At present, the PCBA processing and assembly of circuit boards are basically welded on the printed circuit board by soldering the electronic parts. This welding process can be achieved by SMT or wave soldering.
Pay attention to the wiring of signal lines under the magnetic beads, between the pads and those that may come into contact with the magnetic beads. Some magnetic beads conduct electricity quite well and may produce unexpected conductive paths.
Aluminum substrate and glass fiber plate difference and applicationFirst, glass fiber board (FR4, single-sided, double-sided, multi-layer PCB circuit board, impedance board, blind buried hole board), suitable for computer, mobile phone and other electroni
Patch processing manufacturers will determine whether to make solder paste steel net or red rubber steel net based on the component design of PCB board. Generally, if there are many plug-ins, wave soldering is required, red rubber net process will be used
Traditionally, we define PCB boards with more than 4 layers as "multilayer PCB boards", and more than 10 layers as "high multilayer PCB boards".
The optical method uses scanning to find defects in each layer, and the electronic test usually uses a flying probe to check all connections. Electronic tests are more accurate at finding short or open circuits, but optical tests can more easily detect in
in fact, no matter how to produce or design, ultimately can not be separated from the consideration of money, so should all the factors into the amount to make the final measurement standard to choose a suitable plate method.
Through the above five points of analysis, we should be able to find the cause of short circuit tinning of PCB board after wave soldering.
Original water tank - stainless steel booster pump - multi-media filter - activated carbon filter - precision filter - reverse osmosis host - pure water tank - water point
The battery of electric car can be said to be the most important, but many people do not care about it, but will complain about their electric car battery is not good, and the main reason is because of improper maintenance skills, resulting in premature b
Printed circuit board, also known as printed circuit board, printed circuit board, shortened to build and circuit board, often use English (PCB Printed circuit board) or write PWB (Printed wire board), printed with insulation board as the base material, c
he computer has the computer circuit board, the machine has the machine circuit board, a lot of electronic products are required to be equipped with the corresponding circuit board.
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