There are all kinds of IC chips on the market, and it is difficult to see the difference between the various materials without paying attention to the distinction, whether it is true or false, new or refurbished. In the IC procurement process, what worries buyers the most is not the price, but the quality of the product. The manufacturing process of the chip is very complicated, and the single crystal silicon produced by the complex process has to go through thousands of processes, and it is widely used. According to the Semiconductor Industry Association (SIA), U.S. chip companies lose $7.5 billion a year due to counterfeit products. If a defective chip were to be installed on a plane, car or medical device, it would be a matter of life and death.
We can judge from many aspects. For example, after we buy it back, we open the box and take out the chip. After taking it out, we carefully observe the printing on the chip. If it is a genuine product, the printing on the chip should be very clear and there will be no blurring, but if it is bought back, it is found that there are traces of friction or grinding on it, or it looks like that The printing is particularly bright and unnatural, so this may not be genuine. Then there is another way to judge whether it is genuine or not, and that is to see if there are some traces of Samsung in the pin of the chip. If it is not genuine, it is very likely that the pin of the chip looks particularly unnatural or the color is particularly uneven. This is very likely not authentic, otherwise it is very likely to be authentic.
Next, there is another way to judge, which is to look at the label of the packaging factory and its production date. If it is genuine or normal production, then its production time should be the same. If the production time is inconsistent, it will be There may be some problems. The last thing is to look at the thickness of this chip. If this chip has not been polished, its thickness should be very uniform and full, but if you buy a second-hand chip that has been polished instead of an authentic one, it is very likely that its thickness will be Make it thinner, because a certain thickness may have to be polished off when grinding, so use a vernier caliper to measure the thickness and then compare the size on the manual to judge whether it is genuine.
The appearance and size of some genuine and fake chips are almost the same. The identification of authenticity is summarized as follows:
1. Look at the positioning holes and observe that the positioning holes of the original products are relatively consistent. Some of the refurbished ones have different depths or are simply polished. If you look carefully, you can see the traces of the original positioning holes.
2. Look at the typing. Generally, the refurbished and re-typed (white characters) can be erased with "Tianna water" (chemical thinner), which are generally refurbished goods, and the original goods cannot be wiped off.
3. Looking at the lead angle, the pins of the original product are very neat and straight like a straight line, while some of the refurbished ones are not neat and a little crooked.