[SI-LIST] Re: Board via characteristics (fwd)

Dave, more information is needed, particularly the size of the annular 
ring, the number of layers, and the anti-pad sizes.

Regards,

At 12:50 PM 5/9/2002 -0700, David Hoover wrote:


>Gang,
>
>I was asked if I could forward this
>question to the list for input. I'm a
>fabricator that builds high speed PCBs
>out of many different composites. I'm
>also very curious about modeling vias
>because I co-chair the IPC committee
>on Controlled Impedance Circuit Boards and
>High Speed Logic Design and during the last couple of Conference Meetings 
>this topic has
>came up. I run a 2D Field Solver which I
>believe can model for vias. Just never have
>done it.
>
>Any and all response would be greatly
>appreciated.
>
>David Hoover
>Field Application Engineer
>Data Circuit Systems, Inc.
>(408) 280-0422 X233
>http://www.datacircuits.com
>
>
>
>-------- Forwarded message --------
>Date: Thu, 9 May 2002 15:14:30 -0400
>From: dhoovy@xxxxxxxxxxxxx
>Subject: Board via characteristics
>
>Dave:
>
>For Spice modeling purposes, we need the equivalent inductance and AC
>resistance ( at 0.5 Ghz - 1.0 Ghz ) of a board via,
>
>length = 0.062 inches and diameter = 0.006 inches, no other parasitic
>effects needed at this time.
>
>                                                                    Regards,
>
>                                                                    Bob
>
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