The reasonable selection of printed board size can make full use of the intermediate layer to set the shield, realize the nearby grounding better, reduce the parasitic inductance and shorten the transmission length of the signal.
A standard PCB looks something like this. Bare Board (with no parts attached) is also often referred to as a "Printed Wiring Board (PWB)".
The development level of printed circuit board industry can reflect the development speed and technical level of electronic industry in a country or region to some extent.
PCB board selection must meet the design requirements, mass production, cost balance. In short, the design requirements include both electrical and structural reliability.
No matter what work you are engaged in in the circuit board industry, if the circuit principle of electronic products is clear, you can improve the efficiency of functional testing and production efficiency of products. A trick takes you to understand the
The choice of surface treatment process mainly depends on the type of final assembly components; The surface treatment process will affect the production, assembly and final use of PCB board.
communication backplane, automotive board and other fields is relatively slow, while the HDI board, packaging board and soft board applied in high-end mobile phones, laptops and other "thin and short" electronic products will maintain rapid grow...
scheme selection, circuit design, circuit board design, structure design, component selection, production process, etc
There are many PCB surface treatment processes, the common ones are hot air leveling, organic coating, electroless nickel plating, gold dipping, silver dipping and tin dipping.
At present, no matter what kind of etching fluid is used, high pressure spray must be used, and in order to obtain a cleaner line side and high quality etching effect, the nozzle structure and spray mode must be strictly selected.
Needless to say, the PCB industry is facing increasing challenges and competition. But in trouble, lying flat can not save themselves, only fight, can be reversed.
This type of graphic plating is characterized by the presence of a copper coating only under the lead tin resist layer. Alternatively, the entire plate is coated with copper, with only tin or lead-tin resist outside the film