A special copper clad plate is used, and the surface of the copper platinum layer is pre-coated with a layer of sensitive material, so it is called "pre-coated sensitive copper plate", also known as "sensitive plate".
SMT welding has a close relationship with all aspects of the entire assembly process, and once welding problems occur, product quality will be affected and loss will be caused.
Special substrate printed circuit board Metal substrate (aluminum base, copper base, iron base or invar steel), ceramic substrate, according to its characteristics, use can be made of metal (ceramic) based single, double, multi-layer printed circuit board
the circuit board must be flame resistant, can not burn at a certain temperature, can only be softened. At this time, the temperature point is called the glass transition temperature (Tg point), and this value is related to the size and durability of the
Maintenance of spare printed circuit board. For the spare printed circuit board that has been purchased, it should be installed on the numerical control device regularly and run for a period of time to prevent damage;
At present, some manufacturers use non-contact machine vision inspection method for PCB board inspection, this technology because of the high speed and high precision of non-contact measurement and detection, has been trusted by these manufacturers, it ca
found a short circuit phenomenon. Take a board to cut the line (especially suitable for single/double board), after cutting the line, each part of the function block is powered separately, and gradually eliminated.
Through the above analysis of the parasitic characteristics of the hole, we can see that in high-speed PCB design, seemingly simple holes often bring great negative effects to the design of the circuit.
The production process and chemical solution of different PCB design manufacturers are still very different. Before the design of the wastewater treatment project, participate in the waste water diversion work of PCB board design and production, and verif
High frequency circuit PCB design is a complex process, involving many factors, may be directly related to the performance of high frequency circuit.
PCB, as the soul of China's intelligent manufacturing, determines the grade of electronic products, whether it is low-end or high-end. Today's IC technology replacement speed, manufacturers are doing everything possible to improve electronic products IC t
PCB assembly, do not apply any solder on the top or bottom pad. Use screws with built-in washers to achieve tight contact between the PCB and the metal case/shield or ground surface bracket.