Here is a calculator link that tells you how far you can bend the board before the component cracks!! http://www.calce.umd.edu/general/calculator/ And here is a link to a web paper which covers most of the issues: http://www.syfer.com/ta_02.htm Have fun, John ------------------------------------ Avanex John Burke Senior Manager RoHS Compliance [log in to unmask] 40919 Encyclopedia Circle Fremont CA 94538 tel: 510 897 4250 fax: 510 979 0189 mobile: 510 676 6312 ------------------------------------ -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Genny Gibbard Sent: Thursday, July 14, 2005 1:12 PM To: [log in to unmask] Subject: Re: [TN] Cracked Passives A quick search on their website produced http://www.kemet.com/kemet/web/homepage/kfbk3.nsf/vaFeedbackFAQ?Searchview&Q uery=(FIELD+feedbackProduct+contains+Ceramic)+AND+(FIELD+feedbackCategory+co ntains+Cracking)&Start=1&Count=10&SearchOrder=1&SearchThesaurus=TRUE Resulted in two articles Additionally, if you look at the first article that comes up, it has links to two more articles at the end. -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Karen Ebner Sent: 14-Jul-05 2:05 PM To: [log in to unmask] Subject: Re: [TN] Cracked Passives They are at the top edges of the packages. Please advise. Where can I locate these articles from Kemet? Karen Walters Ebner Raytheon Electronic Combat Systems Towson, MD 21286 410.583.4082 "Stolar, Paul W" <[log in to unmask]> 07/14/2005 03:42 PM To "TechNet E-Mail Forum" <[log in to unmask]>, "Karen Walters Ebner" <[log in to unmask]> cc Subject RE: [TN] Cracked Passives Kemet has some great articles in this. Where are the cracks? Cracks in the middle are either flex cracks or problems wit the pick and place (or some other applied force.) Cracks at the ends are usually from thermal stress? (soldering irons) Paul Stolar Materials/Reliability Engineer Manufacturing Reliability Lead Engineer Baker Atlas 713-625-5376 -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Karen Walters Ebner Sent: Thursday, July 14, 2005 1:31 PM To: [log in to unmask] Subject: [TN] Cracked Passives Would anyone list for me in most probable order the causes for cracked capacitors. Has anyone had issues with cracked caps with SnAg Solder paste???? --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------