Imagineering, Inc. | https://www.pcbnet.com/blog/pcb-prototyping-what-you-should-be-looking-for/
. Copper weights range from 1 to 4g. Finish plating can be leaded solder, or any following RoHS-compliant finishes: lead-free solder, immersion gold, immersion silver, white tin, or OSP
Imagineering, Inc. | https://www.pcbnet.com/blog/understanding-the-pcb-fabrication-process-from-design-to-delivery/
. The best choice primarily depends on the customer’s budget and the PCB’s specifications. In addition to their physical properties, designers must consider the legal regulation of materials when selecting a surface finish for PCBs
Surface Mount Technology Association (SMTA) | https://www.smta.org/icsr/speaker_forms/Paper-Format-Requirements.doc
] that the immersion silver surface finish selected for lead-free PCBs had the susceptibility to creep corrode when used in high sulfur and high humidity environments
Surface Mount Technology Association (SMTA) | https://www.smta.org/education/presentations/presentations.cfm
+125oC for 5800 cycles. It was observed that ENIG surface finish improves the component reliability comparing to OSP and ImAg. It is also observed that matching solder sphere with solder paste alloys improves the reliability in several cases, but a significant improvement was not observed when compared with the SAC305 solder spheres
Surface Mount Technology Association (SMTA) | https://www.smta.org/webinars/
+125oC for 5800 cycles. It was observed that ENIG surface finish improves the component reliability comparing to OSP and ImAg. It is also observed that matching solder sphere with solder paste alloys improves the reliability in several cases, but a significant improvement was not observed when compared with the SAC305 solder spheres
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