Journal
THIN FILM TRANSISTOR TECHNOLOGIES 14 (TFTT 14)
Volume 86, Issue 11, Pages 111-114Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/08611.0111ecst
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The thin-film transistors (TFTs) with back-channel etched (BCE) type enable channel length to be narrow and reduce parasitic capacitances owing to its shorter overlaps between the gate and source/drain (S/D) electrodes. In this study, a high-performance BCE-type oxide thin-film transistor was proposed for investigation. A novel stacked double layer In-W-O (IWO) / In-W-Zn-O (IWZO) channel structure was fabricated and developed. Respectively, IWZO exhibits a high resistance to back-channel etching damage and IWO channel achieve a high mobility. The double layer IWO/IWZO TFTs are promising candidates for driving active matrix organic light-emitting diode (AMOLED) and high resolution display applications in the future. The double layer IWO/IWZO TFTs with S/D pattern by H2O2 + KOH can exhibit the high-performance electrical characteristic. The field-effect mobility (mu FE) similar to 21.1cm(2)/V-s, subthreshold swing (S.S.) similar to 0.15 V/dec., threshold voltage (V-TH) similar to -0.092 V, and on/off ratio similar to 4.88x10(8) can be achieved.
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