Date：2022-04-19 15:00:00

Recently, the Ministry of ecology and environment issued the notice on the key work related to the management of enterprise greenhouse gas emission report in 2022, and updated the power generation facilities of enterprise greenhouse gas emission accounting methods and reporting guidelines (revised version in 2022) in the form of an annex to the notice. View >>

Date：2022-04-19 14:16:00

The development of modern science and technology is based on integrated circuits. The most direct goal of integrated circuit development is to integrate more transistors in unit area or unit volume. Integrated circuit technology includes chip manufacturing technology and design technology, which is mainly reflected in the ability of processing equipment, processing technology, packaging and testing, mass production and design innovation. It is represented by the letter "IC" in the circuit. Most applications in today's semiconductor industry are silicon-based integrated circuits. View >>

Date：2022-04-19 14:00:00

Electromagnetic compatibility test EMC (electro magnetic compatibility) refers to the ability of equipment or system to meet the requirements in its electromagnetic environment and not produce intolerable electromagnetic interference to any equipment in its environment. EMC test includes two aspects: test the electromagnetic disturbance intensity sent to the outside world to confirm whether it meets the limit value requirements specified in relevant standards; The sensitivity test shall be conducted under the electromagnetic environmental conditions with specified electromagnetic disturbance intensity, so as to confirm whether it meets the immunity requirements specified in relevant standards. View >>

Date：2022-04-18 15:17:10

In the circuit, the components working in the state of high voltage, high current and high power undoubtedly bear great pressure and have great possibility of damage. At the same time, they are also the key components and functional components of the circuit. The core of electronic equipment is the circuit board, which is welded and assembled by various types of electronic components. If the equipment fails or has a short circuit, most of the reasons will be caused by the failure or damage of electronic components. How to check the quality of components? Share the skills of detecting the quality of circuit board components. View >>

Date：2022-04-18 15:13:50

The components damaged by overvoltage can not see obvious specific changes from the surface, but the parameters have changed. When it is more serious, the circuit board around the components turns yellow and black. Devices are the most easily damaged items, but their faults are regular. General faults are divided into two types: electrical parameter damage and physical damage. Then the damage of electrical parameters includes the damage caused by voltage and current exceeding the rated value. Physical damage includes fracture, deformation, resistance parameter change and other manifestations. What are the phenomena of component damage? The life of electronic components is not only related to its own structure and properties, but also closely related to its service environment and its role in the circuit. View >>

Date：2022-04-18 15:08:21

What does the meaning of halogen-free and halogen-free plates in PCB plates mean? To put it simply, halogen plates are not environmentally friendly, while halogen-free plates are relatively environmentally friendly. The simplest way is to slice them and analyze them. Halogen is a non-metallic element of group VII a, which includes five elements: Fluorine -, chlorine, bromine, iodine and astatine. Astatine is a radioactive element, and halogen is usually referred to as fluorine, chlorine, bromine and iodine. View >>

Date：2022-04-18 15:04:31

How does the factory detect the aging of electronic components? Aging, also known as "sophistication", refers to the continuous application of certain electrical stress to components under a certain ambient temperature and for a long time, through the comprehensive action of electrical and thermal stress to accelerate various physical and chemical reaction processes inside components and promote the early exposure of various potential defects hidden inside components, so as to achieve the purpose of eliminating early failure products. View >>

Date：2022-04-15 17:12:40

The enterprise applies for ISO quality management system, AAA enterprise credit, environment and occupational health management system certification in a third-party certification body. Many enterprises find that there is no CNAs mark on some certificates when they find a third-party organization for testing. So, is the certificate without CNAs invalid? What is the difference between a certificate with a CNAs mark and a certificate without a CNAs mark? View >>

Date：2022-04-15 17:07:00

When interconnected or close to each other, all electrical equipment or devices endanger each other, such as the influence between TV, GSM mobile phone, tape recorder and surrounding automatic washing machine or cable. The purpose of electromagnetic compatibility testability (EMC) is to control all such adverse reactions in an effective range. EMC measurement mainly includes test field and test instrument, which is one of the important indexes of product quality. View >>

Date：2022-04-15 17:04:17

XRF refers to the X-ray fluorescence spectrometer, which can quickly and simultaneously determine multiple elements. Under X-ray excitation, the inner electron of the tested element atom undergoes energy level transition and emits secondary X-rays (X-fluorescence). Observing and describing X-rays from different angles, XRF can be divided into energy scattering X-ray fluorescence spectrometer, abbreviated as EDXRF or EDX, and wavelength scattering X-ray fluorescence spectrometer, abbreviated as WDXRF or WDX, but EDX is widely used in the market. WDX is separated by crystal, and then the diffracted characteristic X-ray signal is received by the detector. View >>