Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

As a side note, powered hot-melt adhesive would be hard to apply
evenly. If you only wanted to do bonding (without needing the
conductive additive) I would suggest using photo-mount paper available
from camera/photo supply stores. This is a very thin (probably about 1
or 2 milli-inches) sheet of hot-melt on a carrier release paper and
especially good on paper and archival mounting of photos in scrapbooks,
etc.

Another technique for conductive traces was to add graphite powder to
epoxy. Totally load the harder with graphite to form a paste then add
the other part (the resin) and use immediately. Adding the graphite to
the resin was not recommended as it could case the resin to harden. As
a thought, use a two-part urethane and add the graphite to it, and
screen print it. This is essentially what some some of the flexible LCD
flex connectors are, screen printed conductive graphite ink on plastic
(polyester or Kapton). You could also use a solvent based carrier
vehicle if you wanted to -- the key would be to really load it up with
graphite.

Regards,
Charles Patton