PCB News - Teach you to distinguish original IC and refurbished IC

Teach you to distinguish original IC and refurbished IC

In the process of research and development or learning, you often need to buy a small amount of films. At this time, you can only find goods in the electronic market. The goods on the market are mixed, and you must learn to distinguish between good and bad. Let me explain some of the faces of IC stocks. Some questions:

1. Polishing sheet

These chips are very similar to brand new films. The size, font, and depth of the printed text and patterns on the surface are basically the same. The batch number is also the same, but you will find many tiny parallel scratches on the surface of the chip, and the origin identification on the back is also different., The pins are generally not shiny, but matt, with traces of oxidation, and the pin spacing is relatively consistent. Generally speaking, the polishing film is mainly because the time of the new film is too long, or the batch number is more complicated. It is polished and printed into a uniform and relatively new production batch number for good sale.

2. Disassemble the machine piece

These chips are categorized after being removed from the circuit board. The pins obviously have traces of soldering, and they are shiny, and the spacing of the pins is obviously different. The size, font, and depth of the printed text and patterns on the surface are different, and the production batch number is different. Generally different, the origin identification on the back is more complicated. Baineng.com is a subsidiary of Qinji Group and is a leading electronic industry service platform in China. It provides online components, sensor procurement, PCB customization, BOM distribution, material selection and other electronic industry supply chain complete solutions, one-stop to meet electronics The overall needs of small and medium-sized customers in the industry.

3. Scatter new films

The size, font, and depth of the printed text and patterns on the surface of these chips are different. The production batch numbers are generally different. The origin identification on the back is more complicated, but there are no traces of used pins, but there are traces of oxidation. Generally speaking, this type of chip It is the trader who puts the unused chips collected from various sources in a tube and sells them.

4. Brand new film

The size of the printed text and pattern on the surface of these chips, the font, the depth, the production batch number, the origin identification on the back are very consistent, the pins are very neat, there will be a bright line in the middle of the matte surface, and the tube characters on the chip are very new and very transparent., Does not turn yellow.

The above is an introduction to how to identify original ICs and refurbished ICs. Ipcb is also provided to PCB manufacturers and PCB manufacturing technology