At 04:31 AM 9/15/2010, you wrote:
>I was thinking of polyimide type circuits. I believe these are the=20
>type used in such things as cameras. I was hoping that it would be=20
>more easily shaped into place than FR4. One of my constraints is=20
>that placing the circuits in the 'housing' will be done by untrained=20
>people (electronically untrained that is). Reflowing after bending=20
>is not an option. My feeling is that an FR4 board will tend to bend=20
>everywhere thus putting stress on components, where a polyamide=20
>board will bend where it is easiest to do so (not under=20
>components?). There are areas where I know there will be less=20
>bending, so once I place the bulk of components there, I should be=20
>OK. The 12f675 has a big footprint though. Sadly I only need 4/6=20
>inputs & little processing power. I may find it worthwhile to look=20
>at other options. Size & power are most important to me in this=20
>case. Once in place, the circuit will not be moving.
>
>I think I'll also have to do double sided PTH.
>
>Joe

You might want to consider rigid flex. Like the bottom photo on this page:

http://fpcsales.com/

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the rewar=
d"
speff@interlog.com             Info for manufacturers: http://www.trexon.co=
m
Embedded software/hardware/analog  Info for designers:  http://www.speff.co=
m



--=20
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