some time immersion silver not have self-limiting


 --- R Sedlak <[log in to unmask]> 的訊息：
> Immersion silvers are self-limiting, and always much
> thinner than ED.
> They vary from 5-10 millions of an inch.
>
> Rudy Sedlak
>
> Eric Kalgren <[log in to unmask]> wrote:
> Good morning TechNet,
>
>
>
> One of our drawings for an RF PCB calls out "Silver
> Plate per QQ-S-365,
> electrodeposited, Type I, 0.0003" thk." The supplier
> that we are
> getting quotes from says he can't do electrodeposit
> and wants to supply
> immersion silver boards.
>
>
>
> Are these two processes equivalent? I searched the
> archives and cannot
> find any references to ED silver. Has immersion
> replaced this process?
> (Our drawing is pretty old.)
>
>
>
> The board material is Duroid 5880. would this make a
> difference?
>
>
>
> Thanks for your help!
>
>
>
> Eric Kalgren
>
> Manufacturing Engineer
>
> Atlantic Microwave
>
> Phone: 978-779-7062
>
> Fax: 978-779-0101
>
>
>
>
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