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July 2010

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Subject:
Re: Interposer for SAC BGA
From:
Cedric ORAIN <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Cedric ORAIN <[log in to unmask]>
Date:
Fri, 9 Jul 2010 16:23:12 +0200
Content-Type:
text/plain
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text/plain (64 lines) 
Why not mixed process (Backward SnPb) ? 


-----Message d'origine-----
De : TechNet [mailto:[log in to unmask]] De la part de Bob Landman
Envoyé : vendredi 9 juillet 2010 16:06
À : [log in to unmask]
Objet : [TN] Interposer for SAC BGA

I have to use a new FPGA from Lattice and they are not offering it in SnPb,
only SAC balls.  This is a fpBGA 23mm sq with 484 balls in a square array
with no special heatsink pads.

Environment is -40 to +85C, mild vibration and shock, outside environment in
electrical NEMA enclosures.

SnPb is a must - I refuse to use lead free process for our products.

Two choices:

Interposer board (Bill Rollins just told me about this option 

Reballing

Comments please on your preference.

Bob Landman


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