Wiring technology for PCB High speed signal circuit design specification Skill Sharing
A perfect PCB board not only needs to do the component selection and setting is reasonable, but also needs to have good signal conduction performance.
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SMT process incoming material inspection
In the SMT process of the PCB manufacturer, the solder paste printing, the operation of the SMT machine, and the welding of the reflow welding furnace should be listed as the key processes.
How to rework BGA and CSP components?
Take a look at BAG difficult chip repair process, requirements for equipment, personnel: 1, rework requirements for process equipment, 2, components of the temperature requirements, 3, components compatibility, 4, temperature difference Settings, 5, tempe
What items should PCBA examine? And what are the inspection criteria?
Some measures can be taken to clean the tail of PCBA production and processing to improve work efficiency: 1. About 40pcs of PCB board shall be checked and signed by the quality engineer before the product comes off the line. 2. The operator or inform the
Causes and solutions of poor wetting in SMT processing plants.
The main reasons for poor wetting are: 1, the surface of the welding area is polluted, 2, when the residual metal in the solder exceeds 0.005%, the activity of the flux is reduced, 3, wave soldering, there is gas on the surface of the substrate,
The characteristics, problems and solutions of lead-free flux used in SMT plant
Analysis of bad causes of PCBA patch processing plant: 1, PCBA air welding, 2, PCBA short circuit, 3, PCBA warping, 4, PCBA missing parts, 5, PCBA tin beads, 6, PCBA offset
Precision control skills and methods of PCB board milling
The milling technology of circuit board CNC milling machine includes the selection of cutting direction, compensation method, positioning method, frame structure, the next cutter point, which is an important aspect to ensure the milling precision.
Various prevention methods of silver plating process of PCB circuit board
Five common silver plating defects of multilayer circuit boards have been solved by solution manufacturers, equipment manufacturers and PCB factories, and some methods have been found to prevent and improve them.
PCBA board factory: Why use electric soldering iron to produce tin beads
Prevention can be carried out in the following ways: 1, moisture-proof storage of components, 2, choose well-known brand solder paste, 3, adjust printing parameters, 4, adjust reflow temperature curve, 5, try to use reflow welding, reduce manual welding,
What should we pay attention to in the quality control of PCBA process?
The quality control of the whole pcba process is very important. 1.PCB circuit board manufacturing; 2.PCBA incoming components procurement and inspection; 3.SMT patch processing; 4. Plug-in processing, 5. Program burning, 6.PCBA board test
What causes the holes in SMT patch processing
The emptiness is mainly caused by the following reasons: first, welding paste. Two, PCB welding pad surface treatment. Three, reflux curve setting. Four, reflux environment. Five, pad planning. Six, micropores.
PCBA quality control in SMT plant
To repair and maintain the internal circuit board, the following maintenance methods are: 1, inspection components, 2, welding state analysis, 3, component direction detection, 4, tool inspection of parts, 5, startup test
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