Hi Scott, I don't have a solution for your problem except to say that you're depositing on metal and should have no issues if it is clean. Unless the silver is actually lifting off. I think it could be a surface prep issue or contamination from either the PCB house or your fabricator in handling. Get the surface analyzed and cleaned, then retry. That being said, there have been studies by some OEMs that indicate capability of Immersion Silver as a contactable surface in lieu of gold. That is one of the reasons Immersion Silver's popularity has increased. Unfortunately, I don't have the details and reports but someone on the Forum might. Good Luck, LS -----Original Message----- From: Douglas, Scott [mailto:[log in to unmask]] Sent: Friday, August 18, 2006 10:41 AM To: [log in to unmask] Subject: Immersion Silver and Conductive Carbon Ink Fellow list persons, =20 I have a printed circuit board used in a remote control unit. We changed the solder plating on the board to immersion silver for RoHS compliance. Our fabricator is having a problem getting the conductive carbon ink to stick to the immersion silver. Is anyone aware of this type of problem? We are trying to figure out if we just have a vendor problem or is there some issue with the immersion silver and conductive carbon ink combination. Any suggestions as to changes or corrective actions? =20 As always, thank you in advance for your comments. Scott Douglas, NCE=20 Staff Technical Specialist Harman Specialty Group=20 3 Oak Park Drive=20 Bedford, MA 01730=20 Phone: (781) 280-0406=20 Email: [log in to unmask] Web: www.harmanspecialtygroup.com=20 ---------------------------------------------------------------------------- ---Leadfee Mail List provided as a service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Leadfree To temporarily stop/(start) delivery of Leadree for vacation breaks send: SET Leadfree NOMAIL/(MAIL) Search previous postings at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=3D4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ---------------------------------------------------------------------------- --- THIS EMAIL AND ANY ATTACHED FILES ARE CONFIDENTIAL AND MAY BE LEGALLY PRIVILEGED. If you are not the addressee, any disclosure, reproduction, copying, distribution or other dissemination or use of this communication is strictly prohibited. If you have received this transmission in error, please notify the sender immediately and delete this email. It is the policy of ACR Electronics, Inc. that no legally binding statements, representations or commitments (collectively statements) may be made by email. Any such statements must be confirmed either by facsimile transmission or by postal mail before they will have legal effect. The sender of this email is not authorised to commit the company in any way and the addressee is hereby notified of that fact. -------------------------------------------------------------------------------Leadfee Mail List provided as a service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Leadfree To temporarily stop/(start) delivery of Leadree for vacation breaks send: SET Leadfree NOMAIL/(MAIL) Search previous postings at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -------------------------------------------------------------------------------