Date：2022-04-25 14:00:00

The development of electronic products in the direction of miniaturization, portability, networking and high performance puts forward higher requirements for circuit assembly technology and the number of I / O leads. The volume of the chip is getting smaller and smaller, and there are more and more pins of the chip, which brings difficulties to production and repair. Originally, Quad flatpack QFP was widely used in SMT, and the limit size of package spacing remained at 0.3 mm. The leads with this spacing were easy to bend, deform or break, which had high requirements for SMT assembly process, equipment accuracy and welding materials, and the defect rate of QFP with narrow assembly and fine spacing was up to 6000 ppm, which restricted the wide application. View >>

Date：2022-04-25 13:52:07

With the State Council printing and distributing the "14th five year plan" for the modernization of market supervision, improving the ability of quality certification services and strengthening the reform and innovation of recognition, inspection and testing have been raised to the national level, which focuses on the planning and construction of a number of high-level national quality inspection centers and testing laboratories. Recently, Anhui, Henan, Shanghai, Zhejiang, Guangdong, Shandong and other provinces have successively issued policies to reward and subsidize CNAs and CMA certification, up to one million. View >>

Date：2022-04-25 13:32:00

Announcement on Approving the issuance of 245 recommended national standards such as sand for construction and 2 amendments to national standards recently, China national standards Announcement No. 6 of 2022 was issued, and the State Administration of market supervision (National Standardization Administration Committee) approved 245 recommended national standards such as sand for construction and 2 amendments to national standards. View >>

Date：2022-04-24 15:02:08

As the core of information industry, integrated circuit industry is a strategic, basic and leading industry to support economic and social development and ensure national security. The volume of VLSI marked by silicon-based monolithic digital continues to shrink, and the circuit structure and manufacturing process are becoming more and more complicated. Its reliability is also affected by process errors and related factors. View >>

Date：2022-04-24 14:58:52

Certification, accreditation, inspection and testing is a basic system to strengthen quality management and improve market efficiency under the condition of market economy. It is an important part of market supervision. Its essential attribute is "delivering trust and serving development", which has the prominent characteristics of marketization and internationalization. It is known as the "physical examination certificate" of quality management, the "letter of credit" of market economy and the "pass" of international trade. View >>

Date：2022-04-24 14:53:44

By analyzing the composition of metal materials, we can understand the composition of materials, so as to monitor the product quality, analyze the products with problems, analyze the causes and eliminate hidden dangers. Metal materials are widely used in aviation, machinery, computer hardware and other fields. Generally speaking, metals are divided into pure metals, alloys, special metals and other types, but with the increasing demand for metal materials in various industries, there are more complex materials. The following is a share of metal material composition detection and analysis methods to better apply them to products. View >>

Date：2022-04-24 14:44:04

Polymer materials, as the name suggests, are materials based on polymer compounds. The polymer material industry should not only provide a large number of new products and materials with rapid changes for industrial and agricultural production and people's clothing, food, housing and transportation, but also provide more and more effective high-performance structural materials and functional materials for the development of high technology. The component analysis of polymer materials is a process of qualitative and quantitative analysis of unknown components of samples to be tested through a variety of separation technologies and various analytical instruments. Since the composition analysis of polymer materials is so complicated, it is very important to choose the appropriate analysis method. The following mainly introduces the composition detection and analysis methods of polymer materials for your reference. View >>

Date：2022-04-22 17:00:22

Optoelectronic devices are various functional devices made of photoelectric conversion effect, which can realize the functions of optical signal generation, signal modulation, detection, connection, energy switching, energy increase and decrease, signal amplification, photoelectric conversion, electro-optic conversion and so on. Generally, the products of most industries need to be tested for reliability, and the testing needs of each industry are also different. What reliability testing items should be done for most optoelectronic components? Here is a brief introduction for your reference. View >>

Date：2022-04-22 16:52:37

The device or measure to prevent the working medium from leaking out of the pump or to prevent external impurities or air from invading into the pump is called sealing. The sealed medium is generally liquid, gas or dust. Mechanical seal, also known as end seal, has a pair of end faces perpendicular to the rotation axis. Under the action of fluid pressure and compensating the external elastic force of machinery, the end face keeps fit with the other end and slides relative to the other end depending on the cooperation of auxiliary seal, so as to prevent fluid leakage. Mechanical seal failures are generally caused by leakage, wear and torque caused by abnormal changes. The main reasons for mechanical seal failure are as follows: View >>

Date：2022-04-22 16:40:11

Ceramic capacitor takes electronic ceramics as the dielectric material. It has the advantages of high service temperature, large specific capacity, good moisture resistance, small dielectric loss and wide selection of capacitance temperature coefficient. It is widely used in electronic circuits. However, with the extension of time, the dielectric aging phenomenon of ceramic capacitors will appear, which should be paid attention to in use. View >>