How to identify original IC and refurbished IC?
In the process of R&D or learning, we often need to buy a small number of films. At this time, we can only find goods in the electronic market. The goods on the market are mixed. We should learn to distinguish between good and bad. Let me explain some problems faced when buy IC:
1.Grinding IC
These chips are very similar to new films. The size of the printed text and graphics on the surface, the font, the depth and the depth are basically the same, the lot number is the same, but when you look closely at the chip surface, you will find many tiny parallel scratches, and the origin of the back is different. The pins are generally not shiny, but matt, with traces of oxidation, and the pitch of the pins is relatively uniform. Generally speaking, the polishing film is mainly placed in a new film for too long, or the batch number is relatively mixed. In order to sell well, it is polished and printed into a unified new production batch number.
2. Disassembled IC
These chips are categorized after being removed from the circuit board. The pins are obviously solder-welded, bright, and the pitch of the pins is obviously different. The size of the printed text and pattern on the surface, the font, the depth and the depth are different, and the production batch number Generally not the same, the origin of the back is more mixed. Baineng Network is a subsidiary of Qinji Group. It is a leading electronic industry service platform in China. It provides components, sensor procurement, PCB customization, BOM distribution, material selection and other electronic industry supply chain solutions. The overall needs of small and medium-sized customers in the industry.
3. Bulk New chips
The size and font of the printed characters and patterns on the surface of these chips are different.printed characters and patterns on the surface of these chips are different,but the production batch number is generally different. The origin label on the back side is quite mixed, but the traces of the pins are not used. However, there are traces of oxidation. Generally speaking, this chip is a non-used chip that traders collect from various channels. Sold in a tube.
4. Brand new Chips
The size of the printed characters and patterns on the surface of these chips, the font, the depth, the production lot number, the origin of the back are very consistent, the pins are very neat, the matt surface is bright in the middle, the tube is very new and very transparent. , not yellowing.
