POS2-1258
Synthesis and Characterization of Spiro-Structured Polyimides for Reduced Dielectric Constant
Topic
S2. High-End Characterization/Polymer Physics/Properties
When and Where
Sep 29, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Hae Jung SON
Boseok KANG
Presenter(s)
Juhyeon LEE (Yeungnam university)
Co-Author(s)
Abstract
With the development of ultralarge-scale integrated circuits (ULSIs) and the shrinkage of feature sizes, interconnected time delay, crosstalk, and power dissipation have become critical bottlenecks limiting the performance of high-speed, low-power microelectronics. To address these challenges, replacing traditional SiO₂ with innovative low-dielectric constant (k) materials is highly demanded. In this study, a series of novel low-dielectric spiro-structured polyimides were successfully synthesized via the polycondensation of 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) with four distinct spiro-centered diamines containing ether or ester linkages. According to the Clausius-Mossotti equation, minimizing molecular polarizability and maximizing molar volume are fundamental to lowering the dielectric constant of polymer matrices. Guided by this relationship, the bulky, rigid spiro-skeletons combined with the fluorinated 6FDA moieties effectively disrupted chain packing and significantly increased the free volume, successfully achieving low dielectric constants. The resulting polymers were systematically characterized by NMR, FT-IR, DSC, TGA, and dielectric measurements to elucidate their structure–property relationships.
