Wednesday, August 22, 2007

US Patent 7259443 - Thermal transfer using a nanoparticle layer

Printing methods such as inkjet and imprinting are growing in popularity as tools for surface processing used in semiconductor and MEMS fabrication. This patent from E.I. du Pont teaches the formation of a thermal transfer media for such purposes using nanoparticles as high dielectric material. Claim 1 reads:

1. An article, comprising: a. a transparent, dimensionally stable substrate in sheet form; b. a transfer layer, comprising high dielectric constant nanoparticles dispersed in a solvent or a polymer matrix wherein the polymer matrix is selected from polyalcohols, polyamines, polyamides, and polyesters; and c. a heating layer located between the substrate and the transfer layer.