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. 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