Monday February 27th 4:00 - 4:50pm KEC 1001
Rick Presley M.S. Candidate Oregon State University Transparent Electronics: Thin-Film Transistors and Integrated Circuits Abstract This talk focuses on two aspects of transparent electronics, SnO2 transparent thin-film transistors (TTFTs) and transparent circuits. Both depletion- and enhancement-mode SnO 2 TTFTs are realized. The maximum effective mobility for the depletion- and enhancement-mode devices are 2 cm^2V^-1 s^-1 and 0.8 cm^2V^-1s^-1, respectively. The second part of this talk focuses on the fabrication procedure and the electrical characteristics of transparent circuits, which include inverters and ring oscillators. These circuits are highly transparent, exhibiting 75% optical transmittance in the visible portion of the electromagnetic spectrum, and are fabricated using indium gallium oxide as the active channel material and standard photolithography techniques. The n-channel indium gallium oxide thin- film transistors exhibit a peak incremental mobility of 7 cm^2V^-1s^-1, and a turn-on voltage of 2 V. A five-stage ring oscillator circuit (which does not employ level-shifting) is fabricated, and exhibits an oscillation frequency of 2.2 kHz with the gate and drain of the load transistor biased at 30 V. The maximum oscillation frequency observed is 9.5 kHz, with the gate and drain of the load transistor biased at 80 V. Biography Rick E. Presley grew up in Lebanon, OR, and received the B.S. degree in computer engineering from Oregon State University in 2001. He has been a graduate research assistant under Doctor John F. Wager at Oregon State University working on transparent electronics since 2003. _______________________________________________ Colloquium mailing list [email protected] https://secure.engr.oregonstate.edu/mailman/listinfo/colloquium
