Hi Werner

Are fillets beneficial for larger chip components, say 2512 resistors, given the greater dimensions and CTE mismatches to the
board materials?


Best Regards

David Greig
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-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Werner Engelmaier
Sent: 18 October 2006 19:19
To: [log in to unmask]
Subject: Re: [TN] Tombstoning and nitrogen

Hi Gaby
To fix your tombstoning problem for good, just make the pads small enough so you have virtually no fillets up the end surface.
The fillets serve on real functional purpose for reflow soldering [in contrast to wave soldering, of course], and the CCs/RCs
will swim up on the solder volume to give better SJ reliability to boot.

Werner

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