PCB Technical - HDI PCB circuit board

At present, electronic equipment used in various electronic equipment and systems still uses PCB printed circuit boards as the main assembly method. Practice has proved that even if the circuit schematic design is correct and the printed circuit board is not properly designed, it will adversely affect the reliability of electronic equipment. For example, if two thin parallel lines of the printed board are close together, it will cause a delay in the signal waveform, and reflection noise will be formed at the end of the transmission line. Therefore,

when designing PCB printed circuit boards, it is recommended that grounding is an important method to control interference. If the grounding and shielding can be properly combined and used, most of the interference problems can be solved. The ground structure of electronic equipment roughly includes system ground, chassis ground (shield ground), digital ground (logical ground), and analog ground. Before inspecting the PCB board, understand the working principle of the integrated circuit and its related circuits. HDI PCB circuit board

A PCB circuit board is an electronic product. A capacitor is a device used in electronic circuits to store energy and charge. They consist of one or more pairs of conductors separated by insulators. Generally, they are used in electronic filters to prevent unwanted frequencies and noise, are suitable for various applications, and help stabilize the power supply and maintain a stable voltage during the process. Nano Dimension said its capacitors can be used for radio frequency transmission lines, audio processing, radio reception and power circuit adjustment. The company tested 3D printed capacitors with different sizes, and each capacitor reportedly passed statistically verified data to prove consistent results. Repeatability testing of 3D printed capacitors shows that the difference between components is less than 1%. The results are based on more than 260 tests, using 30 different 3D printed capacitor sizes. Of course, if the market price of Tianjin professional circuit board is grid copper clad, these ground connections will affect the appearance, if you are careful, delete it.

The circuit board is an electronic product. The preliminary preparation includes the preparation of component libraries and schematic diagrams. "If you want to do well, you must first sharpen your tools." To make a good board, in addition to designing the principles, you must also draw well. Before proceeding with PCB design, we must first prepare the schematic SCH component library and PCB component library. The component library can use Peotel's own library, but it is generally difficult to find a suitable one. It is better to make your own component library based on the standard size data of the selected device. In principle, do the PCB component library first, and then do the SCH component library. The PCB component library requirements are high, which directly affects the installation of the board; the SCH component library requirements are relatively loose, as long as you pay attention to the definition of the pin attributes and the corresponding relationship with the PCB components. PS: Pay attention to the hidden pins in the standard library. After that is the design of the schematic diagram, and when it is done, it is ready to start the PCB design.

Under the condition of mastering the operating technology of the digital programming instrument, first install the negative film and compare it with the drilling test board, measure its length and width two deformations, and lengthen or shorten the hole position according to the deformation amount on the digital programming instrument. After lengthening or shortening the hole position, the drilling test board should be adapted to the deformed negative film, eliminating the troublesome work of cutting the negative film and ensuring the integrity and accuracy of the graphics. Call this method "change hole position method". For a newly designed circuit board, debugging often encounters some difficulties, especially when the board is relatively large and there are many components, it is often impossible to start. But if you master a set of reasonable debugging methods, debugging will get twice the result with half the effort. Use EMC filters and all IC-related filters should be connected to the local 0V reference plane. Honesty in processing circuit boards

From the chaser to the forefront, 5G has given China a historical opportunity to catch up and surpass in the field of mobile communications. HDI PCB circuit board

A circuit board is an electronic product. Any printed line on the PCB can function as an antenna. The length and width of the printed line will affect its impedance and inductance, thereby affecting the frequency response. Even printed lines that pass DC signals can couple to radio frequency signals from adjacent printed lines and cause circuit problems (and even radiate interfering signals again). Therefore, all printed lines that pass AC current should be designed to be as short and wide as possible, which means that all components connected to the printed lines and other power lines must be placed very close. The length of the printed line is proportional to its inductance and impedance, and the width is inversely proportional to the inductance and impedance of the printed line. The length reflects the wavelength of the printed line's response. The longer the length, the lower the

frequency at which the printed line can send and receive electromagnetic waves, and it can radiate more radio frequency energy. According to the current of the printed circuit board, try to increase the width of the power line to reduce the loop resistance. At the same time, make the direction of the power line and the ground line consistent with the direction of the current, which helps to enhance the anti-noise ability. Grounding is the bottom branch of the four current loops of the switching power supply. It plays a very important role as a common reference point for the circuit. It is an important method to control interference. Therefore, the placement of the grounding wire should be carefully considered in the layout. Mixing various groundings will cause unstable power supply operation. HDI PCB circuit board