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PCB기술

PCB기술

PCB기술

PCB기술

About Flexible Printed Board Surface treatment
2019-08-05
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Author:ipcb      Share

1.FPCB Immersion Gold

Advantage:Not easy to be oxygenated, can be stored and placed for a long time, the appearance is smooth, suitable for welding small gap pins and welding spots, it can be reflow welding many times without reducing its weldability.

Lack          :High cost, poor welding strength, due to the use of nickel - free electroplating process, easy to have black plate problems.The nickel layer oxygenates over time, and its long-term reliability is a problem.


2. FPCB Immersion Silver

Advantage:Simple process, suitable for lead-free welding, SMT.Very smooth appearance, low cost than Immersion Gold, adapt to the very precise and meticulous line.
Lack          :Storage conditions are high, easy to pollution.Welding strength is easy to reveal problems。 Electrical Test are also a problem.


3. FPCB Immersion Tin

Advantage:Adapt to parallel line production.Suitable for precise and meticulous line disposal, suitable for lead-free welding, especially suitable for pressing technology.Very good flatness, suitable for SMT.

Lack          :Demand good storage conditions, preferably not more than 6 months。 Electrical Test are also a problem.


5. FPCB  OSP

Advantage:Simple process, very flat surface, suitable for lead-free welding and SMT.Easy turnover, production and convenient operation, adapt to parallel line operation.Low cost

Lack          :Limit of reflow welds, SMT rework is not suitable.High storage requirements。