Somewhat related....Just wondering if you have an unfused PbSn plating on small pads, can you expect it to have whiskers overtime if stored in dry nitrogen storage....also, what problems should I expect with such platings if I am assembling solder bumped flilp chip devices?? Marcelo -----Original Message----- From: David D Hillman [SMTP:[log in to unmask]] Sent: Wednesday, February 04, 1998 12:24 PM To: [log in to unmask] Subject: Re: [TN] Whiskers with Sn99.3 Hi Phil - take a look at Klein Wassink's book, ISBN 0-901150-14-2, chapter 6.7, pages 197-202. The technical detail is very good and there are additional references cited. The general consensus I have observed is that tin coatings will not whisker provided they are "poisoned" with just about any other element (although the debates on tin whiskers have been quite enthusiastic at times!). Dave Hillman Rockwell Collins [log in to unmask] [log in to unmask] on 02/03/98 09:22:13 PM Please respond to [log in to unmask]; Please respond to [log in to unmask] To: [log in to unmask] cc: (bcc: David D Hillman/CedarRapids/Collins/Rockwell) Subject: [TN] Whiskers with Sn99.3 All Subject: Solder Sn99.3/.7Cu and whiskers I have been experimenting with one of the no lead solders, Sn99.3/Cu.7, and it appears to have many of the attributes that are desired for a particular product; however, I have not been able to find any literature or recent information on its resistance to tin-whisker growth. If you have any information or leads I would appreciate it. Thanks, Phil Hinton [log in to unmask] 520-745-1013 ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################ ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################ ################################################################ TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c ################################################################ To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TechNet <your full name> To unsubscribe: SIGNOFF TechNet ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################