Which Surface Finish Is Best for PCB?
The company is the world’s best lead-free hasl supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.
Besides the bare board material, what is the best surface finish for your PCB? is just as important as choosing the right bare board material. The surface finish of your product can have a significant impact on its performance and reliability. When choosing the right surface finish for your PCB, keep the following factors in mind.
Production volume – The type of finish that works best will depend on the number of PCBs you intend to manufacture. Immersion tin finishes can lose their luster quickly, but silver finishes can resist the loss of luster and keep your PCBs looking good for a long time. If your production volume is low, an immersion silver finish is likely the best choice.
Cost – ENIG is cheaper than HASL, but the difference is not significant. HASL is cheaper, but may not meet the same quality standards. The cost of surface finish is also determined by the cost of board manufacturing. PCBs for consumer electronics are usually cheaper, but they can be finished with more expensive finishes if desired. When corrosion is your primary concern, ENIG is the best choice.
Environmental concerns – HASL is not RoHS compliant and has fine pitch component limitations. In addition, HASL produces an uneven surface, making it unsuitable for use in high-reliability products. In addition, it is not lead-free unless specifically requested. Therefore, lead-free coatings can be used for high-reliability products. So, what is the best surface finish for my PCB?
Performance – PCB surface finish is also important in electrical connections. Since copper is the main conductor material on PCBs, it is prone to oxidation. Oxidation of copper has an impact on high-temperature soldering, so a smooth surface protects the copper from oxidation. It also serves as the basis for the connection between the PCB and the component. HASL is a good choice for cost-conscious companies, but not the best choice if your PCB is less coplanar.
For PCB surface preparation, Organic Solderability Preservative (OSP) is a good choice. OSPs naturally bond with copper to form an organometallic layer that protects it from oxidation. Hard gold applications are one of the most expensive PCB finishes, but they offer excellent durability and long shelf life. Some customers prefer hard gold applications, which require bus plating and additional labor.
Are you interested in learning more about multilayer pcb design tips? Contact us today to secure an expert consultation!
Immersion Silver: ENIG surface finish is applied prior to the application of the solder resist layer. This finish provides excellent solderability and surface flatness. The underlying copper is an excellent material for solder joints. ImAg is susceptible to sulfur dioxide, which can cause the surface to lose its luster and form an AgS2 layer. Therefore, for applications where solderability is critical, Immersion Silver is a good choice, but ENIG surface finish is more suitable for high-speed PCBs.
Immersion Tin: The least expensive Immersion tin finish, tin protects the underlying copper from oxidation and provides excellent surface flatness for fine pitch assemblies. In addition, dip tin is RoHS compliant, making it an excellent choice for PCBs with fine pitches and small geometries. It is also better for the environment than dip tin because it uses less water and chemicals.
• Pay with popular and secure payment methods:Palpal | Payoneer
• You will get full refund if you do not receive your PCBs in time as agreed.
• We will refund if the PCB quality is not not as described or is with defects
Quote Now
Contact us to discuss your requirements of pcb surface finish comparison. Our experienced sales team can help you identify the options that best suit your needs.