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| From [log in to unmask] Mon Nov 4 09: |
50:05 1996 |
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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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