As the PCB surface welding type to lead-free conversion, circuit board welding temperature rise under ultra-high, thermal shock resistance of the surface resistance welding layer demand is higher and higher, to end surface treatment and resistance welding layer (film) ink, cover of peel strength, and the adhesion strength of the base copper demand is higher [...]
In recent years, SMOBC method and graphic electroplating method are two typical processes for the manufacture of double face metallized printed circuit boards. Process traverse method is also used in some specific situations. 1. Graphic plating process flow Foil sheet -- -- -- -- > > cutting benchmark percussive drill hole -- -- > CNC [...]
Printed circuit board (PCB) is a key element of product success. For electronic equipment, PCB is essential - by using circuits and copper wiring to connect different components to each other, PCB gives the equipment a long life. These factors are influenced by physical plate constraints such as size, material, layer and plane, and connectivity. [...]
In recent years, 3D X-ray fluoroscopy imaging and detection technology has been rapidly developed and gradually developed into a necessary detection method for the manufacturing industry of highly integrated electronic devices. Three-dimensional perspective X-ray imaging detection technology compared with traditional 2 d imaging X-ray detection of X - RAY, it can reproduce the measured all-round [...]
Buried, blind, through - hole technology buried, blind, through - hole combination technology is also an important way to improve the printed circuit density. In general, buried and blind holes are tiny holes. In addition to increasing the number of wiring on the board, buried and blind holes are interlayer interconnection with "nearest", which greatly [...]
PCB, which is a printed circuit board, is often referred to as a hard board. It is the supporting body of electronic components and is a very important electronic component. PCB generally USES FR4 as the base material, also known as hard board, can not be bent, flexure. PCB is generally used in some places [...]
An automatic test system for assembling circuit boards is also an on-line static test equipment for circuit boards, also known as ICT/ATE/ATS/MDA test in the industry! ICT(In-circuit Test System), commonly known In Chinese as online Circuit Test instrument (here refers to the assembly Circuit Test instrument), is mainly used for the assembly Circuit board (PCBA) [...]
Testing whether the IC is burned out or short circuit requires professional knowledge. Generally, people without such knowledge and skills can make some simple judgments by carefully observing the appearance of IC: whether the IC surface has burned marks, such as blobs, cracks, discoloration and so on. IC pin break, unsolder. Does IC have burnt [...]
What are the products that need PCB's in our life? The first is electronic products requiring integrated circuits: In order to save space, make the products lighter, more durable, and achieve good performance, these electronic products must eliminate the previous wire connection and switch to printed circuit boards. PCB meets the requirements of space, performance [...]
IPC-ESD-2020 Joint standard for electrostatic discharge control program development. Including the design, establishment, implementation and maintenance of esd control program. Based on the historical experience of some military and commercial organizations, this paper provides guidance for the treatment and protection of esd sensitive period. IPC-SA-61A After welding half water into the cleaning manual. Includes all [...]