Abstract:
A method and integrated system (100) are provided for purifying and delivering a metal carbonyl precursor (114) utilized to process a substrate. The method includes providing the metal carbonyl precursor (114) containing un-reacted metal carbonyl precursor and metal-containing impurities in a metal precursor vaporization chamber (110) containing a precursor collection plate (120, 130), evacuating the metal precursor vaporization chamber (110), pressurizing the metal precursor vaporization chamber (110) with a CO-containing gas, vaporizing the un-reacted metal carbonyl precursor, and condensing the vaporized un-reacted metal carbonyl precursor as a purified metal carbonyl precursor (120a, 130a) on the precursor collection plate (120, 130). The method may further include vaporizing the purified metal carbonyl precursor (120a, 130a), and delivering a process gas containing the vapor of the purified metal carbonyi precursor (120a, 130a) by flowing a gas containing CO through the metai precursor vaporization chamber (110) to a deposition system (150) configured to expose a substrate to the process gas.
Abstract:
A system (40) is provided for determining when the buildup of deposits (30) in an exhaust line (20) of a semiconductor wafer processing machine (10) requires cleaning. Deposits in vacuum exhaust lines (20) build up to where they eventually fail structurally, releasing particles that can contaminate equipment and processes. The time at which cleaning is required is often unpredictable, while frequent or early cleaning to avoid waiting too long unnecessarily reduces productivity. The invention provides for the monitoring of thermal properties on the inside of an exhaust line wall. Deposits cause changes in the monitored thermal properties. A heater (42) and thermocouple (43) can be used, for example, and the temperature at the thermocouple that is due to heat flow from the heater is measured. Buildups (30) in the exhaust line affect heat flow to the sensor and are measurable as a decline in sensed temperature. Structural failure of the coating in the exhaust line leads to the eventual leveling off and fluctuation of the temperature measurement. Comparison or correlation of the sensed thermal property or a profile thereof with data stored under known exhaust line conditions is used to determine the condition of the exhaust line and signal when cleaning is most appropriate.
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 containing a process peroxide is introduced to the high pressure fluid for treating the substrate surface. The peroxide-based chemistry is used in conjunction with an initiator, wherein the initiator facilitates the formation of a radical of the process peroxide.
Abstract:
A method of monitoring a thermal processing system (100, 200) in real-time using a built-in self test (BIST) table that includes positioning a plurality of wafers (W) in a processing chamber (202) in the thermal processing system (100, 200); executing a real-time dynamic model (330) to generate a predicted dynamic process response for the processing chamber (202) during the processing time; creating a first measured dynamic process response; determining a dynamic estimation error using a difference between the predicted dynamic process response and the measured dynamic process response; and comparing the dynamic estimation error to operational thresholds established by one or more rules in the BiST table.
Abstract:
During the processing of substrates (105), the substrate surface may be subjected to a cleaning process using supercritical CO 2 . Surface matter may remain, for example, because it is only minimally soluble in the supercritical CO 2 . For example, an oxidation cleaning process causes the substrate structure (105) to cleave at several points leaving smaller fragments of oxidized residue behind. This residue has only minimal solubility in supercritical CO 2 due to the polar constituents resulting from oxidation. The method thus further includes processing the substrate (105) with supercritical CO 2 and a functionalizing agent that can react with the smaller fragments and/or other less soluble components. These functionalized components are rendered more soluble in supercritical CO 2 and are more easily removed than their predecessors.
Abstract:
A method (400) for improving adhesion of Cu to a Ru layer (650a, 650b) in Cu metallization. The method (400) includes providing a substrate (25, 125) in a process chamber (10, 110) of a deposition system (1 , 100), depositing a Ru layer (650a, 650b) on the substrate (25, 125) in a chemical vapor deposition process, and forming a Cu seed layer (660a, 660b) on the Ru layer (650a, 650b) to prevent oxidation of the Ru layer (650a, 650b). The Cu seed layer (660a, 660b) is partially or completely oxidized prior to performing a Cu bulk plating process on the substrate (25, 125). The oxidized portion (660a, 667) of the Cu seed layer (660a, 660b) is substantially dissolved and removed from the substrate (25, 125) during interaction with a Cu plating solution, thereby forming a bulk Cu layer (670a, 670b) with good adhesion to the underlying Ru layer (650a, 650b).
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:
A method (400) for improving adhesion of Cu to a Ru layer (650a, 650b) in Cu metallization. The method (400) includes providing a substrate (25, 125) in a process chamber (10, 110) of a deposition system (1 , 100), depositing a Ru layer (650a, 650b) on the substrate (25, 125) in a chemical vapor deposition process, and forming a Cu seed layer (660a, 660b) on the Ru layer (650a, 650b) to prevent oxidation of the Ru layer (650a, 650b). The Cu seed layer (660a, 660b) is partially or completely oxidized prior to performing a Cu bulk plating process on the substrate (25, 125). The oxidized portion (660a, 667) of the Cu seed layer (660a, 660b) is substantially dissolved and removed from the substrate (25, 125) during interaction with a Cu plating solution, thereby forming a bulk Cu layer (670a, 670b) with good adhesion to the underlying Ru layer (650a, 650b).
Abstract:
A plasma enhanced atomic layer deposition (PEALD) system (101 ) is described, wherein the system comprises a processing space (212) and a high vacuum, ultra-clean transfer space (216). During processing, the substrate to which the thin conformal film is formed is exposed to the processing space. During substrate transfer, the substrate (125) is exposed to the high vacuum space. Processing gases are introduced sequentially and alternately to the process chamber (110) and the pressures and gas flows within, to and from, and between the process chamber (110) and the high vacuum transfer space (216) are controlled to keep the transfer space ultra-clean.
Abstract:
A method (300) and system (1 , 2) for depositing a layer from a vaporized solid precursor. The method includes providing a substrate (25) in a process chamber (10, 11) of a deposition system (1 , 2), forming a precursor vapor by light- induced vaporization of a solid precursor (52), and exposing the substrate (25) to a process gas containing the precursor vapor to deposit a layer including at least one element from the precursor vapor on the substrate (25).