Hi Graham! Here is a pdf of one of our reports: (See attached file: 00057.pdf) Dave Graham Naisbitt <[log in to unmask]>@ipc.org> on 10/16/2001 11:37:14 AM Please respond to "TechNet E-Mail Forum." <[log in to unmask]> Sent by: TechNet <[log in to unmask]> To: [log in to unmask] cc: Subject: Re: [TN] Lead Free Surface finishes For Dave Hillman Dave thanks for that input - it is very useful. As I may have explained, we are doing this work as part of a paper we are to present at a conference in Singapore. Might we be able to see a copy of your work and to reference it in ours? Regards, Graham Naisbitt [log in to unmask] www.concoat.co.uk <http://www.concoat.co.uk> For instant access to Product Data Sheets register on the Tech-Shot area of http:// www.concoat.co.uk <http://www.concoat.co.uk> Concoat Limited Alasan House, Albany Park CAMBERLEY GU16 7PH UK Phone: +44 (0)1276 691100 Fax: +44 (0)1276 691227 Mobile: +44 (0)79 6858 2121 Attention: This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it securely and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. Concoat Ltd and any of its subsidiaries each reserve the right to monitor all e-mail communications through its networks. Any views expressed in this message are those of the individual sender, except where the message states otherwise and the sender is authorised to state them to be the views of Concoat Ltd or one of its subsidiaries. Although this message has been scanned for known viruses and inappropriate content, we recommend that recipients employ appropriate measures on their systems to intercept any such material. Thank You - Concoat Ltd -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of [log in to unmask] Sent: Tuesday, October 16, 2001 04:58 To: [log in to unmask] Subject: Re: [TN] Lead Free Surface finishes Hi Graham! Let me propose a different angle to your request: spend the money now during your testing to acquire an understanding on how the different surface finishes influence/interact with the testing protocol before settling on "one" finish. Rockwell Collins has spent the last 2 years testing finishes and gathering industry data on the alternative surface finishes. We have "qualified" several finishes - some work better in specific use applications than others. However, I also believe that we will eventually settle on just a couple (yep, you guessed it - immersion silver and immersion tin) as the main choices for assembly designs. One finish doesn't fit all as HASL did - if you limit your testing now you may end up doing additional testing in the future. Good Luck. Dave Hillman Rockwell Collins [log in to unmask] Graham Naisbitt <[log in to unmask]>@ipc.org> on 10/15/2001 05:52:10 AM Please respond to "TechNet E-Mail Forum." <[log in to unmask]> Sent by: TechNet <[log in to unmask]> To: [log in to unmask] cc: Subject: [TN] Lead Free Surface finishes Techies and (I guess - Leadies?) We are about to carry out some reliability test work, examining the influences of electro-chemical reactions using SIR techniques. The manufacturing process that will be employed involves lead-free soldering materials, water based fluxes and water based conformal coatings. The methodology we shall employ shall be as drafted in a new IEC draft spec 6-1189. The coupon we will use is intended to model mixed technology as closely as possible. We include through-hole connectors, J lead SOIC's, BGA 225, SMT Capacitors and QFP 160. We will use an LPIM resist and were going to examine 4 different surface finishes: NiAu (ENIG) ImSn - Immersion Tin ImAg - Immersion Silver OSP However, and to get to the question: We can't afford all these permutations so, we shall select only one surface finish. Can you folks advise the most popular surface finish that is likely to be used for lead-free processing? Please, we would REALLY like a simple answer rather than to open a huge dialogue - 'cos we have to get the testing done by Mid November and we have yet to have the coupons made!! Awaiting your replies with interest. Regards, Graham Naisbitt [log in to unmask] www.concoat.co.uk For instant access to Product Data Sheets register on the Tech-Shot area of http://www.concoat.co.uk Concoat Limited Alasan House, Albany Park CAMBERLEY GU16 7PH UK Phone: +44 (0)1276 691100 Fax: +44 (0)1276 691227 Mobile: +44 (0)79 6858 2121 Attention: This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it securely and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. Concoat Ltd and any of its subsidiaries each reserve the right to monitor all e-mail communications through its networks. Any views expressed in this message are those of the individual sender, except where the message states otherwise and the sender is authorised to state them to be the views of Concoat Ltd or one of its subsidiaries. Although this message has been scanned for known viruses and inappropriate content, we recommend that recipients employ appropriate measures on their systems to intercept any such material. Thank You - Concoat Ltd ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free 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 Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet Mail List provided as a free 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 Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 --------------------------------------------------------------------------------- --------------------------------------------------------------------------------- Technet Mail List provided as a free 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 Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------