The cleaning process needs to consume energy, manpower and cleaning materials, especially the waste gas, waste water discharge and environmental pollution caused by cleaning materials, which has become a problem that must be paid attention to.
Mixing process is in the PCB board A side has a number of IC components, and inserted with through hole components, on the other side of the PCB (B side) and there are many patch resistance capacitance electrical parts, sometimes IC, often called "mi...
Flexible printed circuit board is composed of flexible substrate (PI/PET), copper foil and binder. It is widely used in consumer electronic terminal products, such as smart phones, tablets, personal medical devices and so on.
Due to the different heat capacity and heating conditions of pad and pin, the temperature to which pad and pin are heated during reflow welding is also different. If the temperature difference is relatively large, it may cause poor welding.
There are two important concepts in IPC-SM-782, "Producibility Levels" and "Component Mounting Complexity Levels", which are different but have corresponding three levels.
Surface mount technology is very convenient in the manufacture of many PCBS. Reliable and fast professional tools handle installation to ensure that there is no room for human error while speeding up the process.
Common treatment methods are added sewing capacitor and bridge :1, sewing capacitor, 2, bridge, 3, multi-layer wiring, 4, lead bending less, the better, 5, the shorter the better, 6, lead layer alternating less, the better, 7, pay attention to parallel cr
There are the following factors affecting PCB welding quality: PCB diagram, circuit board quality, device quality, device pin oxidation degree, solder paste quality, solder paste printing quality, placement machine programming accuracy, placement machine
PCB design service process: 1. The customer provides schematic diagram to consult PCB design; 2. 2. Evaluate quotation according to schematic diagram and customer design requirements;3. The customer confirms the quotation, signs the contract and pays the
The reasons for the need for post-welding processing are as follows: 1, the components are not resistant to high temperature, 2, the components are too high, 3, there are a small number of plug-ins in the side of the wave crest, 4, the components plug-in
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
Common PCB welding pad over wave soldering defects have the following points: (1) board surface dirty. (2) PCB deformation. (3) drop (drop) the piece. (4) Other recessive defects.
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