[SI-LIST] Re: fiber-weave effect alive and well?
- From: "Lee Ritchey" <leeritchey@xxxxxxxxxxxxx>
- To: "Russell S. Dudek Jr." <rdudek@xxxxxxxxxxxxxxx>
- Date: Thu, 20 Sep 2007 09:36:43 -0700
Russell,
Good work. I look forward to seein this. Mightbe a good idea to give them
another name, so they don't get confused with the other materials.
Lee Ritchey
> [Original Message]
> From: Russell S. Dudek Jr. <rdudek@xxxxxxxxxxxxxxx>
> To: <leeritchey@xxxxxxxxxxxxx>
> Cc: si-list <si-list@xxxxxxxxxxxxx>
> Date: 9/20/2007 5:41:16 AM
> Subject: [SI-LIST] Re: fiber-weave effect alive and well?
>
> Lee
>
> No hard feelings :)
>
> I might add, more specifically, we have been very successful at targeting
> thin glass reinforcement styles made of both E glass and our proprietary
> very low Dk glass. Our 1080 (and soon 106) is nearly 100% free of the
> typical holes found in traditional glass fabric weave. It is uniform,
thin,
> flat, and fast. Any PCB made of laminates constructed of our 1080 and/or
> 106 styles will realize great performance benefits.
>
> White paper to hit the presses soon...
>
> Cheers,
>
> RD
>
> Russell Dudek
> Technology Specialist
> Compunetics, Inc.
> 700 Seco Road
> Monroeville, PA 15146
> 412-858-6264
> rdudek@xxxxxxxxxxxxxxx
> www.compunetics.com
>
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On
> Behalf Of Lee Ritchey
> Sent: Monday, September 17, 2007 12:35 PM
> To: Steve Weir
> Cc: QU Perry; si-list
> Subject: [SI-LIST] Re: fiber-weave effect alive and well?
>
> Steve,
>
> Thanks for the plug! Sometimes the best solutions are the easiest!
>
> Lee
>
>
> > [Original Message]
> > From: steve weir <weirsi@xxxxxxxxxx>
> > To: <leeritchey@xxxxxxxxxxxxx>
> > Cc: QU Perry <Perry.Qu@xxxxxxxxxxxxxxxxxx>; si-list
> <si-list@xxxxxxxxxxxxx>
> > Date: 9/15/2007 12:10:47 PM
> > Subject: Re: [SI-LIST] Re: fiber-weave effect alive and well?
> >
> > In the shameless plug for someone else dept: Lee's book "Right the
> > First Time Volume 2" does do a nice job of demonstrating the difference
> > between various weaves including some good cross-section
> > microphotographs and TDR plots. I think it is worth the price of the
> > book for that information alone.
> >
> > Steve
> > Lee Ritchey wrote:
> > > The link to the Circuitree web site requires each person to register
and
> > > obtain a password.
> > >
> > > It is true that the thinner weaves are the problem.
> > >
> > > I cover these weaves and results in Chapter 5 of Volume 2 of my book.
> > > There are photos showing what the weaves look like compared to a 3.5
> mil
> > > trace. Also show what vias do to very fast signals.
> > >
> > > Lee Ritchey
> > >
> > >
> > >
> > >> [Original Message]
> > >> From: QU Perry <Perry.Qu@xxxxxxxxxxxxxxxxxx>
> > >> To: si-list <si-list@xxxxxxxxxxxxx>
> > >> Date: 9/14/2007 12:25:54 PM
> > >> Subject: [SI-LIST] Re: fiber-weave effect alive and well?
> > >>
> > >> I would be interested to see a link as well.
> > >>
> > >> Jeff's paper on DesignCon2007 is convincing to me that this is
> something
> > >> we need to pay attention. Real life design will probably not be as
bad
> > >> as the theoretical estimate since most of the diff pair routing we
have
> > >> on the PCB is not likely to run a long length non-stop in parallel
with
> > >> edge. The "jog" as is called in the paper is very common due to vias
> etc
> > >> and pretty random.
> > >>
> > >> Also from the data we got from PCB vendor, it appears that thinner
> > >> dielectric substrate the worse fibre weave effect as the gap between
> the
> > >> fiber is larger. Has this been looked at ?
> > >>
> > >> Regards
> > >>
> > >> Perry
> > >>
> > >>
> > >>
> > >
>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
> > >
> > >> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=20
> > >>
> > >> Perry Qu=20
> > >>
> > >> Design & Qualification, Alcatel-Lucent Canada Inc.
> > >>
> > >> 600 March Road, Ottawa ON, K2K 2E6, Canada=20
> > >>
> > >> DID: 613-7846720 Fax: 613-5993642=20
> > >>
> > >> Email: perry.qu@xxxxxxxxxxxxxxxxxx=20
> > >>
> > >>
> > >>
> > >
>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
> > >
> > >> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=20
> > >>
> > >> =20
> > >>
> > >>
> > >>> -----Original Message-----
> > >>> From: si-list-bounce@xxxxxxxxxxxxx=20
> > >>> [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of=20
> > >>> Aubrey_Sparkman@xxxxxxxx
> > >>> Sent: Friday, September 14, 2007 1:59 PM
> > >>> To: leeritchey@xxxxxxxxxxxxx; rdudek@xxxxxxxxxxxxxxx;=20
> > >>> si-list@xxxxxxxxxxxxx
> > >>> Subject: [SI-LIST] Re: fiber-weave effect alive and well?
> > >>> =20
> > >>> Would you like to share a link?=3D20
> > >>> =20
> > >>> =20
> > >>> Aubrey Sparkman=3D20
> > >>> Enterprise Engineering Signal Integrity Team=3D20 Dell, Inc.=3D20=20
> > >>> Aubrey_Sparkman@xxxxxxxx=3D20
> > >>> (512) 723-3592=3D20
> > >>> "Discovery consists of seeing what everybody has seen and=20
> > >>> thinking what nobody else has thought." - Jonathan Swift
> > >>> =20
> > >>> =20
> > >>> -----Original Message-----
> > >>> From: si-list-bounce@xxxxxxxxxxxxx=20
> > >>> [mailto:si-list-bounce@xxxxxxxxxxxxx]
> > >>> On Behalf Of Lee Ritchey
> > >>> Sent: Friday, September 14, 2007 11:36 AM
> > >>> To: Russell S. Dudek Jr.; si-list@xxxxxxxxxxxxx
> > >>> Subject: [SI-LIST] Re: fiber-weave effect alive and well?
> > >>> =20
> > >>> We already have a glass weave solution. Check my column in=20
> > >>> the April issue of Circuitree magazine.
> > >>> =20
> > >>> Lee Ritchey
> > >>> =20
> > >>> =20
> > >>>
> > >>>> [Original Message]
> > >>>> From: Russell S. Dudek Jr. <rdudek@xxxxxxxxxxxxxxx>
> > >>>> To: <si-list@xxxxxxxxxxxxx>
> > >>>> Date: 9/12/2007 1:10:28 PM
> > >>>> Subject: [SI-LIST] Re: fiber-weave effect alive and well?
> > >>>>
> > >>>> Steve,
> > >>>> =3D20
> > >>>> I agree, Fiber Weave Effect (FEW) has most certainly been=20
> > >>>>
> > >>> confirmed by
> > >>> such
> > >>>
> > >>>> research. However, there is a new change in the wind. I=20
> > >>>>
> > >>> have the=3D20=20
> > >>>
> > >>>> unique opportunity, as a technical liaison, to enable a=20
> > >>>>
> > >>> technology=3D20=20
> > >>>
> > >>>> that may put
> > >>>>
> > >>> an
> > >>>
> > >>>> end to FWE as a consideration in high-speed designs. We=20
> > >>>>
> > >>> all know that
> > >>> =20
> > >>>
> > >>>> the crux of the matter is the glass weave and its effect on=20
> > >>>>
> > >>> localized
> > >>> Er.
> > >>>
> > >>>> Either get ride of the reinforcement layer completely or
more=3D20=20
> > >>>> challenging change the fundamentals of the glass weave fabrication
> > >>>>
> > >>> process (GWFP).
> > >>>
> > >>>> =3D20
> > >>>> We have taken the more challenging (and fun) approach and have=20
> > >>>> rocked=3D20 the fundamentals the GWFP. I cannot disclose much
the=20
> > >>>> specifics of=3D20 the technology and our partners in such an=20
> > >>>>
> > >>> open forum. =20
> > >>>
> > >>>> However, if=3D20 you are interested learning more feel free=20
> > >>>>
> > >>> to contact=20
> > >>>
> > >>>> me and we can=3D20 get the proper NDAs in place to facilitate=20
> > >>>>
> > >>> such a discussion.
> > >>>
> > >>>> =3D20
> > >>>> RD
> > >>>> =3D20
> > >>>> Russell Dudek
> > >>>> Technology Specialist
> > >>>> Compunetics, Inc.
> > >>>> 700 Seco Road
> > >>>> Monroeville, PA 15146
> > >>>> 412-858-6264
> > >>>> rdudek@xxxxxxxxxxxxxxx
> > >>>> www.compunetics.com <http://www.compunetics.com/> =3D20
> > >>>>
> > >>>> To see where no one notices the contrast of white on white is =
> > >>>>
> > >> an=3D20=20
> > >>
> > >>>> indispensable virtue of infinite potential.
> > >>>>
> > >>>> =3D20
> > >>>>
> > >>>>
> > >>>>
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> >
> > --
> > Steve Weir
> > Teraspeed Consulting Group LLC
> > 121 North River Drive
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> >
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