Nevermind - as soon as I hit send I realized we weren't talking about BGAs. Scott Post Staff Manufacturing Engineer Delphi -----Original Message----- From: Post, Scott E Sent: Tuesday, August 25, 2009 3:18 PM To: 'TechNet E-Mail Forum' Subject: RE: [TN] x-ray to estimate solder voiding What is your pry method? Whenever I've done this, both for SnPb and Pb free, the majority of the balls end up pulling the pads right out of the board. I'd say less than 10% of the joints break in the solder. I've use the simple "bend it over the corner of the desk" method as well as epoxying stubs to the board & component and pulling them apart with an Instron at various speeds. More often than not the copper pads are torn from the board. Scott Post Staff Manufacturing Engineer Delphi -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge Sent: Tuesday, August 25, 2009 3:11 PM To: [log in to unmask] Subject: Re: [TN] x-ray to estimate solder voiding Kevin, if you can sacrifice a sample, preying off the component is a way to get a very exact way to study voids. If the voids are adjacent to the solder pad, which is often the case, the separation use to be just there. Very large components, e.g. superBGAs, can not be removed this way, of course. Inge ----- Original Message ----- From: "Glidden, Kevin" <[log in to unmask]> To: <[log in to unmask]> Sent: Tuesday, August 25, 2009 8:29 PM Subject: [TN] x-ray to estimate solder voiding I am looking to have a couple of PCBs x-rayed to estimate the solder voiding on the bottom only center pad of an SMT component. Can anyone recommend a place? Off line answers OK. Thank you, Kevin Glidden Manufacturing Engineer Luminescent Systems Inc. Lebanon, NH 03766 --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 15.0 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 ----------------------------------------------------- **************************************************************************************** Note: If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by replying to the message and deleting it from your computer. Thank you. **************************************************************************************** --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 -----------------------------------------------------