RF Characteristics of Room-Temperature-Deposited, Small Gate Dimension Indium Zinc Oxide TFTs
- 1 January 2008
- journal article
- Published by The Electrochemical Society in Electrochemical and Solid-State Letters
- Vol. 11 (3), H60-H62
- https://doi.org/10.1149/1.2825474
Abstract
Depletion-mode indium zinc oxide channel thin film transistors (TFTs) with gate dimension of and drain-to-source distance of were fabricated on glass substrates using radio frequency magnetron sputtering deposition at room temperature. Plasma-enhanced chemical vapor deposited was used as the gate insulator. The threshold voltage was around . Saturation current density at zero gate bias voltage was 2 mA/mm, and a maximum transconductance of 7.5 mS/mm was obtained at . The drain current on-to-off ratio was . The maximum field effect mobility measured in the saturation region was . A unity current gain cutoff frequency, , and maximum frequency of oscillation, of 180 and 155 MHz, respectively, were obtained. The equivalent device parameters were extracted by fitting the measured parameters to obtain the intrinsic transconductance, drain resistance, drain-source resistance, transit time, and gate-drain and gate-source capacitance.Keywords
This publication has 20 references indexed in Scilit:
- Room temperature deposited indium zinc oxide thin film transistorsApplied Physics Letters, 2007
- Effects of Zn content on structural and transparent conducting properties of indium-zinc oxide films grown by rf magnetron sputteringJournal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 2006
- ZnO thin-film transistors with polycrystalline (Ba,Sr)TiO3 gate insulatorsApplied Physics Letters, 2006
- High-performance ZnO thin-film transistors on gate dielectrics grown by atomic layer depositionApplied Physics Letters, 2006
- Transparent indium zinc oxide ohmic contact to phosphor-doped n-type zinc oxideApplied Physics Letters, 2006
- Electrical and optical properties of In2O3–ZnO thin films prepared by sol–gel methodThin Solid Films, 2005
- Depletion-mode ZnO nanowire field-effect transistorApplied Physics Letters, 2004
- Enhancement-mode thin-film field-effect transistor using phosphorus-doped (Zn,Mg)O channelApplied Physics Letters, 2004
- Amorphous ZnO–In2O3 transparent conductive films by simultaneous sputtering method of ZnO and In2O3 targetsVacuum, 2002
- Charge transport, optical transparency, microstructure, and processing relationships in transparent conductive indium–zinc oxide films grown by low-pressure metal-organic chemical vapor depositionApplied Physics Letters, 1998