• Title/Summary/Keyword: Organic and inorganic substrate

Search Result 111, Processing Time 0.038 seconds

Preparation and Characterization of a Layered Organic-inorganic Composite by the Electrophoretic Deposition of Plate-shaped Al2O3 Particles and Electrophoretic Resin (전기영동적층법을 통한 판상 알루미나 입자와 전기영동 수지의 배향 유무기 복합체 제조 및 물성평가)

  • Park, Hee Jeong;Lim, Hyung Mi;Choi, Sung-Churl;Kim, Younghee
    • Journal of the Korean Ceramic Society
    • /
    • v.50 no.6
    • /
    • pp.460-465
    • /
    • 2013
  • Plate-shaped inorganic particles are coated onto a stainless steel substrate by the electrophoretic deposition of a precursor slurry which includes the inorganic particles of $Al_2O_3$ and polymer resin in mixed solvents to mimic the abalone shell structure, which is a composite of plate-shaped inorganic particles and organic interlayer binding materials with a layered orientation. The process parameters of the electrophoretic deposition include the voltage, coating time, and conductivity of the substrate. In addition, the suspension parameters are the particle size, concentration, viscosity, conductivity, and stability. We prepared an organic-inorganic composite coating with a high inorganic solid content by arraying the plate-shaped $Al_2O_3$ particles and electrophoretic resin via an electrophoretic deposition method. We analyzed the effect of the slurry composition and the electrophoretic deposition process parameters on the physical, mechanical and thermal properties of the coating layer, i.e., the thickness, density, particle orientation, Young's modulus and thermogravimetric analysis results.

Barrier property Enhancement of Plastic Substrates for Flexible Display by Inorganic-organic Hybrid Multilayer

  • Kim, Hyun-Gi;Ryu, Hyun-Sun;Kim, Sung-Soo
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 2008.10a
    • /
    • pp.617-619
    • /
    • 2008
  • Inorganic-organic hybrid multilayers were formed on the plastic substrate to enhance the barrier properties of substrate to water vapor and oxygen transport. Plasma pretreatment of substrate with $Ar/O_2$ lead to adhesion improvement and the densification of inorganic layer on the substrates. Combination of $SiO_xN_y$ layer and silanenanoclay composite layer offered quite good barrier properties (WVTR and OTR) to PES substrate.

  • PDF

Fabrication of Flexible Inorganic/Organic Hybrid Thin-Film Transistors by All Ink-Jet Printed Components on Plastic Substrate

  • Kim, Dong-Jo;Lee, Seong-Hui;Moon, Joo-Ho
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 2008.10a
    • /
    • pp.1463-1465
    • /
    • 2008
  • We report all-ink-jet printed inorganic/organic hybrid TFTs on plastic substrates. We have investigated the optimal printing conditions to make uniform patterned layers of gate electrode, dielectrics, source/drain electrodes, and semiconductor as a coplanar type TFT in a successive manner. All ink-jet printed devices have good mechanical flexibility and current modulation characteristic even when bent.

  • PDF

Characteristics of Organic Thin Film Transistors with Organic and Organic-inorganic Hybrid Polymer Gate Dielectric (유기물과 유무기 혼합 폴리머 게이트 절연체를 사용한 유기 박막 트랜지스터의 특성)

  • Bae, In-Seob;Lim, Ha-Young;Cho, Su-Heon;Moon, Song-Hee;Choi, Won-Seok
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.22 no.12
    • /
    • pp.1009-1013
    • /
    • 2009
  • In this study, we have been synthesized the dielectric layer using pure organic and organic-inorganic hybrid precursor on flexible substrate for improving of the organic thin film transistors (OTFTs) and, design and fabrication of organic thin-film transistors (OTFTs) using small-molecule organic semiconductors with pentacene as the active layer with record device performance. In this work OTFT test structures fabricated on polymerized substrates were utilized to provide a convenient substrate, gate contact, and gate insulator for the processing and characterization of organic materials and their transistors. By an adhesion development between gate metal and PI substrate, a PI film was treated using $O_2$ and $N_2$ gas. The best peel strength of PI film is 109.07 gf/mm. Also, we have studied the electric characteristics of pentacene field-effect transistors with the polymer gate-dielectrics such as cyclohexane and hybrid (cyclohexane+TEOS). The transistors with cyclohexane gate-dielectric has higher field-effect mobility, $\mu_{FET}=0.84\;cm^2/v_s$, and smaller threshold voltage, $V_T=-6.8\;V$, compared with the transistor with hybrid gate-dielectric.

Fabrication of Organic-Inorganic Superlattice Films Toward Potential Use For Gas Diffusion Barrier

  • Yun, Gwan-Hyeok;Muduli, Subas Kumar;Seong, Myeong-Mo
    • Proceedings of the Korean Vacuum Society Conference
    • /
    • 2012.08a
    • /
    • pp.394-394
    • /
    • 2012
  • We fabricated organic-inorganic superlattice films using molecular layer deposition (MLD) and atomic layer deposition (ALD). The MLD is a gas phase process in the vacuum like to atomic layer deposition (ALD) and also relies on a self-terminating surface reaction of organic precursor which results in the formation of a monolayer in each sequence. In the MLD process, 'Alucone' is very famous organic thin film fabricated using MLD. Alucone layers were grown by repeated sequential surface reactions of trimethylaluminum and ethylene glycol at substrate temperature of $80^{\circ}C$. In addition, we developed UV-assisted $Al_2O_3$ with gas diffusion barrier property better than typical $Al_2O_3$. The UV light was very effective to obtain defect-free, high quality $Al_2O_3$ thin film which is determined by water vapor transmission rate (WVTR). Ellipsometry analysis showed a self-limiting surface reaction process and linear growth of each organic, inorganic film. Composition of the organic films was confirmed by infrared (IR) spectroscopy. Ultra-violet (UV) spectroscopy was employed to measure transparency of the organic-inorganic superlattice films. WVTR is calculated by Ca test. Organic-inorganic superlattice films using UV-assisted $Al_2O_3$ and alucone have possible use in gas diffusion barrier for OLED.

  • PDF

Development of Organic-Inorganic Hybrid Dielectric for Organic Thin Film Transistors

  • Jeong, Sun-Ho;Kim, Dong-Jo;Lee, Sul;Park, Bong-Kyun;Moon, Joo-Ho
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 2006.08a
    • /
    • pp.1115-1118
    • /
    • 2006
  • Using a thermally-crosslinkable organosiloxane-based organic-inorganic hybrid material, solution processable gate dielectric layer for organic thin-film transistors (OTFTs) have been fabricated. The hybrid dielectrics are synthesized by the sol-gel process, followed by the heat-treatment at $190{\bullet}\;.{\bullet}$ To investigate the electrical property of hybrid dielectric, leakage current behavior and capacitance were measured. To fabricate coplanar-type OTFTs, Au/Cr electrode was deposited onto the heavily doped silicon substrate with the organic-inorganic hybrid dielectric layer and then ${\alpha},{\omega}-dihexylquaterthiophene$ was drop-cast between source and drain electrical performance of the fabricated transistor.

  • PDF

A Study on Properties of PVA/$SiO_2$ Organic-inorganic Hybrid Materials Barrier Layer Coated on Flexible Substrate (PEN)

  • Koo, Tae-Wook;Farva, Umme;Yu, Eric S.H.;Kim, Yun-Su;Park, Chin-Ho
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 2008.10a
    • /
    • pp.657-659
    • /
    • 2008
  • Barrier coating properties of PVA/$SiO_2$ on the flexible substrates (PEN) have been investigated. Thin layer of PVA/$SiO_2$ organic-inorganic hybrid materials were deposited on PEN substrate by the spin-coating. The optical properties and surface roughness of barrier layer on flexible substrate were characterized by AFM, UV-Vis and WVTR/ OTR.

  • PDF

Molecular-scale Structure of Pentacene at Functionalized Electronic Interfaces

  • Seo, Soon-Joo;Peng, Guowen;Mavrikakis, Manos;Ruther, Rose;Hamers, Robert J.;Evans, Paul G.;Kang, Hee-Jae
    • Proceedings of the Korean Vacuum Society Conference
    • /
    • 2011.02a
    • /
    • pp.299-299
    • /
    • 2011
  • A dipolar interlayer can cause dramatic changes in the device characteristics of organic field-effect transistors (OFETs) or photovoltaics. A shift in the threshold voltage, for example, has been observed in an OFET where the organic semiconductor active layer is deposited on SiO2 modified with a dipolar monolayer. Dipolar molecules can similarly be used to change the current-voltage characteristics of organic-inorganic heterojunctions. We have conducted a series of experiments in which different molecular linkages are placed between a pentacene thin film and a silicon substrate. Interface modifications with different linkages allow us to predict and examine the nature of tunneling through pentacene on modified Si surfaces with different dipole moment. The molecular-scale structure and the tunneling properties of pentacene thin films on modified Si (001) with nitrobenzene and styrene were examined using scanning tunneling spectroscopy. Electronic interfaces using organic surface dipoles can be used to control the band lineups of a semiconductor at organic/inorganic interfaces. Our results can provide insights into the charge transport characteristics of organic thin films at electronic interfaces.

  • PDF

Synthesis and Etch Characteristics of Organic-Inorganic Hybrid Hard-Mask Materials (유-무기 하이브리드 하드마스크 소재의 합성 및 식각 특성에 관한 연구)

  • Yu, Je-Jeong;Hwang, Seok-Ho;Kim, Sang-Bum
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.12 no.4
    • /
    • pp.1993-1998
    • /
    • 2011
  • Semiconductor industry needs to have fine patterns in order to fabricate the high density integrated circuit. For nano-scale patterns, hard-mask is used to multi-layer structure which is formed by CVD (chemical vaporized deposition) process. In this work, we prepared single-layer hard-mask by using organic-inorganic hybrid polymer for spin-on process. The inorganic part of hard-mask was much easier etching than photo resist layer. Beside, the organic part of hard-mask was much harder etching than substrate layer. We characterized the optical and morphological properties to the hard mask films using organic-inorganic hybrid polymer, and then etch rate of photo resist layer and hard-mask film were compared. The hybrid polymer prepared from organic and inorganic materials was found to be useful hard-mask film to form the nano-patterns.