Nick:
We have used Russ in the pass to reball devices (452 balls/pkg) for us
which we subsequently placed into a relaibility chamber for further
testing (temp=55C) for several months with no degradtion in joint or
part performance.
This empirical data, as well as a wealth of theoretical models, suggest
that resoldering/reballing does not significantly affect the reliability
performance of a BGA when done correctly.
Thanks & regards
> Bill Davis, Ph.D.
> Diamond Multimedia Systems
> Senior Scientist
> Tel. 408.325.7868
> Cell. 408.888.5650
> e-mail: [log in to unmask]
>
>
-----Original Message-----
From: Nick D'Onofrio [mailto:[log in to unmask]]
Sent: Friday, April 23, 1999 5:39 AM
To: [log in to unmask]
Subject: Re: [TN] BGA solder ball replacement options? -Reply
Hello Russ,
Your facility would be of interest to us. I haven't considered
re-balling BGA
components as of yet, I have some reliability concerns..
Does anyone out there have any documentation on the subject?
What are your opinions on the process? Should I be concerned??
Regards,
Nick D'Onofrio
Quality Assurance
CAE electronics
[log in to unmask]
>>> Russ <[log in to unmask]> 04/22/99 06:12pm >>>
Hi Tomaso,
Another option is for you to send your components to our facility in
California where we specialize in ball attach and reballing services.
Our minimum lot charge is $50 for up to three components and the price
per component goes down significantly with volume. We have an automated
ball attach machine built by RVSI/Vanguard for lot sizes in the 1000+
piece range. We also have robotic wave soldering systems we use for
deballing. Much better than manual methods. We can do Ceramic BGAs
with high lead balls, micro BGAs, and solder columns for converting BGAs
into column grid arrays.
Regards, Russ Winslow
Six Sigma
1940 Concourse Drive
San Jose, CA 95131
[log in to unmask]
http://www.sixsigmaservices.com
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Tomaso Mordha
Sent: Monday, April 19, 1999 2:33 AM
To: [log in to unmask]
Subject: [TN] BGA solder ball replacement options?
Colleagues,
We have to find a way to replace solder balls on small quantities of BGA
devices, and I wonder what is available on the market. There might be
just
one unit or up to perhaps fifty units per lot.
The BGAs are of various sizes, and pitches, and ball sizes.
Is there a machine which can do this job for us? Can you suggest
manufacturers names, and give a guess at the price range.
Are there subcontractors who offer a ball replacement service - and fast
turnaround? Again I would be grateful for any pointers from those of
you who
have experience of this work.
TIA....
Tomaso
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