Guangzhou specializes in the destruction of electronic products: electronic finished products, PC motherboards, mobile SIM cards, motherboard scrap, chip and camera destruction, chip scrap and disposal, electronic motherboard scrap, electronic motherboard destruction, electronic product destruction, DVD, CD discs, disks, magnetic tapes, plastic cards, bank cards, IC cards, bank cards, ID card destruction, hard disk data confidentiality destruction. We have professional crushing equipment, fast destruction speed, good destruction effect, and provide on-site handling services.
Quality issues and consequences of refurbished components
The main quality issues that may exist when refurbishing counterfeit electronic components are as follows:
（1） The device itself has potential electrical damage.
（2） Leakage of sealing devices can cause chip corrosion or popcorn effect of plastic sealed devices
（3） Scrap or defective refurbished components with parameters exceeding the tolerance or chips with mechanical damage.
（4） The damage caused by the renovation process, such as laser marking after grinding causing damage and leakage of the pipe cap, high-temperature desoldering of used devices causing delamination of the sintered surface, and mechanical grinding of the surface of plastic sealed devices causing mechanical damage to the chip.
Some of the above issues can be found during product storage inspection or secondary screening, such as parameter deviation, leakage of sealing components, delamination of sintering surfaces, severe mechanical damage to chips, etc. And the potential for electrical damage to the device, chip corrosion Minor mechanical damage to the chip is not easily detected during inspection, but it may lead to fatal failure of the entire machine after installation. Therefore, it is necessary to use effective methods to identify batches of refurbished and forged electronic components, and eliminate their possibility of being applied in engineering practice.
2、 Refurbishment methods and identification of devices
There are various methods for refurbishing and forging electronic components, including commonly eliminating unused or removed components from waste products, devices with poor reliability but certain electrical properties, which appear after surface grinding, spraying, reprinting or labeling. Additionally, with the same functionality But products that are not from the same batch or manufacturer, after grinding and reprinting with the same batch number or smearing the manufacturer information, are often used as a means of refurbishing counterfeit components by impersonating products from the same batch or manufacturer. The identification of refurbished counterfeit electronic products should start from the following aspects: Identify the traces left by refurbishment and forgery methods; Identify the consistency of product layout, installation structure, and process methods from the same batch; Identify products based on whether they have been used or not.
1） Abnormal surface identification method
Most of the surface markings on electronic components are laser marked with clear handwriting, while refurbished components have blurry and non-standard handwriting or significant differences from the font. In addition, surface markings on devices generally have a certain significance The explanation of the meaning of surface markings can be obtained from the device manual or company website, so by carefully observing and distinguishing the surface markings of the device, counterfeit electronic components can be effectively identified.
2） There are obvious grinding marks on the surface of the device
Polishing is a necessary process for renovating plastic sealed components, and most refurbished parts can be observed with traces of polishing. The polished device will present a rough surface, and even if fine sand or polishing cloth is used for grinding, it cannot achieve the initial surface smoothness after injection molding curing By carefully observing the materials on both sides under a microscope or comparing them with the brand, it can be determined whether the device is refurbished or forged. In addition, refurbished plastic sealed components are generally treated with spray coating, and the surface can be lightly scraped with a knife. If it is a black strip-shaped object, the component has undergone spray coating treatment. If it is a gray flocculent object, it is a normal injection molding surface.
3） There are traces of the device being used
For refurbished devices that have been used, identify them based on the traces of use. For example, for devices that require screws for fixation, although refurbishment can re electroplate the surface of the device, it cannot restore the fixing holes.
4） Abnormal morphology at the end of device pins
The packaging process for normal plastic encapsulated devices is generally as follows: mounting → injection molding → labeling → high-temperature curing → electroplating → rib cutting/forming → visual inspection. According to the program, the external pins are first electroplated, and then the ribs are cut and shaped according to the requirements Therefore, there are exposed metal supports at the end of the pins after cutting the ribs. Refurbished devices require tin plating treatment on the surface of the pins, but due to the insufficient length of the pins, they cannot be further trimmed, resulting in a complete coating on the end section of the pins.
5） The origin identification of the same batch of devices is different
The same batch of products produced by a stable production line with the same or similar reliability information is called quality consistency, and products with the same batch number are given priority when purchasing components. In order to adapt to the above rules, refurbished components are usually made from different manufacturers Products with the same function are labeled as belonging to the same company, model, and batch for easy sales. Devices with the same normal batch number should have the same origin information, product layout, installation structure, and manufacturing techniques.
