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| From [log in to unmask] Thu Nov 7 13: |
24:30 1996 |
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Hawk Chen wrote:
>
> Hawk Chen wrote:
> >
> > question 1 :
> >
> > to manufacture fine line PWB, if there is limited by mechanical force
> > (ex. scrubbing)
> >
> > to prepare the copper surface before outer layer dry film process. if
> > there is.
> >
> > what is the ultimate ? how fine can it prepare by scrubbing way.
> >
> > whether is it by Belt sanding way better or more economical by scrubbing
> > way. because
> >
> > the belt sanding equipment is very expensive.
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