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    • 1. 发明专利
    • Nonvolatile semiconductor memory device and rewriting method therefor
    • 非易失性半导体存储器件及其优化方法
    • JP2008123690A
    • 2008-05-29
    • JP2008024514
    • 2008-02-04
    • National Institute Of Advanced Industrial & TechnologySharp Corpシャープ株式会社独立行政法人産業技術総合研究所
    • HOSOI YASUNARIAWAYA NOBUYOSHIINOUE AKIRA
    • G11C13/00H01L27/10
    • PROBLEM TO BE SOLVED: To provide a nonvolatile semiconductor memory device in which stable high speed switching operation for a variable resistance element having resistance property changeable by applying of voltage to the element is performed. SOLUTION: A load circuit for applying voltage to a variable resistance element is provided so as to be connectable electrically in series with the variable resistance element, the load resistance property of the load circuit can be switched between two different properties, two load resistance properties of the load circuit are switched selectively when the resistance property of the variable resistance element transitions from a low resistance state to a high resistance state and when it transits from the high resistance state to the low resistance state, voltage required for transition from one side of two resistance properties to the other is applied to the variable resistance element by voltage for rewriting applied to a series circuit of the variable resistance element and the load circuit, after transition of the resistance property of the variable resistance element from one side to the other side, voltage applied to the variable resistance element becomes voltage which cannot be restored to the resistance property of one side from the resistance property of the other side by the selected load resistance property. COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供一种非易失性半导体存储器件,其中对可变电阻元件进行稳定的高速切换操作,该可变电阻元件具有可通过向该元件施加电压而改变的电阻特性。 解决方案:提供一种向可变电阻元件施加电压的负载电路,以便与可变电阻元件串联电连接,负载电路的负载电阻属性可以在两种不同的特性之间切换,两个负载 当可变电阻元件的电阻特性从低电阻状态转变为高电阻状态并且当其从高电阻状态转变到低电阻状态时,负载电路的电阻特性被选择性地切换,从一个 将另一方的两个电阻特性的一侧通过用于重写的电压施加到可变电阻元件,该电压在可变电阻元件和负载电路的串联电路从一侧转换到可变电阻元件的电阻特性之后 另一方面,施加到可变电阻元件的电压变成无法施加的电压 通过选择的负载电阻特性,可以将一侧的电阻特性从另一侧的电阻特性恢复。 版权所有(C)2008,JPO&INPIT
    • 2. 发明专利
    • Nonvolatile semiconductor memory device
    • 非易失性半导体存储器件
    • JP2007188603A
    • 2007-07-26
    • JP2006006738
    • 2006-01-13
    • National Institute Of Advanced Industrial & TechnologySharp Corpシャープ株式会社独立行政法人産業技術総合研究所
    • HOSOI YASUNARIAWAYA NOBUYOSHIINOUE AKIRA
    • G11C13/00H01L27/10
    • G11C13/0069G11C13/0007G11C13/003G11C2013/009G11C2213/31G11C2213/32G11C2213/72G11C2213/76G11C2213/79
    • PROBLEM TO BE SOLVED: To provide a nonvolatile semiconductor memory device in which stable high speed switching operation can be performed for a variable resistance element in which a resistance property is varied by applying voltage. SOLUTION: A load circuit for applying voltage to the variable resistance element is provided so as to be connected in series to the variable resistance element electrically, a load resistance property of the load circuit is constituted so as to be switchable between two different properties, two load resistance properties of the load circuit are switched selectively depending on whether the resistance property of the variable resistance element is shifted from a low resistance state to a high resistance state or it is shifted from the high resistance state to the low resistance state, voltage required for shifting from one state to the other in two resistance properties is applied to the variable resistance element by voltage for rewriting applied to the series circuit of the variable resistance element and the load circuit, after the resistance property of the variable resistance element is shifted from one state to the other, voltage applied to the variable resistance element can be restored from the other resistance property to one resistance property by the selected load resistance property. COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提供一种非易失性半导体存储器件,其中可以对通过施加电压来改变电阻特性的可变电阻元件执行稳定的高速切换操作。 解决方案:提供用于向可变电阻元件施加电压的负载电路,以与电可变电阻元件串联连接,负载电路的负载电阻特性被构造成可在两个不同的可变电阻元件之间切换 选择性地切换负载电路的两个负载电阻特性,这取决于可变电阻元件的电阻特性是从低电阻状态转移到高电阻状态还是从高电阻状态转移到低电阻状态 在可变电阻元件的电阻特性之后,通过施加到可变电阻元件和负载电路的串联电路的重写电压,将可变电阻元件施加到两个电阻特性中从一个状态向另一个状态移动所需的电压 从一个状态转移到另一个状态,施加到可变电阻元件的电压可以 通过选择的负载电阻特性从另一个电阻特性恢复到一个电阻特性。 版权所有(C)2007,JPO&INPIT
    • 4. 发明专利
    • Magnetic switching element and memory device using it
    • 磁性开关元件及其使用的存储器件
    • JP2005129908A
    • 2005-05-19
    • JP2004267239
    • 2004-09-14
    • Matsushita Electric Ind Co LtdNational Institute Of Advanced Industrial & Technology松下電器産業株式会社独立行政法人産業技術総合研究所
    • ODAKAWA AKIHIROSATO HIROSHIYAMADA JUICHIISHII YUJIINOUE AKIRAAKAHO HIROSHIKAWASAKI MASASHITAKAGI HIDENORI
    • G11B5/39H01L21/8246H01L27/105H01L29/82H01L43/08
    • PROBLEM TO BE SOLVED: To provide a method for inverting the magnetized state in a magnetic body with high energy conversion efficiency, a magnetic switching element which substantially reduces energy consumption of the entire magnetic device that changes the magnetized state provided by an external magnetic field, and a memory device using the magnetic switching element. SOLUTION: A magnetic switching element comprises at least one transfer body (1), at least one electrode (2), and at least one free magnetic body (3). The transfer body (1) of the magnetic switching element is made of a perovskite compound containing at least a rare-earth element and an alkaline earth metal. On the transfer body (1), the electrode (2) and the free magnetic body (3) are placed so that they are in parallel with each other, and that they are separated from each other. At least one free magnetic body (3) is magnetically coupled to the transfer body (1), and the transfer body (1) is transferred to a ferromagnetic state or an antiferromagnetic state through injection/induction of electrons/holes, thereby changing at least one magnetization direction of the free magnetic body (3). COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:为了提供一种用于以高能量转换效率来反转磁体的磁化状态的方法,磁性开关元件显着降低整个磁性器件的能量消耗,从而改变由外部电路提供的磁化状态 磁场,以及使用该磁性开关元件的存储器件。 解决方案:磁性开关元件包括至少一个转移体(1),至少一个电极(2)和至少一个自由磁体(3)。 磁性开关元件的转移体(1)由至少包含稀土元素和碱土金属的钙钛矿化合物制成。 在转印体(1)上,电极(2)和自由磁体(3)彼此平行放置,并且彼此分离。 至少一个自由磁体(3)磁耦合到传输体(1),并且传输体(1)通过注入/感应电子/孔而被转移到铁磁状态或反铁磁状态,从而至少改变 自由磁体(3)的一个磁化方向。 版权所有(C)2005,JPO&NCIPI
    • 6. 发明专利
    • Electronic component
    • 电子元件
    • JP2005064397A
    • 2005-03-10
    • JP2003295641
    • 2003-08-19
    • Matsushita Electric Ind Co LtdNational Institute Of Advanced Industrial & Technology松下電器産業株式会社独立行政法人産業技術総合研究所
    • INOUE AKIRAODAKAWA AKIHIROYAMADA HIROYUKITAKAGI HIDENORIKAWASAKI MASASHIAKAHO HIROSHITOKURA YOSHINORI
    • H01L27/10
    • PROBLEM TO BE SOLVED: To fabricate a nonvolatile random access memory (NVRAM) with a device that does not use any dopant at all.
      SOLUTION: A heteroepitaxial junction interface between different oxide insulators is used for the NVRAM device. The electrical resistance value for the electric current flowing in the junction interface parallel to the interface is changed in a nonvolatile manner by an electric current or voltage pulse applied to the junction interface via the same path as that of the electric current. A two terminal NVRAM device that can write, read and erase information repetitively is provided by utilizing the nonvolatile change of the electrical resistance of the interface by the pulse. The junction between the two different oxide insulators is, for example, a junction between perovskite-type oxides expressed respectively by chemical formulas ABO
      3 and CDO
      3 , where A and C are alkali metals (group 1A of the periodic table), alkaline-earth metals (group 2A of the periodic table), or rare-earth elements; B is a transition metal (groups 2B to 7B, and group 8 of the periodic table) or an element of groups 3A to 5A of the periodic table. O is oxygen. The elements of A and B may be mutually exchanged. Also, both A and B may be transition metals.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:使用不使用任何掺杂剂的器件制造非易失性随机存取存储器(NVRAM)。

      解决方案:NVRAM器件使用不同氧化物绝缘体之间的异质外延结界面。 通过与电流相同的路径,通过施加到接合界面的电流或电压脉冲以非易失性方式改变在与界面平行的接合界面中流动的电流的电阻值。 通过利用脉冲对接口的电阻的非易失性变化,可以重复地写入,读取和擦除信息的双端NVRAM器件。 两种不同的氧化物绝缘体之间的连接点是例如分别由化学式ABO 3 和CDO 3 表示的钙钛矿型氧化物之间的连接点,其中A和C是 碱金属(元素周期表中的1A族),碱土金属(元素周期表2A族)或稀土元素; B是过渡金属(元素周期表的2B至7B族和第8族)或元素周期表3A至5A族的元素。 O是氧气。 A和B的元素可以相互交换。 此外,A和B都可以是过渡金属。 版权所有(C)2005,JPO&NCIPI

    • 7. 发明专利
    • Switching element
    • 开关元件
    • JP2007053125A
    • 2007-03-01
    • JP2005235131
    • 2005-08-15
    • National Institute Of Advanced Industrial & Technology独立行政法人産業技術総合研究所
    • INOUE AKIRAAKINAGA HIROYUKIYASUDA SHUICHIROTAKAGI HIDENORI
    • H01L49/02H01L27/10H01L45/00H01L49/00
    • H01L45/04H01L45/1233H01L45/146H01L45/1625H01L45/1675
    • PROBLEM TO BE SOLVED: To provide a switching element which exhibits two of largely different resistance characteristics non-reciprocally and repetitively and can be applied to a highly integrated non-volatile memory. SOLUTION: The switching element is provided with a variable resistance element in which a metal oxide thin film consisting of a single center metal element including composition fluctuation is interposed between two electrodes. In the switching element, a control circuit capable of selectively applying: a voltage or a current of not less than a first threshold; a voltage or a current not more than a second threshold having an absolute value lower than that of the first threshold; and a voltage or a current not more than a third threshold having an absolute value lower than that of the second threshold, is connected between both the electrodes. In the switching element, a resistance characteristic between the electrodes in a potential region or a current region whose absolute value is at least not more than the third threshold is allowed to non-reciprocally change at 1,000-10,000 times. COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提供一种开关元件,该开关元件不是相互重复地展现出两个具有很大不同的电阻特性,并且可以应用于高度集成的非易失性存储器。 解决方案:开关元件设置有可变电阻元件,其中由包括组成波动的单个中心金属元件组成的金属氧化物薄膜插入在两个电极之间。 在开关元件中,能够选择性地施加:不小于第一阈值的电压或电流的控制电路; 具有绝对值低于第一阈值的绝对值的不大于第二阈值的电压或电流; 并且在两个电极之间连接具有绝对值低于第二阈值的绝对值的不大于第三阈值的电压或电流。 在开关元件中,允许绝缘值至少不大于第三阈值的电位区域或电流区域中的电极之间的电阻特性在1,000-10,000次之间不可逆地变化。 版权所有(C)2007,JPO&INPIT