5 tarnish results

•  Gold: – Does not tarnish – Does not oxidized –  Is solderable – Has a long shelf life Con •  Gold: –  Porous –  Can be too thick – Dissolves in Eutectic Tin/Lead

| https://www.eptac.com/wp-content/uploads/2016/05/eptac_06_22_16.pdf

Understanding the PCB Fabrication Process: From Design to Delivery

Imagineering, Inc. | https://www.pcbnet.com/blog/understanding-the-pcb-fabrication-process-from-design-to-delivery/

silver’s high electrical conductivity, immersion silver (IAg) has a low signal loss. It’s also RoHS-compliant, but this finish can oxidize and tarnish

Imagineering, Inc.

Auction - TS Leiterplatten | The Branford Group

| http://www.thebranfordgroup.com/dnn3/Auction/TSLE0523.aspx

Höllmüller LPI Developer with flexible transport Pill Pre-Clean Mec Etch Bond for paint + inner layers Höllmüller Anti-Tarnish for inner layers Mec Laif Shadow Line - Direct Metallization Laif Resist Stripper with cyclone Schmid Tin Stripper Laif Ni/Au manual electroplating w/post-cleaning + dryer Laif Ni/Au – chem

ECSS-Q-ST-70-18C

| https://www.eptac.com/wp-content/uploads/2015/03/ecss_q_st_70_18c-space-product-assurance-rf-coax-cables.pdf

 cleanliness, absence of oil  films and  freedom  from  tarnish  or corrosion.  5.1.2 Environmental conditions a. The  supplier  shall  have  an  assembly  area  which  has  a  controlled  environment that limits entry of contamination.  b. The  supplier  shall