表面处理

英泰科电子有限公司具备为印刷电路板(PCB)进行几乎所有类型表面处理的能力,或者能在一块印刷电路板上结合两种以上的表面处理方式。

 如果您对我们定制印刷电路板的制造能力有任何疑问,或者在选择印刷电路板表面处理方式方面需要更多帮助,请随时与我们联系。我们会迅速做出回应。

       如果您在焊接过程中遇到任何与焊接相关的问题,欢迎与我们交流,因为我们拥有焊接方面的专家,能够为您提供帮助。

 哪种类型的印刷电路板表面处理方式是最好的呢?实际上并不存在绝对最好的表面处理方式,您只需要选择最合适的那种就行。表面处理方式的选择应该基于印刷电路板的性能和成本要求来进行。

 



Surface Finish TypeProcessAdvantagesDisadvantagesBasic FeatureStorage (Best)
Hot   Air Solder Leveling (HASL-Lead Free)Uses molten solder and   hot air knives.Inexpensive, widely   available, and good for hole plating.Not suitable for   fine-pitch components, can cause uneven surfaces.Au   THK: 1-40μm, 6month
Immersion   Tin(ISn)PCB is immersed in a   tin bath.Flat surfaces, good for   press-fit pin insertion.Potential for tin   whiskers, sensitive to handling.Sn   THK: 1.0-1.3μm3month
Immersion   Silver(IAg)PCB immersed in a   silver bath.Flat surfaces, good   solderability.Sensitive to handling,   tarnishing, and limited shelf life.Ag     THK: 0.05-0.125μm3month
Electroless   Nickel Immersion Gold (ENIG)Nickel is plated onto   the PCB, followed by a layer of immersion gold.Flat surfaces, good for   fine pitch components, long shelf life.Expensive, potential   for black pad syndrome.Ni     THK: 3-6μm
    Au THK: 0.03-0.10μm
6month
Electroless   Nickel Electroless Palladium Immersion Gold (ENEPIG)Nickel is plated onto   the PCB, followed by a layer of palladium and then immersion gold.Excellent solderability   and wire bonding capabilities.Expensive, complex   process.Pd   THK: 0.05-0.15μm,
    Au THK: 0.025-0.05μm
6month
Organic   Solderability Preservatives (OSP)A thin layer of organic   material is placed over bare copper.Inexpensive, flat   surfaces.Limited reworkability,   sensitivity to handling, and limited shelf life.Solderable;     THK: 0.2-0.5μm,3month
Hard Gold PlatingA hard, durable gold   layer is plated onto the PCB.Durable, excellent   conductivity, ideal for mating surfaces.Expensive, and not   suitable for soldering.Au:0.76um6month
Immersion   Nickel Gold (IMG)Similar to ENIG but   involves immersion of gold over nickel.Good solderability,   flat surfaces.Expensive, potential   for black pad syndrome.Ni     THK: 3-6μm
    Au THK: 0.03-0.10μm
6month
Directly   Plated Copper (DPC)A layer of copper is   plated directly onto the PCB.Good for signal   integrity, suitable for high frequencies.More complex processes   may require special handling.

Electroless   Nickel Electroless Palladium (ENEP)Similar to ENEPIG, but   without the final immersion gold layer.Good solderability and   wire bonding capabilities.Expensive, complex   process.Ni     THK: 3-6μm