摘要:
A layer of material is formed on a substrate in a partially formed integrated circuit on a wafer. The substrate undergoes a plasma annealing, during which the substrate is bombarded with ions. The plasma annealing may be performed by exposing the substrate to plasma that is generated from a nitrogen containing gas which is infused with energy. After the substrate is plasma annealed, a layer of a refractory metal nitride is deposited on the substrate. The layer of refractory metal nitride is then bombarded with a first set of ions. The bombardment of the refractory metal by the first set of ions may be achieved by performing a plasma annealing. The refractory metal nitride may be further bombarded by a second set of ions.
摘要:
A method for improving the characteristics of deposited thin films by improved control and stabilization of wafer surface temperatures. Further, the invention provides the ability to rapidly change the temperature of the wafer surface without the need to change the temperature of the chamber. The wafer is heated to an operating temperature by conventional means. A gas with high thermal conductivity, such as helium or hydrogen, is passed over the wafer to cool its surface to a desired temperature for the process to be performed. The flow rate is then adjusted to stabilize the temperature of the wafer and reduce surface temperature variations. Processing gases are then introduced into the chamber, and deposition onto the wafer commences. The maintenance of correct wafer surface temperature results in improved step coverage and conformality of the deposited film. Post-deposition steps such as plasma annealing may be performed using a gas compatible with the process at a flow rate which results in a temperature desirable for the post-deposition process.
摘要:
The construction of a film on a wafer, which is placed in a processing chamber, may be carried out through the following steps. A layer (film) of tantalum nitride material is deposited on the wafer. Next, the layer of tantalum nitride material is annealed. The deposition and annealing may both be accomplished in the same chamber, without need for removing the wafer from the chamber until both steps are completed.
摘要:
A layer of tungsten nitride is deposited on the upper surface of a wafer. The deposition is performed by providing a gaseous mixture and providing energy to the gaseous mixture to form a plasma. The gaseous mixture includes a first gaseous composition containing tungsten and a second gaseous composition containing nitrogen and hydrogen. The second gaseous composition is one that does not have a gas phase reaction with the first gaseous composition to form tungsten nitride, unless energy is provided to the gaseous mixture. The first gaseous composition may be tungsten hexafluoride (WF6). The gaseous mixture may be infused with energy to form a plasma by providing it with energy from an rf signal. In the plasma, the nitrogen dissociates into nitrogen ions, and the tungsten separates from the fluorine. The nitrogen ions and tungsten then combine to form tungsten nitride (W2N), which deposits on the wafer's upper surface.
摘要:
Vacuum CVD chambers are disclosed which provide a more uniformly deposited thin film on a substrate. The chamber susceptor mount for the substrate is heated resistively with a single coil firmly contacting the metal of the susceptor on all sides, providing uniform temperatures across the susceptor mount for a substrate. A purge gas line is connected to openings in the susceptor outside of the periphery of the substrate to prevent edge and backside contamination of the substrate. A vacuum feed line mounts the substrate to the susceptor plate during processing. A refractory purge guide, or a plurality of placement pins, maintain a fixed gap passage for the purge gases to pass alongside the edge of the wafer and into the processing area of the chamber. An exhaust pumping plate improves the uniformity of exhaustion of spent gases from the chamber.
摘要:
A clamping ring having a downwardly extending finger that mates with a pocket in the periphery of a susceptor for supporting a wafer in a chemical vapor deposition chamber, provides alignment of the clamping ring, the wafer and the susceptor. A source of inert gas connected to the pocket provides a positive pressure in the pocket that prevents reactive gas in the chamber from reaching the edge and backside of the wafer. A source of vacuum connected to the susceptor support surface ensures good contact between the wafer and the susceptor.The clamping ring also has a lip extending over the top surface of the wafer having a rear surface that has a negative angle with respect to the upper surface of the clamping ring, providing a knife edge seal to the wafer, reducing the area of contact between the clamping ring and the wafer and providing a reduced area of thermal contact between the clamping ring and the wafer.
摘要:
Vacuum CVD chambers are disclosed which provide a more uniformly deposited thin film on a substrate. The chamber susceptor mount for the substrate is heated resistively with a single coil firmly contacting the metal of the susceptor on all sides, providing uniform temperatures across the susceptor mount for a substrate. A purge gas line is connected to openings in the susceptor outside of the periphery of the substrate to prevent edge and backside contamination of the substrate. A vacuum feed line mounts the substrate to the susceptor plate during processing. A refractory purge guide, or a plurality of placement pins, maintain a fixed gap passage for the purge gases to pass alongside the edge of the wafer and into the processing area of the chamber. An exhaust pumping plate improves the uniformity of exhaustion of spent gases from the chamber.
摘要:
The construction of a film on a wafer, which is placed in a processing chamber, may be carried out through the following steps. A layer of material is deposited on the wafer. Next, the layer of material is annealed. Once the annealing is completed, the material may be oxidized. Alternatively, the material may be exposed to a silicon gas once the annealing is completed. The deposition, annealing, and either oxidation or silicon gas exposure may all be carried out in the same chamber, without need for removing the wafer from the chamber until all three steps are completed. A semiconductor wafer processing chamber for carrying out such an in-situ construction may include a processing chamber, a showerhead, a wafer support and a rf signal means. The showerhead supplies gases into the processing chamber, while the wafer support supports a wafer in the processing chamber. The rf signal means is coupled to the showerhead and the wafer support for providing a first rf signal to the showerhead and a second rf signal to the wafer support.
摘要:
The construction of a film on a wafer, which is placed in a processing chamber, may be carried out through the following steps. A layer of material is formed on the wafer, while the wafer is in the processing chamber. Next, the layer of material is oxidized, while the wafer is in the processing chamber. A semiconductor wafer processing chamber for carrying out such a construction in-situ may include a processing chamber, a showerhead, a wafer support and a rf signal means. The showerhead supplies gases into the processing chamber, while the wafer support supports a wafer in the processing chamber. The rf signal means is coupled to the showerhead and the wafer support for providing a first rf signal to the showerhead and a second rf signal to the wafer support.
摘要:
Embodiments described herein are directed to an apparatus for generating a precursor for a semiconductor processing system. In one embodiment, an apparatus for generating a precursor gas during a vapor deposition process is described. The apparatus includes a canister containing an interior volume between a lid and a bottom, a gaseous inlet and a gaseous outlet disposed on the lid, a plurality of silos coupled to the bottom and extending from a lower region to an upper region of the interior volume, and a tantalum precursor having a chlorine concentration of about 5 ppm or less contained within the lower region of the canister.