PCBA processing requirements for PCB board
PCBA processing requirements for PCB board; 1, PCB size,2, PCB board side width,3, PCB bending,4, PCB board Mark point,5, PCB welding pad
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PCBA processing technology of the four links
The process process of PCBA can be roughly divided into four main links: SMT patch processing →DIP plug-in processing →PCBA testing → finished product assembly
What are the advantages of PCBA contract processing?
PCBA contract material processing advantages: one, PCB, two, small order, three, shorter PCBA processing cycle, four, supplier responsibility is more clear, five, client to manufacturing end seamless link, six, very suitable for small enterprises
Common pad shape and size standards for PCB design
Pad can be divided into 7 categories, according to the shape of the distinction is as follows: 1. Square pad,2. Round pad,3. Island pad,4. Teardrop pad,5. Polygon pad,6. Oval pad,7. Open pad
PCB board selection of lead - free spray tin and lead spray tin difference?
PCB board selection of lead-free spray tin and lead spray tin difference: 1, lead-free spray tin belongs to environmental protection process, does not contain harmful substances "lead", the melting point is about 218 degrees; 2, lead spray tin d...
Implement process control measurement before SMT machining
Before SMT proofing, PCB should test: 1. PCB light plate deformation, surface smooth; 2. 2. Whether there is oxidation on the circuit board welding plate; 3. Whether the copper coating on the circuit board is exposed; 4. Whether the PCB has been baked for
PCBA welding processing requirements for PCB board
In order to ensure the smooth completion of the special process and facilitate the PCBA welding process, PCB board must meet the manufacturability requirements in dimensions, pad distance and other aspects
Why is it important to choose the SMT factory to see the equipment?
PCBA circuit board debugging steps and methods: 1. Board surface observation and resistance inspection, 2. Install components, 3. Detect the output voltage of the power supply, 4. Preset overcurrent protection current, 5. Install other modules and power t
PCBA processing function test process analysis
PCBA machining functional test process: 1. Functional test plan, 2. Test points, 3. System programming, 4. Test fixture
Influence of SMT lead-free processing on PCBA repair
Accurate and reliable rework is more difficult in lead-free environments because the PCBA and the component closest to the component to be serviced must withstand multiple high temperature cycles. To protect the stability of the board, the preheating temp
The importance of manual welding line in PCBA processing
What is the warm-up to PCBA welding: When technicians and practitioners hear the words "temperature curve" or "temperature curve", they think of smt reflow soldering. Along the vast length of the weld zone, it is easy to see the four m...
The basic factors of determining perfect wave soldering in PCBA processing
Factors that determine perfect wave soldering in PCBA processing include: 1. Stable complete contact; 2. heat
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