Moshe, That's a huge question that you ask.
If you are selling to AT&T, they have a method in TP76200MP that you can use to demonstrate that the Pb-free solder joints are reliable. Verizon has no such method to demonstrate reliability and hence RoHS-6 assemblies are not permitted. All other telecom customers that I am aware of accept RoHS-6 assemblies. I have spent a lot of time investigating this issue and found that there are ways to properly build PCBAs with SnPb or SAC solder alloys. There are, of course, ways to make PCBAs poorly with either process. SAC takes a little more effort on component selection and process validation due to the increased processing temperatures. The caveat, of course, is the application. I am commenting on Central Office applications with long expected lifetimes but relatively benign environments. Avionics or other high thermal/mechanical-stress environments may result in a different answer. You may get other opinions on this subject but nothing is going to eliminate the need for your company to properly qualify the process, components, materials, etc. ...Marko From: Moshe Valdman [mailto:[email protected]] Sent: Thursday, July 02, 2009 11:37 AM To: [email protected] Subject: [PSES] RoHS 6 on Telecom cards Hi, Although currently exempt from full RoHS (and mostly manufactured to RoHS 5- i.e. with lead in the soldering), I know many manufacturers already converted to full RoHS (6) Can you comment on reliability / expected life of these boards? Are RoHS 6 boards more sensitive to environment? thanks in advance, Moshe - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ 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]> Important : This message is intended only for the recipient(s) identified above by the originator or forwarder of this message and may contain information that is confidential, proprietary and/or legally privileged. If you have any reason to believe or suspect that this message may have come to you in error, please notify the originator of this message of your receipt of it, refrain from sharing this message with anyone else, delete it from each computer or server on which it is stored (without copying it or printing it out) and take no other action based on its content. Thank you. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ 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]>
