• 제목/요약/키워드: Particle beam

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Electron Temperature, Plasma Density and Luminous Efficiency in accordance with Discharge Time in coplanar AC PDPs

  • Jeong, S.H.;Moon, M.W.;Oh, P.Y.;Jeong, J.M.;Ko, B.D.;Park, W.B.;Lee, J.H.;Lim, J.E.;Lee, H.J.;Han, Y.G.;Son, C.G.;Lee, S.B.;Yoo, N.L.;Choi, E.H.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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    • pp.1203-1206
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    • 2005

  • Electron temperature and plasma density in coplanar alternating-current plasma display panels (AC-PDP's) have been experimentally investigated in accordance with discharge time by a micro-probe in this experiment. The resolution of a step mortor to move in micro-Langmuir probe is 10um.[1-3] The used gas in this experiment is He-Ne-Xe (4%) mixure gas. And sustain voltage is 320V which is above of firing voltage for degradation. The electron temperature and plasma density can be obtained from current-voltage (I-V) characteristics of micro Langmuir probe, in which negative to positive bias voltage was applied to the probe. And Efficiency is calculated by formula related discharge power and light emission. Those experiments operated as various discharge time ($0{\sim}72$ Hours). As a result of this experiment, Electron Temperature was increased from 2eV to 5eV after discharge running time of 20 hours and saturates beyond 20 hours. The plasma density is inversely proportional to the square root of electron temperature. So the plasma density was decreased from $1.8{\times}10^{12}cm^{-3}$ to $8{\times}10^{11}cm^{-3}$ at above discharge running time. And the Efficiency was reduced to 70% at 60hours of discharge running time.

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Measurement of ion induced secondary electron emission $coefficient({\gamma})$ and work function of vacuum annealed MgO protective layer in AC PDP

  • Lim, J.Y.;Jeong, H.S.;Park, W.B.;Oh, J.S.;Jeong, J.M.;Choi, E.H.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2003년도 International Meeting on Information Display
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    • pp.799-801
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    • 2003

  • The secondary electron emission $coefficient({\bullet})$ of vacuum annealed MgO films has been investigated by ${\bullet}$ -focused ion beam(${\bullet}$ -FIB) system. The vacuum annealed MgO films have been found to have higher ${\bullet}$ values than those for as-deposited MgO films for Ne+ ion. Also it is found that the ${\bullet}$ for air-hold of vacuum annealed MgO layers for 24-hours is similar to that for vacuum annealed MgO films without any air-hold.

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Spatiotemporal behavior of excited Xe atoms density in Counter discharged type AC-PDP

  • Hong, Young-June;Oh, Phil-Yong;Jeong, Se-Hoon;Hong, Jong-Hwa;Kim, Jung-Hyun;Gyu, Yong;Cho, Seok-Ho;Hong, Sung-Hee;Hong, Byoung-Hee;Choi, Eun-Ha
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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    • pp.574-577
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    • 2007

  • We have measured the excited Xe atoms density in the $1s_5$ metastable states by laser absorption spectroscopy in counter discharged type AC-PDP. This experiment has shown the characteristic of the excited Xe atoms density which is relation to the visible light efficiency of PDP. The density of counter discharged AC-PDP have measured to be $9.47\;{\times}\;10^{13}\;cm{-3}$. The result has been shown to higher value than $1.45\;{\times}\;10^{13}\;cm^{-3}$ of conventional AC-PDP.

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Measurement of secondary electron emission coefficient(${\gamma}$) with oblique low energy ion and work function ${\phi}_{\omega}$ of theMgO thin film in AC-PDPs

  • Park, W.B.;Lim, J.Y.;Oh, J.S.;Jeong, H.S.;Jung, K.B.;Jeon, W.;Cho, G.S.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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    • pp.507-510
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    • 2004

  • Oblique ion-induced secondary electron emission coefficient(${\gamma}$) with low energy ..and work function ${\phi}_{\omega}$(${\theta}$ = 0 and ${\theta}$ = 20) of the MgO thin film in AC-PDPs has been measured by ${\gamma}$-FIB system. The MgO thin film has been deposited from sintered material under electron beam evaporation method. The energy of $He^+$ ions used has been ranged from 50eV to 150eV. Oblique ion beam has been chosen to be 10 degree, 20 degree and 30 degree. It is found that the higher secondary electron emission coefficient(${\gamma}$) has been achieved by the higher oblique ion beam up to inclination angle of 30 degree than the perpendicular incident ion beam.

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MgO Sputtering in the AC-PDPs with Monte Carlo Methods

  • Gill, Doh-Hyun;Kim, Hyun-Sook;Joh, Dae-Guen;Kim, Young-Guon;Choi, Eun-Ha;Cho, Guang-Sup
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2000년도 제1회 학술대회 논문집
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    • pp.109-110
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    • 2000

  • Sputtering yield of MgO film in the AC-PDPs has been calculated by Monte Carlo simulation of ion scattering. In the ion energy range less than 50 eV, the sputtering yield is 4 ${\times}$ $10^{-4}$ for Xe ions and it is between 0.1 and 0.01 for He, Ne, and Ar ions. The erosion rate is estimated about $25{\AA}$ per hour for Xe ions in an actual PDP plasma for sustain and full white mode.

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