摘要:
The nucleation delay in the formation of a tungsten layer on a substrate is reduced or eliminated by alternative processes. In one process the substrate is exposed to atomic hydrogen before the tungsten nucleation layer is formed. In the other process the substrate is exposed to a boron hydride such as diborane (B2H6) before the nucleation layer is formed. The process works effectively to reduce or eliminate the tungsten nucleation delay on a variety of surfaces, including silicon, silicon dioxide, silicon nitride and titanium nitride.
摘要翻译:通过替代方法减少或消除了在基底上形成钨层的成核延迟。 在一个过程中,在形成钨成核层之前,将衬底暴露于原子氢。 在另一方法中,在形成成核层之前,将基底暴露于硼氢化物如乙硼烷(B 2 H 6 H 6)。 该工艺有效地减少或消除了各种表面上的钨成核延迟,包括硅,二氧化硅,氮化硅和氮化钛。
摘要:
Carbon monoxide gas is provided in a ruthenium-deposition apparatus to clean undesired ruthenium-containing deposits from apparatus surfaces. Carbon monoxide gas is mixed with reactant gases in apparatus tubing and in a ruthenium-deposition reaction chamber to inhibit formation of undesired ruthenium deposits on apparatus surfaces and to remove ruthenium deposits.
摘要:
Methods for depositing a tungsten nitride layer are described. The methods form a tungsten nitride layer using a carefully controlled deposition technique such as pulsed nucleation layer (PNL). Initially, a tungsten layer is formed on a substrate surface. The tungsten layer is then exposed to a nitriding agent to form a tungsten nitride layer. Methods of forming relatively thick layers of involve repeated cycles of contact with reducing agent, tungsten precursor and nitriding agent. In some cases, the cycle may also include contact with a dopant precursor such as phosphine or arsine.
摘要:
Methods for depositing a tungsten nitride layer are described. The methods form a tungsten nitride layer using a carefully controlled deposition technique such as pulsed nucleation layer (PNL). Initially, a tungsten layer is formed on a substrate surface. The tungsten layer is then exposed to a nitriding agent to form a tungsten nitride layer. Methods of forming relatively thick layers of involve repeated cycles of contact with reducing agent, tungsten precursor and nitriding agent. In some cases, the cycle may also include contact with a dopant precursor such as phosphine or arsine.
摘要:
Methods and apparatus for preparing a low-resistivity tungsten film on a substrate are provided. Methods involve the formation of a tungsten nucleation layer on a substrate using pulsed nucleation layer (PNL) techniques and depositing a bulk tungsten layer thereon. Methods for forming the tungsten nucleation layer involve the use of a boron-containing species, a tungsten-containing precursor, and optionally, a silane. The methods described are particularly useful for applications where thin, low resistivity films are desired, such as interconnect applications.
摘要:
A tungsten nucleation film is formed on a surface of a semiconductor substrate by alternatively providing to that surface, reducing gases and tungsten-containing gases. Each cycle of the method provides for one or more monolayers of the tungsten film. The film is conformal and has improved step coverage, even for a high aspect ratio contact hole.
摘要:
Carbon monoxide gas is provided in a ruthenium-deposition apparatus to clean undesired ruthenium-containing deposits from apparatus surfaces. Carbon monoxide gas is mixed with reactant gases in apparatus tubing and in a ruthenium-deposition reaction chamber to inhibit formation of undesired ruthenium deposits on apparatus surfaces and to remove ruthenium deposits.
摘要:
Methods for depositing a tungsten nitride layer are described. The methods form a tungsten nitride layer using a carefully controlled deposition technique such as pulsed nucleation layer (PNL). Initially, a tungsten layer is formed on a substrate surface. The tungsten layer is then exposed to a nitriding agent to form a tungsten nitride layer. Methods of forming relatively thick layers of involve repeated cycles of contact with reducing agent, tungsten precursor and nitriding agent. In some cases, the cycle may also include contact with a dopant precursor such as phosphine or arsine.
摘要:
A tungsten nucleation film is formed on a surface of a semiconductor substrate by alternatively providing to that surface, reducing gases and tungsten-containing gases. Each cycle of the method provides for one or more monolayers of the tungsten film. The film is conformal and has improved step coverage, even for a high aspect ratio contact hole.