Dave: The report has been updated, substantially. Some of this was reported at IPC last year and is on our website at: http://www.tycoelectronics.com/environment/leadfree/pdf/Tyco_IPC_2003_Chou.p df More to come... Cheers, Bob -----Original Message----- From: Leadfree [mailto:[log in to unmask]]On Behalf Of MA/NY DDave Sent: Friday, May 28, 2004 12:44 PM To: [log in to unmask] Subject: Re: [LF] Lead Free design guides for press fit Hi Cemco-Peter, Tyco-Hilty and IPC LF Listservers, I have been striving to stay off list to do other LF study and work yet this is an exciting proposition for technical information. As you know I still have a NIST duty to negotiate / reclaim and a few others. First of all this report that Bob linked us to now and in the past, is done quite well. The European Tyco group did a great job of giving the baseline for SnPb HAL or HASL yet I guess were not able to do comparatives for all the other metallurgies. I mean sometimes studies just are not complete yet can still be done really well. So I hope you can all negotiate and can find the time to update this fine report by Belgium, Tyco Yours in Engineering, Dave Y i Engr, MA/NY DDave On Fri, 28 May 2004 15:06:34 +0100, Pete Lymn <[log in to unmask]> wrote: >Thanks Robert, >I read the paper with interest but note that fused lead free solders were >not compared. Lead free solders can be applied using adapted HASL machines >and result in more uniform surface and hole coatings. The lighter alloys >require less energy to level resulting in a much tighter thickness range >with improved 'minimum' thicknesses and significantly lower 'maximum' >thicknesses. Hole clearing is more uniform with less closedown. If you or >anyone else would like us to tin some sample to compare please do not >hesitate to contact me. We have SnCu+Ni permanently available and will be >conducting trials with two SAC alloys in the next few weeks... >Peter. ---------------------------------------------------------------------------- ---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 delivery of Leadree for vacation breaks send: SET Leadfree NOMAIL 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 847-509-9700 ext.5315 ---------------------------------------------------------------------------- --- -------------------------------------------------------------------------------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 delivery of Leadree for vacation breaks send: SET Leadfree NOMAIL 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 847-509-9700 ext.5315 -------------------------------------------------------------------------------