Abstract:
A dielectric layer can achieve a crystallography orientation similar to a base dielectric layer with a conductive layer disposed between the two dielectric layers. By providing a conductive layer having similar crystal structure and lattice parameters with the base dielectric layer, the crystallography orientation can be carried from the base dielectric layer, across the conductive layer to affect the dielectric layer. The process can be used to form capacitor structure for anisotropic dielectric materials, along the direction of high dielectric constant.
Abstract:
Embodiments provided herein describe methods for forming cadmium-manganese-telluride (CMT), such as for use in photovoltaic devices. A substrate including a material with a zinc blende crystalline structure is provided. CMT is formed above the substrate. During the formation of the CMT, cation-rich processing conditions are maintained. The resulting CMT may be more readily provided with p-type dopants when compared to conventionally-formed CMT.
Abstract:
An internal electrical field in a resistive memory element can be formed to reduce the forming voltage. The internal electric field can be formed by incorporating one or more charged layers within the switching dielectric layer of the resistive memory element. The charged layers can include adjacent charge layers to form dipole layers. The charged layers can be formed at or near the interface of the switching dielectric layer with an electrode layer. Further, the charged layer can be oriented with lower valence substitution side towards lower work function electrode, and higher valence substitution side towards higher work function electrode.
Abstract:
CMOS imaging sensors having fluorine-passivated structures to reduce dark current are disclosed together with methods of making thereof. The CIS comprises an array of pixels on a substrate, each pixel comprising a pinned photodiode, an isolation trench adjacent to the pinned photodiode, and a plurality of transistors. Methods of preparing a CIS comprise providing a source of fluorine (F) atoms, and annealing in the presence of the source of F atoms. After the annealing, at least one silicon-containing surface or region in the CIS comprises Si—F bonds and is fluorine passivated.
Abstract:
Steering elements suitable for memory device applications can have low leakage currents at low voltages to reduce sneak current paths for non selected devices, and high leakage currents at high voltages to minimize voltage drops during device switching. In some embodiments, the steering element can include a first electrode, a second electrode, and a graded dielectric layer sandwiched between the two electrodes. The graded dielectric layer can include a varied composition from the first electrode to the second electrode. Graded energy level at the top and/or at the bottom of the band gap, which can be a result of the graded dielectric layer composition, and/or the work function of the electrodes can be configured to suppress tunneling and thermionic current in an off-state of the steering element and/or to maximize a ratio of the tunneling and thermionic currents in an on-state and in an off-state of the steering element.
Abstract:
Electrodes, which contain molybdenum dioxide (MoO2) can be used in electronic components, such as memory or logic devices. The molybdenum-dioxide containing electrodes can also have little or no molybdenum element, together with a portion of molybdenum oxide, e.g., MoOx with x between 2 and 3. The molybdenum oxide can be present as molybdenum trioxide MoO3, or in Magneli phases, such as Mo4O11, MO8O23, or Mo9O26. The molybdenum-dioxide containing electrodes can be formed by annealing a multilayer including a layer of molybdenum and a layer of molybdenum oxide. The oxygen content of the multilayer can be configured to completely, or substantially completely, react with molybdenum to form molybdenum dioxide, together with leaving a small excess amount of molybdenum oxide MoOx with x>2.
Abstract:
Embodiments provided herein describe systems and methods for forming ferroelectric materials. A trench body may be provided. A trench may be formed in the trench body. A dielectric material and a filler material may be deposited within the trench. The filler material may be heated such that a stress is exerted on the dielectric material before the dielectric material is heated to generate a ferroelectric phase within the dielectric material. A non-contiguous layer may be formed above a substrate. A second layer including a high-k dielectric material may be formed above the first layer. The high-k dielectric material may be heated to generate a ferroelectric phase within the high-k dielectric material.
Abstract:
Provided are capacitor stacks for use in integrated circuits and methods of fabricating these stacks. A capacitor stack includes a dielectric layer and one or two inner electrode layers, such as a positive inner electrode layer and a negative inner electrode layer. The inner electrode layers directly interface the dielectric layer. The stack may also include outer electrode layers. The inner electrode layers are either chemically stable or weakly chemically unstable, while in contact with the dielectric layer based on the respective phase diagrams. Furthermore, the electron affinity of the positive inner electrode layer may be less than the electron affinity of the dielectric layer. The sum of the electron affinity and bandgap of the negative inner electrode layer may be less than that of the dielectric layer. In some embodiments, inner electrode layers are formed from heavily doped semiconducting materials, such as gallium arsenide or gallium aluminum arsenide.
Abstract:
Anisotropic materials, such as rutile TiO2, can exhibit dielectric constant of 170 along the tetragonal axis of (001) direction, and dielectric constant of 86 along directions perpendicular to the tetragonal axis. Layer of anisotropic material nanorods, such as TiO2 nanorods, can form a seed layer to grow a dielectric layer that can exhibit the higher dielectric constant value in a direction parallel to the substrate surface. The anisotropic layer can then be patterned to expose a surface normal to the high dielectric constant direction. A conductive material can be formed in contact with the exposed surface to create an electrode/dielectric stack along the direction of high dielectric constant.
Abstract:
Conducting materials having narrow impurity conduction bands can reduce the number of high energy excitations, and can be prepared by a sequence of plasma treatments. For example, a dielectric layer can be exposed to a first plasma ambient to form vacancy sites, and the vacancy-formed dielectric layer can be subsequently exposed to a second plasma ambient to fill the vacancy sites with substitutional impurities.