Date：2022-05-12 15:16:03

DPA detection (destructive physical analysis) is the whole process of verifying whether the design, structure, material and manufacturing quality of components meet the requirements of the intended use or relevant specifications, sampling according to the production batch of components, dissecting the samples, and a series of inspection and analysis before and after dissection. It can determine whether there may be quality problems of component batches that endanger the use and lead to serious consequences. DPA technology is widely used in military and civil electronic components. It is of great significance in procurement inspection, incoming inspection and quality monitoring in the production process. View >>

Date：2022-05-12 15:12:04

Generally, a test report will be marked with CMA, CNAs and cal. What do these three marks mean respectively? In order to help you have an in-depth understanding, the following contents are sorted out by Chuangxin testing network for your reference. View >>

Date：2022-05-11 17:48:18

As a widely recognized international certification, ISO system certification is widely recognized all over the world. Among them, ISO9001 quality management system, ISO14001 environmental management system and ohasa18001 occupational health and safety management system are familiar to everyone! So what is the difference between with CNAs logo and without logo? Why do some enterprises need certificates with marks? How big is the role? View >>

Date：2022-05-11 17:43:19

CNAs international mutual recognition China's national accreditation system for conformity assessment plays an important role in international accreditation activities. Its accreditation activities have been integrated into the international recognition system and play an important role. View >>

Date：2022-05-11 17:30:00

As we all know, all products must have a certificate before they can be sold to consumers. From the initial model prototype to the hands of consumers, an important thing related to whether the electronic product can be delivered is to see whether the electronic product can pass the test of reliability test equipment. If electronic products want to get the certificate, they have to pass the test of reliability test equipment. The working principle of this reliability test equipment is to simulate the working environment of electronic products, let these electronic products test the working ability of high temperature and humidity resistance of these electronic products in different environments, such as high temperature and high humidity, and pass the test of these reliability test equipment, We can know the weakness of this type of electronic products View >>

Date：2022-05-10 17:56:00

We often see CMA and CNAs marks on some test reports. CMA measurement certification and CNAs laboratory accreditation are commonly used as certification for test reports. There are both similarities and differences between them. In order to help you solve this problem, this paper will summarize CMA measurement certification and CNAs laboratory accreditation. If you are interested in what this article is about to cover, you might as well read on. View >>

Date：2022-05-10 17:21:49

False soldering is the most common defect. In fact, it is a phenomenon that the product or effect is affected to some extent during the welding process because the details are not handled in place, resulting in the smooth welding on the surface. The emergence of this situation often means the failure of the product, so we need to take this problem seriously. Sometimes, after welding, it seems that the front and rear steel strips are welded together, but in fact they do not reach the degree of integration. The strength of the joint surface is very low. The weld has to go through various complex processes on the production line, especially through the high-temperature furnace area and high tension tension tension correction area. Therefore, the false welded weld is very easy to cause belt breakage accidents on the production line, which has a great impact on the normal operation of the production line. View >>

Date：2022-05-10 17:18:24

What is false soldering? It is generally caused by oxidation or impurities at the welding point, poor welding temperature and improper method. In essence, there is an isolation layer between the solder and the pin. They are not in full contact. The state is generally not visible to the naked eye. However, its electrical characteristics have no conduction or poor conduction, which affects the circuit characteristics. View >>

Date：2022-05-09 16:11:25

Components in electronic circuits are usually installed horizontally. Lead wires of electronic components shall be formed during installation. The forming of electronic component leads is mainly to meet the requirements of installation size and circuit board coordination. When forming the lead, it should be noted that the lead should not be bent at the root, and the fillet radius r at the bend should be greater than twice the lead diameter. The two bent leads shall be perpendicular to the component body and located in the same plane as the center of the component. View >>

Date：2022-05-09 16:05:28

Nowadays, in electronic assembly technology, people's awareness of environmental protection is becoming stronger and stronger. From the aspects of environmental protection, legislation, market competition and product reliability, lead-free is imperative. Lead free solder joints are polycrystalline eutectic. According to the principle of light diffusion, lead-free solder joints will not reflect light and show an "orange peel shape". In addition, the solidification of solder is accompanied by volume shrinkage, which is about 4%. Most of the volume shrinkage occurs at the last solidification of solder. View >>