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PCB surface finishing methods comparison
With the continuous development of the electronics industry, the demand for pcb boards has also increased. Common surface technologies for pcb boards are HASL, immersion gold, gold plating, OSP, etc. In fact, HASL is divided into HASL with lead and HASL lead free.
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High-precision and high-frequency circuit board prototyping
The innovation of high-precision high-frequency circuit board rapid proofing printed circuit lies in PCB product and market innovation. The earliest PCB products were single panels, with only one layer of conductor on the insulating board, and the width of the line was measured in millimeters, which was commercialized for semiconductor (transistor) radios.
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Increased difficulty in designing high-density multilayer boards
The construction of the conductive layer (circuit) of the general substrate can be provided on the upper and lower sides of the substrate. Through the drilling and plating of through-holes in the holes, the connecting and connecting circuits of the upper and lower circuit lines are formed.
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Effect of FPC Electroless nickel immersion gold on SMT welding
FPC chemical nickel-gold is a common term, and the correct term should be called Electroless nickel immersion gold (EN / IG).
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Analysis of circuit board layout design steps
Generally speaking, the most basic process of layout circuit board design can be divided into three major steps.
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PCB Inspection and Repair Methods
Due to the high labor intensity of manual inspection, eyes are prone to fatigue and the rate of missed tests is high. And with the development of electronic products toward miniaturization and digitization, printed circuit boards are also developing toward high density and high precision, and manual inspection methods are basically impossible to achieve.
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