| 초록 |
We report on novel polymer nanocomposite dielectrics based on n-octadecylphosphonic acid (ODPA) functionalized aluminum titanate (Al2TiO5) nanoparticles as dopants in crosslinkable polyimide (PI). The hydroxyl group containing polyimide (DOCDA-6FHAB) polymer was synthesized through a simple one step condensation polymerization using the monomers, DOCDA and 6FHAB. We introduced the Al2TiO5 to make high dielectric constant. To avoid the large leakage current and low breakdown strength, control over the particle-particle interaction and particle-polymer interface is essential. In addition, we used crosslinked poly(4-vinylphenol) as capping layer on nanocomposite layer to further improve leakage current and surface roughness. Polyimide nanocomposite characterized such as chemical structures, surface roughness, capacitance, etc. Polyimide nanocomposite bilayer film showed high dielectric constant 5.62 and low leakage current density 10-7 A/cm2 in MIM devices. |
