PCBA processing to avoid PCB board warping method:1. Reduce the influence of temperature on plate stress; 2. Adopt high Tg plate; 3. Increase the thickness of the circuit board, 4. Reduce the size of the circuit board and reduce the number of pieces of th
The plug technology meets the following requirements :1. Copper can be found in the through hole, but the plug cannot be used for resistance welding. 2. There must be tin lead in the through hole, with a certain thickness requirement (4 microns). Do not a
Purpose and precautions of reserved process edge in PCB design: Reserved process edge is the part added on both sides or four sides of PCB board to assist patch plug-in welding, which is mainly to assist production and does not belong to the PCB board. It
Analysis of the deformation causes of PCB board in the process of processing: 1. Incoming material of copper clad plate: 2. Pressing: 3. Welding resistance, character and other baking process: 4. Hot air solder leveling: 5. Storage
PCB board test system will have a new design idea, the use of automatic test system based on USB bus and virtual instrument design idea, give full play to the role of the computer
new energy electric vehicles, module board, industrial control circuit board, medical circuit board, intelligent security PCB board, automotive electronic communication circuit board
The post-process can only be screened probabilistic through destructive experiments, and it is impossible to effectively analyze and monitor a single PCB board.
In the process of PCB board copying, since the circuit board needs to be split, the integrated circuit and other components are removed to make BOM list, and the bare PCB board is scanned and copied.
In the actual study, it is found that PCB design mainly has four aspects of interference: power supply noise, transmission line interference, coupling and electromagnetic interference (EMI).
There are many kinds of PCB substrates, but they are generally divided into two categories, namely inorganic substrate materials and organic substrate materials.
PCB board common bad reasons: 1, short circuit, 2, open circuit, 3, PCB board dark and granular contact, 4, PCB board solder joint into golden yellow, 5, environmental impact
The application of wave-crest welding technology and reflow welding technology are completely different in component layout design, PCB and pad graphic design and hole design.
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