Date：2022-06-14 16:21:58

The solder products industry can be roughly divided into three categories: solder wire, tin bar and solder paste. These three types of products have different operation processes during welding, but they all have their own standard welding process flow and operation steps. If any step is not properly operated, it will lead to some poor welding phenomena, such as false welding and false welding. Today we will mainly talk about the phenomenon of false welding caused by improper welding, False soldering actually means that the solder joint appears to have been welded stably during the welding process, but actually it will fall off when it is touched. So what is the reason for the occurrence of false soldering? Let's analyze: View >>

Date：2022-06-14 16:19:00

RoHS directive originated in the European Union, with the rise of the production and use of electrical and electronic products (also known as EEE). Hazardous substances (such as lead and cadmium) may be released during the use, treatment and disposal of environmental electrical equipment, resulting in serious environmental and health problems. RoHS helps prevent such problems. It limits the existence of specific hazardous substances in electrical products, and safer substitutes can replace these substances. Let's take you to learn how to obtain ROHS certification? Detailed process introduction of IC product certification. View >>

Date：2022-06-13 15:42:36

What is the cause of faulty soldering in wave soldering? The appearance of wave soldering is characterized by rough granular surface, poor gloss and poor fluidity. In essence, any copper tin alloy layer with appropriate thickness is not formed on the brazed connection interface, which is called false soldering. To help you have a better understanding, the following contents are sorted out by Chuangxin testing network for your reference. View >>

Date：2022-06-13 15:37:29

With the development of electronic technology, surface mount components are more small and diversified, through-hole plug-in components are gradually reduced, and it is more and more difficult to weld through-hole components (such as components with large heat capacity or small spacing), especially for products with high reliability requirements. Selective welding is a new welding method. Compared with wave soldering, the most obvious difference between them is that the lower part of PCB is completely immersed in liquid solder in wave soldering, while in selective welding, only some specific areas are in contact with solder wave. Then, what are the process flows of PCB selective welding? View >>

Date：2022-06-10 16:00:00

Welding, also known as fusion, fusion, is a manufacturing process and technology for joining metals or other thermoplastic materials such as plastics by heating, high temperature or high pressure. People who have just come into contact often don't know what needs to be prepared and how to do it during the PCB welding process, which is what we often call the process flow. Here is a brief introduction to the process flow of circuit board welding: View >>

Date：2022-06-10 15:55:00

The failure cause analysis method shall identify all process characteristics and all variation sources of process characteristics in the cause analysis. However, the reasons for PFMEA in most factories are "illegal operation, failure to operate according to the operation instructions, new employees, operational errors, lack of training, lack of staff skills, poor raw materials, equipment damage, etc." while the preventive measures are "four major strengthening", "strengthening training, strengthening control, strengthening inspection and strengthening management". View >>

Date：2022-06-09 17:40:35

With the development of science and technology, especially the upgrading of electronic technology, the quality requirements for the components used in electronic equipment are becoming higher and higher. With the wide use of semiconductor devices, their service life is degraded and eventually leads to failure. A large part of electronic components work under extreme temperature and harsh environment, which makes them unable to work normally, and a large part of components stop in laboratories and wafer factories during R & D. In addition, improper use, surge and electrostatic breakdown are all the reasons that lead to the shortening of the service life of semiconductor devices. In addition, some devices that operate normally are also damaged, resulting in the degradation of components. View >>

Date：2022-06-09 17:16:59

It is mainly based on PCBA. Therefore, the research on the reliability of electronic assembly process is mainly based on the fault phenomenon on PCBA. View >>

Date：2022-06-08 17:17:57

Welding quality inspection refers to the inspection of welding results to ensure the integrity, reliability, safety and usability of the welding structure. In addition to the requirements for welding technology and welding process, welding quality inspection is also an important part of welding structure quality management. This article has collected and sorted out some materials, which are expected to be of great reference value to all readers. View >>

Date：2022-06-08 17:08:46

Components and parts are the core components of the circuit board. The quality of components and parts is directly related to the final quality of PCBA processing. There is a mixture of good and bad in the component market. How to avoid fake and inferior components is a necessary skill for a professional PCBA factory. Counterfeit components refer to electronic components with unknown source or quality defects. Counterfeit components are usually recycled components, cloned (imitated), overproduced, substandard, defective components and components with tampered description information. Such components will cause serious hidden dangers, and the tampered information in the chip may damage the function of the whole system. View >>