Control of Current Saturation and Threshold Voltage Shift in Indium Oxide Nanowire Transistors with Femtosecond Laser Annealing
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- 作者：Chunghun Lee ; Pornsak Srisungsitthisunti ; Sangphill Park ; Seongmin Kim ; Xianfan Xu ; Kaushik Roy ; David B. Janes ; Chongwu Zhou ; Sanghyun Ju ; Minghao Qi
- 刊名：ACS Nano
- 出版年：2011
- 出版时间：February 22, 2011
- 年：2011
- 卷：5
- 期：2
- 页码：1095-1101
- 全文大小：926K
- 年卷期：0
- ISSN：1936-086X
文摘
Transistors based on various types of nonsilicon nanowires have shown great potential for a variety of applications, especially for those that require transparency and low-temperature substrates. However, critical requirements for circuit functionality, such as saturated source-drain current and matched threshold voltages of individual nanowire transistors in a way that is compatible with low temperature substrates, have not been achieved. Here we show that femtosecond laser pulses can anneal individual transistors based on In2O3 nanowires, improve the saturation of the source-drain current, and permanently shift the threshold voltage to the positive direction. We applied this technique and successfully shifted the switching threshold voltages of NMOS-based inverters and improved their noise margin, in both depletion and enhancement modes. Our demonstration provides a method to trim the parameters of individual nanowire transistors, and suggests potential for large-scale integration of nanowire-based circuit blocks and systems.