Carbon nanotube field emitter arrays having an electron beam focusing structure

Jun Hee Choi, F.; Zoulkarneev, Andrei R.; Yong Wan Jin, Andrei R.; Young Jun Park, Andrei R.; Deuk Seok Chung, Andrei R.; Byung Kwon Song, Andrei R.; In Taek Han, Andrei R.; Hang Woo Lee, Andrei R.; Sang Hyun Park; Ho Suk Kang, Andrei R.; Ha Jong Kim, Andrei R.; Jung Woo Kim, Andrei R.; Jae Eun Jung, Andrei R.; Jong Min Kim; Hong Gu Baek, Andrei R.; Se Gi Yu, Andrei R.
February 2004
Applied Physics Letters;2/9/2004, Vol. 84 Issue 6, p1022
Academic Journal
An electron beam focusing structure was incorporated into the gated field emitter arrays where the emitters were screen-printed carbon nanotubes. The focusing structure was comprised of 8-μm-thick bulky SiO[sub x] focus gate insulator and Cr focus gate, and exhibited negligible leakage between the gate and the focus gate. In current–voltage measurements, it is found that the anode current strongly depends on both the focus gate and the anode bias voltages. Electron beams were focused well at the anode with a slight overfocusing effect, which is due to the wide electron beam divergence from carbon nanotubes. A new focusing structure based on the simulation is proposed to overcome the overfocusing. © 2004 American Institute of Physics.


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