John,
Do you have fact about it?
I'm asking because I'm working on a design which has 3.125 GHz signals on it and I'm looking for Nelco 4000-13.
If I can avoid problem of delamination during the lead free assembly process and get rid of another simulation pass and rework because of change in material, it will be appreciated.
Louis Guérin, C.I.D.+
Conception de Plaquette de Circuit Imprimé| PCB Designer
Lyrtech RD inc.
( Téléphone - International/Phone - Worldwide: 1 (418) 877-4644 # 242
( Sans frais - Canada et É.-U./Toll-free - Canada and USA: 1 (888) 922-4644 # 242
1 Téléc./Fax: 1 (418) 877-7710
Infinite possibilities...TM
-----Message d'origine-----
De : TechNet [mailto:[log in to unmask]] De la part de John Burke
Envoyé : 28 février 2006 14:01
À : [log in to unmask]
Objet : Re: [TN] High-frequency losses (e.g., SATA)
Agreed,
One thing though, if you are using lead free soldering temperatures
Nelco - 12 works fine, Nelco - 13 does not work at all.
John
John Burke
Senior Manager - Operations , Optichron
[log in to unmask]
W: 510 249 5233
M: 408 515 4992
http://www.optichron.com
Profile: https://www.linkedin.com/e/fps/2665502/
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Dwight Mattix
Sent: Tuesday, February 28, 2006 10:09 AM
To: [log in to unmask]
Subject: Re: [TN] High-frequency losses (e.g., SATA)
Have a look at FR408. It's more like N4000-12 electrically. However,
both
FR408 and -12 have been close enough to -13 electrical performance to
drop
in as replacements in our sub-2GHz applications. Both FR408 and -12
have
similar innerlaminar bond strength as N4000-6. That is nearly double
the
inner laminar bond strength of -13. Equally important in multi-lam
single
ply uVia build up constructions has been -12 and FR408's (apparently)
lower
delam sensitivity to retained moisture. -13 is not very hydroscopic but
it
will separate from it's glass sooner than 408, -6 or -12 if there is
retained moisture.
We've used a ton of -13 over the years and still use it in selected
applications for it's higher Tg and marginally lower loss but if it's
single ply and sequential lam FR408 or -12 are the way to go.
my $.02,
dw
At 10:21 PM 2/27/2006, Ofer Cohen wrote:
>In similar occasion of similar frequency (3.125GB/s) we've declined
>IS410 and other, and approved IS620 and Nelco 4000-13. We are checking
>no Nelco 4000-12 which is supposed to be electrically equivalent to the
>-13 but chipper and LF compliant.
>
>Regards
>Ofer Cohen
>Manager - Quality Assurance and Reliability
>SIEMENS COM FN A SB
>
>-----Original Message-----
>From: TechNet [mailto:[log in to unmask]] On Behalf Of Michael Dunn
>Sent: Monday, February 27, 2006 22:40
>To: [log in to unmask]
>Subject: [TN] High-frequency losses (e.g., SATA)
>
>Hello from a new member.
>
>We're wanting to run 1.5Gbps (differential) SATA signals over a
>backplane, and naturally have SI concerns. The distance will be up to
>15". We're considering IS410 and IS620 (620 has about 2.5x less loss).
>
>I've tried using calculators from Rogers and Isola, but for some
reason,
>they only report losses in single-ended lines.
>
>Can anyone share experiences, or suggest other tools that may be of
use?
>
>
>Thanks!!!
>
>
>
>Michael Dunn
>Sr. Hardware Engineer
>Kaleidescape Canada Inc.
>611 Kumpf Drive, Unit 100
>Waterloo, ON N2V 1K8
>Canada
>Ph: 519-772-6427
>Fx: 519-772-6401
>
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