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
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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
>
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