8mil for class2 is a large width. Some PCB houses accept minimum with
of 3.5mil, I have always used 4mil width with 4 mil isolation, but
that depends of circuit complexity and package pitch.

On 3/26/08, Hong Yu <zyu@controls.com> wrote:
>  We always use 8 mil minimum in our PCB, recently there is some
> contamination found, does anyone know a resource of such a topic in the
> title?
>
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