Application of Complex Macromolecular Architectures for Advanced Microelectronic Materials

Abstract

The distinctive features of well‐defined, three‐dimensional macromolecules with topologies designed to enhance solubility and amplify end‐group functionality facilitated nanophase morphologies in mixtures with organosilicates and ultimately nanoporous organosilicate networks. Novel macromolecular architectures including dendritic and star‐shaped polymers and organic nanoparticles were prepared by a modular approach from several libraries of building blocks including various generations of dendritic initiators and dendrons, selectively placed to amplify functionality and/or arm number, coupled with living polymerization techniques. Mixtures of an organosilicate and the macromolecular template were deposited, cured, and the phase separation of the organic component, organized the vitrifying organosilicate into nanostructures. Removal of the sacrificial macromolecular template, also denoted as porogen, by thermolysis, yielded the desired nanoporous organosilicate, and the size scale of phase separation was strongly dependent on the chain topology. These materials were designed for use as interlayer, ultra‐low dielectric insulators for on‐chip applications with dielectric constant values as low as 1.5. The porogen design, chemistry and role of polymer architecture on hybrid and pore morphology will be emphasized.

Synthesis of Polymer Brushes Using Atom Transfer Radical Polymerization

“…[1] Molecular brushes that are spherical in nature have been synthesized by ATRP of various methacrylates from a multifunctional dendrimer core. The synthesis and application of these dense linear [137] and spherical molecular brushes as porogens toward the preparation of low k dielectric materials for microelectronic applications have been extensively studied by Hedrick and Miller et al [62,63,138,139] …”

Dimethylaluminum complexes bearing a chiral diketiminate ligand: Synthesis, characterization and ring-opening polymerization of ε-caprolactone

“…It is widely applied in different fields such as scaffolds in tissue engineering [2], in long-term drug delivery systems [3], in microelectronics [4], as adhesives [5], and in packaging [6]. PCL is usually prepared by the ring-opening polymerization (ROP) of ε-caprolactone (ε-CL) initiated by metal complexes [1].…”

1,3-Bis(2,6-diisopropylphenyl)-2-trichloromethylimidazolidine

“…Although carbenes are typically used as ligands for transition metals [11][12][13][14][15], or as nucleophilic organic catalysts [16][17][18][19][20][21][22][23][24][25], these carbene derivatives that contain an (H)CCl3 bound at the carbene C2 position have been found through reductive thermolysis, to give free carbene for reaction with metals [26].…”