Selecting the Right Surface Finish for Your PCB

 

To protect the copper solder pads on a PCB from oxidation, contamination and to enhance their solderability, they need to be protected with a Surface Finish and these must conform to the European Union RoHS & RoHS2 (Restriction of Hazardous Substances) Directives.

But which is the right Surface Finish for your PCB’s?

In accordance to this directive Eurocircuits offers the following Lead-free Surface Finishes:

  • Hot Air Levelling or Hot Air Surface Levelling (HAL or HASL).
  • Chemical Ni/Au (Electroless Nickle/Gold – ENIG).
  • Chemical Ag (Immersion Silver).
  • Electroplated Ni/Au (Hard Gold) for Edge Connectors.
  • Carbon (Chemical C) for Switch Contacts.

Each has its own advantages and disadvantages and the goal is to select the one that best fits you the Function and Usage of the PCB.

For more information please read our post Selecting the Right Surface Finish for your Design.

Another important point about Lead-free soldering this that it requires higher soldering temperatures which have a direct effect on the reliability and durability of your PCB.

For more information please read our post on How Often Can You Raise a Eurocircuits PCB to Lead-free Soldering Temperatures.

 

The Eurocircuits Team.

 



 

PCB Design & Manufacturing Live – 2019

 

Hi

You can’t beat a face-to-face discussion when looking to solve a design engineering problem and PCB Design & Manufacturing Live is the place to do just that.

Meet industry specialists and your peers to discuss technologies from traditional-sized PCB’s to small wearables boards.

Source the right services for you to streamline your designs and control your manufacturing costs.

Come along and meet Steve from Eurocircuits to discuss all your Prototype and Small series PCB Manufacturing and Assembly requirements.

We will also be showing our on-line verification tools, the PCB and PCBA Visualizer, these have been developed to help you achieve “Right First Time” for manufacture designs.

For more information visit the PCB Design & Manufacturing Live website.

To register your attendance and to receive your free badge click here.

We look forward to seeing you there.

Eurocircuits Team.