the computer motherboard is detected to be abnormal, the tester will not know whether there is a problem with the computer motherboard or the gold finger of the test card.

The usual method is to rely on the human eye and a magnifying glass to detect the wear and tear of the golden finger on the detection card, which is slow in detection speed and high in error rate

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