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2 个结果
  • 简介:TheMOCVDgrowthofmodifiedAlAs/GaAsdoublebarrierresonanttunnelingdiodes(DBRTD)withanA1GaAschairwasreported.Theresonancestothefirstexcitedstateswereobtained.Thepeak-to-valleycur-rentratio(PVCR)is1.3at77K,roomtemperaturepeakcurrentdensityis8kA/cm~2.Theresonancevoltagesareinagreementwiththetheoreticalapproachbytransfer-matrixmethod.Influenceofinterruptedgrowthtimeatthehetero-interfaceandincorporationoftheAlGaAschairtothedeviceperformanceswerestudiedandthemechanismwasdiscussed.TheattempttoaddanAlGaAschairtotheDBRTDbyMOCVDresultedinimprovementinthePVCRandpeakcurrentdensity.

  • 标签: MOCVD AlAs/GaAs CRYSTAL GROWTH DBRTD
  • 简介:近日从中国船舶工业经济研究中心获悉,预计2005年中国造船产量将超过1000万载重吨,在国际市场上的份额将提高到17%左右。

  • 标签: 2005年 中国 船舶工业 造船产量