[SI-LIST] Re: Backdrill under BGA

Hi Sam,
   It is definitely achievable. Please check your PCB vendors. They will be 
able to tell the exact manufacturing limit for via size, back-drilling size and 
antipad clearance.

BR 
Tony

-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On 
Behalf Of cygnul@xxxxxxxxx
Sent: Tuesday, July 21, 2009 5:46 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Backdrill under BGA

SI Gurus,
Has anybody done back drilling on BGA vias for multi gig traces?
is that achievable? If so, what was the via structure? 

-Sam



      

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