There is any written std. / spec. for immersion Silver? Thickness, appearance, handling procedure, packaging, inspection instructions, solderability, tolerance's etc.??? Best Regards Dave Chapman <dchapman@CIRCUITS To: [log in to unmask] ERVICE.COM> cc: Sent by: TechNet Subject: Re: [TN] Immersion Silver vs. White Tin <[log in to unmask]> 28/08/2003 19:53 Please respond to "TechNet E-Mail Forum."; Please respond to Dave Chapman Agreed, Immersion Silver was a drop in replacement both at reflow and wave. Silver was lower cost or same as HASL. Only caution, the joints do look different than HASL boards so education rather than rejection is the word of the day. As with all alternate finish boards handling is important, hands off the board, slip sheets needed on only the top and bottom boards since the finish is actually below the surface of the solder mask so no big risk of scratching) in vacuum sealed bags, remove from packaging just before processing, don't let sit on the shelf unless fully processed, don't wait 3-4 weeks to run through the wave after SMT because you may see tarnish, although solderability is still good, statistically the sooner processed the better. White Tin we had to go to higher temp profile and watch every step. Congratulations on going to Lead Free PCB's Dave Chapman -----Original Message----- From: Bill DeCray [mailto:[log in to unmask]] Sent: Thursday, August 28, 2003 11:34 AM To: [log in to unmask] Subject: Re: [TN] Immersion Silver vs. White Tin Immersion silver would be the best choice Highest Regards William W. DeCray III Sales Engineering Manager Waytec Electronics Corp. Phone: (434) 237-6391 Ext 115 Fax: (434) 237-1324 Cell: (434) 851-6115 E-mail [log in to unmask] Website www.waytec.com -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory Sent: Thursday, August 28, 2003 11:31 AM To: [log in to unmask] Subject: [TN] Immersion Silver vs. White Tin Hi All! Got a customer that's calling out on the fab drawing, either Immersion Silver or White Tin for a board finish. Me, not having great deal of experience with either one (yet), am wondering if I had to choose, which one would I choose? Have any of you worked with both, and have a preference of one over the other? Why? As always, thanks in advance! -Steve Gregory- --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts 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 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts 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 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts 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 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts 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 -----------------------------------------------------