[SI-LIST] Re: Seeking a Solution for connecting 2 PCBs

  • From: steve weir <weirsi@xxxxxxxxxx>
  • To: Roger Weiss <rweiss@xxxxxxxxxxxxxxxx>
  • Date: Wed, 16 Feb 2011 09:35:19 -0800

If the boards overlap in the XY plane, the Paricon material can ineed 
offer both a compact and very pristine interface.  Teraspeed did tests 
with Paricon material a few years ago passing 40Gbps signals.  There 
should be a DesignCon 2008 and/or 2009 paper on that work.

Steve.
Roger Weiss wrote:
> Hi Hirshtal,
> You can connect the 2 boards directly to each other using a sheet of Paricon 
> elastomer. You design the boards with an array of matching pads on both 
> boards, align and clamp. You can also use coaxial structures but this will 
> not be necessary in this application. This provides a virtually invisible 
> interconnection (<0.3dB loss at 40 GHz)
>
> Regards,
> Roger
>
>
>
> Roger E. Weiss, PhD
> 421 Currant Rd
> Fall River, MA 02720
> (508) 676 8988
> (508) 676 8111 (fax)
> (508) 889 7290 (mobile)
> PLEASE VISIT THE FOLLOWING LITERATURE LINK FOR 'PRODUCT APPLICATION GUIDE 
> LINES' AND MORE: Paricon Literature
>
>
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On 
> Behalf Of steve weir
> Sent: Wednesday, February 16, 2011 2:44 AM
> To: Hirshtal Itzhak
> Cc: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: Seeking a Solution for connecting 2 PCBs
>
> Hirshtal, polyimide based flex can be made that closely matches the 
> characteristics of your flex-rigid board.  Pyralux AP is one such product.
>
> Steve.
> Hirshtal Itzhak wrote:
>   
>> Hi All,
>>  
>>
>> We have a design which is composed of 2 connected boards - one is a
>> flex-rigid and the other a rigid board. Most of the signals passing
>> between the 2 boards are high-speed (<= 3.125GHz) diff signals.
>>
>>  
>>
>> Right now the plan is to connect the 2 boards using high-speed
>> connectors, but the connectors take a lot of space on the rigid board so
>> we're looking for a solution which will not include a connector on the
>> rigid side, and also will be reliable from both the PCB manufacturing
>> perspective and SI perspective.
>>
>>  
>>
>> Do you know of such a solution?
>>
>>  
>>
>> Are there in the market any solutions based on solderable flat cables?
>>
>>  
>>
>> The solution is to work on lengths of no more than 2" from the
>> flex-rigid connector to the rigid solderings.
>>
>>  
>>
>> Thanks
>>
>>  
>>
>> Itzhak Hirshtal
>>
>>
>>
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>   


-- 
Steve Weir
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