Sunday, January 22, 2012

US Patent 8096263 - Inkjet printing of magnetic nanoparticles

Inkjet printing of nanoparticles has been under development over the past decade to provide inexpensive manufacture of conductive lines in microcircuitry. This patent from Samsung attempts to address the problem of nanoparticle dispersion during inkjet printing using a magnetic field generator. Claim 1 reads:

1. A circuit line forming device, comprising:

an inkjet head to eject a conductive ink onto one side of a substrate, the conductive ink containing nanoparticles comprising a ferromagnetic core and a conductive layer surrounding the ferromagnetic core; and

a magnetic field generator part, positioned on the other side of the substrate in correspondence with the inkjet head, wherein the magnetic field generator part comprises a power source and a coil receiving an electric current from the power source to form a magnetic field and applies a magnetic field on the conductive ink, when the conductive ink is ejected to form circuit lines.