Cheryl, You are short on details. How do you know they are fractures? Are your boards FR4, ceramic CEM? What temp is your pot? What solder are you talking about SnPb, lead free with bismuth in it? Where exactly on the joints are the possible anomalies? Bev RIM -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Cheryl Tulkoff Sent: May 9, 2005 4:46 PM To: [log in to unmask] Subject: [TN] Suggested failure analysis technique? I have a large lot of circuit boards where about 20% have small, hairline solder fractures around some wave soldered PTH connector joints. We're working on root cause analysis to prevent it from happening and repairing the boards which have failed inspection. But, we're tying to figure out what to do with the boards that have passed the inspection but may be at risk. Quick and dirty tests have been unable to create fractures on these joints and they pass visual criteria. Are there any quantitative tests that could be performed on a sample to verify solder joint integrity? We don't hae any historical data for comparison. Thanks! Cheryl --------------------------------------------------- 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 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------------------------- This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful. --------------------------------------------------- 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 847-615-7100 ext.2815 -----------------------------------------------------