Ultrathin Films from Fluorine Containing Polymers: Fabrication and Characterization

Onah, Ejembi J.; Oertel, Ulrich; Froeck, Christian; Kratzmüller, Thomas; Steinert, Volker; Bayer, Thomas; Hartmann, Lutz; Häußler, Liane; Lunkwitz, K.

doi:10.1002/1439-2054(20020601)287:6<412::aid-mame412>3.0.co;2-v

Cited by 10 publications

(19 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…), most recently, forming LB films30 and spin coating31–35 have been reported to favor the formation of PVDF thin films containing the β ‐crystalline phase. Moreover, for microelectronics applications, the well‐established spin‐coating method has been considered to be more suitable for fabricating smooth polymeric coatings on flat substrates36 on an industrial scale35 than the LB technique, which is generally considered to be time‐consuming37 and difficult when fabricating films of fluorine‐containing polymers, due to their rigidity and hydrophobicity 38…”

Section: Introductionmentioning

confidence: 99%

Direct Preparation of Nanoscale Thin Films of Poly(vinylidene fluoride) Containing β‐Crystalline Phase by Heat‐Controlled Spin Coating

Ramasundaram

Soon-Ock

Kim

et al. 2008

Macro Chemistry & Physics

106

View full text Add to dashboard Cite

Nanoscale thin films of PVDF containing the β‐crystalline phase were directly prepared by heat‐controlled spin coating without the influence of external stimuli either in the form of additives or post‐treatments. Sample preparation was carried out at different temperatures, ranging from 10 to 70 °C. At elevated temperatures (40, 50, 60 and 70 °C), PVDF was crystallized into the β‐phase, while at near‐ambient conditions (20 and 30 °C) it was crystallized into the α‐phase. Some samples exhibited a phase‐segregated morphology, with varying particle sizes depending on the preparation temperature. The ferroelectric nature of a typical sample, prepared at 40 °C, was visualized by piezoresponse imaging studies.magnified image

show abstract

Section: Introductionmentioning

confidence: 99%

Direct Preparation of Nanoscale Thin Films of Poly(vinylidene fluoride) Containing β‐Crystalline Phase by Heat‐Controlled Spin Coating

Ramasundaram

Soon-Ock

Kim

et al. 2008

Macro Chemistry & Physics

106

View full text Add to dashboard Cite

show abstract

“…Insulating materials with dielectric constants as small as possible are preferred to achieve maximum possible device speed through smaller dimensions 2. With increasing demand on the conventional polyimide (CPI) films with low dielectric constant, some methods have been reported, for example by Simpson and St. Clair,11 to prepare films with lower dielectric constant 3–5, 7, 9–15. One of these methods is achieved by processing large substitution groups, which is free volume in a molecular skeleton thus lowering values of both ϵ atomic and ϵ dipolar 7, 9, 11.…”

Section: Introductionmentioning

confidence: 99%

Electrical properties of conventional polyimide films: Effects of chemical structure and water uptake

Deligöz

Yalçınyuva

Özgümüş

et al. 2006

J of Applied Polymer Sci

View full text Add to dashboard Cite

A series of conventional polyimide (CPI) films, based on pyromellitic dianhydride (PMDA) and benzophenonetetracarboxylicdianhydride (BTDA), were prepared by a two step process, and their dielectrical constant, dielectrical loss, and DC conduction behaviors were studied at different frequencies and voltages. Their dielectrical breakdown voltage, water uptake, and solubility properties were also investigated. The effects of chemical structure and water uptake on the electrical properties of the films are discussed in detail. The dielectric constants of the CPI films vary between 2.93 and 3.72 at 1 MHz frequency and they are in the following decreasing order: BTDA-DDS Ͼ BTDA-DDE Ͼ PMDA-DDS Ͼ PMDA-DDE. The structure and thermal and oxidative stability of films were analyzed by FTIR-ATR and TGA, respectively. The results showed that all CPI films have good insulating properties, such as high dielectric breakdown voltage, low dielectric constant with stability for long period of frequency, and low leakage density. Our results concerning electrical properties also suggest that electron hopping is responsible for AC conduction and Poole-Frenkel mechanism is predominant for DC conduction of all CPI films.

show abstract

“…N-arylmaleimides show a stronger tendency towards formation of alternating copolymer structures with respect to the N-alkyl derivatives [36,37], although strictly alternating copolymers are hardly obtained even in the presence of fluorinated substituents [38,39] and are best achieved by functional conversion of alternating precursors such as poly(maleic anhydride-alt-ethylene), e.g. with an amine [40,41]. The presence of the aromatic groups imparts a higher conformational rigidity, that is higher T g , and increased photochemical sensitivity with respect to the aliphatic analog.…”

Section: Polyolefin Fluorination Through Free-radical Grafting Of Flumentioning

confidence: 99%

Synthesis and reactivity of a fluorinated N-alkylmaleimide towards free-radical grafting and polymerization reactions

Castelvetro

Aglietto

Ciardelli

et al. 2004

Journal of Fluorine Chemistry

View full text Add to dashboard Cite

Ultrathin Films from Fluorine Containing Polymers: Fabrication and Characterization

Cited by 10 publications

References 13 publications

Direct Preparation of Nanoscale Thin Films of Poly(vinylidene fluoride) Containing β‐Crystalline Phase by Heat‐Controlled Spin Coating

Direct Preparation of Nanoscale Thin Films of Poly(vinylidene fluoride) Containing β‐Crystalline Phase by Heat‐Controlled Spin Coating

Electrical properties of conventional polyimide films: Effects of chemical structure and water uptake

Synthesis and reactivity of a fluorinated N-alkylmaleimide towards free-radical grafting and polymerization reactions

Contact Info

Product

Resources

About