Look at the product packaging. The packaging of the original product can be identified from the label, brightness, etc.
Look at the product. You can look at the target on the product, the date of delivery, the brightness of the foot (new and old) and so on.
Due to the large number of IC models, in the R & D production process, often some new material number need to buy samples or small batch procurement, although the quality of the agent is good, but the quantity is too small generally do not want to take care of you, unless there is a spot and you come to pick up, if the futures may not be able to reach the minimum order quantity, and the delivery time may be too long for you to accept, applying for samples is not easy Thing. The products on the electronic market are mixed, and purchasing friends need to polish their eyes to find goods. It is best to find a few honest companies for long-term cooperation, so as to ensure the quality of some. The following introduces several commonly used new and original differences for reference:
1. Remove the machine
These chips are removed from the circuit board and then classified, the pins obviously have traces of solder welding, shiny, the pin spacing is obviously different, the size of the printed text and pattern on the surface, the font, the depth of the difference, the production lot number is generally not the same, the origin identification on the back is more complex, this kind of chip quality is very poor, the price is cheap, there may be many are broken, the defect rate is higher.
2. Sanding sheet
These chips are very much like new pieces, the size of the printed text and pattern on the surface, the font, the depth of the basic no obvious difference, the lot number is the same, but carefully observe the surface of the chip you will find that there are many small parallel scratches, the origin identification on the back is not the same, the pins are generally not shiny, but matte, there are traces of oxidation, the pin spacing is more consistent. This kind of chip should be careful, it may be very old goods refurbished, it may be the batch number is not unified to be unified, it may be replaced. The ones that are polished are the ones that are mixed or used and reconditioned. There are also many bad businesses to sell original goods, deceive buyers, and kill people.
3. Unwind the new film
The size, font, and depth of the printed text and pattern on the surface of these chips are different, the production lot number is generally different, the origin identification on the back is more complex, but the pin has no traces of use, but there are traces of oxidation, generally speaking, this chip is the trader collected from various ways of the unused chip in a tube to sell. This kind of chip quality is general, the price is moderate, and the manufacturers with low requirements can choose.
The size, font, depth, production lot number of the printed text and pattern on the surface of these chips, the origin identification on the back is very consistent, the pin is very neat, there will be a bright bright in the middle of the matte surface, and the tube type installed on the chip is very new, very transparent, and not yellow. This kind of chip has good quality and high price, so it is recommended to use this kind of chip. The quality is guaranteed.
It is not that you can buy genuine products if you know these, and the technology of fraud in the electronic market is becoming more and more powerful. It's better to find two or three long-term partners. That way the quality can be guaranteed.
And if you need anything, you can call me