Abstract:
Apparatuses and methods for high-deposition-rate sputtering for depositing layers onto a substrate are disclosed. The apparatuses generally comprise a process chamber; one or more sputtering sources disposed within the process chamber, wherein each sputtering source comprises a sputtering target; a substrate support disposed within the process chamber; a shield positioned between the sputtering sources and the substrate, the shield comprising an aperture positioned under each sputtering source; and a transport system connected to the substrate support capable of positioning the substrate such that one of a plurality of site-isolated regions on the substrate can be exposed to sputtered material through the aperture positioned under each of the sputtering sources; wherein the spacing between the sputtering target and the substrate is less than 100 mm. The apparatus enables high deposition rate sputtering onto site-isolated regions on the substrate.
Abstract:
Provided are resistive random access memory (ReRAM) cells and methods of fabricating thereof. A stack including a defect source layer, a defect blocking layer, and a defect acceptor layer disposed between the defect source layer and the defect blocking layer may be subjected to annealing. During the annealing, defects are transferred in a controllable manner from the defect source layer to the defect acceptor layer. At the same time, the defects are not transferred into the defect blocking layer thereby creating a lowest concentration zone within the defect acceptor layer. This zone is responsible for resistive switching. The precise control over the size of the zone and the defect concentration within the zone allows substantially improvement of resistive switching characteristics of the ReRAM cell. In some embodiments, the defect source layer includes aluminum oxynitride, the defect blocking layer includes titanium nitride, and the defect acceptor layer includes aluminum oxide.
Abstract:
Molybdenum oxide can be used to form switching elements in a resistive memory device. The atomic ratio of oxygen to molybdenum can be between 2 and 3. The molybdenum oxide exists in various Magneli phases, such as Mo13O33, Mo4O11, Mo17O47, Mo8O23, or Mo9O26. An electric field can be established across the switching layers, for example, by applying a set or reset voltage. The electric field can cause movement of the oxygen charges, e.g., O2− ions, changing the composition profile of the switching layers, forming bistable states, including a high resistance state with MoO3 and a low resistance state with MoOx (x
Abstract:
Embodiments of the present invention provide vapor deposition tools. In one example, a vapor deposition tool includes housing. A substrate support is positioned within the housing and configured to support a substrate. A backing plate is positioned above the substrate support. A showerhead is positioned between the substrate support and the backing plate and has a plurality of openings therethrough. A fluid trap member is positioned around a periphery of the showerhead. A fluid trap member actuator is coupled to the fluid trap member and configured to move the fluid trap member between first and second positions relative to the backing plate.
Abstract:
This disclosure provides (a) methods of making an oxide layer (e.g., a dielectric layer) based on yttrium and titanium, to have a high dielectric constant and low leakage characteristic and (b) related devices and structures. An oxide layer having both yttrium and titanium may be fabricated either as an amorphous oxide or as an alternating series of monolayers. In several embodiments, the oxide is characterized by a yttrium contribution to total metal that is specifically controlled. The oxide layer can be produced as the result of a reactive process, if desired, via either a PVD process or, alternatively, via an atomic layer deposition process that employs specific precursor materials to allow for a common process temperature window for both titanium and yttrium reactions.
Abstract:
This disclosure provides a method of fabricating a semiconductor device layer and an associated memory cell. Empirical data may be used to generate a hysteresis curve associated with deposition for a metal-insulator-metal structure, with curve measurements reflecting variance of an electrical property as a function of cathode voltage used during a sputtering process. By generating at least one voltage level to be used during the sputtering process, where the voltage reflects a suitable value for the electrical property from among the values obtainable in mixed-mode deposition, a semiconductor device layer may be produced with improved characteristics and durability. A multistable memory cell or array of such cells manufactured according to this process can, for a set of given materials, be fabricated to have minimal leakage or “off” current characteristics (Ileak or Ioff, respectively) or a maximum ratio of “on” current to “off” current (Ion/Ioff).
Abstract:
Embodiments generally include a method of forming a nonvolatile memory device that contains a resistive switching memory element that has an improved device switching capacity by using multiple layers of variable resistance layers. In one embodiment, the resistive switching element comprises at least three layers of variable resistance materials to increase the number of logic states. Each variable resistance layer may have an associated high resistance state and an associated low resistance state. As the resistance of each variable resistance layer determines the digital data bit that is stored, the multiple variable resistance layers per memory element allows for additional data storage without the need to further increase the density of nonvolatile memory devices. Typically, resistive switching memory elements may be formed as part of a high-capacity nonvolatile memory integrated circuit, which can be used in various electronic devices, such as digital cameras, mobile telephones, handheld computers, and music players.
Abstract:
Substrate processing systems and methods are described for processing substrates having two or more regions. The processing includes one or more of molecular self-assembly and combinatorial processing. At least one of materials, processes, processing conditions, material application sequences, and process sequences is different for the processing in at least one region of the substrate relative to at least one other region of the substrate. Processing systems are described that include numerous processing modules. The modules include a site-isolated reactor (SIR) configured for one or more of molecular self-assembly and combinatorial processing of a substrate.
Abstract:
A method for forming a DRAM MIM capacitor stack having low leakage current and low EOT involves the use of an compound high k dielectric material. The dielectric material further comprises a dopant. One component of the compound high k dielectric material is present in a concentration between about 30 atomic % and about 80 atomic and more preferably between about 40 atomic % and about 60 atomic %. In some embodiments, the compound high k dielectric material comprises an alloy of TiO2 and ZrO2 and further comprises a dopant of Al2O3. In some embodiments, the compound high k dielectric material comprises an admixture of TiO2 and HfO2 and further comprises a dopant of Al2O3.
Abstract translation:用于形成具有低漏电流和低EOT的DRAM MIM电容器堆叠的方法涉及使用复合高k电介质材料。 电介质材料还包括掺杂剂。 复合高k介电材料的一个组分以约30原子%至约80原子之间的浓度存在,更优选约40原子%至约60原子%之间。 在一些实施方案中,化合物高k介电材料包含TiO 2和ZrO 2的合金,并且还包含Al 2 O 3的掺杂剂。 在一些实施方案中,化合物高k介电材料包含TiO 2和HfO 2的混合物,并且还包含Al 2 O 3的掺杂剂。
Abstract:
Multistate nonvolatile memory elements are provided. The multistate nonvolatile memory elements contain multiple layers. Each layer may be based on a different bistable material. The bistable materials may be resistive switching materials such as resistive switching metal oxides. Optional conductor layers and current steering elements may be connected in series with the bistable resistive switching metal oxide layers.