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Volume 41, Issue 4
Displaying 1-8 of 8 articles from this issue
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Shigehiko YAMAMOTO1998 Volume 41 Issue 4 Pages 421-423
Published: April 20, 1998
Released on J-STAGE: October 20, 2009
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Masato SAITO, Hiroyuki TERAMOTO, Takuya OHIRA1998 Volume 41 Issue 4 Pages 424-427
Published: April 20, 1998
Released on J-STAGE: October 20, 2009
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Kuniyoshi YOKOO, Junji IKEDA, Kaoru TAHARA, Yoshiaki ABE, Hidenori MIM ...1998 Volume 41 Issue 4 Pages 428-433
Published: April 20, 1998
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSA metal-oxide-semiconductor (MOS) electron tunneling cathode using n-and heavily doped p-type Si substrates were fabricated and their characteristics were measured. Two energy peaks in the energy distributions of emitted electrons from the n-type and the p-type cathodes were observed. The paper discuses the experimental results to clear an emission mechanism from a semiconductor cathode and shows that a part of electrons are emitted into vacuum from the valence band of Si substrate by tunneling through the oxide barrier. In addition, the paper discusses a functional cathode with high emission efficiency and low energy dispersion based on a concept of energy band engineering of semiconductor.View full abstractDownload PDF (754K) -
Seigo KANEMARU, Junji ITOH1998 Volume 41 Issue 4 Pages 434-439
Published: April 20, 1998
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSWe have fabricated three types of silicon (Si) field emitters that consist of a Si conical tip and niobium gate electrodes, as follows. (1) An np-type emitter, in which an np junction is built by using ion implantation, exhibits photosensitive field emission. (2) A MOSFET-structured field emitter consists of an emitter tip and a built-in MOSFET. This device exhibits remarkable stability and controllability of emission current. (3) A double-gated field emitter has a vertical triode structure consisting of a conical Si tip and two gates surrounding the tip. The upper gate operates as a focusing lens to generate focused electron beams.View full abstractDownload PDF (1046K) -
For Graphite, Iron Oxide and Water Glass Mixed MaterialMasao HASHIBA, Yuko HIROHATA, Tomoaki HINO, Hiroshi SINBORI, Sadao DEY ...1998 Volume 41 Issue 4 Pages 440-447
Published: April 20, 1998
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSThe gas desorption properties of coating materials on the inner wall of a cathode ray tube, mixture materials from graphite, iron oxide and water glass, were examined by using a technique of thermal desorption spectroscopy (TDS). The major outgassing species during the heating up to 500°C were CO2 and H2O. TDS spectra of water and carbon dioxide desorption showed sharp peakes at temperatures around 100-200°C. The desorbed gas amount was very small for the mixture samples of Fe2O3 powder and water glass, and large for the mixture samples of graphite powder. In order to reduce the occuluded gas amount in samples as low as possible, it is essential to elevate at least the temperature of heat treatment for samples up to 400-500°C.
For samples after degassing in TDS experiments, readsorption test were made and TDS spectra were taken again. The adsorption amount of H2O or CO2 increased as the composition ratio of graphite powder. In particular, the adsorption capacity of gas largely increased by the addition of Fe2O3 powder. The enhancement of adsorption capacity is due to that the surface structure became porous and also the effective surface area large by the addition of small content of Fe2O3 powder.View full abstractDownload PDF (1452K) -
Masao MISONOU1998 Volume 41 Issue 4 Pages 448-451
Published: April 20, 1998
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSEvacuated Glazing named SPACIA has been successfully developed. Its structure, which was originally designed by Collins et. al at the University of Sydney, has been modified from the viewpoint of the mass production and the requirement of the Japanese market. In this report, mechanism of thermal insulation in the evacuated glazing is discussed based on the structure, and the performance as a practical window is described.View full abstractDownload PDF (541K) -
Yukiko ABE, Sin-ichi IGARASHI, Yasuo IRIE, Takato HIRAYAMA, Ichiro ARA ...1998 Volume 41 Issue 4 Pages 452-457
Published: April 20, 1998
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSWe have developed an eXtremely-low-current Low Energy Electron Diffraction (XLEED) apparatus equipped with a micro-channel plate and a position-sensitive detector which reduces electron beam damage and charge-up effects and makes it possible to study the structure of physisorbed films. This XLEED system is combined with the ellipsometer system which monitors the thickness of a physisorbed film. We observed Xe overlayer on Ag (111) and grahpite (0001) surfaces. We found that a thick Xe films on Ag (111) showed a single crystal structure which keeps relative orientation to the substrate.View full abstractDownload PDF (1130K) -
Yoshiyasu BABA, Kenji SATO, Shinichi AZUMA1998 Volume 41 Issue 4 Pages 458-466
Published: April 20, 1998
Released on J-STAGE: October 20, 2009
JOURNAL FREE ACCESSDownload PDF (2871K)
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