[SI-LIST] Re: Embedded Passives

  • From: "Biunno, Nick \(Nicholas\)" <nick.biunno@xxxxxxxxxxxxxxx>
  • To: <david.tate@xxxxxxxx>, <si-list@xxxxxxxxxxxxx>
  • Date: Wed, 25 Jul 2007 09:31:07 -0700

David,

I=20am=20not=20aware=20of=20any=20references=20that=20specifically=20model=
=20the=20ohmic
contact=20region=20say=20from=20a=20transmission=20line=20into=20a=20resis=
tive=20material.
As=20a=20developer=20and=20manufacturer=20of=20PCB=20embedded=20passives=20=
I=20would=20also=20be
interested=20in=20references=20that=20others=20on=20this=20list=20may=20kn=
ow.=20In=20the=20lack
of=20information=20I=20would=20suggest=20considering=20time=20domain=20mea=
surements=20from
a=20signal=20launched=20from=20a=20transmission=20line=20into=20an=20embed=
ded=20passive
component.

Keep=20in=20mind=20as=20you=20go=20through=20the=20thought=20exercise=20fo=
r=20making=20such
measurements=20that=20other=20factors=20may=20become=20more=20important=20=
in=20the=20final
analysis=20of=20the=20exercise.=20Depending=20on=20the=20frequency=20space=
=20you=20are
designing=20in=20the=20geometric=20shape=20of=20the=20resistor=20element=20=
and=20design=20of
the=20conductive=20ohmic=20contacts=20will=20have=20an=20effect=20on=20the=
=20frequency
response=20of=20the=20circuit.=20Ohmic=20contacts=20for=20metal=20thin=20f=
ilm=20resistors
such=20as=20Ohmega-Ply=20and=20Ticer=20TCR=20are=20significantly=20differe=
nt=20than=20the
contacts=20for=20polymer=20thick=20film=20resistor.=20The=20other=20major=20=
consideration
to=20frequency=20response=20is=20the=20relative=20location=20of=20the=20em=
bedded=20passive
to=20your=20reference=20planes.

Hope=20this=20helps=20in=20your=20design=20efforts.=20If=20you=20need=20ad=
ditional
information=20on=20manufacturability=20contact=20me=20directly=20by=20emai=
l.

Nick=20Biunno
Sanmina-SCI,=20Inc.
nick_biunno@xxxxxxxxxxxxxx=20=20=20

-----Original=20Message-----
From:=20si-list-bounce@xxxxxxxxxxxxx=20[mailto:si-list-bounce@xxxxxxxxxxxx=
g]
On=20Behalf=20Of=20Tate,=20David
Sent:=20Wednesday,=20July=2025,=202007=206:24=20AM
To:=20si-list@xxxxxxxxxxxxx
Subject:=20[SI-LIST]=20Embedded=20Passives

Are=20there=20any=20pitfalls=20in=20performing=20SI=20analysis=20when=20us=
ing=20embedded
passives?
=20
Modeling=20the=20plane=20capacitances=20looks=20straight=20forward=20-=20d=
istance
between=20the=20planes,=20the=20dielectric=20constant,=20tangent=20loss=20=
etc...=20should
be=20all=20I=20need.
=20
We=20are=20looking=20at=20products=20like=20Ohmega-Ply=20to=20provide=20em=
bedded
resistors.=20How=20do=20I=20model=20the=20transition=20from=20the=20copper=
=20trace=20to=20the
resistive=20material,=20or=20can=20I=20ignore=20this=20transition=20region=
?
=20
best=20regards,
=20
David=20Tate
Lockheed=20Martin=20Missiles=20and=20Fire=20Control
Senior=20Staff=20Circuit=20Design=20Engineer
Electrical=20Engineering=20-=20FPGA/Processor=20Design
E-Mail:=20david.tate@xxxxxxxx=20<mailto:david.tate@xxxxxxxx>

------------------------------------------------------------------
To=20unsubscribe=20from=20si-list:
si-list-request@xxxxxxxxxxxxx=20with=20'unsubscribe'=20in=20the=20Subject=20=
field

or=20to=20administer=20your=20membership=20from=20a=20web=20page,=20go=20t=
o:
//www.freelists.org/webpage/si-list

For=20help:
si-list-request@xxxxxxxxxxxxx=20with=20'help'=20in=20the=20Subject=20field=



List=20technical=20documents=20are=20available=20at:
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20http://www.si-list.net

List=20archives=20are=20viewable=20at:=20=20=20=20=20
=09=09//www.freelists.org/archives/si-list
or=20at=20our=20remote=20archives:
=09=09http://groups.yahoo.com/group/si-list/messages
Old=20(prior=20to=20June=206,=202001)=20list=20archives=20are=20viewable=20=
at:
=20=09=09http://www.qsl.net/wb6tpu
=20=20


CONFIDENTIALITY
This=20e-mail=20message=20and=20any=20attachments=20thereto,=20is=20intend=
ed=20only=20for=20use=20by=20the=20addressee(s)=20named=20herein=20and=20m=
ay=20contain=20legally=20privileged=20and/or=20confidential=20information.=
=20If=20you=20are=20not=20the=20intended=20recipient=20of=20this=20e-mail=20=
message,=20you=20are=20hereby=20notified=20that=20any=20dissemination,=20d=
istribution=20or=20copying=20of=20this=20e-mail=20message,=20and=20any=20a=
ttachments=20thereto,=20is=20strictly=20prohibited.=20=20If=20you=20have=20=
received=20this=20e-mail=20message=20in=20error,=20please=20immediately=20=
notify=20the=20sender=20and=20permanently=20delete=20the=20original=20and=20=
any=20copies=20of=20this=20email=20and=20any=20prints=20thereof.
ABSENT=20AN=20EXPRESS=20STATEMENT=20TO=20THE=20CONTRARY=20HEREINABOVE,=20T=
HIS=20E-MAIL=20IS=20NOT=20INTENDED=20AS=20A=20SUBSTITUTE=20FOR=20A=20WRITI=
NG.=20=20Notwithstanding=20the=20Uniform=20Electronic=20Transactions=20Act=
=20or=20the=20applicability=20of=20any=20other=20law=20of=20similar=20subs=
tance=20and=20effect,=20absent=20an=20express=20statement=20to=20the=20con=
trary=20hereinabove,=20this=20e-mail=20message=20its=20contents,=20and=20a=
ny=20attachments=20hereto=20are=20not=20intended=20to=20represent=20an=20o=
ffer=20or=20acceptance=20to=20enter=20into=20a=20contract=20and=20are=20no=
t=20otherwise=20intended=20to=20bind=20the=20sender,=20Sanmina-SCI=20Corpo=
ration=20(or=20any=20of=20its=20subsidiaries),=20or=20any=20other=20person=
=20or=20entity.
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field


List technical documents are available at:
                http://www.si-list.net

List archives are viewable at:     
                //www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu
  

Other related posts: