FreeLists / si-list / [SI-LIST] Re: How to Route XFP 10G electrical trace?

[Kevin Ko <wy_k@xxxxxxxxx>]

Yee,

I asked similar question to a manufacture(I don't recall which) in 
DesignCon and he said that they custom make an XFP at a customer's 
request where a tiny area of insulation is deposited at the place where the
cut/routing occurs(on the top layer). You might want to check the xfp module
out  .

Kevin



--- Jeff Seeger <jseeger@xxxxxxxxxxxxxx> wrote:

> Msg: #4 in digest
> Subject: [SI-LIST] How to Route XFP 10G electrical trace?
> Date: Thu, 8 Mar 2007 11:14:50 -0600
> From: "CHUNG Yee" <Yee.Chung@xxxxxxxxxxxxxxxxxx>
> 
> > snip <
> > Based on internal discussion, we have some concern on the
> > rear EMI gasket of the XFP cage that might scratch-off the solder-mask
> > over time due to vibration hence short these traces to Gnd! However, I
> > have check various vendors test board and even the Intel reference test
> > board in the XFP MSA are using this method!
> > snip <
> 
>       Soldermask should not be relied upon as a mechanical
>       insulator, as your instincts incline.  This does not
>       stop the practice though, until a product gets fully
>       scrutinized with respect to a comprehensive spec.
> 
>       If the gasket can't be relieved in this exact area, I
>       would suggest a bit of Kapton tape where you cross it.
> 
> -- 
>  
>       Jeff Seeger                         Applied CAD Knowledge Inc
>       Chief Technical Officer                  Tyngsboro, MA  01879
>       jseeger "at" appliedcad "dot" com                978 649 9800
> 
> ------------------------------------------------------------------
> 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
>   
> 
> 



 
____________________________________________________________________________________
Never miss an email again!
Yahoo! Toolbar alerts you the instant new Mail arrives.
http://tools.search.yahoo.com/toolbar/features/mail/
------------------------------------------------------------------
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