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Failure cause analysis and application precautions of ceramic capacitor

Date:2022-01-17 14:46:50

Ceramic capacitors are made of high dielectric constant capacitor ceramics extruded into circular tubes, discs or disks as the medium, and silver is plated on the ceramics as the electrode by sintering infiltration method. The capacitor with small positive capacitance temperature coefficient is used in high stable oscillation circuit as loop capacitor and padding capacitor. Ceramic capacitors are easy to fail when used in inappropriate circuits. View >>

Damage discrimination and failure mode analysis of varistor

Date:2022-01-17 14:20:02

Varistor is a voltage limiting protection device. Using the nonlinear characteristics of varistor, when overvoltage occurs at its two poles, varistor can clamp the voltage to a relatively fixed voltage value, so as to protect the subsequent circuit. Varistors also play a very important role in transient overvoltage protection in circuits. Although its flow capacity is large, its energy capacity is not large. In addition, because its impulse current pulse width is far less than the actual pulse current width of large and medium-sized power semiconductor systems, short circuit, burnout and failure often occur. View >>

Incoming inspection standards for various electronic components (very detailed here)

Date:2022-01-17 13:31:00

The key work of electronic product development is the design of principle realization, component (material) selection, verification and testing, etc. Incoming inspection of components is a very important part and the source of quality management. As the saying goes, "everything is difficult at the beginning". Therefore, only by controlling the source, the subsequent production will be relatively easy. Select appropriate suppliers according to the function and processing technology of product parts to ensure the quality of parts and save costs. View >>

What does the burning program mean? What does PCBA burning program mean?

Date:2022-01-14 16:23:00

In the process of PCBA processing, in order to enable the PCB board to realize some specific functions, in addition to the hardware, there is also software, which needs to add the program of "burning" in the PCBA processing process, that is, to "carry" the program into the IC. Before starting "burning", we should test whether the PCB board is qualified, and then select the appropriate burning method. View >>

Fracture analysis method of metal materials for quality identification and testing of electronic products

Date:2022-01-14 16:01:14

Fracture analysis is a subject of studying metal fracture surface and an integral part of fracture subject. A pair of mutually matched fracture surfaces and their appearance obtained after metal fracture are called fracture. Metal fracture is a common identification item in quality identification. Through the analysis of fracture, we can help us make a comprehensive analysis of the quality of electronic products. So what are the fracture analysis methods for testing metal materials? View >>

What is the definition of FMEA? Three elements of failure mode analysis

Date:2022-01-14 15:57:10

Definition of FMEA: FMEA is a quantitative analysis using bottom-up method. It can be implemented in the design or process. It identifies weaknesses in the design or process. It starts from the low level (component level) of the product or process to the failure of the system or subsystem. It highlights the key characteristics of the system or subsystem. The main purpose of FMEA is to identify the potential problems that may affect the safety and performance of the system or product in the early design process, and introduce countermeasures to reduce or minimize the impact of the identified potential problems (failure modes). View >>

Application scope and safety precautions of NDT technology

Date:2022-01-13 16:06:18

Nondestructive testing is a test method to check the surface and internal quality of the inspected parts without damaging the working state of the workpiece or raw materials. The purpose of nondestructive testing is to improve the manufacturing process, reduce the manufacturing cost, improve the possibility of products and ensure the safe operation of equipment. Any industry with large physical equipment or infrastructure may use some kind of non-destructive testing. Nondestructive testing has been widely used in many important industries around the world. Now mainly introduce its application scope and safety precautions. View >>

Application of IC chip on-line X-ray nondestructive testing technology

Date:2022-01-13 16:03:39

In modern development, X-ray imaging technology has formed a relatively complete set of X-ray nondestructive testing technology system. "Nondestructive" as the name suggests, the test process will not damage the test piece. Its biggest feature is that it can test without damaging the material and structure of the test piece. Therefore, the use of nondestructive testing can implement 100% full product inspection to ensure production quality. This can be achieved by using Xray online detection technology, which can not only realize the detection of invisible solder joints such as BGA, but also conduct qualitative and quantitative analysis of the detection results, so as to find faults early. View >>

Introduction of eight common power management IC chips and detection methods

Date:2022-01-12 15:23:29

Power supply IC is an indispensable component of electronic equipment. If the power supply IC is damaged in the circuit, the electronic equipment will stop working. Therefore, it is necessary to make a correct judgment on the integrated circuit. Before testing the power IC chip, we need to master the purpose, internal structure principle and main electrical characteristics of the IC in the circuit, and analyze the internal electrical schematic diagram if necessary, so as to better judge and prove whether the device is damaged. So how should we detect the power chip IC? View >>

Chip working principle and function introduction professional third-party test report

Date:2022-01-12 14:00:00

Chip technology is the most important in the field of science and technology. Chip is just needed for any country. Chips are widely used in computers, mobile phones, home appliances, automobiles, and other electronic products and systems. Chips emphasize the integration, production and packaging of circuits. Chips are of great significance for scientific and technological innovation. Chips are everywhere and change our life all the time. No matter what equipment is inseparable from chips. Chips are mainly divided into memory chips, power chips and logic chips according to their functions, but the manufacturing process of chips is very complex, and the chip production line involves about thousands of processes. What are the working principles and functions of the chip? View >>