Date：2022-08-11 18:30:52

RoHS is a mandatory standard formulated by EU regulations, and its full name is the directive on restricting the use of certain hazardous ingredients in electronic and electrical equipment. The revised standard was formally implemented on July 1, 2006. It is mainly used to standardize the material and process standards of electronic and electrical products, so as to make the products more conducive to human health and environmental protection. The purpose of changing the standard is to eliminate six substances in electronic appliances, including lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers, and focus on limiting the content of lead to no more than 0.1%. View >>

Date：2022-08-10 18:13:40

Connector forms and structures are ever-changing. There are various types of connectors with different application objects, frequencies, power, and application environments. Its function is to build a communication bridge between the blocked or isolated circuits in the circuit, so as to make the current flow and realize the predetermined function of the circuit. Connectors are indispensable components in electronic equipment. One or more connectors will always be found when observed along the current flow path. Then, what are the reliability test items of connectors? This paper has collected and collated some materials, and I hope that it can be of great reference value to all readers. View >>

Date：2022-08-10 18:11:05

Welding test piece and test piece inspection (1) the welding test piece must be carried out in strict accordance with the requirements and regulations of the process qualification scheme under effective supervision. (2) During the welding process, each step shall be carefully recorded by a specially assigned person, and a parameter recorder capable of saving the recorded data shall be provided for recording. The records shall be properly kept for approval. View >>

Date：2022-08-08 16:53:02

Any product will produce a small number of poor appearance more or less during production, and electronic components are no exception. Welding components with electric soldering iron is a basic assembly process, which plays a key role in ensuring the quality of electronic products. The components in various electronic products have their own characteristics, and the inspection contents shall be determined according to the specific requirements of each component. In order to help you have a deeper understanding, the following contents are organized by Chuangxin testing network for your reference. View >>

Date：2022-08-08 16:43:00

Temperature is an external representation of the motion energy (internal energy) of the internal molecules (atoms, electrons) of a substance. The higher the temperature, the more the irregular motion of the internal molecules of the substance is. The larger the temperature difference between the two objects, and the more the heat exchange between the two objects. Temperature test is an environmental test frequently carried out by quality and reliability engineers. If you want to do a good job in temperature test, you need to master a lot of knowledge. In order to help you understand deeply, this paper will summarize the relevant knowledge of temperature test. If you are interested in what this article is about to cover, read on. View >>

Date：2022-08-08 16:39:00

The core framework of LED chip is a semiconductor chip, which is composed of p-type semiconductor and n-type semiconductor. P-type semiconductor is dominant in the hole of the chip. When p-type semiconductor and n-type semiconductor are connected, a p-n junction will be formed. When the current acts on the semiconductor wafer through the wire, the electrons will be pushed to the P-region. In the P-region, the electrons and holes coincide and emit energy in the form of photons. This is also the working principle of the LED chip. The wavelength of light is also the color of light, which will be determined by the material of the p-n junction. The main material of LED chip is monocrystalline silicon. As the core component of LED light source, its quality determines the performance and reliability of products. Any improper use may damage the chip and cause the chip to fail during use. For application engineers, chip failure analysis View >>

Date：2022-08-05 15:40:18

Welding is a method of joining metals. It uses heating means to form a permanent and firm bond between the two metals through the mutual diffusion of atoms or molecules of welding materials on the contact surface of the two metals. Different welding objects require different working temperatures of electric soldering irons. When judging the temperature of the soldering iron head, the electric soldering iron can touch the rosin. If there is a "squeaking" sound when the soldering iron touches the rosin, the temperature is appropriate; If there is no sound, it can only melt the rosin, indicating that the temperature is low; If the soldering iron head smokes a lot when it touches rosin, it indicates that the temperature is too high. View >>

Date：2022-08-05 15:34:58

For engineers in the electronics industry, welding seems to be "easy", but in fact, there are many small ways. If you are not careful, you may cause the failure of the whole PCB board due to the error of a solder joint. Therefore, mastering the basic knowledge of welding and skilled use of relevant tools become the first step to do a good job in welding. The following describes in detail that when installing or replacing plug-in electronic components, soldering is mainly used to weld plug-in components. View >>

Date：2022-08-05 15:33:27

The detection of electronic components is not only an important link to ensure the normal operation of components, but also the most basic work. There are many kinds of components, and their working principles and technical characteristics are different. In practical work, different detection methods should be selected for different components. In the screening of electronic components, we should pay attention to quality control, overall consideration, scientific selection, simplified design, rational use of performance parameters of components, and give full play to the function of electronic components. Make reasonable selection according to favorable conditions, simplify the circuit design and improve the reliability, and reduce the rating to improve the reliability. View >>

Date：2022-08-03 18:05:44

At present, soldering technology is mainly used in the welding of electronic components. Tin welding uses tin alloy materials dominated by tin as solder. The solid solder wire is heated and melted by the heated electric iron, and then flows into the metal to be welded with the help of flux. Because the metal weldment and tin atoms attract, diffuse and combine with each other to form a wetted bonding layer, a firm and reliable welding point can be formed after cooling. In order to help you understand in depth, the following contents are sorted out by Chuangxin testing network for your reference. View >>