Date：2024-12-17 17:52:50

The testing projects that our company often does include appearance, x-ray， What testing items do you need to do for opening the lid, functionality (electrical performance), ultrasound, etc? What kind of effect do you want to achieve? View >>

Date：2024-12-17 17:52:48

Sure, the items for authenticity testing include appearance inspection and opening the lidAppearance testing: According to relevant testing standards, determine whether the chip is brand new, whether there are refurbishment marks (such as secondary coating, re tinning of pins, etc.), oxidation, and other conditionsOpen lid testing: destructive testing to check for the presence of wafers inside, wafer size, manufacturer's logo, copyright year, wafer code, in order to determine the authenticity of the chip. If there is no manufacturer's logo, an original sample needs to be provided for comparison View >>

Date：2024-12-17 17:52:47

Functional testing mainly tests whether the key functions of the chip can be achieved, and the testing parameters are selected according to the type of chip. Refer to the official specifications and conduct key functional tests, only testing within 1-3 parameters, depending on the model. If there are specified parameters, please inform us in advance View >>

Date：2024-12-17 17:52:45

The main function is to test key parameters to see if they meet the requirements of the specification book. Electrical performance is to test whether there are open circuits or short circuits in the pins. Based on the pin function, determine whether there are abnormalities in the IV curve pins. Functional testing is more comprehensive than electrical performance testing. If the electrical performance test passes, the function may not necessarily pass View >>

Date：2024-12-17 17:52:44

Programming testing: erase, program, verify, erase, empty check. Programming testing is functional testing, mainly targeting chips such as memory and microcontrollers View >>

Date：2024-12-17 17:52:43

It depends on the degree of oxidation. In general, if there is oxidation, it is recommended to conduct further solderability testing to see if the soldering degree of the pins meets the standard View >>

Date：2024-12-17 17:52:42

Our company has both CNAS and CMA certifications, and the reports are authoritative and legally binding View >>

Date：2024-12-17 17:52:40

Both are non-destructive tests. X-ray is used to detect the internal structure and wiring of materials, mainly inspecting the internal wafers, bonding wires, substrates, bonding materials, and plastic packaging materials of chip packaging. At the same time, it can also detect various abnormal phenomena such as wafer cracks, bonding material voids, bonding material climbing height, bonding wire curvature, plastic packaging material foreign objects, module internal component tilting and welding, ESD damage, etc. At the same time, it can detect the consistency between the original sample or good product and the ordinary sample.Ultrasonic waves are mainly used to detect delamination, cracking, voids, and adhesion at different interfaces inside the sample packaging. They are often used to detect defects at various interfaces inside the chip packaging (between Die, Lead, Paddle, Sub surfaces and plastic packaging interfaces) View >>

Date：2024-12-17 17:52:39

PCB development: PCB development is mainly aimed at power supply chips, which are easily affected by peripheral circuits. Using ordinary breadboards for testing is prone to errors, and they are also susceptible to the influence of ordinary sockets. Therefore, specialized PCB boards and customized test sockets are needed to reduce errors caused by peripheral devices and ensure the accuracy of test results View >>

Date：2024-12-17 17:52:27

Insulation resistance testing is an important part of electrical equipment and electronic component testing. Its main purpose and commonly used methods are as follows:Main purpose1. Evaluate insulation performance:-Test the resistance value of insulation materials to evaluate their insulation performance under working conditions, ensuring that they can effectively isolate current and prevent leakage.2. Prevent leakage and short circuit:-Ensure that the insulation layer can effectively prevent leakage and short circuit when the equipment operates at high voltage, thereby ensuring the safety and reliability of the equipment.3. Check for aging and damage:-Through regular testing, identify aging, cracks, or other damages in insulation materials for timely maintenance and replacement.4. Ensure safety:-Before putting electrical equipment into use, confirm that its insulation resistance meets safety standards to ensure the safety of operators and equipment.5. Compliance with standards and specifications:-Ensure that the insulation performance of the equipment meets relevant industry standards and regulatory requirements to avoid accidents caused by poor insulation.common method1. Megohmmeter test:-Use a megohmmeter (insulation resistance tester) for testing. During testing, connect the two test wires of the megohmmeter to the phase and ground wires of the device under test, apply a certain test voltage (usually 250V, 500V, or 1000V), and read the insulation resistance value.2. DC voltage test:-Apply a direct current voltage to the tested insulator, measure the leakage current through the insulator, and calculate the insulation resistance. The formula is:   \[   R = \frac{V}{I}   \]Among them\ (R) is the insulation resistance\ (V \) is the applied voltage\ (I \) is the leakage current.3. AC voltage test:-In some cases, AC voltage can be used for insulation resistance testing, especially when testing certain special equipment. However, AC testing is usually less common and reliable than DC testing.4. Time testing for insulation resistance testing:-During the testing process, a time test can be conducted to record the changes in insulation resistance over time. This can help identify the aging trend of insulation materials.5. Impact of environmental conditions:-Conduct tests under different environmental conditions (such as temperature and humidity) to observe changes in insulation resistance and evaluate the impact of the environment on insulation performance.matters needing attention-Test voltage selection: Choose an appropriate test voltage to ensure that the tested equipment is not damaged.-Testing environment: Conduct testing in a dry and dust-free environment to avoid external factors affecting the test results.-Safety protection: During insulation resistance testing, ensure the safety of operators and follow relevant safety regulations.Through these testing methods, the insulation performance of electrical equipment can be effectively evaluated, ensuring its safety and reliability in practical use. View >>