Browsing by Author "Liu, Mai"

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Growth of carbon nanotube field emitters in the triode structure using anodic aluminum oxide as the template
(2007-04-01)
Lin, Chen-Chun
;
Chang, Kai-Chun
;
Pan, Fu-Ming
;
Kuo, Cheng-Tzu
;
Liu, Mai
Carbon nanotubes (CNT) were grown in anodic aluminum oxide (AAO) and used as field emitters in a triode structure. To fabricate the field-emission triode structure, nanoporous anodic aluminum oxide (AAO) thin layer was first prepared on the Si(100) substrate, followed by the growth of vertically aligned carbon nanotubes in AAO pore channels by electron cyclotron resonance chemical vapor deposition (ECR-CVD). The SiO2 dielectric and Al gate electrode layers required for the triode structure were directly deposited on the CNTs. Reactive ion and wet etches were then used to open the field-emission area in the triode. Scanning electron microscopy and Raman spectroscopy studies revealed that damage to CNT emitters in the etched area was trivial. Field-emission characteristics of the CNT emitters have been studied and an anode turn-on electric field of similar to 8.05 V/mu m was measured. (C) 2007 Elsevier B.V. All rights reserved.
Three-dimensional simulation of novel surface conduction electron-emitters
(2007)
Lo, Hsiang-Yu
;
Li, Yiming
;
Chao, Hsueh-Yung
;
Tsai, Chih-Hao
;
Pan, Fu-Ming
We for the first time explore a novel structure of Pd thin-film emitter fabricated on the substrate with various gaps ranging from mn to 90 nm. With the 3D electromagnetic particle-in-cell (PIC) simulation, we study the conducting mechanism and driving current for the new device with one palladium field emission emitter. Compared with the experimental data, our calibrated simulation predicts a high emission efficiency of the investigated device structure. It is found that the turn-on voltage is about 50V and a very high electron emission current of 0.1 mA is estimated at the anode voltage of 80 V for one emitter. The novel structure Of surface conduction electron-emitter (SCE) has the advantages of the simple fabrication and the high emission efficiency. Based upon the numerical procedure, we are currently investigating the emission efficiency for more advanced structures of SCE.