How to distinguish the authenticity of fake chips? Third party testing organization for components

Date：2022-01-11 15:00:00 Views：1893

Due to the lack of supervision system and the huge profits of fake goods, the phenomenon of making and selling fake products is more rampant, and more and more fake chips pour into the market. There are many high-level swindlers in the IC chip market. You know, the finished products produced by fake chips may bring significant income, health and safety problems. As a component distributor, we should maintain the market order, ensure the normalization of product channels and eliminate counterfeits. This paper collects and sorts out the relevant materials to distinguish the authenticity of fake detection chips. It is expected that this paper will have great reference value to all readers.

There are many kinds of fake chips. Due to this phenomenon, a large number of IC terms have appeared in the domestic IC market: bulk new goods, refurbished goods, original word and original foot goods, and new original goods.

1. Original packaging

Counterfeiting of domestic packaged goods: it is difficult to identify. There are still some differences in outer boxes, labels and packaging only through comparison. Fake original packaging: compare whether the label is different from the original label, and the batch number on the label shall be consistent with that on the chip.

2. Original

The original packaging has been opened or there is no original packaging, but it is the original goods. Now many goods in the electronic market are such original goods;

3. San Xin

Scattered innovation in the real sense; Scattered new sub chips that are shoddy are chips that are eliminated from the IC assembly line due to internal quality problems and fail to pass the test of the design manufacturer. Or the chip (defective product) that is also eliminated due to the damage of the chip appearance caused by improper packaging. Fake scattered new goods (i.e. renovated goods) many businesses in the electronic market often call renovated goods scattered new goods.

4. Refurbishment

In the real sense, one kind of refurbished goods is second-hand goods refurbishment, and the other is to repair the appearance of the film by readjusting or plating the pins because the pins have not been used for a long time or the pins are crooked due to oxidation or bumping.

Through the above phenomena, the methods to identify the authenticity of IC chips are as follows:

Appearance inspection: optical microscope is usually used for appearance inspection to check whether the coplanarity of the chip, surface printing, device body and pins meet specific requirements.

x-ray inspection : X-ray fluoroscopy is a nondestructive inspection method, which can observe the internal structure of the object from multiple angles. Through X-ray perspective, check whether there are physical defects in the grain, lead frame and gold wire inside the enclosure of the tested device.

Acetone wipe test: acetone wiping is to regularly wipe the silk screen on the front surface of the chip with a certain concentration of acetone. The result is used to judge whether the chip surface is reprinted.

Unsealing and capping test: unsealing and capping is a physical-chemical test, which dissolves the epoxy resin colloid on the outer surface of the chip and retains the complete grain or gold wire, so as to check the important marks, layout, process defects, etc. on the grain surface.

Lead free testing: use SEM / EDS to detect the pins or terminals of parts to confirm whether they contain lead, and provide test data and reports.

Electrical test / function test: use IV curve tracker and probe table to test the curve of IC pins and gold wires after unsealing, including mass production test, open short circuit test and leakage current test.

In short, the best way to avoid the risk of counterfeit goods inflow is to purchase components from authorized formal channels as far as possible, and take photos of each batch of purchased products for retention. Today, with such a high level of counterfeiting, it is difficult for even the engineers of the original factory to distinguish the true from the false with the naked eye. In general, experienced original engineers may see the difference between real and fake products through familiar packaging methods and bar codes, but to really determine whether it is a fake chip, they have to rely on advanced laboratory instruments.

The above is the related content of "identifying the authenticity of fake detection chips" brought by the core creation test. I hope it will be helpful to you. We will bring more wonderful content in the later stage. Our testing services include: electronic component testing and verification, IC true and false identification, product design and material selection, failure analysis, function testing, factory incoming material inspection, tape braiding and other testing items. Warmly welcome to call, we will serve you wholeheartedly.