Date：2022-01-04 15:24:00

Component unsealing, also known as component cover opening and cap opening, is a commonly used destructive detection method in failure analysis. Generally speaking, that is to do surgery on the chip. Through unsealing, we can intuitively observe the internal structure of the chip. After unsealing, we can judge the current situation and possible causes of the sample in combination with OM analysis. View >>

Date：2022-01-04 14:38:00

Since each functional element has its own test requirements, the design engineer must make test planning at the early stage of design. Chip is the product of modern top high-tech technology. Chip exists in a variety of electronic products. The high integration of chip also makes the chip have more and more powerful functions. What tests does the chip need to do? It is mainly divided into three categories: chip function test, performance test and reliability test. The three tests for chip products to be listed are indispensable. View >>

Date：2022-01-04 14:00:39

Acetone, also known as dimethyl ketone, is the simplest saturated ketone. It is a colorless transparent liquid with a special pungent smell. It is easily soluble in water and organic solvents such as methanol, chloroform, ethanol, ether and pyridine. It is flammable, volatile and has active chemical properties. At present, the industrial production of acetone in the world is mainly based on cumene method. Acetone is mainly used as solvent in industry in industries such as explosives, rubber, tanning, plastics, grease, fiber and painting. It can also be used as synthetic ketene, acetic anhydride, iodoform Polyisoprene rubber, methacrylic acid, methyl ester, chloroform, epoxy resin and other important raw materials. View >>

Date：2021-12-31 16:39:18

Circuit board soldering has always been a common problem in the electronic industry. Due to the compact, complex internal structure and miniaturized shape of electronic products, ordinary testing instruments can not detect their internal defects. Therefore, it is difficult to solve the problem of how to effectively detect circuit board soldering. After many experimental studies, X-ray detection equipment has been recognized by more and more people, and its efficiency and effect of circuit board false soldering detection are both worry-saving and labor-saving. View >>

Date：2021-12-31 16:34:29

With the increasing demand for miniaturization of electronic equipment, there are more and more functions of a single chip. In the prior art, in order to ensure the quality of the chip, the process from design molding to mass production usually includes the chip detection stage. Integrated circuit, English is integrated circuit, abbreviated as IC; As the name suggests, it is a circuit with specific functions that integrates a certain number of common electronic components, such as resistors, capacitors, transistors, etc., as well as the wiring between these components through semiconductor technology. View >>

Date：2021-12-31 15:44:40

Most commonly used components are first packaged, then packaged, and then shipped to customers. The packaging method of surface assembled components has become an important link in SMT system. It directly affects the efficiency of assembly and production. It must be optimized in combination with the type and number of feeders of mounter. This paper has collected and sorted out some materials, and I hope this paper can be of great reference value to all readers. View >>

Date：2021-12-31 15:40:00

With the increasingly stringent requirements of society, laws and regulations on environmental protection and energy saving, the quality requirements of aluminum castings have also been improved. Therefore, the inspection of aluminum castings is paid more and more attention by manufacturers. Aluminum castings are widely used in many industries, including automobile industry, instrument industry, agricultural machinery, machine tool industry and so on. View >>

Date：2021-12-30 15:56:00

RoHS is the abbreviation of "restriction (use of certain) hazardous substances in electronic and electrical equipment". The initial abbreviation RoHS is used in EC Directive 2002 / 95 / EC. For the sake of clarity, major changes have led to the revision of EU provisions (EU RoHS) in 2011 / 65 / EU directive of June 8, 2011. For the delivery in China, There are similar requirements in GB / T 26572-2011 "concentration limit requirements for certain restricted substances in electrical and electronic products" (China RoHS). View >>

Date：2021-12-30 15:21:00

In order to adapt to the restriction requirements of new types of hazardous substances and the development of new detection technology in the electronic and electrical industry, and promote rohs2 0 detection technology development, while ensuring rohs2 0 the test results are consistent with the international ones, and China's rohs2 0 the working group initiated the revision of GB / T 26125-2011 and equivalent transformation of a series of standards revised and issued by IEC 62321 to support the implementation of the administrative measures for the restriction of the use of hazardous substances in electrical and electronic products and China rohs2 0 implementation of conformity assessment. View >>

Date：2021-12-30 14:08:53

Generally, the weldability of low carbon steel is better than that of other steels. And the lower the carbon content, the better. The higher the carbon content, the worse the weldability. The weldability of alloy steel depends on the different alloy elements added. Generally, the weldability of chromium containing steel is better than that of vanadium containing steel. It is of great help to the level 1 (IC packaging) and level 2 (electronic components assembled to printed circuit board) processes of modern electronic industry, which need high-quality interconnection technology and high-quality and zero defect welding process. View >>