How to identify the authenticity of electronic components? Master these judgment methods to avoid buying fake goods

Date：2022-05-12 15:21:09 Views：1581

There are more and more refurbished materials for electronic components on the market. How to identify the authenticity of electronic components? Counterfeit components refer to electronic components with unknown source or defective quality. Nowadays, the proliferation of counterfeit electronic components has become a major pain point in the component industry. How to distinguish whether the purchased components are counterfeit? When we buy chips, we must be careful. Counterfeit components are usually recycled components, cloned (imitated), overproduced, substandard, defective components and components with tampered description information. Such components will produce serious hidden dangers, and the tampered information in the chip may damage the function of the whole system. Electronic component testing is the application of testing service industry technology in electronic information industry. It is an important link in the specific industrial chain of electronic components. The level of testing service technology is closely related to the quality of electronic components.

Recycling components

Recycled components refer to components that are discarded and scrapped after being manufactured and used in the equipment for a period of time. Discarded electronic products are collected and sold to buyers. They are disassembled into bare circuit boards, extracted components through rough process, and then classified, cleaned, marked and rewired. It is estimated that most counterfeit components fall into this category. Due to the use, aging and recycling process, components are usually seriously damaged.

Imitation and clone components

Imitation components and cloned components are components manufactured by imitation manufacturers rather than original manufacturers. They may be reverse engineered components that use pirated technology or intellectual property. Unauthorized manufacturers attempt to copy the original design, process and materials to achieve the same level of functionality as the original design. However, in most cases, the imitation components are inferior to the original components in all aspects, because the imitation manufacturer does not bear any responsibility for the quality or performance of its products, and will not improve through market feedback. In some cases, imitation components are manufactured under the license of OCM, but they will be marked and identified accordingly. Imitation components or cloned components are different from the original components internally and externally because they are produced and packaged in different manufacturing plants.

Overproduced components

Overproduced components are illegally manufactured by OCM's contract foundry. In some cases, the factory has the knowledge of manufacturing and manufacturing components through the contract, and has the knowledge of OCM. The foundry may overproduce parts by fabricating yield data, and then sell the excess chips to the market

Substandard components

Substandard and defective components come from unscrupulous manufacturers, who will sell defective parts that may pass the preliminary screening, because defects are unlikely to appear in the first few hours or months of the normal operation of the chip. But they will eventually fail. The performance of substandard parts is lower than the design specification (current, voltage, performance, temperature, etc.)

Overproduction and substandard and defective components are the same internally, because they may be manufactured by the same factory using the same process and materials. However, their appearance may be slightly different from the original components

Expired components

Expired components are old components sold as new components. They may be manufactured by OCM, but their tracking information and labels are forged. The "shelf life" of components is usually 18-36 months after production. Thereafter, the welding lead may produce an oxide layer, and its metal structure may change due to the reaction of intermetallic compounds in the lead alloy

From the internal point of view, expired components may be almost the same as Xinyuan components. However, by carefully observing the external pins of expired components, we may find the difference between the two.

As a purchaser of electronic components, I always need to be wary of purchasing fake and shoddy components, so here are some methods to judge the authenticity. I hope you can avoid buying fake products.

The first move: it depends on the supplier

Generally speaking, taking goods from agents will not be fake, but they may also encounter fake agents, so you can first check online or telephone to see their qualification certificates, or apply for some samples to test and confirm whether they are true. In addition, you can go to the office location of the agent for on-site investigation, and pay attention to their office address, official registration time, warehouse, etc. through these, you should have a preliminary judgment.

Second move: see whether the model is renovated after dismantling

This is a very common and crude method. These chips are removed from the used circuit board and then classified. The pins are obviously welded, shiny, and the pin spacing is obviously different. There are differences in the size, font and depth of the printed words and patterns on the surface. The production batch number is generally different, and the origin identification on the reverse side is relatively miscellaneous. These are basically easy to identify.

The third move: identify whether to polish the disc

The chip polished after disassembly is very similar to the whole new chip. There is basically no obvious difference in the size, font and depth of the external characters and patterns, and the batch number is basically the same. However, if you carefully observe the chip appearance, you will find that there are many small parallel scratches, and the origin marks on the reverse side are also different. The pins are generally not shiny, but matte, with traces of oxidation, and the pin spacing is basically the same.

Generally speaking, grinding discs are mainly new ones that are put too long or have complex batch numbers. In order to sell well, they are polished and printed into a unified and relatively new production batch number. There are some polished ones according to the original model, which are relatively good, but they are fake and shoddy products. Others are commercial grade to industrial grade, industrial grade to military grade, military grade to 883 grade, low rate to high rate, low frequency to high frequency, etc.

The fourth move: packaging

The self packaging of original products should be relatively high-end. When encountering this kind of chip, we can only rely on experience, but not all packaging can be done in China. It's not experienced, so it's not very easy to distinguish.

Fifth move: font

These chips have different thickness, font and depth of printing ink and patterns. The production batch numbers are generally different. The origin identification on the back is more miscellaneous, but the traces of unused pins are oxidized. Generally speaking, this kind of chips are sold in one tube by commercial merchants who collect unused chips from various ways.

The above are several identification methods. I hope they can help you. Shenzhen Chuangxin Online Testing Technology Co., Ltd. is a well-known professional testing organization for electronic components in China. It has three standardized laboratories with an area of more than 1000 square meters. The scope of testing services covers: testing and verification of electronic components, identification of IC authenticity, product design, material selection, failure analysis, function testing, factory incoming material inspection, X-ray testing of components, tape braiding and other testing items.