> All,
>    I have been asked to build a circuit on flexible PCB.  The design does=
 not
> really need to flex but the PCB needs to be cylindrical. Think of it as p=
utting a
> small design on the outside of a roll of cellophane tape, with all of the
> devices facing outwards.  I have poked around the WEB and everything I
> have found so far is referring to flexible interconnect, not a flexible c=
ircuit.  I
> know that it is being done but I can not find a reference so that I can s=
tart my
> learning process.

Ha ha, we have a design like that. It was done with 0.5mm FR4 fibreglass bo=
ard that was then bent and glued into a former to hold its shape. It is a c=
ow of a thing to mount the components on.

If there is a possibility of redesign I want to rehash it using a flexi-rig=
id PCB so that the components are on ridged segments joined by flexi sectio=
ns. Then the components can be loaded while the PCB is flat.

--=20
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