Common chip counterfeiting methods
Left: before the chip is opened, the IC screen print is k9k1208u0a-yib0, 64M;
Right: after the chip was opened, it was found that the chip was k9f5608u0a, 32m.
Tailings or bulk materials of the original manufacturer: the original packaging has been disassembled or there is no original packaging, but the product function and yield may be low due to storage time or processing process;
Scrap or defective products reported by the original factory: mainly products that have not passed the factory inspection, such as scrap after reliability test, poor packaging quality, test defective products, etc;
Refurbishment of original materials: refurbished goods, second-hand goods refurbishment;
Examples of counterfeiting:
1、 Appearance inspection: confirm the silk screen information, coding rules, appearance dimensions, reliability report and PCN (EOL) of the specification. Observe and compare the appearance.
The relative position of the letter "R" in the figure should be low, and the printing of genuine materials should be aligned
Fraudulent use of trademarks and packaging: materials produced by informal manufacturers use the trademarks and packaging of formal large manufacturers.
Refurbishment of fake goods: reprocess the recycled e-waste, such as grinding surface, pulling feet, plating feet, connecting feet, grinding words, typing, etc., into new materials. (processing the appearance of the chip makes the chip look more beautiful and even achieves the level of false truth. Some even include vacuum bags, label making, foam, carton and other processes).
Examples of counterfeiting:
Through comparison, it is found that the aeroflex} IC in the figure above is actually an IDT chip.
There is a large stain on the surface of the material in the figure.
The grinding trace on the surface of the material in the figure is obvious.
2、 Screen printing erasure test (MPT test): the screen printing of counterfeit products is reprocessed. If the screen print can be erased by MPT test, it indicates that the material is counterfeit.
The item in the drawing is not marked after MPT test. It is a fake item
3、 Screen printing erasure test (MPT test): the screen printing of counterfeit products is reprocessed. If the screen print can be erased by MPT test, it indicates that the material is counterfeit.
The materials in the figure are also products with ATMEL on the surface, and the function of bad products is invalid.
After decap of the item in the figure, it is found that the bad product is actually catalyst.
4、 X-ray inspection: check die size and position, number and position of wires, etc.
As can be seen from the above figure, X-ray # found that the chip on the right is indeed die, which is a scrap
5、 Electrical / function test: test the electrical parameters and functions of materials and parts according to the product specification.
It is better to obtain golden samples for comparison test by using the above means.
In conclusion, different identification methods achieve different degrees.
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