摘要:
In one embodiment, a method for forming a titanium nitride barrier material on a substrate is provided which includes depositing a titanium nitride layer on the substrate by a metal-organic chemical vapor deposition (MOCVD) process, and thereafter, densifying the titanium nitride layer by exposing the substrate to a plasma process. In one example, the MOCVD process and the densifying plasma process is repeated to form a barrier stack by depositing a second titanium nitride layer on the first titanium nitride layer. In another example, a third titanium nitride layer is deposited on the second titanium nitride layer. Subsequently, the method provides depositing a conductive material on the substrate and exposing the substrate to a annealing process. In one example, each titanium nitride layer may have a thickness of about 15 Å and the titanium nitride barrier stack may have a copper diffusion potential of less than about 5×1010 atoms/cm2.
摘要:
A method for removing oxides from the bottom surface of a contact hole is provided. The method provides efficient cleaning of the bottom surface without distortion of the contact hole upper and sidewall surfaces.
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.
摘要:
A system for processing a substrate is provided which includes at least one atomic layer deposition (ALD) chamber for depositing a barrier layer containing tantalum and at least one physical vapor deposition (PVD) metal seed chamber for depositing a metal seed layer on the barrier layer. The at least one ALD chamber may be in fluid communication with a first precursor source providing a tantalum-containing compound and a second precursor source. In one example, the tantalum-containing compound is an organometallic tantalum precursor, such as PDMAT. In another example, the second precursor source contains a nitrogen precursor, such as ammonia. The PDMAT may have a chlorine concentration of about 100 ppm or less, preferably, about 30 ppm or less, and more preferably, about 5 ppm or less. In some examples, the PVD metal seed chamber is used to deposit a copper-containing metal seed layer.
摘要:
Embodiments of the invention described herein generally provide methods for forming cobalt silicide layers and metallic cobalt layers by using various deposition processes and annealing processes. In one embodiment, a method for forming a metallic silicide containing material on a substrate is provided which includes forming a metallic silicide material over a silicon-containing surface during a vapor deposition process by sequentially depositing a plurality of metallic silicide layers and silyl layers on the substrate, depositing a metallic capping layer over the metallic silicide material, heating the substrate during an annealing process, and depositing a metallic contact material over the barrier material. In one example, the metallic silicide layers and the metallic capping layer both contain cobalt. The cobalt silicide material may contain a silicon/cobalt atomic ratio of about 1.9 or greater, such as greater than about 2.0, or about 2.2 or greater.
摘要:
In one embodiment, an apparatus for performing an atomic layer deposition (ALD) process is provided which includes a chamber body containing a substrate support, a lid assembly attached to the chamber body, a remote plasma system (RPS) in fluid communication with the reaction zone, a centralized expanding conduit extending through the lid assembly and expanding radially outwards, a first gas delivery sub-assembly configured to deliver a first process gas, and a second gas delivery sub-assembly configured to deliver a second process gas into the centralized expanding conduit. The first gas delivery sub-assembly contains an annular channel encircling and in fluid communication with the centralized expanding conduit, wherein the annular channel is adapted to deliver the first process gas through a plurality of passageways and nozzles and into the centralized expanding conduit. The second gas delivery sub-assembly contains a gas inlet in fluid communication to the centralized expanding conduit.
摘要:
A precursor and method for filling a feature in a substrate. The method generally includes depositing a barrier layer, the barrier layer being formed from pentakis(dimethylamido)tantalum having less than about 5 ppm of impurities. The method additionally may include depositing a seed layer over the barrier layer and depositing a conductive layer over the seed layer. The precursor generally includes pentakis(dimethylamido)tantalum having less than about 5 ppm of impurities. The precursor is generated in a canister coupled to a heating element configured to reduce formation of impurities.
摘要:
Embodiments of the present invention are directed to an apparatus for generating a precursor for a semiconductor processing system (320). The apparatus includes a canister (300) having a sidewall (402), a top portion and a bottom portion. The canister (300) defines an interior volume (438) having an upper region (418) and a lower region (434). In one embodiment, the apparatus further includes a heater (430) partially surrounding the canister (300). The heater (430) creates a temperature gradient between the upper region (418) and the lower region (434). Also claimed is a method of forming a barrier layer from purified pentakis(dimethylamido)tantalum, for example a tantalum nitride barrier layer by atomic layer deposition.
摘要:
In one embodiment, a method for depositing a tungsten-containing film on a substrate is provided which includes depositing a barrier layer on the substrate, such as a titanium or tantalum containing barrier layer and depositing a ruthenium layer on the barrier layer. The method further includes depositing a tungsten nucleation layer on the ruthenium layer and depositing a tungsten bulk layer on the tungsten nucleation layer. The barrier layer, the ruthenium layer, the tungsten nucleation layer and the tungsten bulk layer are independently deposited by an ALD process, a CVD process or a PVD process, preferably by an ALD process. In some examples, the substrate is exposed to a soak process prior to depositing a subsequent layer, such as between the deposition of the barrier layer and the ruthenium layer, the ruthenium layer and the tungsten nucleation layer or the tungsten nucleation layer and the tungsten bulk layer.
摘要:
Embodiments of the present invention provide a process sequence and related hardware for filling a patterned feature on a substrate with a metal, such as copper. The sequence comprises first forming a reliable barrier layer in the patterned feature to prevent diffusion of the metal into the dielectric layer through which the patterned feature is formed. One sequence comprises forming a generally conformal barrier layer over a patterned dielectric, etching the barrier layer at the bottom of the patterned feature, depositing a second barrier layer, and then filling the patterned feature with a metal, such as copper.