[SI-LIST] Re: Impact on Copper Thieving on 10G Routing
- From: "Lee " <leeritchey@xxxxxxxxxxxxx>
- To: <Vikas.Khanna@xxxxxxx>, <jeff.loyer@xxxxxxxxx>, <sij99@xxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Fri, 7 Mar 2014 10:13:36 -0800
Not necessary to do this, but I am not surprised to hear that this idea is
still floating around. Unfortunately, there are many more misconceptions
like this floating around. Maybe, one day, we will get them all cleared up!
Meantime, keep asking questions and we will do our best to find good
answers.
-----Original Message-----
From: Khanna, Vikas
Sent: Friday, March 07, 2014 9:53 AM
To: jeff.loyer@xxxxxxxxx ; sij99@xxxxxxxxx ; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Impact on Copper Thieving on 10G Routing
Sometimes PCB fabricator will do copper balancing on inner layers to prevent
PCB from warping.
Vikas
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Loyer, Jeff
Sent: Friday, March 07, 2014 10:29 AM
To: sij99@xxxxxxxxx; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Impact on Copper Thieving on 10G Routing
As far as I know, thieving is placed so far away from traces that its
effects are insignificant. The exception I've seen has been where they put
thieving on dual stripline layers, but that is an egregious error. If in
doubt, you should call out "thieving keepout" areas in your design.
Note: though thieving is primarily a plating aid (as I understand it), I
have seen many vendors put thieving on inner layers. I would appreciate
anyone's informed insight into why it's sometimes used on inner layers, and
sometimes not. I suspect it's to reduce the amount of useless etching, but
haven't been able to get a definitive explanation.
Jeff Loyer
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Jack Si
Sent: Thursday, March 06, 2014 11:54 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Impact on Copper Thieving on 10G Routing
Hi Experts,
What are the major impact created by Copper Thieving in the 10G signals and
the precautions to avoid it.
Thanks and Regards,
Jack
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