Highly Condensed Epoxy−Oligosiloxane-Based Hybrid Material for Transparent Low-<i>k</i> Dielectric Coatings

Yang, SeungCheol; Kwak, Seung‐Yeon; Jin, Jungho; Bae, Byeong‐Soo

doi:10.1021/am900252v

Cited by 27 publications

(22 citation statements)

References 22 publications

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“…Given these characteristics, they have been studied for potential optical materials or electronic packaging materials. [8][9][10][11][12][13] Vinyl-oligosiloxane-based hybrid materials have been fabricated in previous studies by hydrosilylation. 5 The hybrimers have excellent transparency and a relatively higher refractive index (around 1.56) compared to conventional methyl-type silicone materials ($1.4).…”

Section: Introductionmentioning

confidence: 99%

A facile method for fabrication of titanium-doped hybrid materials with high refractive index

et al. 2014

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This paper presents a facile route to prepare a series of high refractive index and homogeneous hybrid resins with titanium in the backbone by a non-hydrolytic sol-gel process. The confirmation of the condensation reaction and the formation of Si-O-Ti hetero-metal bonds in the hybrid resins were conducted by FT-IR spectroscopy, FT-Raman spectroscopy and liquid state 29 Si-NMR spectroscopy. In addition, the molecular weight and molecular size of the hybrid resin were characterized by MALDI-TOF MS and small-angle X-ray scattering (SAXS), respectively. These results show that the content of Si-O-Ti bridges, condensation degree of precursors and molecular weight and size of these hybrid resins increase depending on the TPT content from 0 to 30%. Moreover, the refractive index of the hybrid resin varied from 1.57 to 1.62 with increasing TPT content and the hybrid resin was thermally cured by hydrosilylation in the presence of a Pt catalyst to fabricate a transparent TSR hybrid film. These experimental results demonstrated that the physical and chemical properties of these hybrid films, such as visible transparency, surface roughness and surface energy, dielectric constant, thermal stability and glass transition temperature were investigated as a function of the chemical composition.

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Section: Introductionmentioning

confidence: 99%

A facile method for fabrication of titanium-doped hybrid materials with high refractive index

et al. 2014

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“…The broad peak at 3400 cm -1 (Si-OH from the hydrolysis) and the band at 1150-1000 cm -1 (Si-O-Si) appear at FTIR spectra of G x D y , which indicates the occurrence of the hydrolysis and condensation of GPTMS and DMDES. Figure 3 presents the 29 Si NMR spectra of G x D y , the peaks at about -12, -20, -49, -58, and -68 ppm belong to SiO-Si-OH (D 1 ), SiO-Si-OSi (D 2 ), SiO-Si-(OH) 2 (T 1 ), (SiO) 2 -Si-OH (T 2 ) and Si-(OSi) 3 (T 3 ), [24][25][26] respectively, which indicates the completion of the hydrolysis and the occurrence of condensation of GPTMS and DMDES. The G 6 D 4 have the highest content of Si-(OSi) 3 (T 3 ), which can be interpreted that the content of Si-(OSi) 3 (T 3 ) in G x D y depended on the degree of condensation (DOC) and the content of GPTMS part in G x D y .…”

Section: Resultsmentioning

confidence: 99%

“…23,24 GPC: The molecular weight and polydispersity index of the polymers were determined on a Waters 1515-2414 gel permeation chromatography (GPC, Waters, USA) with cali- bration by polystyrene standards, and the measurements were carried out at 35 o C with tetrahydrofuran as the eluent at the rate of 1.0 mL min -1 . DSC: The differential scanning calorimetry (DSC) measurements were performed on a Pyris-1 thermal analysis apparatus (Diamond DSC, Perkin-Elmer, USA) in a dry nitrogen atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of LED-packaging epoxy resin toughened by a novel polysiloxane from hydrolysis and condensation

Liu

Gao

et al. 2011

Macromol. Res.

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A novel polysiloxane (G x D y ) containing a large number of epoxide groups and flexible segments was synthesized by hydrolysis and condensation of 3-glycidoxypropyl trimethoxysilane (GPTMS) and dimethyldiethoxylsilane (DMDES) to toughen the 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate (ERL-4221). The chemical structures of G x D y (molar ratio of GPTMS to DMDES is x/y) were confirmed by Fourier transform infrared spectroscopy (FTIR), 29 Si nuclear magnetic resonance spectroscopy (NMR), and gel permeation chromatography (GPC), and G 4 D 6 have the highest degree of branching. The thermal and mechanical properties, morphologies and transmittance of the cured epoxy resins were examined by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), tensile testing, fracture testing, SEM, and UV-vis spectroscopy. The T g of the G x D y modified epoxy depends on the structure and addition content of G x D y . The TGA results under a N 2 demonstrate that the thermal stability of the epoxy resin was improved by G x D y and the Si-(O-) 3 from the GPTMS part forms silica more easily than the Si-(O-) 2 from the DMDES part. The addition of 10 phr G 4 D 6 resulted in greatly improved toughness, but maintained the transmittance of the epoxy resin. In addition the morphology of the fracture surfaces showed that G x D y can be dispersed homogeneously in the epoxy resin, and the toughening follows the pinning and crack tip bifurcation mechanism. In conclusion, G x D y can increase the toughness and thermal properties of the ERL-4221 system simultaneously, and maintain its transmittance. Therefore, G x D y can be used as a toughening agent for light emitting diode (LED)-packaging epoxy resins.

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“…The content of experimented ES, FS, and DS was 35, 5, and 60 mol% of entire precursor, and the amount of Ba(OH) 2 H 2 O was 0.2 mol% of entire precursor. The molar ratio of ES and FS to DS was decided to be 2:3 in order to synthesize highly condensed FEO resin 40. FS, ES, DS, and Ba(OH) 2 ·H 2 O were reacted in a two‐neck flask with a magnetic stirrer under 80 °C with N 2 gas purging for 4 h.…”

Section: Methodsmentioning

confidence: 99%

Solution‐Processed, Photo‐Patternable Fluorinated Sol–Gel Hybrid Materials as a Bio‐Fluidic Barrier for Flexible Electronic Systems

Lee

Kim

Jang

et al. 2020

Adv Elect Materials

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Reports have recently been published on ultrathin biofluid barriers, which enable the long‐term measurement of biological signals and exhibit conformability on nonlinear surfaces such as skin and organs. However, inorganic‐ and organic‐based barriers have process incompatibility and high water permeability, respectively. Siloxane‐ (inorganic) based fluorinated epoxy (organic) hybrid materials (FEH) are demonstrated for bio‐fluidic barrier and the biocompatibility and barrier performance for flexible electronic systems as solution‐processed oxide thin‐film transistors (TFTs) on 1.2 µm thick polyimide (PI) thin film substrate is confirmed. FEH thin film can be patterned as small as 10 µm through conventional photolithography. The fabricated solution‐processed indium oxide TFTs with FEH barriers exhibit durable performance over 16 h with no dramatic change of transfer characteristics in phosphate‐buffered saline (PBS) environment. Furthermore, to realize FEH barriers for flexible systems, the solution‐processed indium oxide TFTs with FEH barriers on ultrathin PI substrate are demonstrated subjected to compression test and successfully measure the electrical properties with no irreversible degradation during 1000 cycles of mechanical testing in PBS.

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Highly Condensed Epoxy−Oligosiloxane-Based Hybrid Material for Transparent Low-k Dielectric Coatings

Cited by 27 publications

References 22 publications

A facile method for fabrication of titanium-doped hybrid materials with high refractive index

A facile method for fabrication of titanium-doped hybrid materials with high refractive index

Synthesis and properties of LED-packaging epoxy resin toughened by a novel polysiloxane from hydrolysis and condensation

Solution‐Processed, Photo‐Patternable Fluorinated Sol–Gel Hybrid Materials as a Bio‐Fluidic Barrier for Flexible Electronic Systems

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