Wiring is generally divided into three levels: one is the layout, which is the most basic requirements of PCB design, the second is to meet the electrical performance, which is the standard to measure whether the circuit board is qualified. Three is beaut
Polygon filling deviation usually occurs when polygon plating copper on multi-grid circuit boards. While it does not have a standard based on a single grid, it can provide service beyond the required life of the boards.
Width and spacing of printed wire are important design parameters, which affect not only the electrical performance and electromagnetic compatibility of PCB board, but also the manufacturability and reliability of PCB board.
The effect of horizontal perforation electroplating in machining multilayer circuit boards is far inferior to that of vertical perforation electroplating.
he system speed can be greatly reduced because of the increase of delay time caused by the delay of 2ns per 30cm line length of the common interconnect on the baseboard. Image shift register synchronization counter.
The deformation of the circuit board (PCBA board) usually comes from the rapid temperature rise and rapid temperature drop (thermal expansion and cold contraction) caused by Reflow。
usually in the process of high-speed PCB design, the seemingly simple holes usually bring great negative effects to the circuit design.
The cost calculation of PCB industry is the most special and complex in all industries. From opening, platen, forming, to FQC, packaging, completion and warehousing.
in fact, repair maintenance cost greatly increased at the same time, customer brand affected, It doesn't pay off in the long run.
the temperature reproducibility can be obtained through multiple tests, so as to systematically evaluate the performance of the press.
Electrical testing is a very important link in the PCB board manufacturing process, the purpose is to check whether the PCB board is open and short circuit problem, to ensure that the finished products in line with the customer's electrical performanc
For electronic equipment, a certain amount of heat will be generated during work, so that the internal temperature of the equipment will rise rapidly.
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