Eric:

If you're referring to .059" FR-4, I would agree with you.  Most double sided fabricators are capable of
fabricating .031" or .025" PTH boards.  If you deal with a board house capable of fabricating buried vias
(sequential lamination) or thin cards, the lower limit of your choices should be even lower with FR-4.

Feel free to contact me off line for more detailed information.

Don Vischulis
[log in to unmask]

Eric Christison wrote:

> I want to use a rigid PCB in an extremely small device. The thickness of FR4 is
> too great to allow it's use. What else is commercially available (ie cheap and
> available in quantity)  that's thinner and how thin can I get?
>
> Regards,
>
> Eric Christison
> Mechanical Engineer
> VLSI Vision Ltd
> Aviation House
> 31 Pinkhill
> Edinburgh
> EH12 7BF
>
> Tel:    +44 (0) 131 539 8165
> Fax:    +44 (0) 131 539 7141
> A company of the STMicroelectronics Group

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