AVS 47th International Symposium
    Electronics Tuesday Sessions
       Session EL-TuP

Paper EL-TuP16
Structure Effects of Pendant Groups on Dielectric Constant and Thermal Properties of Polyimides

Tuesday, October 3, 2000, 5:30 pm, Room Exhibit Hall C & D

Session: Poster Session
Presenter: L.-Y. Wang, National Taiwan University
Authors: L.-Y. Wang, National Taiwan University
P. Chang, Chung-Yuan University, Taiwan
C.-L. Cheng, Chung-Yuan University, Taiwan
Correspondent: Click to Email
Polyimides exhibit high thermal and mechanical properties, are easily processable as thin films from soluble precursors, and have desirable dielectric properties. In this study, we investigate the structure-property on a series of polyimides which contain alkyl side groups. Two series of high molecular weight polyimides have been synthesized by the reaction of benzophenonetetracarboxylic dianhydride (BTDA) or hexafluoroisopropylidene bis(phthalic anhydride) (6FDA) with 4,4’-methylenedianiline (MDA), 4,4’-methylene-bis-(2,6-dimethylaniline) (MBDMA), 4,4’-methylene-bis-(2,6-diethylaniline) (MBDEA) or 4,4’-methylene-bis-(2,6-diisopropylaniline) (MBDIA). The introduction of fluorine into polyimides may vary free volume and polarizability and effect dielectric constant and thermal properties. The introduction of different side groups may change free volume and effect dielectric property. In this research, a detailed structure effect on the dielectric constant and thermal properties of polyimides containing alkyl side groups will be illustrated.