Harold Hallikainen wrote:
> I've always thought it would be interesting to do "build up" boards with
> an inkjet of conductive ink and insulating ink. You'd put down one layer,
> then cover the traces with a slightly wider insulating layer, then put
> down your next layer, etc. The trick is connecting components to the
> conductive ink.

Cf. 
<http://fabathome.org/wiki/index.php?title=Fab%40Home:Embedded_Circuits>.
-- 
Timothy J. Weber
http://timothyweber.org
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