Journal ArticleDOI
High performance polyimides for applications in microelectronics and flat panel displays
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TLDR
In this article, a review of the recent research progresses in characterizing polyimides and their precursors and in developing low dielectric constant, light-emitting, and liquid crystal alignment layer PIs is presented.Abstract:
Polyimides (PIs) exhibit excellent thermal stability, mechanical, dielectric, and chemical resistance properties due to their heterocyclic imide rings and aromatic rings on the backbone. Due to these advantageous properties, PIs have found diverse applications in industry. Most PIs are insoluble because of the nature of the high chemical resistance. Thus, they are generally used as a soluble precursor polymer, which forms complexes with solvent molecules, and then finally converts to the corresponding polyimides via imidization reaction. This complexation with solvent has caused severe difficulty in the characterization of the precursor polymers. However, significant progress has recently been made on the detailed characterization of PI precursors and their imidization reaction. On the other hand, much research effort has been exerted to reduce the dielectric constant of PIs, as demanded in the microelectronics industry, through chemical modifications, as well as to develop high performance, light-emitting PIs and liquid crystal (LC) alignment layer PIs with both rubbing and rubbing-free processibility, which are desired in the flat-panel display industry. This article reviews this recent research progresses in characterizing PIs and their precursors and in developing low dielectric constant, light-emitting, and LC alignment layer PIs.read more
Citations
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Journal ArticleDOI
Electrospun polyimide nanofibers and their applications
TL;DR: Aromatic polyimides (PIs) are high-performance polymers with rigid heterocyclic imide rings and aromatic benzene rings in their macromolecular backbones as mentioned in this paper.
Journal ArticleDOI
Synthesis, characterization, and properties of fully aliphatic polyimides and their derivatives for microelectronics and optoelectronics applications
TL;DR: In this paper, the recent research process in synthesizing fully aliphatic polyimides, with improved dimensional stability, high transparency and low e values, as well as the characterizations and future scope for their application in micro electric and photo-electronic industries, is reviewed.
Journal ArticleDOI
Recent Progress in Aromatic Polyimide Dielectrics for Organic Electronic Devices and Circuits.
TL;DR: A brief overview of recent progress in PI-based dielectrics for organic electronic devices and circuits is provided and an outlook of future research directions and challenges for polyimide dielectric materials is presented.
Journal ArticleDOI
Triptycene Polyimides: Soluble Polymers with High Thermal Stability and Low Refractive Indices
TL;DR: A series of thermally stable aromatic polyimides were synthesized using commercially available five and six-membered ring anhydrides and 2,6-diaminotriptycene derivatives as mentioned in this paper.
Journal ArticleDOI
Novel low-κ polyimide/mesoporous silica composite films: Preparation, microstructure, and properties
Jingjing Lin,Xiaodong Wang +1 more
TL;DR: In this article, a series of low-dielectric constant polyimide (PI) composite films containing SBA-15 or SBA16 type mesoporous silica were successfully prepared via in situ polymerization and following thermal imidization.
References
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Journal ArticleDOI
Alignment of Liquid Crystals by Grooved Surfaces
TL;DR: This article observed alignment of nematic, cholesteric and smectic liquid crystals in directions depending on the orientation of submicroscopic, parallel grooves in adjacent glass and fused quartz surfaces.
Journal ArticleDOI
Ultralow- k nanoporous organosilicate dielectric films imprinted with dendritic spheres
TL;DR: The preparation of low- and ultralow-k nanoporous organosilicate dielectrics from blends of polymethylsilsesquioxane precursor with globular ethyl acrylate-terminated polypropylenimine dendrimers, which act as porogens are described, which should prove very useful in advanced integrated circuits.
Journal ArticleDOI
What is the lowest refractive index of an organic polymer
W. Groh,A. Zimmermann +1 more
TL;DR: In this paper, the theoretical lower limit of the refractive index of organic polymers was investigated using the Lorenz-Lorentz equation, starting from an extended data base, optimized refractive and density increments for functional groups were evaluated.