Ultrathin Polyimide Films Research Articles

Summary Abstract: Characterization of ultrathin polyimide films (d∼11 Å) formed by vapor deposition of 4,4-oxidianiline and 1,2,4,5-benzenetetracarboxylic anhydride

Summary Abstract: Characterization of ultrathin polyimide films (<i>d</i>∼11 Å) formed by vapor deposition of 4,4-oxidianiline and 1,2,4,5-benzenetetracarboxylic anhydride

Preparation and adhesion of ultrathin polyimide films on polycrystalline silver

4.4-oxydianiline (ODA) and 1,2,3,5-benzenetetracarboxylic anhydride (PMDA) were deposited from the vapor phase onto a polycrystalline silver substrate and polymerization of the two components to form ultrathin polyimide films ( d≈ 11 Å) was followed by X-ray photoelectron spectroscopy. Both PMDA and ODA chemisorb on the clean surface under partial fragmentation. Co-deposition of ODA and PMDA followed by heating of the substrate led to formation of thermally stable ( T<450°C) polyimide films. Our data indicate that adhesion of the polyimide film to the surface involves chemical bonding to fragmented PMDA and/or ODA chemisorbed on the substrate. Our experiments show that polyimide films can be prepared sufficiently thin to allow the application of surface sensitive techniques to probe the substrate-polymer interface and to study the basic physics and chemistry of adhesion.

４Å厚ポリイミドＬＢ超薄膜の作製とその累積膜の特性

４Å厚ポリイミドＬＢ超薄膜の作製とその累積膜の特性