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    • 83. 发明授权
    • Ferroelectric memory device
    • 铁电存储器件
    • US07215567B2
    • 2007-05-08
    • US11216078
    • 2005-09-01
    • Masami HashimotoTakeshi KijimaJunichi KarasawaMayumi Ueno
    • Masami HashimotoTakeshi KijimaJunichi KarasawaMayumi Ueno
    • G11C11/22
    • G11C11/22G11C11/223
    • To provide a nondestructive-read ferroelectric memory capable of realizing high speed, high integration, and long service life.The present invention is provided with an MFSFET 100 having a ferroelectric thin film at its gate portion, word line 104, bit line 105, and bit line 106 so as to apply voltage equal to or higher than the coercive electric field of the ferroelectric thin film between the bit line 105 and the word line 104 at first write timing and apply voltage equal to or higher than the coercive electric field between the bit line 106 and the word line 104 at second write timing, and applies voltage equal to or lower than the coercive electric field of the ferroelectric thin film between the bit line 105 and the word line 104 at first read timing to detect the current flowing between the both bit lines, and applies voltage equal to or lower than the coercive electric field between the bit line 106 and the word line 104 at second read timing to detect the current flowing between the both bit lines.
    • 提供能够实现高速,高集成度,长使用寿命的非破坏性读取型铁电存储器。 本发明具有在栅极部分具有铁电薄膜的MFSFET100,字线104,位线105和位线106,以施加等于或高于铁电薄膜的矫顽电场的电压 在第一写入定时在位线105和字线104之间施加等于或高于位线106和字线104之间的矫顽电场的电压,并施加等于或小于 在第一读取定时,在位线105和字线104之间的铁电薄膜的矫顽电场,以检测在两个位线之间流动的电流,并施加等于或低于位线106之间的矫顽电场的电压 和第二读取定时的字线104,以检测在两个位线之间流动的电流。
    • 84. 发明授权
    • Ferroelectric memory device, method of driving the same, and driver circuit
    • 铁电存储器件,其驱动方法和驱动电路
    • US07142445B2
    • 2006-11-28
    • US10932890
    • 2004-09-02
    • Yasuaki HamadaTakeshi KijimaEiji Natori
    • Yasuaki HamadaTakeshi KijimaEiji Natori
    • G11C11/22G11C5/06G11C5/14G11C7/00G11C8/00
    • G11C11/22
    • A ferroelectric memory device preventing an imprint and including a plurality of wordlines, a plurality of bitlines, a plurality of ferroelectric memory cells, a wordline driver which drives the wordlines, and a bitline driver which drives the bitlines. The wordline driver and the bitline driver switch an operation mode of the ferroelectric memory device to a first mode which is one of a data reading mode, a data rewriting mode and a data writing mode, by applying a voltage Vs having a first polarity to at least one ferroelectric memory cell selected from the ferroelectric memory cells. The wordline driver and the bitline driver switch the operation mode to a second mode in which the ferroelectric memory device prevents an imprint by applying a voltage (−Vs/3) having a second polarity which is the reverse of the first polarity to the selected ferroelectric memory cell, after the operation mode has been switched to the first mode at least once, the voltage of the second polarity causing no inversion of data stored in the ferroelectric memory cells.
    • 一种铁电存储器件,其防止压印并包括多个字线,多个位线,多个铁电存储器单元,驱动字线的字线驱动器和驱动位线的位线驱动器。 字线驱动器和位线驱动器通过将具有第一极性的电压Vs施加到第一模式,将铁电存储器件的操作模式切换到作为数据读取模式,数据重写模式和数据写入模式之一的第一模式 选自铁电存储单元的至少一个铁电存储单元。 字线驱动器和位线驱动器将操作模式切换到第二模式,其中铁电存储器件通过将与第一极性相反的具有第二极性的电压(-Vs / 3)施加到所选铁电体来防止压印 存储单元,在操作模式已经被切换到第一模式至少一次之后,第二极性的电压不会导致存储在铁电存储单元中的数据的反转。
    • 85. 发明授权
    • MOCVD apparatus and MOCVD method
    • MOCVD装置和MOCVD方法
    • US07077911B2
    • 2006-07-18
    • US10376276
    • 2003-03-03
    • Takeshi KijimaEiji NatoriMitsuhiro Suzuki
    • Takeshi KijimaEiji NatoriMitsuhiro Suzuki
    • H01L21/00C23C16/00
    • C23C16/45508C23C16/455
    • The invention provides an MOCVD apparatus and a MOCVD method which can deposit a thin film having satisfactory properties by reducing or preventing temperature decrease of a source gas. An MOCVD apparatus according to the present invention supplies a source gas, as a mixture of an MO source gas, with an oxidizing gas to a substrate to thereby form a film. The MOCVD apparatus includes a substrate holder to hold the substrate; a deposition chamber to house the substrate holder; a supply mechanism to supply the source gas to a surface of the substrate; and a heating device to heat the substrate held by the substrate holder. The deposition chamber includes a substrate housing unit to house the substrate holder holding the substrate, and a passage housing unit connected to the substrate housing unit and constituting a passage to supply the source gas to the substrate. The passage has a cross-sectional area that is smaller than the area of a deposition plane of the substrate when the passage housing unit is cut in parallel with the deposition plane of the substrate.
    • 本发明提供一种MOCVD装置和MOCVD方法,其可以通过减少或防止源气体的温度降低来沉积具有令人满意的性能的薄膜。 根据本发明的MOCVD装置将作为MO源气体的混合物的源气体与氧化气体一起提供给基板,从而形成膜。 MOCVD装置包括用于保持基板的基板支架; 沉积室,用于容纳衬底保持器; 供应机构,用于将源气体供应到衬底的表面; 以及加热装置,用于加热由基板保持器保持的基板。 沉积室包括用于容纳保持基板的基板保持器的基板容纳单元,以及连接到基板容纳单元并构成将源气体供应到基板的通道的通道容纳单元。 当通道容纳单元与基板的沉积平面平行地切割时,通道的横截面面积小于基板的沉积平面的面积。
    • 87. 发明授权
    • Apparatus and method for forming thin-film
    • 用于形成薄膜的设备和方法
    • US07074548B2
    • 2006-07-11
    • US10376253
    • 2003-03-03
    • Takeshi KijimaEiji NatoriMitsuhiro Suzuki
    • Takeshi KijimaEiji NatoriMitsuhiro Suzuki
    • B05D3/00B05D3/06
    • C23C18/1216B01J3/008B01J19/0013B01J19/123B01J19/125B01J19/1887B01J2219/00058B05D1/025B05D2401/90C23C18/12C23C18/1283C23C18/1287C23C18/14Y02P20/544
    • A method of forming a thin-film including a capability to remove contaminants from the formed thin-film and/or a substrate on which the thin-film is formed using alcohol. The method includes allowing a substrate holder to support a substract. A first mixture is produced by mixing a condensation polymer containing an element of metal oxide compound and alcohol. Then second mixture is produced by mixing supercritical fluid or liquid carbon dioxide and the first mixture. A thin film is formed by applying the second mixture on a surface of the substrate. After forming the thin-film, the substrate is cleaned by applying alcohol to upper and lower surfaces, preferably the whole upper and lower surfaces, of the substract. The thin-film is crystallized by heating, and the crystallizing may include applying oxygen in a crystallizing chamber. Soft X-rays may be applied to the substrate, during the forming of the thin-film on the surface of the substrate.
    • 一种形成薄膜的方法,该薄膜包括从形成的薄膜和/或使用酒精形成薄膜的基板去除污染物的能力。 该方法包括允许衬底保持器支撑减法。 通过混合含有金属氧化物和醇的元素的缩聚物来制备第一混合物。 然后通过混合超临界流体或液体二氧化碳和第一混合物产生第二混合物。 通过将第二混合物施加到基板的表面上来形成薄膜。 在形成薄膜之后,通过将酒精施加到底部的上表面和下表面,优选整个上表面和下表面来清洁基底。 薄膜通过加热结晶,结晶可以包括在结晶室中施加氧气。 在衬底表面形成薄膜期间,可以将软X射线施加到衬底上。