I have seen SMT on FR4 boards so thin that you can treat it like flex.

> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of DeVaul, Tim
> Sent: Monday, January 19, 2004 11:55 AM
> To: [log in to unmask]
> Subject: [TN] PC Board Thickness Requirements
>
>
> I have a question in regards to PCB thickness. I seem to
> remember somewhere that that was a minimum requirement for
> board thickness when you apply SMD technology.
>
> Is that a true requirement? Could anyone tell me where to
> find the requirement if it does exist?
>
>
> Thanks,
>
> Tim

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