Abstract:
Methods are provided for treating germanium surfaces (200) in preparation for subsequent deposition, particularly gate dielectric deposition by atomic layer deposition (ALD). Prior to depositing, the germanium surface (200) is treated with plasma products or thermally reacted with vapor reactants. Examples of surface treatments leave oxygen bridges, nitrogen bridges, -OH, -NH and/or -NH 2 terminations that more readily adsorb ALD reactants. The surface treatments avoid deep penetration of the reactants into the germanium bulk but improve nucleation.
Abstract:
A relaxed silicon germanium structure comprises a silicon buffer layer produced using a chemical vapor deposition process with an operational pressure greater than approximately 1 torr. The relaxed silicon germanium structure further comprises a silicon germanium layer deposited over the silicon buffer layer. The silicon germanium layer has less than about 10 7 threading dislocations per square centimeter. By depositing the silicon buffer layer at a reduced deposition rate, the overlying silicon germanium layer can be provided with a "crosshatch free" surface.
Abstract:
Methods for controlling the grain structure of a polycrystalline Si-containing film involve depositing the film in stages so that the morphology of a first film layer deposited in an initial stage favorably influences the morphology of a second film layer deposited in a later stage. In an illustrated embodiment, the initial stage includes an anneal step. In another embodiment, the later stage involves depositing the second layer under different deposition conditions than for the first layer.
Abstract:
Thin, smooth silicon-containing films are prepared by deposition methods that utilize trisilane as a silicon source. In preferred embodiments, the methods result in Si-containing films that are continuous and have a thickness of about 150 Å or less, a surface roughness of about 5 Å rms or less, and a thickness non-uniformity of about 20% or less. Preferred silicon-containing films display a high degree of compositional uniformity when doped or alloyed with other elements. Preferred deposition methods provide improved manufacturing efficiency and can be used to make various useful structures such as wetting layers, HSG silicon, quantum dots, dielectric layers, anti-reflective coatings (ARC's), gate electrodes and diffusion sources.
Abstract:
Processes for forming Mo and W containing thin films, such as MoS 2 , WS 2 , MoSe 2 , and WSe 2 thin films are provided. Methods are also provided for synthesizing Mo or W beta-diketonate precursors. Additionally, methods are provided for forming 2D materials containing Mo or W.
Abstract:
In some aspects, methods of forming a metal sulfide thin film are provided. According to some methods, a metal sulfide thin film is deposited on a substrate in a reaction space in a cyclical process where at least one cycle includes alternately and sequentially contacting the substrate with a first vapor-phase metal reactant and a second vapor-phase sulfur reactant. In some aspects, methods of forming a three-dimensional architecture on a substrate surface are provided. In some embodiments, the method includes forming a metal sulfide thin film on the substrate surface and forming a capping layer over the metal sulfide thin film. The substrate surface may comprise a high-mobility channel.
Abstract:
Methods and structures relating to the formation of mixed SAMs for preventing undesirable growth or nucleation on exposed surfaces inside a reactor are described. A mixed SAM (322) can be formed on surfaces (308) for which nucleation is not desired by introducing a first SAM precursor having molecules of a first length (334) and a second SAM precursor having molecules of a second length (338) shorter than the first. Examples of exposed surfaces for which a mixed SAM (322) can be provided over include reactor surfaces and select surfaces of integrated circuit structures (800), such as insulator and dielectric layers.
Abstract:
Methods are disclosed herein for depositing a passivation layer comprising fluorine over a dielectric material that is sensitive to chlorine, bromine, and iodine. The passivation layer can protect the sensitive dielectric layer thereby enabling deposition using precursors comprising chlorine, bromine, and iodine over the passivation layer.
Abstract:
A valve (100) comprises a valve seat (102) and a movable diaphragm (104). The valve seat (102) defines a fluid orifice (106) and is formed at least partially of polybenzimidazole. The diaphragm (104) is sized and configured to bear against the fluid orifice (106) to substantially block fluid flow through the orifice (106). The valve (100) is advantageously used in a hot zone (34) of a semiconductor processing system.
Abstract:
Metallic-compound films are formed by plasma-enhanced atomic layer deposition (PEALD). According to preferred methods, film or thin film composition is controlled by selecting plasma parameters to tune the oxidation state of a metal (or plurality of metals) in the film. In some embodiments, plasma parameters are selected to achieve metal-rich metallic-compound films. The metallic-compound films can be components of gate stacks, such as gate electrodes. Plasma parameters can be selected to achieve a gate stack with a predetermined work function.