FreeLists / si-list / [SI-LIST] Re: power layer question

[steve weir <weirsi@xxxxxxxxxx>]

Ma, layer positions don't make much sense in isolation.  Unless you have a=
=20
specific reason to try and isolate those planes, the distance doesn't=20
matter much.  One comment though is that 2oz is very heavy for internal=20
layers.  It won't do you much good for current carrying above 1MHz.  If you=
=20
are using to shield down to 1MHz, that is another issue.

Steve.
At 11:17 AM 7/6/2005 -0700, ma mu wrote:
>Hi all,
>
>In my low speed board's(62 MHz) stack up , I have 2
>power
>plane which are like that :
>
>layer 5( +3.3V)  2 oz Cu
>
>layer6(VIO)      2 oz cu
>
>The distance between the layers is 14 mil . I could
>increase the distance , may be 20/ 25  mil . so
>my question is which will be the best choice?
>
>
>
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