Date：2021-11-25 14:00:00

A connect the two probes (regardless of positive and negative) with the pins at both ends of the resistance to measure the actual resistance value. In order to improve the measurement, the measuring range shall be selected according to the nominal value of the measured resistance. Due to the nonlinear relationship of Ohm scale, the division of the middle section is relatively fine. Therefore, the pointer indication value should fall to the middle section of the scale as far as possible, that is, within 20% ~ 80% radian range at the beginning of the full scale, so as to make the measurement more accurate. View >>

Date：2021-11-24 16:12:26

At this stage, the market only cares about whether we can make chips. However, with the maturity of the chip industry, the future focus of the market is bound to be adjusted to whether we can manufacture chips efficiently. Although the market share of testing only accounts for 6% of the whole chip manufacturing industry chain, it is still a very important industry, and even directly related to the quality of chip finished products. A little carelessness will cause incalculable consequences. For a product, the market may pay more attention to its performance at the initial stage of listing, but in the long run, the long-term value of the product is still determined by its quality. View >>

Date：2021-11-23 15:09:25

With the development of the electronic market, chips are becoming smaller and smaller, and the carrier belt is also developing in the direction of precision. At present, there are 4mm wide carrier belts in the market. What does IC chip carrier mean? Chip carrier tape refers to a strip product applied in the field of electronic packaging. It has a specific thickness, and holes for holding electronic components and positioning holes for index positioning are equally distributed in its length direction. View >>

Date：2021-11-23 14:38:20

Why should enterprises conduct reliability testing on electronic products? What is the significance of reliability testing? The so-called reliability is the ability of the product to complete the specified functions under the specified conditions and within the specified time. In the process of design and application, the product continues to be affected by its own and external climatic environment and mechanical environment, but still needs to be able to work normally. Therefore, it needs to be verified with test equipment. This verification is basically divided into R & D test, trial production test There are three parts of mass production sampling inspection. In short, reliability refers to the ability to complete the specified functions within the specified time and under the specified conditions. View >>

Date：2021-11-23 14:32:02

Semiconductor reliability test is mainly divided into two major items: environmental test and life test. The environmental test includes mechanical test (vibration test, impact test, centrifugal acceleration test, outgoing line tensile strength test and outgoing line bending test), outgoing line weldability test, temperature test (low temperature, high temperature and temperature alternating test) Damp heat test (constant humidity and alternating damp heat), special test (salt spray test, mold test, low pressure test, electrostatic resistance test, ultra-high vacuum test and nuclear radiation test); The life test includes long-term life test (long-term storage life and long-term working life) and accelerated life test (constant stress accelerated life, step stress accelerated life and sequential stress accelerated life), some of which can be done selectively. View >>

Date：2021-11-22 13:15:34

Welding is a process in which the material of the workpiece to be welded (the same or different) is heated or pressurized or both, and the material of the workpiece is bonded between atoms with or without filling materials to form a permanent connection. Welding technology is an important metal processing technology developed at the end of the 19th century and the beginning of the 20th century. Because it has a series of technical and economic advantages, it has developed into an independent discipline and is widely used in aviation, aerospace, atomic energy, chemical industry, shipbuilding, electronic technology, construction, transportation and other industrial departments. View >>

Date：2021-11-22 13:03:36

Nowadays, the volume and weight of electronic products are shrinking, the products are becoming more and more diversified, the technical content is expanding, and the degree of intelligence is greatly improved. The reliability requirements for electronic products have become an important index to measure the quality of electronic products. A large number of various types of electronic components are used in electronic equipment, Equipment failures are mostly caused by the failure or damage of electronic components. Therefore, how to correctly detect electronic components is particularly important, which is also a skill that electronic maintenance personnel must master. View >>

Date：2021-11-22 11:50:00

When selecting solder varieties, we should not only care about the mechanical properties of the solder itself, but also care about the reliability of the welding formed by the solder. In fact, the mechanical properties of solder are not completely equal to those of welding, especially for lead-free welding. The welding formed by solder forms MC at the joint between solder and copper pad. For tin lead solder, the mechanical strength of MC is greater than that of solder itself. When impacted by external force, the fracture usually passes through the solder itself. At this time, large external force impact energy is required. The lead-free welding is different. Under high-speed impact, the fracture will appear at IMC, and with the increase of impact speed, the probability of fracture at IMC will increase, and only low external force impact energy is required. Therefore, people pay more and more attention to lead-free welding View >>

Date：2021-11-19 15:58:00

According to the requirements of the draft technical regulation on the restriction of hazardous substances in RoHS electrical and electronic equipment (notification No. g / TBT / N / Sau / 1166) issued by the Saudi Bureau of standards, measurement and quality (SASO) in December 2020, the content of hazardous substances in all electronic and electronic equipment and devices within the scope must meet the regulatory restrictions before they can be sold in the Saudi market. The final regulation was officially promulgated on July 9, 2021 and will be enforced on January 5, 2022. View >>

Date：2021-11-19 15:24:09

Recently, China National Accreditation Commission for conformity assessment (CNAs) adjusted the management mode of accreditation change. The relevant matters are hereby notified as follows: View >>