The difference between them is that the core is thinner, the pp sheets of one or two layers and five or six layers are thinner, and there is a core board between the core board and the core board without copper foil on both sides, so generally this kind o
The characteristics of the gold process: the copper on the circuit board is mainly copper, copper solder in the air is easy to be oxidized, which will cause the electrical conductivity is to eat tin bad or bad contact, reduce the performance of the circui
The function of PCB design discharge teeth: in surge testing or ESD testing, the two ends of the common-mode inductor will produce high voltage, there will be a flying arc, if the distance is close to the surrounding devices, it may cause damage to the su
The role of PCB process edge: process edge is the part added on both sides or four sides of PCB board, mainly to assist the patch plug-in welding plate
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
Common heat dissipation mode of circuit board: 1, high heating device plus radiator, heat conduction plate, 2, through the circuit board itself heat dissipation, 3, the use of reasonable design to achieve heat dissipation function, 4, for the use of free
Soft and hard combined board PCB design points: 1, flexible area line design requirements, 2, dimensional stability, 3, covering film window design, 4, rigid flexible transition zone design, 5, flexible zone design with air-gap requirements
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.
In PCB processing and production, static electricity is not the hazard, the real danger lies in the accumulation of static electricity, and the resulting electrostatic discharge.
In the process of production, packaging and transportation, and the processing, debugging and testing of the integrated machine, it is inevitable to suffer from external or own friction and form a high surface potential.
How to route the key signals of PCB design: first, analog signal wiring requirements, second, high-speed signal wiring requirements, third, clock signal wiring requirements
SMT patch processing emphasizes fast and efficient production. General SMT patch workshops will carry out non-stop production. The shutdown and line change of machines will increase production costs and reduce profits.