Fabrication and Characterization of Active and Sequential Circuits Utilizing Schottky-Wrap-Gate-Controlled GaAs Hexagonal Nanowire Network Structures

Hong-Quan ZHAO  Seiya KASAI  Tamotsu HASHIZUME  Nan-Jian WU  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E91-C   No.7   pp.1063-1069
Publication Date: 2008/07/01
Online ISSN: 1745-1353
DOI: 10.1093/ietele/e91-c.7.1063
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Heterostructure Microelectronics with TWHM 2007)
Category: Emerging Devices
Keyword: 
Schottky wrap gate (WPG),  GaAs hexagonal nanowire network,  flip flop (FF),  ring oscillator,  

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Summary: 
For realization of hexagonal BDD-based digital systems, active and sequential circuits including inverters, flip flops and ring oscillators are designed and fabricated on GaAs-based hexagonal nanowire networks controlled by Schottky wrap gates (WPGs), and their operations are characterized. Fabricated inverters show comparatively high transfer gain of more than 10. Clear and correct operation of hexagonal set-reset flip flops (SR-FFs) is obtained at room temperature. Fabricated hexagonal D-type flip flop (D-FF) circuits integrating twelve WPG field effect transistors (FETs) show capturing input signal by triggering although the output swing is small. Oscillatory output is successfully obtained in a fabricated 7-stage hexagonal ring oscillator. Obtained results confirm that a good possibility to realize practical digital systems can be implemented by the present circuit approach.