Date：2022-05-09 15:58:50

Welding process is an important measure to ensure welding quality. It can confirm the correctness and rationality of the welding process instructions prepared for various welding joints. Through the welding procedure qualification, check whether the service performance of the welded joint welded according to the proposed welding procedure instruction meets the design requirements, and provide a reliable basis for formally formulating the welding procedure instruction or welding procedure card. View >>

Date：2022-05-09 15:48:45

The basic requirement of electronic assembly for lead-free solder is a control requirement of electronic equipment for solder. The basic process of lead-free solder assembly includes: A. lead-free PCB manufacturing process; b. 96.5sn/3.5ag and 95.5sn/4.0ag/0.5cu eutectic and near eutectic alloy systems used in solder paste; c. 99.3sn/0.7cu eutectic alloy system for wave soldering application; d. 99.3sn/0.7cu alloy system for manual welding. Although these are feasible processes, there are still several major problems in the specific implementation, such as the cost of raw materials is still higher than that of the standard Sn / Pb process, the restriction on the wettability is increased, the requirement to maintain the inert air state (sufficient nitrogen) in the wave soldering process, and View >>

Date：2022-04-29 14:45:58

With the rapid development of science and technology and industrial production, people have higher and higher requirements for the quality of mechanical parts. Although the quality of materials and the precision of parts have been greatly improved, the early failure of mechanical parts used in various industries still occurs from time to time. Through failure analysis, it is essential to find out the failure causes and put forward effective improvement measures to prevent the recurrence of similar failure accidents, so as to ensure the safe operation of the project. View >>

Date：2022-04-29 14:23:36

Product inspection is an essential means of quality control in the production of modern electronic enterprises. It mainly plays the role of process control, quality control and judging the qualification of products. The product inspection shall implement the "three inspection" system combining self inspection, mutual inspection and full-time inspection. SMT packaging technology widely used in electronic packaging, new chip size packaging (CSP), solder ball array (BGA) and other packaging technologies require the direct realization of electrical and rigid mechanical connection between different materials through solder joints (mainly bearing shear strain). Its quality and reliability determine the quality of electronic products. View >>

Date：2022-04-29 14:20:00

Basic concept of failure analysis: failure analysis is of great significance to the production and use of products. Failure may occur at all stages of the product life cycle, involving product R & D and design, incoming inspection, processing and assembly, test screening, use and other links. Through the analysis of process waste products, early failure, test failure, pilot test failure and field failure samples, confirm the failure mode and analyze the failure mechanism, Clarify the causes of failure, and finally give preventive countermeasures to reduce or avoid the recurrence of failure. View >>

Date：2022-04-29 13:52:25

During the processing of electronic products, due to the complex processing and extensive use of component materials, both processing defects and component defects can be divided into obvious defects and potential defects. Obvious defects refer to those defects that make the products unable to work normally, such as short circuit / open circuit, and the potential defects make the products temporarily usable, but the defects will be exposed soon during use, and the products cannot work normally. Potential defects cannot be found by conventional inspection methods, but eliminated by aging methods. If the effect of aging method is not good, the potential defects that have not been eliminated will eventually appear in the form of early failure (or failure) during product operation, resulting in an increase in product repair rate and maintenance cost. View >>

Date：2022-04-28 15:05:44

Most of our electronic products now have microcontrollers or processors in their internal circuits. It can be said that they are single chip microcomputer or ARM chip. It can be said that the heart of the system of electronic products is the controller processor, so the internal program of the controller processor is the soul of electronic products. So, what does electronic product burning mean? What's the difference between offline burning and online burning? Come and have a look! View >>

Date：2022-04-28 14:58:13

The burning program is to be written on the memory. There is a set of solidified instructions on the chip. After starting, load the specified data and then start running. Similar to the BIOS of the motherboard, the condition to be met is that the chip can read the contents of the memory and has a storage device (which can write data), so that the program can be written according to the function of the chip. View >>

Date：2022-04-28 14:51:31

With the popularity of cars, more and more people have higher and higher requirements for the long-term reliability, stability and appearance of cars. The inspection of automobile parts is an important process in the process of automobile overhaul, which will directly affect the repair quality and cost of automobile. When testing these auto parts, X-ray testing equipment must be used. As one of the five conventional nondestructive testing methods, X-ray testing technology has been widely used in industry. View >>

Date：2022-04-28 14:36:53

Salt spray test is an important test to evaluate the corrosion resistance of products. It mainly uses the artificial simulated salt spray environmental conditions created by salt spray test equipment to evaluate the corrosion resistance of products or metal materials. In order to help you have an in-depth understanding, this paper will summarize the relevant knowledge of salt spray test. If you are interested in what this article will cover, read on. View >>