Thin-film transistor

About: Thin-film transistor is a research topic. Over the lifetime, 48425 publications have been published within this topic receiving 680879 citations. The topic is also known as: TFT.

Completely Printed, Flexible, Stable, and Hysteresis-Free Carbon Nanotube Thin-Film Transistors via Aerosol Jet Printing

Abstract: Nanomaterials offer an attractive solution to the challenges faced for low-cost printed electronics, with applications ranging from additively manufactured sensors to wearables. This study reports hysteresis-free carbon nanotube thin-film transistor (CNT-TFTs) fabricated entirely using an aerosol jet printing technique; this includes the printing of all layers: semiconducting CNTs, metallic electrodes, and insulating gate dielectrics. It is shown that, under appropriate printing conditions, the gate dielectric ink can be reliably printed and yield negligible hysteresis and low threshold voltage in CNT-TFTs. Flexible CNT-TFTs on Kapton film demonstrate minimal variations in performance for over 1000 cycles of aggressive bending tests. New insights are also gained concerning the role of charge trapping in Si substrate-supported devices, where exposure to high substrate fields results in irreversible degradation. This work is a critical step forward as it enables a completely additive, maskless method to fully print CNT-TFTs of direct relevance for the burgeoning areas of flexible/foldable, wearable, and biointegrated electronics.

Thin film device applications

Abstract: 1 Thin Film Technology An Introduction- 11 Why Thin Films?- 12 Thin Film Growth Process- 121 Structural Consequences of the Growth Process- 122 Solubility Relaxation- 13 Vapor Deposition Techniques- 131 Physical Vapor Deposition (PVD)- 132 Chemical Vapor Deposition (CVD)- 14 Solution Deposition Techniques- 141 Chemical Solution Deposition (CSD)- 142 Electrochemical Deposition (ECD)- 15 Thick Film Deposition Techniques- 151 Liquid-Phase Epitaxy (LPE)- 152 Screen Printing- 153 Melt Spinning- 154 Dip Coating, Spinning, and Solution Casting- 16 Monitoring and Analytical Techniques- 161 General Remarks- 162 Deposition Rate and Thickness Measurement- 163 Structural Analysis- 164 Composition Analysis- 17 Microfabrication Techniques- 2 Thin Films In Optics- 21 Optics of Thin Films- 22 Antireflection Coatings (AR Coatings)- 221 Single-Layer AR Coatings- 222 Double-Layer AR Coatings- 223 Multilayer and Inhomogeneous AR Coatings- 23 Reflection Coatings- 231 Metal Reflectors- 232 All-Dielectric Reflectors- 24 Interference Filters- 241 Edge Filters- 242 Band-Pass Filters- 25 Thin Film Polarizers- 26 Beam Splitters- 261 Polarizing Beam Splitter- 262 Dichroic Beam Splitter- 27 Integrated Optics- 271 Waveguides- 272 Thin Film Optical Components- 273 Passive Devices: Couplers- 274 Active Devices- 3 Optoelectronic Applications- 31 Introduction- 32 Photon Detectors- 321 Photoconductive Detectors- 322 Photoemissive Detectors- 33 Photovoltaic Devices- 331 Solar Cells: General Analysis- 332 Thin Film Solar Cells- 34 Applications in Imaging- 35 Electrophotography (Xerography and Electrofax)- 36 Thin Film Displays- 361 Electroluminescent (EL) Displays- 362 Electrochromic Displays- 37 Information Storage Devices- 371 Introduction- 372 Optical Hole Memories- 373 Holographic Memories- 38 Amorphous Silicon-Based Devices- 4 Microelectronic Applications- 41 Introduction- 42 Thin Film Passive Components- 421 Electrical Behavior of Metal Films- 422 Dielectric Behavior of Insulator Films- 423 Resistors- 424 Capacitors- 425 Inductors- 426 Conductors (Interconnections and Contacts)- 43 Thin Film Active Components- 431 Thin Film Transistor (TFT)- 432 Thin Film Diodes- 44 Thin Film Integrated Circuits- 45 Microwave Integrated Circuits (MICs)- 46 Surface Acoustic Wave (SAW) Devices- 461 Introduction- 462 SAW Transducer- 463 SAW Delay Line- 464 SAW Band-Pass Filter- 465 SAW Pulse-Compression Filter- 466 SAW Amplifier- 467 SAW Guiding Components- 468 Other Applications- 47 Charge-Coupled Devices (CCDs)- 471 Introduction- 472 Principle- 473 Applications- 48 Thin Film Strain Gauges- 49 Gas Sensors- 5 Magnetic Thin Film Devices- 51 Magnetic Thin Films- 511 Introduction- 512 Uniaxial Anisotropy (UA)- 513 Domains and Domain Walls- 514 Switching in Thin Films- 52 Applications- 521 Computer Memories- 522 Domain-Motion Devices- 523 Thin Film Magnetic Heads- 524 Magnetic Displays- 6 Quantum Engineering Applications- 61 Introduction- 62 Basic Concepts- 63 Superconductivity in Thin Films- 64 S-N Transition Devices- 641 Switching Devices- 642 Cryotron Amplifiers- 643 Computer Memory Devices- 65 Superconductive Tunneling Devices- 651 Quasiparticle (Giaever) Tunneling- 652 Pair (Josephson) Tunneling- 653 SQUIDs- 654 Applications of SQUIDs- 655 Superconducting Electronics- 66 Miscellaneous Applications- 7 Thermal Devices- 71 Introduction- 72 Thermal Detectors- 721 Bolometers and Thermometers- 722 Thermocouples and Thermopiles- 723 Pyroelectric Detectors- 724 Absorption-Edge Thermal Detectors- 73 Thermal Imaging Applications- 74 Photothermal Conversion- 741 Metallic Surfaces- 742 Metal-Semiconductor Tandems- 743 Metal-Semiconductor Mixed Coatings- 744 Interference Stacks- 745 Particulate Coatings- 746 Topological Coatings- 8 Surface Engineering Applications- 81 Introduction- 82 Surface Passivation Applications- 821 Coatings of Reaction Product- 822 Metallic Coatings- 823 Inorganic Coatings- 824 Organic Coatings- 83 Tribological Applications- 831 Wear-Resistant Coatings- 832 Lubricating Coatings- 84 Decorative Applications- 85 Miscellaneous Applications- 851 Adhesion-Promoting Coatings- 852 Preparation of Heterogeneous Catalysts- 853 Preparation of Nuclear Fuels- 854 Fabrication of Structural Forms- 855 Biomedical Applications- References

Fabrication of thin film effect transistor comprising an organic semiconductor and chemical solution deposited metal oxide gate dielectric

Abstract: A thin film transistor (TFT) device structure based on an organic semiconductor material, that exhibits a high field effect mobility, high current modulation and a low sub-threshold slope at lower operating voltages than the current state of the art organic TFT devices. A fabrication process for the same, especially a process for deposition of the gate insulator using chemical solutions. The structure comprises a suitable substrate disposed with the following sequence of features: a set of conducting gate electrodes covered with a high dielectric constant insulator, a layer of the organic semiconductor, sets of electrically conducting source and drain electrodes corresponding to each of the gate lines, and an optional passivation layer that can overcoat and protect the device structure. Use of high dielectric constant gate insulators exploits the unexpected gate voltage dependence of the organic semiconductor to achieve high field effect mobility levels at very low operating voltages. Judicious combinations of the choice of this insulator material and the means to integrate it into the TFT structure are taught that would enable easy fabrication on glass or plastic substrates and the use of such devices in flat panel display applications.

Patterning organic–inorganic thin-film transistors using microcontact printed templates

Abstract: We report the simple, low-cost, and parallel fabrication of patterned organic–inorganic thin-film transistors (TFTs) by microcontact printing a molecular template on the substrate surface prior to film deposition. We printed molecules with hydrophobic tail groups on the gate oxide surfaces of TFTs to chemically, differentiate the substrate surface and confine the self-assembly of thin films, deposited from solutions flooded across the entire surface, to the transistor channels. TFTs are fabricated with good device characteristics and no current leakage. This process is more general to the patterning of other solution-deposited thin-film materials.

Thin film transistor array having single light shield layer over transistors and gate and drain lines

Abstract: A TFT array has a plurality of gate lines and a plurality of drain lines formed on a transparent insulating substrate The gate lines intersect with the drain lines TFTs are formed at the intersections of the gate lines and the drain lines An opaque film is formed above the gate lines, the drain lines, and the TFTs, allowing no passage of light passing through the gaps between the transparent electrode, on the one hand, and the gate and drain lines, on the other hand Therefore, when the TFT array is incorporated into a liquid-crystal display, the display will display high-contrast images