Six strokes teach you to identify fake chips
The first move: to see the supplier
If you are looking for an agent, then the possibility of a fake product is much smaller, but there are also counterfeit agents sometimes. So the best way is to confirm it on the official website or by phone. To see if the manufacturer has agents in the area. If it is not an agent, but in some other places, if it is a company but the office space is simple, it should be vigilant; if the registration time is less than 1 year, be vigilant; if even a special website or an enterprise mailbox is not available, Be vigilant; then ask questions: see if they understand the product itself? Such as brand, package, level, type, characteristics, etc., can issue VAT and so on. There should be a preliminary judgment through these.
The second measure: see if the model is disassembled and refurbished.
This is a very common and relatively crude method. These chips are removed from the used circuit board and then classified. The pins are obviously soldered, bright and shiny, and the pitch between pins is obviously different. There are differences in the sizes, fonts, and depths of printed text and designs. Production lot numbers are generally not the same. This is basically a good identification.
The third measure: to determine whether to polish the film.
After dismantling and grinding the chip, it is very like a brand new piece. There are basically no differences in the sizes and fonts of the characters and patterns on the outside, and the lot number is basically the same. However, if you look closely at the appearance of the chip, you will find many tiny parallel scratches. The opposite of the origin of the logo is not the same, the pins are generally not bright but the traces of matt oxidation, pin spacing is basically the same.
In general, the polishing film is mainly a time when the brand new film is too long or the batch number is relatively complicated. After being polished, it is printed into a relatively new production batch number. There are some polished models of this type that are fairly good, but they are inferior products. There are also commercial grade industrial grades, industrial grade grades, military grades 883 grades, high rates of low rates, high frequencies of low frequencies, and so forth. The purpose of the change is obvious, but there is nothing more than a day-to-day business. If you can buy it, you can use it.
The fourth measure: domestic foreign brands.
Now many domestic products are similar to foreign products. This is a fake and shoddy product, but it can be used, but some performance indicators may not reach the requirements of these are mainly discrete devices, active devices, connectors, connectors. . And life is relatively short.
The fifth measure: Defend the package.
The original product's self-encapsulation should be relatively high-end, and the experience of this kind of chip is only based on experience, but not all of the packages can be done domestically. It is not an old buyer, and it is not very well distinguished.
Sixth trick: debate the font.
Scattered tablets These chips generally describe the size, type, and depth of printing inks and patterns. Production batch numbers are generally not the same, and the origin of the back logo is more complex. However, the traces that were not used on the pins are traces of oxidation. For this type of chip, commercial vendors sell unused chips collected in various ways in a single tube.
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