Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


RoHS solders and silver termination inks

Views: 777

Slaine

#36395

RoHS solders and silver termination inks | 30 August, 2005

we manufacture a range of ceramic parts that have silver termination,there is already a small leaching problem (absorption of the termination by the solder in liquid form)with Sn62 that we live with, having to implement unleaded solder they are normally high in tin which is the element causing the leaching, ive tried AgPT and AgPtPd inks which are a little better but still a major problem.

reply »

Ted

#36409

RoHS solders and silver termination inks | 30 August, 2005

Slaine, We use a Pd/Ag thickfilm paste. Because of the leaching we had to start using solder pastes that have silver in it. For RoHS, we are using a solder paste with an alloy of Sn95/Ag05. We also have to double print the thickfilm pastes. I hope this helps.

This message was posted Add this forum to your site! Click to learn more. the Electronics Forum @

reply »

SMT Equipment Service

SMT in-printer dispensing