Nano Express

Nanoscale Research Letters

, 2:455

First online:

Open Access This content is freely available online to anyone, anywhere at any time.

An Organic Metal/Silver Nanoparticle Finish on Copper for Efficient Passivation and Solderability Preservation

  • Bernhard WesslingAffiliated withOrmecon GmbH Email author 
  • , Marco ThunAffiliated withOrmecon GmbH
  • , Carmen Arribas-SanchezAffiliated withOrmecon GmbH
  • , Sussane GleesonAffiliated withOrmecon GmbH
  • , Joerg PosdorferAffiliated withOrmecon GmbH
  • , Melanie RischkaAffiliated withOrmecon GmbH
  • , Bjoern ZeysingAffiliated withOrmecon GmbH


For the first time, a complex formed by polyaniline (in its organic metal form) and silver has been deposited on copper in nanoparticulate form. When depositing on Cu pads of printed circuit boards it efficiently protects against oxidation and preserves its solderability. The deposited layer has a thickness of only nominally 50 nm, containing the Organic Metal (conductive polymer), polyaniline, and silver. With >90% (by volume), polyaniline (PAni) is the major component of the deposited layer, Ag is present equivalent to a 4 nm thickness. The Pani–Ag complex is deposited on Cu in form of about 100 nm small particles. Morphology, electrochemical characteristics, anti-oxidation and solderability results are reported.


Conductive polymer Organic metal Nanoparticle Cu passivation Printed circuit board soldering