David, Actually, these parts are from the vendor and we are rebumping per customer request. I share your concern and I am concerned about the vias on the PBGA substrate. I read 'Via Life vs. Temperature Stress Analysis of Interconnect Stress Test' and other articles about how high temp affects the vias in the substrate. Thank you for the warning, though :) David >From: "David D. Hillman" <[log in to unmask]> >Reply-To: TechNet E-Mail Forum <[log in to unmask]>, >[log in to unmask] >To: [log in to unmask] >Subject: Re: [TN] XFS analysis >Date: Thu, 8 Dec 2005 16:47:19 -0600 > >Hi David! If I understand you correctly, you are rebumping a BGA component >that has SnPb solderspheres with SAC405 solderspheres. I highly recommend >you proceed with caution as you are exposing a BGA component vendor >qualified only for SnPb soldering processes to Pbfree soldering process >temperatures (once for the rebumping procedure and once for the assembly >procedure). You may induced component defects due to the higher temperature >exposures. > >Dave Hillman >Rockwell Collins >[log in to unmask] > > > > > David Tremmel > <davidtremmel@HOT > MAIL.COM> To > Sent by: TechNet [log in to unmask] > <[log in to unmask]> cc > > Subject > 12/08/2005 04:28 Re: [TN] XFS analysis > PM > > > Please respond to > TechNet E-Mail > Forum > <[log in to unmask]> > ; Please respond > to > David Tremmel > <davidtremmel@HOT > MAIL.COM> > > > > > > >Hello, > >I have a sample of standard-eutectic BGAs to reball with SAC405 solder >spheres to evaluate if, among other things, the reballed BGAs will meet >RoHS >compliance. Our customer requested XRF analysis to verify this but if ye >perveyors of the higher knowledge have better resouces than I to accomplish >this then I be at thy disposal for suggestions. > >Also, if anyone has experience with lower temperature lead-free alloys, I >would be interested in recommendations on that as well. > > >Thank you in advance Technet, > >David > > >From: "Gervascio, Thomas" <[log in to unmask]> > >Reply-To: TechNet E-Mail Forum <[log in to unmask]>, >"Gervascio, > >Thomas" <[log in to unmask]> > >To: [log in to unmask] > >Subject: Re: [TN] XFS analysis > >Date: Thu, 8 Dec 2005 17:05:52 -0500 > > > >Is this like X Ray Fluorescence? In the case of XRF, if the solder > >thickness is too thick, then the X ray from the underlying metalization > >would be absorbed and not detected. I think about 1 to 2 mils would > >probably be the limit but dependent upon the unit. A solder ball though > >would probably be too thick to get anything other than the solder alloy > >composition. > > > >Trace Labs is a good candidate. In the southeast US, Constellation Labs > >(Largo FL- Constellation Technology Corporation 7887 Bryan Dairy Road, > >Suite 100 Largo, FL 33777) > > > >Tom > > > >-----Original Message----- > >From: TechNet [mailto:[log in to unmask]] On Behalf Of David Tremmel > >Sent: Thursday, December 08, 2005 1:35 PM > >To: [log in to unmask] > >Subject: [TN] XFS analysis > > > >Technet, > > > >I have 20 BGAs which our client would like XFS analysis performed. > > > >Could someone point me in the general direction of a company in the US >who > >could perform this work? > > > >Thank you in advance, > > > >David > > > >_________________________________________________________________ > >Consigue aquí las mejores y mas recientes ofertas de trabajo EE.UU. > >http://latino.msn.com/empleos > > > >--------------------------------------------------- > >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 > >----------------------------------------------------- > >_________________________________________________________________ >MSN Latino: el sitio MSN para los hispanos en EE.UU. http://latino.msn.com/ > >--------------------------------------------------- >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 >----------------------------------------------------- _________________________________________________________________ ¿Cuánto vale tu auto? 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