[tinwhiskers] Re: Re-balling SAC BGAs
- From: "Mason, Bert" <BertM@xxxxxxxxxxxxx>
- To: "tinwhiskers@xxxxxxxxxxxxx" <tinwhiskers@xxxxxxxxxxxxx>
- Date: Thu, 29 Jul 2010 16:07:26 -0400
Nearly everything we make goes airborne. That means lead free is prohibited. We
found a place that specializes in electronic device repair. The company is
called B.E.S.T Their web site is www.solder.net. One of their product lines is
DIY solder SN/PB re-balling equipment. They did the rework for the XBOX recall.
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Bob Landman
Sent: Thursday, July 29, 2010 3:40 PM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Re-balling SAC BGAs
Here's one bit of information:
I'm planning to re-ball a new 484 ball BGA part we will be using since Lattice
Semiconductor refuses to make the part in tin/lead. I have investigated the
options and it is very clear to me that using tin/lead solderpaste with
lead-free solderballs is a no-no.
Polina Snugovsky at Celestica has studied this subject a lot and it's clear
from her paper that the process reflow window is very tight (you have to raise
the temp to melt the SAC balls). Too risky.
http://www.hlinstruments.com//RoHS_articles/Solder%20Joint%20Reliability%20of%20Pb-free%20Sn-Ag-Cu%20BGA%20in%20SnPb.pdf
Now if I can just get some parts in less than 22 weeks!
Not happy about this situation; Lattice seems to have me by the .....
Bob Landman
H&L Instruments, LLC
-----Original Message-----
From: tinwhiskers-bounce@xxxxxxxxxxxxx
[mailto:tinwhiskers-bounce@xxxxxxxxxxxxx] On Behalf Of Rod
Sent: Thursday, July 29, 2010 9:24 AM
To: tinwhiskers@xxxxxxxxxxxxx
Subject: [tinwhiskers] Re: Not receiving any email's re tin whiskers for the
last two months
On 29 Jul 2010, at 01:19, Randall Miller wrote:
> Me neither, but I didn't notice until you mentioned it.
> There are always plenty of things to occupy my feeble brain to not
> notice something missing.
Well, it depends on someone finding something worth saying.
regards, Rod
rod.dalitz@xxxxxxxxxxxxxxxx
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