Abstract:
A method (300) for forming a Ru layer (560, 560', 561 , 580) for an integrated circuit by providing a patterned substrate (500, 504) in a process chamber (10, 110), and exposing the substrate (25, 125, 500, 504) to a process gas comprising a ruthenium carbonyl precursor and a CO gas to form a Ru layer (560, 560', 561 , 580) over a feature (530, 532, 533) of the patterned substrate (500, 504). In one embodiment, the CO partial pressure in the process chamber (10, 110) is varied during the exposing to control the step coverage of the Ru layer (560, 560', 561 , 580) over the feature (530, 532, 533). In an alternative or further embodiment, the step coverage can be controlled by varying the substrate temperature during the exposure.
Abstract:
A method and system (1 ) for forming a variable thickness seed layer (102, 116) on a substrate (25, 100, 110) for a subsequent metal electrochemical plating process, where the seed layer thickness profile improves uniformity of the electroplated metal layer compared to when using a constant thickness seed layer. The method includes providing a substrate (25, 100, 110) in a process chamber (10) containing a showerhead (30), with the center (106, 122) of the substrate (25, 100, 110) generally aligned with an inner gas delivery zone (32) of the showerhead (30) and the edge (104, 120) of the substrate (25, 100, 110) generally aligned with an outer gas delivery zone (34) of the showerhead (30). The method further includes depositing a seed layer (102, 116) on the substrate (25, 100, 110) by exposing the substrate (25, 100, 110) to a first gas containing a metal-containing precursor flowed through the inner gas delivery zone (32), and exposing the substrate (25, 100, 110) to a second gas flowed through the outer gas delivery zone (34), whereby the seed layer (102, 116) is deposited with a thickness at the edge (104, 120) of the substrate (25, 100, 110) that is less than the thickness at the center (106, 122) of the substrate (25, 100, 110).
Abstract:
Improved measurement accuracy for determining the flow rate of precursor vapor to the deposition tool, particularly for use with low vapor pressure precursors, such as ruthenium carbonyl (Ru 3 (CO) 12 ) or rhenium carbonyl (Re 2 (CO) 10 ). In one embodiment, the system (1, 100) includes a differential pressure manometer provided for measuring the flow rate. A method of measurement and calibration is also provided.
Abstract:
A method and system (100, 200) is described for treating a substrate (105, 205) with a high pressure fluid, such as carbon dioxide in a supercritical state. A process chemistry is introduced to the high pressure fluid for treating the substrate surface. The process chemistry comprises fluorosilicic acid.
Abstract:
A method (300) and a deposition system (1, 100) for increasing deposition rates of metal layers (440, 460) from metal-carbonyl precursors (52, 152) using CO gas and a dilution gas. The method (300) includes providing a substrate (25, 125, 400, 402) in a process chamber (10, 110) of a processing system (1, 100), forming a process gas containing a metal-carbonyl precursor vapor and a CO gas, diluting the process gas in the process chamber (10, 110), and exposing the substrate (25, 125, 400, 402) to the diluted process gas to deposit a metal layer (440, 460) on the substrate (25, 125, 400, 402) by a thermal chemical vapor deposition process. The deposition system (1, 100) contains a substrate holder (20, 120) configured for supporting and heating a substrate (25, 125, 400, 402) in a process chamber (10, 110) having a vapor distribution system (30, 130), a precursor delivery system (105) configured for forming a process gas containing a metal-carbonyl precursor vapor and a CO gas and for introducing the process gas to the vapor distribution system (30, 130), a dilution gas source (37, 137) configured for adding a dilution gas to the process gas in the process chamber (10, 110), and a controller (165) configured for controlling the deposition system (1, 100) during exposure of the substrate (25, 125, 400, 402) to the diluted process gas to deposit a metal layer (440, 460) on the substrate (25, 125, 400, 402) by a thermal chemical vapor deposition process.
Abstract:
An adaptive real time thermal processing system is presented that includes a multivariable controller (260). Generally, the method (1600) includes creating a dynamic model of the thermal processing system (1630); incorporating reticle/mask curvature in the dynamic model; coupling a diffusion-amplification model into the dynamic thermal model; creating a multivariable controller; parameterizing the nominal setpoints into a vector of intelligent setpoints (1650); creating a process sensitivity matrix; creating intelligent setpoints using an efficient optimization method and process data; and establishing recipes that select appropriate models and setpoints during run-time.
Abstract:
A method for low-temperature plasma-enhanced chemical vapor deposition of a silicon-nitrogen-containing film on a substrate (40,125). The method includes providing a substrate (40, 125) in a process chamber (10, 110), exciting a reactant gas in a remote plasma source (94, 205), thereafter mixing the excited reactant gas with a silazane precursor gas, and depositing a silicon-nitrogen-containing film on the substrate (40, 125) from the excited gas mixture in a chemical vapor deposition process. In one embodiment of the invention, the reactant gas can contain a nitrogen-containing gas to deposit a SiCNH film. In another embodiment of the invention, the reactant gas can contain an oxygen-containing gas to deposit a SiCNOH film.
Abstract:
This invention relates to ionized PVD processing of semiconductor wafers and provides conditions for highly uniform deposition-etch process sequence and coverage capabilities of high aspect ratio (HAR) features within a single processing chamber. A plasma is generated and maintained by an inductively coupled plasma (ICP) source (15). A deposition process step is performed in which metal vapor is produced from a target (25) of a PVD source (20). Location and sputter efficiency at the target surface is enhanced by moving a magnet (34) pack to create a traveling or sweeping magnetic field envelope. The target is energized from a DC power supply and pressures effective for an efficient thermalization of the sputtered atoms (30
Abstract:
An iPVD System (200) is programmed to deposit uniform material, such as barrier material (912), into high aspect ratio nano-size features (11) on semiconductor substrates (21) using a process which enhances the sidewall (16) coverage compared to the field (10) and bottom (15) coverage(s) while minimizing or eliminating overhang (14) within a vacuum chamber (30). The iPVD system (200) is operated at low target power and high pressure >50mT to sputter material from the target. RF energy is coupled into the chamber to form a high density plasma. A small RF bias (less than a few volts) can be applied to aid in enhancing the coverage, especially at the bottom.
Abstract:
A method for plasma-enhanced cleaning of a system component (21, 25, 26, 35, 94, 104, 112, 116, 126) in a batch-type processing system and a method for monitoring and controlling the cleaning. The cleaning is performed by introducing a cleaning gas in a process chamber (10, 102) of the batch-type processing system (1, 100), forming a plasma by applying power to a system component (21, 25, 26, 35, 94, 104, 112, 116, 126) within the process chamber (10, 102), exposing a material deposit in the process chamber (10, 102) to the plasma to form a volatile reaction product, and exhausting the reaction product from the processing system (1, 100). Monitoring of the processing system (1, 100) can be carried out to determine cleaning status of the processing system (1, 100) and based upon the status from the monitoring, the processing system (1, 100) is controlled for either continuing the exposing and monitoring or stopping the cleaning process. A batch-type processing system (1, 100) is provided that allows plasma-enhanced cleaning of system components (21, 25, 26, 35, 94, 104, 112, 116, 126), and a system (1, 100) is provided with monitoring and controlling capability.