From the drawing board point of view of PCB design four suggestions
Four suggestions for PCB design: 1, about positioning hole, 2, about MARK point, 3, about 5mm edge, 4, do not directly on the pad over the hole,
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How to optimize circuit board design
With the popularity of SMT lead-free process technology, the demand for PCB substrate is getting higher and higher. The performance of PCB can be improved from the design of PCB.
Basic knowledge of circuit board process
Circuit board is the necessary material of PCBA processing plant, circuit board is mainly to provide a carrier for various electronic components, and components link together to form a complete circuit.
PCB board substrate material classification
There are many kinds of PCB substrates, but they are generally divided into two categories, namely inorganic substrate materials and organic substrate materials.
Printed circuit board components are the core concept of DFM
Circuit designers and technicians of products must master and follow PCBA manufacturability design procedures. Following PCBA manufacturability design procedure is the first prerequisite for product manufacturability design.
The debugging procedure and method of PCBA machining circuit board
PCBA machining circuit board debugging steps and methods: 1. Board surface observation and resistance check, 2. Install components, 3. Detect power supply output voltage, 4. Preset overcurrent protection current, 5. Install and test other modules
Circuit board PCBA processing process is introduced
Circuit board PCBA processing process can be roughly divided into: empty plate loading - printed solder paste - mounting devices - reflow welding -AOI testing - receiving plate - finished product inspection - parts after welding - circuit board open/short
Analysis of common bad causes of PCB board making
PCB board common bad reasons: 1, short circuit, 2, open circuit, 3, PCB board dark and granular contact, 4, PCB board solder joint into golden yellow, 5, environmental impact
PCBA processing lecture hall: the common heat dissipation of circuit board
Common heat dissipation mode of circuit board: 1, high heating device plus radiator, heat conduction plate, 2, through the circuit board itself heat dissipation, 3, the use of reasonable design to achieve heat dissipation function, 4, for the use of free
PCB board design of the 8 basic principles
The application of wave-crest welding technology and reflow welding technology are completely different in component layout design, PCB and pad graphic design and hole design.
The function and process of PCB board making through hole plug are introduced
During SMT processing, plug holes are required, which have five main functions:1. Prevent short circuit caused by tin penetrating through the component surface from the passthrough hole during wave soldering of PCB; 2. Avoid flux residue in the pass hole.
Manual welding technique of electric soldering iron in circuit board processing and assembly
The influence of human factors on manual welding of soldering iron is more. Machine welding, once the process parameters are adjusted, the production is very stable, but there are problems of welding temperature and welding time in manual welding.
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