Abstract:
A precursor source vessel (100) comprises a vessel body (104), a passage (145) within the vessel body (104), and a valve (108, 110, 210) attached to a surface of the body (104). An internal chamber (111) is adapted to contain a chemical reactant, and the passage (145) extends from outside the body (104) to the chamber (111). The valve (108, 110, 210) regulates flow through the passage (145). The vessel (100) has inlet and outlet valves (108, 110), and optionally a vent valve (210) for venting internal gas. An external gas panel (97) can include at least one valve (182) fluidly interposed between the outlet valve (110) and a substrate reaction chamber (162). Gas panel valves (182) can each be positioned along a plane that is generally parallel to, and no more than about 10.0 cm from, a flat surface of the vessel (100). Filters (130) in a vessel Hd (106) or wall filter gas flow through the vessel's valves (108, 110, 210). A quick-connection assembly (102) allows fast and easy connection of the vessel (100) to a gas panel (97).
Abstract:
A reactor (10) for processing a plurality of workpieces (18) including a support (16) for holding the plurality of workpieces, a first processing zone (12), one or more radiant heating elements (120) adapted to heat a plurality of workpieces positioned in the first processing zone, a second processing zone (14), one or more resistive heating elements (140) adapted to heat a plurality of workpieces positioned in the second processing zone, and an apparatus (20) for moving the support between the first processing zone and the second processing zone.
Abstract:
A semiconductor workpiece including a substrate 10, a relaxed buffer layer 14, 18 including a graded portion formed on the substrate, and at least one strained transitional layer 16 within the graded portion of the relaxed buffer layer 14, 18 and method of manufacturing the same. The at least one strained transitional layer 16 reduces an amount of workpiece bow due to differential coefficient of thermal expansion (CTE) contraction of the relaxed buffer layer 14, 18 relative to CTE contraction of the substrate 10.
Abstract:
Chloropolysilanes are utilized in methods and systems for selectively depositing thin films useful for the fabrication of various devices such as microelectronic and/or microelectromechanical systems (MEMS).
Abstract:
A doped silicon layer is formed in a batch process chamber 529 at low temperatures. The silicon precursor 580 for the silicon layer formation is a polysilane, such as trisilane, and the dopant precursor 582 is an n-type dopant, such as phosphine. The silicon precursor 580 can be flowed into the process chamber 529 with the flow of the dopant precursor 582 or separately from the flow of the dopant precursor 582. Surprisingly, deposition rate is independent of dopant precursor flow, while dopant incorporation linearly increases with the dopant precursor flow.
Abstract:
A substrate support system (140, 200, 300) comprises a relatively thin circular substrate holder (100) having a plurality of passages (116, 118, 120, 240, 340) extending between top and bottom surfaces thereof. The substrate holder (100) includes a single substrate support ledge or a plurality of substrate support spacer vanes (124) configured to support a peripheral portion of the substrate backside (154) so that a thin gap (152) is formed between the substrate (16) and the substrate holder (100). The vanes (124) can be angled to resist backside deposition of reactant gases as the substrate holder (100) is rotated. A hollow support member (22, 204, 304) provides support to an underside (106) of the substrate holder (100). The hollow support member (22, 204, 304) is configured to convey gas (e.g., inert gas or cleaning gas) upward into one or more of the passages (116, 240) of the substrate holder (100). The upwardly conveyed gas flows into the gap (152) between the substrate (16) and the substrate holder (100). Depending upon the embodiment of the invention, the gas in the gap (152) can then flow either outward and upward around the substrate edge (17), or downward through passages (118, 120, 340) of the substrate holder (100), if any, that do not lead back into the hollow support member (22, 204, 304). The gas that flows outward and upward around the substrate edge (17) inhibits backside deposition of reactant gases above the substrate (16). The gas that flows downward through the passages (118, 120, 340) that do not lead back to the support member (22, 204, 304) advantageously inhibits autodoping by sweeping out-diffused dopant atoms away from the substrate front side (155). In one embodiment, the support member comprises a hollow multi-armed support spider (22) that conveys gas into selected ones of the passages (116). In another embodiment, the support member comprises a bowl- or cup-shaped structure (204) that conveys gas upward into all of the passages (240). In yet another embodiment, the support member comprises a bowl- or cup-shaped structure (304) that conveys gas upward into all but one or more of the passages (240).
Abstract:
A reactor defines a reaction chamber for processing a substrate. The reactor comprises a first inlet for providing a first reactant and to the reaction chamber and a second inlet for a second reactant to the reaction chamber. A first exhaust outlet removes gases from the reaction chamber. A second exhaust outlet removes gases from the reaction chamber. A flow control system is configured to alternately constrict flow through the first and second exhaust outlets. The reactor chamber is configured to for a diffusion barrier within the reaction chamber.
Abstract:
Methods are provided for producing SiGe-on-insulator structures and for forming strain-relaxed SiGe layers on silicon while minimizing defects. Amorphous SiGe layers are deposited by CVD from trisilane and GeH 4 . The amorphous SiGe layers are recrystallized over silicon by melt or solid phase epitaxy (SPE) processes. The melt processes preferably also cause diffusion of germanium to dilute the overall germanium content and essentially consume the silicon overlying the insulator. The SPE process can be conducted with or without diffusion of germanium into the underlying silicon, and so is applicable to SOI as well as conventional semiconductor substrates.
Abstract:
A method for blanket depositing a SiGe film (30) comprises intermixing a silicon source, a germanium source and an etchant to form a gaseous precursor mixture. The method further comprises flowing the gaseous precursor mixture over a substrate (10) under chemical vapor deposition conditions to deposit a blanket layer of epitaxial SiGe (30) onto the substrate (10), whether patterned or un-patterned.
Abstract:
Chemical vapor deposition methods are used to deposit amorphous silicon-containing films over various substrates. Such methods are useful in semiconductor manufacturing to provide a variety of advantages, including uniform deposition over heterogeneous surfaces, high deposition rates, and higher manufacturing productivity. Preferably, the deposited amorphous silicon-containing film is annealed to produce crystalline regions over all or part of an underlying substrate.