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]
______________________________________________________________________
|
