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Your search keyword '"Jung Su Kang"' showing total 4 results
Start Over Author "Jung Su Kang" Journal 2018 31st international vacuum nanoelectronics conference (ivnc)
4 results on '"Jung Su Kang"'

1. High performance carbon nanotube cold cathode for x-ray and UV devices

Author

Kyu Chang Park, Jung Su Kang, and Sung Tae Yoo

Subjects
010302 applied physics, Materials science, Fabrication, Physics::Instrumentation and Detectors, business.industry, X-ray, 02 engineering and technology, Electron, Carbon nanotube, 021001 nanoscience & nanotechnology, medicine.disease_cause, 01 natural sciences, Cathode, law.invention, Condensed Matter::Materials Science, law, 0103 physical sciences, Cathode ray, medicine, Physics::Accelerator Physics, Cold cathode, Optoelectronics, 0210 nano-technology, business, Ultraviolet
Abstract

We developed high performance cold cathode electron beam fabrication technique with carbon nanotube(CNT) emitters. Properties of CNT emitters and its electron emission characteristics should be compatible with application devices. Xray tubes require very high current with small cathode area and ultraviolet lamps require uniform electron emission on large area. So, we developed novel CNT electron beam with buffer and metal layer for sacrificing for structural rigidity and enhanced conductivity. We applied the novel CNT cold cathode electron beam for UV lamps and x-ray tubes for high performance UV light and x-ray image.

Published
2018

2. Fabrication of stable carbon nanotube cold cathode electron emitters with electrical aging

Author

Jung Hyun Kim, Jung Su Kang, and Kyu Chang Park

Subjects
010302 applied physics, Materials science, Fabrication, Annealing (metallurgy), business.industry, Astrophysics::High Energy Astrophysical Phenomena, Biasing, 02 engineering and technology, Carbon nanotube, 021001 nanoscience & nanotechnology, 01 natural sciences, Cathode, law.invention, Condensed Matter::Materials Science, Field electron emission, law, 0103 physical sciences, Physics::Accelerator Physics, Cold cathode, Optoelectronics, 0210 nano-technology, Joule heating, business
Abstract

We studied on the fabrication and improved field emission properties of carbon nanotube (CNT) cold cathode electron emitters with electrical aging. Our CNT field emitters have improved electron emission properties with thermal and electrical aging. For the set-up of electrical aging, we used bias voltage at Joule heating appeared. Our CNT emitters show increases of electron emission at initial stage of aging and then saturation of emission current. With the electrical aging, we obtained enhanced electron emission from 3 mA to 5.5 mA and long-time stable operation.

Published
2018

3. Fabrication of high current carbon nanotube emitters for gyrotron devices

Author

Jung Su Kang, Hye In Lee, and Kyu Chang Park

Subjects
010302 applied physics, Fabrication, Materials science, Physics::Instrumentation and Detectors, business.industry, 02 engineering and technology, Electron, Carbon nanotube, 021001 nanoscience & nanotechnology, 01 natural sciences, Cathode, law.invention, Condensed Matter::Materials Science, law, Gyrotron, 0103 physical sciences, Cathode ray, Physics::Accelerator Physics, Cold cathode, Optoelectronics, 0210 nano-technology, business, Beam (structure)
Abstract

The ring shaped high current carbon nanotube (CNT) cold cathode electron beam was developed for gyrotron application. The various circular ring shaped electron beam designed with CNT emitters for gyrotron was investigated. The circular beam design designed to have CNTs area such as, 0.2 cm2,0.3 cm2, 0.5 cm2 and 0.8 cm2. The electron emission current strongly related on the density of CNT emitters and design parameters. The field emission current depend on the ring width and could achieve electron emission current up to 160 mA.

Published
2018

4. Fabrication of highly conductive carbon nanotube emitters for long-life cold cathode electron beam

Author

Kyu Chang Park, Hye In Lee, and Jung Su Kang

Subjects
010302 applied physics, Materials science, Fabrication, business.industry, chemistry.chemical_element, 02 engineering and technology, Carbon nanotube, 021001 nanoscience & nanotechnology, 01 natural sciences, Cathode, law.invention, Condensed Matter::Materials Science, chemistry, law, Molybdenum, 0103 physical sciences, Physics::Atomic and Molecular Clusters, Cathode ray, Physics::Accelerator Physics, Cold cathode, Optoelectronics, 0210 nano-technology, business, Layer (electronics), Common emitter
Abstract

We developed high performance carbon nanotube cold cathode electron source with molybdenum layer for vacuum nanoelectronic devices. With DC-PECVD system for the CNT growth, the high-energy ion radicals in the plasma could etch the Mo layer, and then the etched vapors coated on the CNT emitter. With the patterned Mo layer, a property of CNT emitter were improved as the emission current and the conductivity of emitters

Published
2018

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