[SI-LIST] Re: Effect of PCB trace cross-section on SI

Zeeshan,
Yes, there is a possibility for round-shaped cross section in PCBs.
The Multiwire solution has been available for quite a while.
A Google search for these terms will give you some descriptions.

Thanks
istvan





Zeeshan Siddiqi wrote On 08/29/07 11:41,:

>Are they teaching SI in college now? wow, times have
>changed.
>
>other than a co-axial setup, do we have any occurances
>of having a circular trace on a PCB? trapeziodal yes,
>but maybe some fab folks can enlighten us.
>thanks in advance.
>
>-zeeshan
>
>
>
>--- steve weir <weirsi@xxxxxxxxxx> wrote:
>
>  
>
>>That sounds like a homework question.  You can
>>answer it by determining 
>>what properties would you expect to change by
>>changing the cross-section 
>>shape.  Then determine whether those property
>>changes will impact your SI.
>>
>>Steve.
>>Paniraj G. wrote:
>>    
>>
>>>Hi Gurus,
>>> 
>>>
>>>I am relatively new to PCBs and SI. I have a small
>>>      
>>>
>>query on the PCB trace
>>    
>>
>>>shapes.
>>>
>>>Currently the PCB trace cross-sections are
>>>      
>>>
>>rectangular (may not be exact due
>>    
>>
>>>to process constraints).
>>>
>>>If the cross-section happens to be circular, what
>>>      
>>>
>>affect it will have on the
>>    
>>
>>>SI( any Pros and Cons).
>>>
>>> 
>>>
>>>Regards,
>>>
>>>Paniraj G
>>>
>>> 
>>>
>>> 
>>>
>>>
>>>
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