The circuit board with devices on both sides should be taken into account the second time over reflux will be welded side of the side of the device off, serious will rub off the pad, destroy the circuit board.
The PCB board should be marked with the Mark point, the specific position: it can be a round or square pad on the diagonal of the board, and do not mix with the pad of other devices.
Two potential problems (black nickel and phosphorous rich layer) of PCB welding pad treated by ENIG and preventive measures
ENIG surface treatment circuit board is one of the biggest advantages of the circuit board production and manufacturing process is simple, in principle only need to use two kinds of chemical potion (electroless nickel plating and acid gold water) can be c
The PCB is then placed into the developer to remove unwanted solder masks so that the specified copper foil can be correctly exposed.
It can be seen that the coordination between welding aid and welding resistance pad design plays a decisive role in improving PCBA manufacturability and welding pass-through rate.
In the process of PCB high-speed signal circuit design and wiring, engineers need to shorten the lead between the pins of high-speed circuit devices as much as possible.
The molten solder diffuses along the surface of the welds with the help of capillary suction, forming the infiltration of solder and welds, firmly bonding the components and the printing board, and has good electrical conductivity.
In summary, by optimizing PCB design, using excellent solder to improve the solderability of circuit board holes and preventing warping to prevent defects, the welding quality of the entire circuit board can be improved.
Solder pad refers to the part of the board to be coated with green oil. In fact, the solder mask uses a negative output, so when the shape of the solder mask is mapped to the board, it is not green oil solder, but exposed copper. Usually in order to incre
The PCB assembly factory explains the type and assembly process of PCB welding, from bare board manufacturing to assembly and packaging.
Kingford is a PCB company engaged in the production and assembly of circuit boards. We not only sell PCBA, but also have many strategies related to PCB design and PCB proofing. Next, let me introduce you to some matters related to PCB.
PCB manufacturing, PCB design and PCBA processing manufacturers explain to you the conditions for 5G PCB welding and the reasons for copper rejection of PCB