[SI-LIST] Re: Cu Thickness
- From: steve weir <weirsi@xxxxxxxxxx>
- To: sunil_bharadwaz@xxxxxxxxx
- Date: Sun, 15 Jul 2007 22:36:44 -0700
Sunil, Electrically 2oz on power / ground layers will not create
issues. Physically you will be constrained to wider traces and
clearances on the 2oz layers than on 1oz. Depending on your stack up
you may also face warpage, cost, and yield issues.
Steve.
sunil bharadwaz wrote:
> Hi Experts ,
> I have been doing mixed signal boards , Digital , Analog & RF .RF up to
> 5 Ghz.No big issues so far.
>
> We are planning to do similar kind of boards with a new SOC.There is
> a concern regarding the IR drop as most of the permissible margins are
> eaten away at the package & chip levels.
>
> To mitigate this effect to a larger extent , the plan is to use 2 Ounce &
> higher levels of Cu thickness.So far we have been doing the mixed signal
> boards with Cu thickness of 1 Oz.
>
> Could there be any issues with this approach for the mixed signal boards ?
>
> Appreciate any inputs in this regards.
>
> Best Regards
> Sunil.B
>
>
>
>
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