[SI-LIST] Re: Embedded elements in PCBs

Mohamed it depends on how much money you have and are willing to trade 
for manual effort.  There are advanced versions of PCB layout tools that 
help automate some of the design tasks.  They don't come cheap. 

With a certain amount of manual effort you can design these elements 
using lower cost tools and then work those results into your PCB design 
database.  For example many simple rectangular R, L, or C, elements may 
be designed to reasonable precision with nothing more than a hand 
calculator or spreadsheet.  A 2D or 2.5D field solver will get you 
closer on the Ls and Cs, and is highly recommended if you are going to 
do anything fancy like a spiral inductor with any accuracy.

If you are contemplating embedded resistors or capacitors you will want 
to understand the costs, processing, and trade-offs. In particular, you 
will want to know which PCB fab houses support the products you are 
interested in, what yields look like and what kinds of costs are 
involved.  There are multiple material players for both embedded 
resistor clads and embedded capacitance laminates.  You will want to 
contact the players and understand the design considerations for each 
product offering and your fabrication options.  The manufacturers have a 
number of published papers and design guides that they publish.  Also, 
Istvan has done a lot of work on the thin and hi K laminates for power 
delivery and you can grab papers off his site.

Embedded resistance clad suppliers:
Ohmega  Ohmega Ply(r) NiP based materials
Ticer  TCR(r) NiCr based materials

Embedded capacitance laminate suppliers:
3M, C-Ply(r), BaTiO3 loaded thin epoxy dielectric
DuPont, HK04(r), Unloaded polyimide based thin dielectrics
Oak-Mitsui, Faradflex(r), BATiO3 loaded, and unloaded epoxy based 
dielectrics

If you are out to reduce discrete caps, more than capacitance in the 
planes, reduced spreading inductance is what is going to allow removal 
of bypass caps from a well executed design using thin laminates.  There 
are benefits to be had from loaded dielectrics, but it is a lot more 
complicated than simple discrete bypass capacitor removal.

Steve.
Mohamad Haghtalab wrote:
> Hi all
>  
> How can we develope embedded elements(resistor,capacitor,inductor....) 
> shaping traces in PCB?
>  
>  
>
>       
> ------------------------------------------------------------------
> 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:
> http://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:     
>               http://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
>   
>
>
>   


-- 
Steve Weir
Teraspeed Consulting Group LLC 
121 North River Drive 
Narragansett, RI 02882 

California office
(866) 675-4630 Business
(707) 780-1951 Fax

Main office
(401) 284-1827 Business 
(401) 284-1840 Fax 

Oregon office
(503) 430-1065 Business
(503) 430-1285 Fax

http://www.teraspeed.com
This e-mail contains proprietary and confidential intellectual property of 
Teraspeed Consulting Group LLC
------------------------------------------------------------------------------------------------------
Teraspeed(R) is the registered service mark of Teraspeed Consulting Group LLC

------------------------------------------------------------------
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:
http://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:     
                http://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: