My recommendation is to remove the BGAs, clean carefully the area and the pads surface and solder again new BGAs with new type of solder paste. I suggest to investigate the solder paste, expiration date and the cleaning solvent / cleaning process if exist such process. e mail: [log in to unmask] Hfjord <[log in to unmask] IPNET.SE> To Sent by: TechNet [log in to unmask] <[log in to unmask]> cc Subject 02/09/2006 20:59 Re: [TN] PbCO3 Please respond to TechNet E-Mail Forum <[log in to unmask]> ; Please respond to Hfjord <[log in to unmask] IPNET.SE> Afternoon Saterday working people, I told Steve that I had some problem with the microscope. Now, I have the correct picture and has sent it to Steve for replacement. So, BGA SEMc image shows the correct PbCO3 content. Inge ----- Original Message ----- From: "Steve Gregory" <[log in to unmask]> To: <[log in to unmask]> Sent: Friday, September 01, 2006 3:16 PM Subject: Re: [TN] PbCO3 Mornin' Inge and Everybody! YAY IT'S FRIDAY! AND IT'S A 3-DAY WEEKEND TOO!!! WHOOO-HOO!!! Got the pictures up...go check out: http://stevezeva.homestead.com/files/bga001.jpg http://stevezeva.homestead.com/files/bga002.jpg http://stevezeva.homestead.com/files/bga004.jpg http://stevezeva.homestead.com/files/bga005.jpg http://stevezeva.homestead.com/files/BGA_SEM.jpg http://stevezeva.homestead.com/files/BGA_EDAX.jpg Pretty nice pictures Inge. I'm not knowledgeable at all of how to interpret your pictures. Although there's something about your SEM picture that catches my eye. I can't quite put my finger on it though...something very strange about that image. -Steve Gregory- -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Ingemar Hernefjord (KC/EMW) Sent: Friday, September 01, 2006 2:40 AM To: [log in to unmask] Subject: Re: [TN] PbCO3 I have sent pictures on the residues to Steve. Unfortunately, I did not have my ordinary microscope camera, will send better pics later. Hmmm...Carbon Peak is too low for PbCO3..have to do FTIR.. You all give little pessimistic view of the situation. Maybe we had better to replace the CBGAs with the residues...and hope there will be no more. The funny thing is that our factory in South Africa get such crystals too, and they use different flux and different solder alloy. Inge -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Joe Fjelstad Sent: den 1 september 2006 01:50 To: [log in to unmask] Subject: Re: [TN] PbCO3 Hmmmm.... It seems that lead solders might have another environmental benefit, that is as a CO2 sink to help stem global warming... ;-) Joe (One must keep their humor in the ongoing lead-free fiasco... :-) --------------------------------------------------- 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 ----------------------------------------------------- --------------------------------------------------- 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 -----------------------------------------------------