Molecular Dynamics Study on the Effect of Lattice Mismatch on Adhesion Strength between Ceramics and Organic Materials
Tomio IWASAKI
Abstract:This paper describes a molecular-dynamics study on the relationship between lattice mismatch and adhesion strength of interfaces between organic materials and ceramics. Aromatic resins with benzene-ring (phenyl-ring) connected structures are used as examples of organic materials. A lattice constant of the aromatic resins is defined as the distance between the second-nearest-neighbor carbon atom pairs of a benzene ring (phenyl ring). The value of the lattice constant of a wholly aromatic polyester resin is about 0.24 nm. On the other hand, a lattice constant of ceramics is defined as the distance between the nearest neighbor atoms in the crystal plane connected with the resin. The lattice constants of the SiO2(111) and TiO2(111) planes are about 0.253 nm and 0.295 nm, respectively. The adhesion of aromatic polyester resin with the SiO2(111) plane is stronger than that with the TiO2(111) plane because the lattice mismatch of the resin with the SiO2(111) plane is smaller than that with the TiO2(111) plane. Reducing the lattice mismatch is found to be effective in strengthening the adhesion. Key Words:Adhesion Strength, Resin, Thin Film, Interface, Lattice Mismatch, Interconnection