摘要:
A ferroelectric transistor gate structure with a ferroelectric gate and a high-k insulator is provided. The high-k insulator may serve as both a gate dielectric and an insulator to reduce, or eliminate, the diffusion of oxygen or hydrogen into the ferroelectric gate. A method of forming the ferroelectric gate structure is also provided. The method comprises the steps of forming a sacrificial gate structure, removing the sacrificial gate structure, depositing a high-k insulator, depositing a ferroelectric material, polishing the ferroelectric material using CMP, and forming a top electrode overlying the ferroelectric material.
摘要:
A method of fabricating a nano-scale resistance cross-point memory array includes preparing a silicon substrate; depositing silicon oxide on the substrate to a predetermined thickness; forming a nano-scale trench in the silicon oxide; depositing a first connection line in the trench; depositing a memory resistor layer in the trench on the first connection line; depositing a second connection line in the trench on the memory resistor layer; and completing the memory array. A cross-point memory array includes a silicon substrate; a first connection line formed on the substrate; a colossal magnetoresistive layer formed on the first connection line; a silicon nitride layer formed on a portion of the colossal magnetoresistive layer; and a second connection line formed adjacent the silicon nitride layer and on the colossal magnetoresistive layer.
摘要:
An integrated circuit device, and a method of manufacturing the same, comprises an epitaxial nickel silicide on (100) Si, or a stable nickel silicide on amorphous Si, fabricated with a cobalt interlayer. In one embodiment the method comprises depositing a cobalt (Co) interface layer between the Ni and Si layers prior to the silicidation reaction. The cobalt interlayer regulates the flux of the Ni atoms through the cobalt/nickel/silicon alloy layer formed from the reaction of the cobalt interlayer with the nickel and the silicon so that the Ni atoms reach the Si interface at a similar rate, i.e., without any orientation preference, so as to form a uniform layer of nickel silicide. The nickel silicide may be annealed to form a uniform crystalline nickel disilicide. Accordingly, a single crystal nickel silicide on (100) Si or on amorphous Si is achieved wherein the nickel silicide has improved stability and may be utilized in ultra-shallow junction devices.
摘要:
A conductive barrier, useful as a ferroelectric capacitor electrode, having high temperature stability has been provided. This conductive barrier permits the use of iridium (Ir) metal in IC processes involving annealing. Separating silicon substrate from Ir film with an intervening, adjacent, tantalum (Ta) film has been found to very effective in suppressing diffusion between layers. The Ir prevents the interdiffusion of oxygen into the silicon during annealing. A Ta or TaN layer prevents the diffusion of Ir into the silicon. This Ir/TaN structure protects the silicon interface so that adhesion, conductance, hillock, and peeling problems are minimized. The use of Ti overlying the Ir/TaN structure also helps prevent hillock formation during annealing. A method of forming a multilayer Ir conductive structure and Ir ferroelectric electrode are also provided.
摘要:
An Ir—M—O composite film has been provided that is useful in forming an electrode of a ferroelectric capacitor, where M includes a variety of refractory metals. The Ir combination film is resistant to high temperature annealing in oxygen environments. When used with an underlying barrier layer made from the same variety of M transition metals, the resulting conductive barrier also suppresses to diffusion of Ir into any underlying Si substrates. As a result, Ir silicide products are not formed, which degrade the electrode interface characteristics. That is, the Ir combination film remains conductive, not peeling or forming hillocks, during high temperature annealing processes, even in oxygen. The Ir—M—O conductive electrode/barrier structures are useful in nonvolatile FeRAM devices, DRAMs, capacitors, pyroelectric infrared sensors, optical displays, optical switches, piezoelectric transducers, and surface acoustic wave devices. A method for forming an Ir—M—O composite film barrier layer and an Ir—M—O composite film ferroelectric electrode are also provided.
摘要:
An electroluminescence (EL) device and a method are provided for fabricating said device with a nanotip electrode. The method comprises: forming a bottom electrode with nanotips; forming a Si phosphor layer adjacent the nanotips; and, forming a transparent top electrode. The Si phosphor layer is interposed between the bottom and top electrodes. The nanotips may have a tip base size of about 50 nanometers, or less, a tip height in the range of 5 to 50 nm, and a nanotip density of greater than 100 nanotips per square micrometer. Typically, the nanotips are formed from iridium oxide (IrOx) nanotips. A MOCVD process forms the Ir bottom electrode. The IrOx nanotips are grown from the Ir. In one aspect, the Si phosphor layer is a SRSO layer. In response to an SRSO annealing step, nanocrystalline SRSO is formed with nanocrystals having a size in the range of 1 to 10 nm.
摘要:
A nanotip capacitor and associated fabrication method are provided. The method provides a bottom electrode and grows electrically conductive nanotips overlying the bottom electrode. An electrically insulating dielectric is deposited overlying the nanotips, and an electrically conductive top electrode is deposited overlying dielectric-covered nanotips. Typically, the dielectric is deposited by forming a thin layer of dielectric overlying the nanotips using an atomic layer deposition (ALD) process. In one aspect, the electrically insulating dielectric covering the nanotips forms a three-dimensional interface of dielectric-covered nanotips. Then, the electrically conductive top electrode overlying the dielectric-covered nanotips forms a three-dimensional top electrode interface, matching the first three-dimensional interface of the dielectric-covered nanotips.
摘要:
A method is provided for forming a NanoElectroChemical (NEC) cell. The method provides a bottom electrode with a top surface. Nanowire shells are formed. Each nanowire shell has a nanowire and a sleeve, with the nanowire connected to the bottom electrode top surface. A top electrode is formed overlying the nanowire shells. A main cavity is formed between the top electrode and bottom electrodes, partially displaced by a first plurality of nanowire shells. Electrolyte cavities are formed between the sleeves and nanowires by etching the first sacrificial layer. In one aspect, electrolyte cavities are formed between the bottom electrode top surface and a shell coating layer joining the sleeve bottom openings. Then, the main and electrolyte cavities are filled with either a liquid or gas phase electrolyte. In a different aspect, the first sacrificial layer is a solid phase electrolyte that is not etched away.
摘要:
A method of fabricating a photovoltaic cell for use in a solar cell structure includes preparing a first substrate; preparing a TiO2 precursor; preparing a cold wall CVD chamber; placing the first substrate in the cold wall CVD chamber; forming a transparent conducting electrode on the first substrate; depositing a porous column TiO2 film on the transparent conducting electrode; depositing a photosensitive material in and on the porous column TiO2 film; forming a top electrode on the photovoltaic cell; and incorporating the photovoltaic cell into a solar cell structure. The method of the invention is suitable for forming photovoltaic cells which may be of the dye-sensitized solar cell (DSSC) type, having a liquid or solid-state electrolyte therein, or an ordered organic-inorganic heterojunction photovoltaic cell.
摘要:
A method is provided for forming a single-phase c-axis PGO film overlying a Pt metal electrode. Although the method is summarized in the context of a Pt bottom electrode, it has a broader application to other noble metals. The method comprises: forming a bottom electrode mixture of Pt and Pt3O4; forming a single-phase c-axis PGO thin film overlying the bottom electrode; and, forming a top electrode overlying the PGO thin film. Forming a bottom electrode mixture of a Pt and Pt3O4 includes: forming a Pt first layer; and, forming a second layer, interposed between the first layer and the PGO thin film, of fully oxidized Pt3O4. In other aspects, forming a bottom electrode mixture of Pt and Pt3O4 includes forming a polycrystalline mixture of Pt and Pt3O4. A c-axis PGO film capacitor is also provided. Again, a Pt bottom electrode is described, along with other noble metal bottom electrodes.
摘要翻译:提供了用于形成覆盖在Pt金属电极上的单相c轴PGO膜的方法。 虽然该方法在Pt底部电极的上下文中总结,但是其更适用于其它贵金属。 该方法包括:形成Pt和Pt 3 O 4的底部电极混合物; 形成覆盖在底部电极上的单相c轴PGO薄膜; 并且形成覆盖PGO薄膜的顶部电极。 形成Pt和Pt 3 N 4 O 4的底部电极混合物包括:形成Pt第一层; 并且形成介于第一层和PGO薄膜之间的完全氧化的Pt 3 O 4 O 4的第二层。 在其它方面,形成Pt和Pt 3 O 4的底部电极混合物包括形成Pt和Pt 3 O 3的多晶混合物 > 4 SUB>。 还提供了一个c轴PGO薄膜电容器。 同样地,描述了Pt底部电极以及其它贵金属底部电极。