Because there is a peak of Sn there. ---- On Fri, 11 Dec 2015 06:31:29 -0800 Bhanu Sood wrote ---- >Not sure that answers why there's Sn at 0.3keV > >On Thu, Dec 10, 2015 at 12:23 PM, Vladimir Igoshev ><[log in to unmask]> wrote: >> I'm not worried about that particular one. There are 3 major in the spectrum, even though there are overlappings and not just with Ca >> >> Vladimir >> >> ---- On Thu, 10 Dec 2015 06:01:11 -0800 Bhanu Sood<[log in to unmask]> wrote ---- >> > Not sure why a Sn label appears at 0.3keV?? >> > >> > As you know, there exist more than a few peak overlaps and Sn-Ca is >> > classic, fyi.. CaKα 3.7keV, CaLα0.3, SnLα 3.4 >> > >> > I recommend a rescan point and ID, much higher mag, and increase your >> > accelerating voltage so you can look at binding energies in 10keV+ range.. >> > >> > Bhanu >> > >> > >> > >> > On Wed, Dec 9, 2015 at 7:55 PM, Vladimir Igoshev <[log in to unmask] >> > > wrote: >> > >> > > No underfill or any other fancy stuff >> > > >> > > ---- On Wed, 09 Dec 2015 16:53:28 -0800 Yuan-chia Joyce Koo< >> > > [log in to unmask]> wrote ---- >> > > > tin oxalyate used for epoxy catalyst... there were works for flux/ >> > > > underfill one step stuff utilize flux by product as catalyst for >> > > > curing... (can't remember which group did that...) >> > > > jk >> > > > On Dec 9, 2015, at 7:03 PM, Vladimir Igoshev wrote: >> > > > >> > > > > Hi Dave, >> > > > > >> > > > > Not really. It doesn't "burn" or "curl" much under the beam, so >> > > > > it's solid. >> > > > > >> > > > > Vladimir >> > > > > >> > > > > ---- On Wed, 09 Dec 2015 15:51:29 -0800 David >> > > > > Hillman<[log in to unmask]> wrote ---- >> > > > >> Thank you Steve! >> > > > >> >> > > > >> Vlad - does the substance slightly charge in the SEM? >> > > > >> >> > > > >> Dave >> > > > >> >> > > > >> On Wed, Dec 9, 2015 at 5:46 PM, Steve Gregory <[log in to unmask]> >> > > > >> wrote: >> > > > >> >> > > > >>> Hi Dave and Vlad, >> > > > >>> >> > > > >>> I have it up here: >> > > > >>> >> > > > >>> http://stevezeva.homestead.com/What_else_it_can_be.pdf >> > > > >>> >> > > > >>> Steve >> > > > >>> >> > > > >>> On Wed, Dec 9, 2015 at 4:34 PM, David Hillman < >> > > > >>> [log in to unmask]> wrote: >> > > > >>> >> > > > >>>> HI Vlad - we can't open Dropbox here due to firewall >> > > > >>>> restrictions so can >> > > > >>>> you have Steve G. post the pictures? >> > > > >>>> >> > > > >>>> Dave Hillman >> > > > >>>> Rockwell Collins >> > > > >>>> [log in to unmask] >> > > > >>>> >> > > > >>>> On Wed, Dec 9, 2015 at 4:59 PM, Vladimir Igoshev < >> > > > >>>> [log in to unmask] >> > > > >>>>> wrote: >> > > > >>>> >> > > > >>>>> HI everyone, >> > > > >>>>> >> > > > >>>>> I'm attaching a link to a file showing something I'd appreciate >> > > > >>>>> your >> > > > >>>>> thoughts on. It's a cross-section of a QFN on an IAg board; >> > > > >>>>> Pb-free/no-clean process. As you can see from the EDS spectrum, >> > > > >>>>> that >> > > > >>>>> greyish stuff between pins has pretty much only Sn and O in its >> > > > >>>> elemental >> > > > >>>>> composition. >> > > > >>>>> >> > > > >>>>> I know there is burn flux residue around solder joints but that >> > > > >>>>> stuff >> > > > >>>>> doesn't have any C in it. The question I have is what is it. >> > > > >>>>> >> > > > >>>>> I spoke to Bev and both of us are still puzzled. >> > > > >>>>> >> > > > >>>>> Here is the link: >> > > > >>>>> >> > > > >>>> https://www.dropbox.com/s/3wbj62vqjyhvj2y/What%20else%20it%20can% >> > > > >>>> 20be.pdf?dl=0 >> > > > >>>>> >> > > > >>>>> Thank you very much in advance. >> > > > >>>>> >> > > > >>>>> Regards, >> > > > >>>>> >> > > > >>>>> Vladimir >> > > > >>>>> >> > > > >>>>> SENTEC >> > > > >>>>> >> > > > >>>>> >> > > > >>>>> __________________________________________________________________ >> > > > >>>>> ____ >> > > > >>>>> This email has been scanned by the Symantec Email Security.cloud >> > > > >>>> service. >> > > > >>>>> For more information please contact helpdesk at x2960 or >> > > > >>>> [log in to unmask] >> > > > >>>>> __________________________________________________________________ >> > > > >>>>> ____ >> > > > >>>>> >> > > > >>>> >> > > > >>>> >> > > > >>>> ___________________________________________________________________ >> > > > >>>> ___ >> > > > >>>> This email has been scanned by the Symantec Email Security.cloud >> > > > >>>> service. >> > > > >>>> For more information please contact helpdesk at x2960 or >> > > > >>>> [log in to unmask] >> > > > >>>> ___________________________________________________________________ >> > > > >>>> ___ >> > > > >>>> >> > > > >>> >> > > > >>> >> > > > >>> >> > > > >>> This email and any attachments are only for use by the intended >> > > > >>> recipient(s) and may contain legally privileged, confidential, >> > > > >>> proprietary >> > > > >>> or otherwise private information. Any unauthorized use, >> > > > >>> reproduction, >> > > > >>> dissemination, distribution or other disclosure of the contents >> > > > >>> of this >> > > > >>> e-mail or its attachments is strictly prohibited. If you have >> > > > >>> received this >> > > > >>> email in error, please notify the sender immediately and delete the >> > > > >>> original. >> > > > >>> >> > > > >> >> > > > >> >> > > > >> _____________________________________________________________________ >> > > > >> _ >> > > > >> This email has been scanned by the Symantec Email Security.cloud >> > > > >> service. >> > > > >> For more information please contact helpdesk at x2960 or >> > > > >> [log in to unmask] >> > > > >> _____________________________________________________________________ >> > > > >> _ >> > > > >> >> > > > > >> > > > > >> > > > > >> > > > > ______________________________________________________________________ >> > > > > This email has been scanned by the Symantec Email Security.cloud >> > > > > service. >> > > > > For more information please contact helpdesk at x2960 or >> > > > > [log in to unmask] >> > > > > ______________________________________________________________________ >> > > > >> > > > >> > > > ______________________________________________________________________ >> > > > This email has been scanned by the Symantec Email Security.cloud >> > > service. >> > > > For more information please contact helpdesk at x2960 or >> > > [log in to unmask] >> > > > ______________________________________________________________________ >> > > > >> > > >> > > >> > > >> > > ______________________________________________________________________ >> > > This email has been scanned by the Symantec Email Security.cloud service. >> > > For more information please contact helpdesk at x2960 or [log in to unmask] >> > > ______________________________________________________________________ >> > > >> > >> > >> > >> > -- >> > Bhanu Sood >> > Tel: (202) 468-8449 >> > >> > ______________________________________________________________________ >> > This email has been scanned by the Symantec Email Security.cloud service. >> > For more information please contact helpdesk at x2960 or [log in to unmask] >> > ______________________________________________________________________ >> > >> >> > > > >-- >Bhanu Sood >Tel: (202) 468-8449 > >______________________________________________________________________ >This email has been scanned by the Symantec Email Security.cloud service. >For more information please contact helpdesk at x2960 or [log in to unmask] >______________________________________________________________________ > ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________