How to identify the authenticity of electronic components? Professional testing organization for components

Date：2022-06-08 17:08:46Views：895

Components and parts are the core components of the circuit board. The quality of components and parts is directly related to the final quality of PCBA processing. There is a mixture of good and bad in the component market. How to avoid fake and inferior components is a necessary skill for a professional PCBA factory. Counterfeit components refer to electronic components with unknown source or quality defects. Counterfeit components are usually recycled components, cloned (imitated), overproduced, substandard, defective components and components with tampered description information. Such components will cause serious hidden dangers, and the tampered information in the chip may damage the function of the whole system.

Generally, the electronic components in the factory will be marked with three items of information in the blank of the components: manufacturer, component number and production date. It is a responsible attitude to indicate the manufacturer. Some companies directly print the English name of the company. In addition, some companies directly print the company's unique symbols to represent the manufacturer they produce. Further, they will print the manufacturer in which place they produce. The component number represents the unique specification and application specification of the component. In most cases, the components with the same number should be interchangeable. However, in some special cases, some hardware differences often lead to abnormal operation of the entire electronic circuit. It often takes a long time for researchers to see the reasons. Next, we will share with you several test methods that can be used to identify counterfeit electronic components in daily operations.

First, visual inspection

The easiest way to inspect counterfeit parts is by visual inspection. This includes checking the part numbers and screen markings on the components according to the specifications provided by the source manufacturer. In addition, you can use previous data and products purchased from suppliers to verify the validity of date codes. Other aspects of visual inspection are as follows:

Fraudsters may use black layers to place different part numbers and date codes on components. It consists of applying a thin black epoxy coating to the top of the part, and then roughening the surface to obtain the desired texture. It also includes matching the font to the original font. In order to determine if there is a power failure, it is important to check the top and surface texture of the component. In addition, it is necessary to compare the manufacturer's symbols with known original parts.

Before PCBA proofing, you should also check whether the leads of components are damaged, re tinned, etc. This is part of the incoming inspection. Due to the tight delivery time, it cannot be ignored.

Other factors to be considered in the equipment include component orientation, overall appearance, contact conditions, and visual inconsistencies.

Second, electrical test

The electrical test of counterfeit electronic components involves the verification of resistance and capacitance values and the full function analysis of active components. Various contract manufacturers (CM) and third-party test laboratories have electronic test facilities. In order to test complex products, expensive test setup and programming expertise are essential, which can only be implemented in OCM or some third-party laboratories. When major component exceptions are involved here, you can also apply to the source factory for evaluation.

Third, X-ray examination

X-ray inspection of hidden / internal characteristics of components. This method checks and verifies physical dimensions, lead frames, and connecting wires. In addition, it checks all components for any internal changes.

Fourth, XRF Technology

XRF stands for X-ray fluorescence spectrum. This technique determines the elemental composition of the material and is most suitable for verifying RoHS compliance.

The above contents are related to the identification of the authenticity of electronic components compiled by the core detection team. I hope they can help you. Shenzhen Chuangxin Online Testing Technology Co., Ltd. is a well-known professional testing institution for electronic components in China, with 3 standardized laboratories covering an area of more than 1000 square meters. The scope of testing services covers: testing and verification of electronic components, IC authenticity identification, material selection for product design, failure analysis, function testing, factory incoming material inspection, X-ray testing of components and parts, tape braiding and other testing items.