Improvements and recent advances in nanocomposite capacitors using a colloidal technique

摘要

In this work, a colloidal technique is used to improve the dielectric properties of nanocomposite materials and to achieve thin film deposition (>5 /spl mu/m) on large area substrates using meniscus coating. Using this technique, improved particle dispersion is achieved, which in turn allows for higher volume loading (increased dielectric constant), small variation of dielectric constant across the substrate, and thin-film deposition with lower particle-induced defects. Appropriate dispersants and fillers particularly applicable to meniscus coating of these composite materials were found which allowed the coated and cured composite material to attain high relative dielectric constant (typical 40). Non-meniscus-coated samples with dielectric constants as high as 74 were achieved by varying the particle size distribution.