RE: [SI-LIST] : Board Data Needed

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From: Greim, Michael (mgreim@mc.com)
Date: Mon Aug 28 2000 - 05:50:08 PDT


Sorry if this has been answered already.....

Dual stripline is also sometimes referred to as
asymetric stripline. It refers to a structure
that is stripline in nature as it is sandwiched
between pwr/gnd planes, but there is more than
one signal layer. This does not mean necesarily
that these are broadside coupled. Often times
these adjacent sig layers are routed perpendicular
to one another.
See below.

Stripline

        -------------------- pwr/gnd
                ------- sig
        -------------------- pwr/gnd

dual stripline

        -------------------- pwr/gnd
                ------- sig 1
                ------- sig 2
        -------------------- pwr/gnd

I hope this helps.

MG

-----Original Message-----
From: Muhammad S. Sagarwala [mailto:msagarwa@san-jose.tt.slb.com]
Sent: Thursday, August 24, 2000 12:40 PM
To: Ken Willis; 'Michael Lamson'; si-list@silab.eng.sun.com
Subject: Re: [SI-LIST] : Board Data Needed

Hi Ken,

Pardon my ignorance....What is a dual stripline...I mean what is the
difference between
regular stripline and dual stripline...

cheers,

Muhammad
-----Original Message-----
From: Ken Willis <Ken.Willis@siroccosystems.com>
To: 'Michael Lamson' <m-lamson@ti.com>; si-list@silab.eng.sun.com
<si-list@silab.eng.sun.com>
Date: Thursday, August 24, 2000 6:24 AM
Subject: RE: [SI-LIST] : Board Data Needed

>Hi Mike,
>
>The bulk of the stuff I am seeing here generally looks like:
>
>5 mil line & space
>5 mil dielectric thicknesses of FR4 (Er = 4)
>dual stripline inner layers/microstrip outer layers
>1/2 oz copper (0.7 mil thickness)
>
>Ken Willis
>Sirocco Systems
>
>
>
>-----Original Message-----
>From: Michael Lamson [mailto:m-lamson@ti.com]
>Sent: Thursday, August 24, 2000 10:43 AM
>To: si-list@silab.eng.sun.com
>Subject: [SI-LIST] : Board Data Needed
>
>
>Hi folks. I would like to get some typical numbers for PC board RLCG
>parameters. I am coming from the packaging side and I'm not familiar with
>the latest board technologies. I can generate these numbers myself if you
>have typical line width/spacing/thickness geometries, dielectric properties
>(epsilon and loss tan) and dimensions. Any info will be appreciated.
>
>Best regards,
>
>Mike Lamson
>TI
>m-lamson@ti.com
>
>
>
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