Yoon-Ho Song - Academia.edu (original) (raw)

Papers by Yoon-Ho Song

Research paper thumbnail of Analysis of electron emission degradation in silicon field emitter arrays

Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 1998

Research paper thumbnail of Degradation Mechanism Of Electron Emission Characteristics In Silicon Field Emitters

Proceedings of the Fourth Asian Symposium on Information Display, 1997

ABSTRACT

Research paper thumbnail of Persistent photoconductivity in compensated amorphous silicon

Physical Review B, 1990

Persistent photoconductivity (PPC) in compensated amorphous silicon (a-Si:H) has been investigate... more Persistent photoconductivity (PPC) in compensated amorphous silicon (a-Si:H) has been investigated. Single-carrier injection was performed with use of Schottky-barrier structures. Only hole injection can give rise to the PPC in compensated a-Si:H, with the result that the PPC ...

Research paper thumbnail of Integration and characterization of amorphous silicon thin-film transistor and Mo-tips for active-matrix cathodes

IEEE Transactions on Electron Devices, 2002

We have designed and monolithically integrated amorphous silicon thin-film transistor (a-Si TFT) ... more We have designed and monolithically integrated amorphous silicon thin-film transistor (a-Si TFT) with Mo-tip field emitter arrays (FEAs) on glass substrate for active-matrix cathodes (AMCs) in field-emission display (FED) application. In our AMCs, a light shield layer of metal was introduced to reduce the photo leakage and back channel currents of a-Si TFT. The light shield was designed to have the role of focusing grid to focus emitted electron beams from the AMC on the corresponding anode pixel by forming it around the Mo-tip FEAs as well as above the a-Si TFT. The thin film depositions in a-Si TFTs were performed at a high temperature of above 360 C to guarantee the postvacuum packaging process of cathode and anode plates in FED. Also, a novel wet etching process was developed for n +-doped-a-Si etching with high etch selectivity to intrinsic a-Si and good etch controllability and was used in the fabrication of inverted stagger TFT with a very thin active layer. The developed a-Si TFTs had good enough performance to be used as control devices for AMCs with Mo-tip emitters. The fabricated AMCs exhibited very effective aging process for field emitters with the limitation of emission currents by the a-Si TFT and thus, we could successfully activate Mo-tips to emit electrons without any tip-failure. The field-emission currents of the fabricated AMCs were well controlled by the gate bias of a-Si TFTs, showing the possibility of low-voltage matrix addressing and good stability and reliability of field emission.

Research paper thumbnail of Patterned selective growth of carbon nanotubes and large field emission from vertically well-aligned carbon nanotube field emitter arrays

Applied Physics Letters, 2001

Research paper thumbnail of Method of manufacturing a fine-patternable, carbon nano-tube emitter with high reliabilty

Research paper thumbnail of Field emission device with fine local dimming

Research paper thumbnail of Method of Fabricating Thin Film Transistor Having Multilayer Structure and Active Matrix Display Device Including the Thin Film Transistor

Research paper thumbnail of Microminiature X-ray tube with triode structure using a nano emitter

Research paper thumbnail of Color Variable Field Emission Device

Research paper thumbnail of Discretely addressable large-area X-ray system

Research paper thumbnail of Detector and Method of Fabricating the Same

Research paper thumbnail of Effects of organic binders on field emission properties in patterned carbon nanotube pixels

IVMC 2001. Proceedings of the 14th International Vacuum Microelectronics Conference (Cat. No.01TH8586), 2001

... Young-Rae Cho, Jin Ho Lee, Seong-Deok Ahn, Bong-Chul Kim, Yoon-Ho Song, Chi-Sun Hwang, Choong... more ... Young-Rae Cho, Jin Ho Lee, Seong-Deok Ahn, Bong-Chul Kim, Yoon-Ho Song, Chi-Sun Hwang, Choong Heui Chung and Kyoung Ik Cho Micro-Electronics Tech. ... REFERENCES [l] S. Uemura et al., SID 1998 Digest, 1052 (1998). [2] WB Choi et al., Appl. Phys. Lett. ...

Research paper thumbnail of Effect of Photosensitive Carbon Nanotube Paste on Field Emission Properties

Korean Journal of Materials Research

Research paper thumbnail of Fast and Stable Operation of Carbon Nanotube Field-Emission X-ray Tubes Achieved Using an Advanced Active-Current Control

IEEE Electron Device Letters, 2015

Research paper thumbnail of High-transmission triode CNT emitter on metal tip for superminiature X-ray tube

The CNT emitter on metal tip (CNT-on-Tip) cathode can provide high-brightness electron beams due ... more The CNT emitter on metal tip (CNT-on-Tip) cathode can provide high-brightness electron beams due to its point-like electron emission sites. The triode type emitter with a gate electrode is prerequisite to an intensity-controllable X-ray. We simulated the trajectory of the emitted electron beams in the triode CNT-on-Tip and optimized the configuration to obtain ideal triode properties. Consequently, the anode current-gate voltage characteristics were recorded with high transmission without any gate leakage current.

Research paper thumbnail of High-transmission triode CNT emitter on metal tip for superminiature X-ray tube

The CNT emitter on metal tip (CNT-on-Tip) cathode can provide high-brightness electron beams due ... more The CNT emitter on metal tip (CNT-on-Tip) cathode can provide high-brightness electron beams due to its point-like electron emission sites. The triode type emitter with a gate electrode is prerequisite to an intensity-controllable X-ray. We simulated the trajectory of the emitted electron beams in the triode CNT-on-Tip and optimized the configuration to obtain ideal triode properties. Consequently, the anode current-gate voltage characteristics were recorded with high transmission without any gate leakage current.

Research paper thumbnail of Smart X-ray tube based on CNT emitters for stationary tomosynthesis examination system

We have fabricated a smart triode X-ray tube based on carbon nanotube (CNT) emitters with a high ... more We have fabricated a smart triode X-ray tube based on carbon nanotube (CNT) emitters with a high tube current for the stationary breast tomosynthesis examination system. The X-ray tube was designed to have a focal spot of around 0.3 mm. The active-current driving method was applied to our X-ray device to enhance stability and uniformity of the CNT emitters. We have obtained successful X-ray images through the triode X-ray tube evacuated by a pumping system.

Research paper thumbnail of Smart X-ray tube based on CNT emitters for stationary tomosynthesis examination system

We have fabricated a smart triode X-ray tube based on carbon nanotube (CNT) emitters with a high ... more We have fabricated a smart triode X-ray tube based on carbon nanotube (CNT) emitters with a high tube current for the stationary breast tomosynthesis examination system. The X-ray tube was designed to have a focal spot of around 0.3 mm. The active-current driving method was applied to our X-ray device to enhance stability and uniformity of the CNT emitters. We have obtained successful X-ray images through the triode X-ray tube evacuated by a pumping system.

Research paper thumbnail of Patterning technology of carbon nanotubes for field emission displays

Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 2001

... Young-Rae Cho, Jin Ho Lee, Yoon-Ho Song, Seung-Youl Kang, Moon-Youn Jung, Chi-Sun Hwang, Kyou... more ... Young-Rae Cho, Jin Ho Lee, Yoon-Ho Song, Seung-Youl Kang, Moon-Youn Jung, Chi-Sun Hwang, Kyoung Ik Cho. ... JO Choi, JW Huh, YH Choi, MJ Kim, YR Cho, and HS Jeong, “Field emission properties of diamondlike carbon films made by a novel laser evaporation technique ...

Research paper thumbnail of Analysis of electron emission degradation in silicon field emitter arrays

Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 1998

Research paper thumbnail of Degradation Mechanism Of Electron Emission Characteristics In Silicon Field Emitters

Proceedings of the Fourth Asian Symposium on Information Display, 1997

ABSTRACT

Research paper thumbnail of Persistent photoconductivity in compensated amorphous silicon

Physical Review B, 1990

Persistent photoconductivity (PPC) in compensated amorphous silicon (a-Si:H) has been investigate... more Persistent photoconductivity (PPC) in compensated amorphous silicon (a-Si:H) has been investigated. Single-carrier injection was performed with use of Schottky-barrier structures. Only hole injection can give rise to the PPC in compensated a-Si:H, with the result that the PPC ...

Research paper thumbnail of Integration and characterization of amorphous silicon thin-film transistor and Mo-tips for active-matrix cathodes

IEEE Transactions on Electron Devices, 2002

We have designed and monolithically integrated amorphous silicon thin-film transistor (a-Si TFT) ... more We have designed and monolithically integrated amorphous silicon thin-film transistor (a-Si TFT) with Mo-tip field emitter arrays (FEAs) on glass substrate for active-matrix cathodes (AMCs) in field-emission display (FED) application. In our AMCs, a light shield layer of metal was introduced to reduce the photo leakage and back channel currents of a-Si TFT. The light shield was designed to have the role of focusing grid to focus emitted electron beams from the AMC on the corresponding anode pixel by forming it around the Mo-tip FEAs as well as above the a-Si TFT. The thin film depositions in a-Si TFTs were performed at a high temperature of above 360 C to guarantee the postvacuum packaging process of cathode and anode plates in FED. Also, a novel wet etching process was developed for n +-doped-a-Si etching with high etch selectivity to intrinsic a-Si and good etch controllability and was used in the fabrication of inverted stagger TFT with a very thin active layer. The developed a-Si TFTs had good enough performance to be used as control devices for AMCs with Mo-tip emitters. The fabricated AMCs exhibited very effective aging process for field emitters with the limitation of emission currents by the a-Si TFT and thus, we could successfully activate Mo-tips to emit electrons without any tip-failure. The field-emission currents of the fabricated AMCs were well controlled by the gate bias of a-Si TFTs, showing the possibility of low-voltage matrix addressing and good stability and reliability of field emission.

Research paper thumbnail of Patterned selective growth of carbon nanotubes and large field emission from vertically well-aligned carbon nanotube field emitter arrays

Applied Physics Letters, 2001

Research paper thumbnail of Method of manufacturing a fine-patternable, carbon nano-tube emitter with high reliabilty

Research paper thumbnail of Field emission device with fine local dimming

Research paper thumbnail of Method of Fabricating Thin Film Transistor Having Multilayer Structure and Active Matrix Display Device Including the Thin Film Transistor

Research paper thumbnail of Microminiature X-ray tube with triode structure using a nano emitter

Research paper thumbnail of Color Variable Field Emission Device

Research paper thumbnail of Discretely addressable large-area X-ray system

Research paper thumbnail of Detector and Method of Fabricating the Same

Research paper thumbnail of Effects of organic binders on field emission properties in patterned carbon nanotube pixels

IVMC 2001. Proceedings of the 14th International Vacuum Microelectronics Conference (Cat. No.01TH8586), 2001

... Young-Rae Cho, Jin Ho Lee, Seong-Deok Ahn, Bong-Chul Kim, Yoon-Ho Song, Chi-Sun Hwang, Choong... more ... Young-Rae Cho, Jin Ho Lee, Seong-Deok Ahn, Bong-Chul Kim, Yoon-Ho Song, Chi-Sun Hwang, Choong Heui Chung and Kyoung Ik Cho Micro-Electronics Tech. ... REFERENCES [l] S. Uemura et al., SID 1998 Digest, 1052 (1998). [2] WB Choi et al., Appl. Phys. Lett. ...

Research paper thumbnail of Effect of Photosensitive Carbon Nanotube Paste on Field Emission Properties

Korean Journal of Materials Research

Research paper thumbnail of Fast and Stable Operation of Carbon Nanotube Field-Emission X-ray Tubes Achieved Using an Advanced Active-Current Control

IEEE Electron Device Letters, 2015

Research paper thumbnail of High-transmission triode CNT emitter on metal tip for superminiature X-ray tube

The CNT emitter on metal tip (CNT-on-Tip) cathode can provide high-brightness electron beams due ... more The CNT emitter on metal tip (CNT-on-Tip) cathode can provide high-brightness electron beams due to its point-like electron emission sites. The triode type emitter with a gate electrode is prerequisite to an intensity-controllable X-ray. We simulated the trajectory of the emitted electron beams in the triode CNT-on-Tip and optimized the configuration to obtain ideal triode properties. Consequently, the anode current-gate voltage characteristics were recorded with high transmission without any gate leakage current.

Research paper thumbnail of High-transmission triode CNT emitter on metal tip for superminiature X-ray tube

The CNT emitter on metal tip (CNT-on-Tip) cathode can provide high-brightness electron beams due ... more The CNT emitter on metal tip (CNT-on-Tip) cathode can provide high-brightness electron beams due to its point-like electron emission sites. The triode type emitter with a gate electrode is prerequisite to an intensity-controllable X-ray. We simulated the trajectory of the emitted electron beams in the triode CNT-on-Tip and optimized the configuration to obtain ideal triode properties. Consequently, the anode current-gate voltage characteristics were recorded with high transmission without any gate leakage current.

Research paper thumbnail of Smart X-ray tube based on CNT emitters for stationary tomosynthesis examination system

We have fabricated a smart triode X-ray tube based on carbon nanotube (CNT) emitters with a high ... more We have fabricated a smart triode X-ray tube based on carbon nanotube (CNT) emitters with a high tube current for the stationary breast tomosynthesis examination system. The X-ray tube was designed to have a focal spot of around 0.3 mm. The active-current driving method was applied to our X-ray device to enhance stability and uniformity of the CNT emitters. We have obtained successful X-ray images through the triode X-ray tube evacuated by a pumping system.

Research paper thumbnail of Smart X-ray tube based on CNT emitters for stationary tomosynthesis examination system

We have fabricated a smart triode X-ray tube based on carbon nanotube (CNT) emitters with a high ... more We have fabricated a smart triode X-ray tube based on carbon nanotube (CNT) emitters with a high tube current for the stationary breast tomosynthesis examination system. The X-ray tube was designed to have a focal spot of around 0.3 mm. The active-current driving method was applied to our X-ray device to enhance stability and uniformity of the CNT emitters. We have obtained successful X-ray images through the triode X-ray tube evacuated by a pumping system.

Research paper thumbnail of Patterning technology of carbon nanotubes for field emission displays

Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 2001

... Young-Rae Cho, Jin Ho Lee, Yoon-Ho Song, Seung-Youl Kang, Moon-Youn Jung, Chi-Sun Hwang, Kyou... more ... Young-Rae Cho, Jin Ho Lee, Yoon-Ho Song, Seung-Youl Kang, Moon-Youn Jung, Chi-Sun Hwang, Kyoung Ik Cho. ... JO Choi, JW Huh, YH Choi, MJ Kim, YR Cho, and HS Jeong, “Field emission properties of diamondlike carbon films made by a novel laser evaporation technique ...