摘要:
A semiconductor body includes ordered clusters of less then 100 angstroms in size and preferably, no more than 12 to 30 angstroms in size. The material is characterized by a decoupling of physical properties of the material from the morphology of the material.
摘要:
A non-volatile memory element includes a first interlayer insulation layer 11 having a first through-hole 11a, a second interlayer insulation layer 12 having a second through-hole 12a formed on the first interlayer insulation layer 11, a bottom electrode 13 provided in the first through-hole 11, recording layer 15 containing phase change material provided in the second through-hole 12, a top electrode 16 provided on the second interlayer insulation layer 12, and a thin-film insulation layer 14 formed between the bottom electrode 13 and the recording layer 15. In accordance with this invention, the diameter D1 of a bottom electrode 13 buried in a first through-hole 11a is smaller than the diameter D2 of a second through-hole 12a, thereby decreasing the thermal capacity of the bottom electrode 13. Therefore, when a pore 14a is formed by dielectric breakdown in a thin-film insulation layer 14 and the vicinity is used as a heating region, the amount of heat escaping to the bottom electrode 13 is decreased, resulting in higher heating efficiency.
摘要:
A method of programming a phase-change material. The method includes providing a transformation pulse to the phase-change material, where the transformation pulse includes a programming waveform and a conditioning waveform. The programming waveform provides sufficient energy to alter the structural state of the phase-change material. In one embodiment, the programming waveform alters the volume fractions of crystalline and amorphous phase regions within the phase-change material. The conditioning waveform provides sufficient energy to heat the phase-change material to a temperature above the ambient temperature but below the crystallization temperature of the phase-change material. The method programs the phase-change material to a state that exhibits a reduced time variation of resistance.
摘要:
A radial memory device includes a phase-change material, a first electrode in electrical communication with the phase-change material, the first electrode having a substantially planar first area of electrical communication with the phase-change material. The radial memory device also includes a second electrode in electrical communication with the phase-change material, the second electrode having a second area of electrical communication with the phase-change material, the second area being laterally spacedly disposed from the first area and substantially circumscribing the first area.Further, a method of making a memory device is disclosed. The steps include depositing a first electrode, depositing a first insulator, configuring the first insulator to define a first opening. The first opening provides for a generally planar first contact of the first electrode. The method further including the steps of depositing a phase-change material, depositing a second insulator, configuring the second insulator, depositing a second electrode having a second contact laterally displaced from said first contact, and configuring said second electrode.
摘要:
A non-volatile memory element comprises a bottom electrode 12; a top electrode 15; and a recording layer 13 containing phase change material and a block layer 14 that can block phase change of the recording layer 13, provided between the bottom electrode 12 and the top electrode 15. The block layer 14 is constituted of material having an electrical resistance that is higher than that of material constituting the recording layer 13. The block layer 14 suppresses the radiation of heat towards the top electrode 15 and greatly limits the phase change region when a write current is applied. The result is a high heating efficiency. The top electrode 15 itself can be used to constitute a bit line, or a separate bit line can be provided.
摘要:
A phase-change memory device includes a first insulator having a hole therethrough, a first electrode that conforms at least partially to the hole, a phase-change material in electrical communication with the first electrode, and a second electrode in electrical communication with the phase-change material. When current is passed from the first electrode to the second electrode through the phase-change material, at least one of the first and second electrodes remains unreactive with the phase change material.
摘要:
A programmable resistance memory combines multiple cells into a block that includes one or more shared electrodes. The shared electrode configuration provides additional thermal isolation for the active region of each memory cell, thereby reducing the current required to program each memory cell.
摘要:
A multi-layer chalcogenide, memory or switching device. The device includes an active region disposed between a first terminal and a second terminal. The active region includes a first layer and a second layer, where one of the layers is a heterogeneous layer that includes an operational component and a promoter component. The other layer may be a homogeneous or heterogeneous layer. In exemplary embodiments, the operational component is a chalcogenide or phase change material and the promoter component is an insulating or dielectric material. Inclusion of the promoter component provides beneficial performance characteristics such as a reduction in reset current or minimization of formation requirements.
摘要:
A memory device includes a phase-change material and a first electrode in electrical communication with the phase-change material. Also included is a second electrode in electrical communication with the phase-change material and a dielectric layer. The dielectric layer is disposed between the first electrode and the second electrode. The dielectric layer has an opening therethrough. The phase-change material is disposed on both sides of the dielectric layer and within the opening. Electrical communication within the device is by means of virtual contacts.
摘要:
A non-volatile memory element includes a first interlayer insulation layer 11 having a first through-hole 11a, a second interlayer insulation layer 12 having a second through-hole 12a formed on the first interlayer insulation layer 11, a bottom electrode 13 provided in the first through-hole 11, recording layer 15 containing phase change material provided in the second through-hole 12, a top electrode 16 provided on the second interlayer insulation layer 12, and a thin-film insulation layer 14 formed between the bottom electrode 13 and the recording layer 15. In accordance with this invention, the diameter D1 of a bottom electrode 13 buried in a first through-hole 11a is smaller than the diameter D2 of a second through-hole 12a, thereby decreasing the thermal capacity of the bottom electrode 13. Therefore, when a pore 14a is formed by dielectric breakdown in a thin-film insulation layer 14 and the vicinity is used as a heating region, the amount of heat escaping to the bottom electrode 13 is decreased, resulting in higher heating efficiency.