David, repeating parrot fashion.... If the Au is on Cu or Ni base, then it can be replaced by Rh with a life extension factor of approximately 4 times. However, you need to watch for blistering / adhesion of the Rh when plating thicknesses of 15u to 20u or more on the base. If the Au is plated on another base, such as Mo, then replacing Au with Rh is a lot more difficult. This information comes from our chemist an plating expert Mahendra Parekh. Regards Tim 6239 desk A1S77
_____ From: [email protected] [mailto:[email protected]] On Behalf Of David Cuthbert Sent: 14 December 2006 17:02 To: [email protected] Subject: Rhodium PCB *** WARNING *** This mail has originated outside your organization, either from an external partner or the Global Internet. Keep this in mind if you answer this message. We’re running into life issues on load boards where the Johnstech socket wears through a layer of 50 um hard electroplated gold. Does anyone have experience with Rhodium electroplating as a long life replacement for gold? The gold is specified for a hardness of 160-200 Knoop and Rhodium is 900-1000 Knoop. Dave Cuthbert Senior Test Engineer NARTE Certified EMC Engineer ***LINEAR TECHNOLOGY CORPORATION*** ***Internet Email Confidentiality Footer*** This e-mail transmission, and any documents, files or previous e-mail messages attached to it may contain confidential information that is legally privileged. If you are not the intended recipient, or a person responsible for delivering it to the intended recipient, you are hereby notified that any disclosure, copying, distribution or use of any of the information contained in or attached to this transmission is STRICTLY PROHIBITED. If you have received this transmission in error, please immediately notify me by reply e-mail, or by telephone at (719) 593-1579 and destroy the original transmission and its attachments without reading or saving in any manner. Thank you. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ ******************************************************************** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. ******************************************************************** - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
