What inspection should PCB light board finish before shipment?
PCB light board shipment inspection items: 1, basic inspection, 2, electrical performance test report, 3, metallographic section analysis report, 4, impedance test
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PCB design this layout, can get twice the result with half the effort
The public power cables and ground cables on the two-sided SMB should be placed near the edge of the SMB and on both sides of the SMB. The power layer and ground cable layer can be installed at the inner layer of the multi-layer SMB, and the cables, power
The effect of welding method on tin penetration of PCBA was analyzed
The most important steps in SMT patch processing are summarized as seven steps: first, graphic alignment, second, Angle of scraper and steel mesh, third, scraper force, fourth, printing speed, fifth, printing gap, sixth, separation speed of steel mesh and
How does PCBA proofing reduce casting rate
The cost is reflected in four aspects of assembly: 1, auxiliary materials: tin paste, tin strip, flux, UV glue, through the furnace fixture, 2, smt patch processing, 3, DIP plug-in after welding hours, 4, assembly test: test fixture, test equipment, test
Analysis of dust removal scheme of Pcb board after process
During design, WPC can be designed according to product characteristics to reduce shadow areas and avoid collision parts.
PCBA processing reflow welding and wave welding difference
In the through-hole PCBA assembly technique, the component is inserted into the drilled hole and a strong solder joint is formed by wave soldering. Usually, through - hole components are inserted manually
PCB manufacturing cost composition
Composition of PCB manufacturing production cost: The production cost of PCB products refers to the total of direct materials, direct labor, direct labor and other direct or indirect costs actually consumed in the production process
What's the difference between PCB hard board and FPC soft board?
PCB hard board and FPC soft board difference: 1. Rigid PCB: often used as motherboard, cannot bend, 2. Flexible board: FPC also known as flexible circuit board, can be bent
Layout rules for PCB design
PCB layout skills: 1, arrange the position of each functional circuit unit according to the circuit flow, so that the layout is convenient for signal flow, and make the signal as far as possible to maintain the same direction, 2, the core components of ea
Causes of virtual welding in PCBA processing
The reasons for the appearance of virtual welding in PCBA processing are as follows: 1. Oxidation of pad and component pins; 2. Less tin; 3. The temperature is too high or too low, 4 welding paste melting point is low, 5, solder paste quality problems
How to reduce high frequency PCB wiring crosstalk problem?
When designing and wiring PCB, it is required to do as much as possible:1. If the wiring space permits, insert a ground wire or ground plane between the two lines with serious crosstalk, which can isolate and reduce crosstalk. 2. When electromagnetic fiel
Is the quality of PCB board related to PCB color?
The performance of PCB board is determined by the material used (high Q value), wiring design and several layers of board. The quality of PCB board has nothing to do with PCB color
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