Methods for forming a semiconductor device structure and related semiconductor device structures
First Claim
1. A method for forming a semiconductor device structure, the method comprising:
- forming a molybdenum nitride film on a substrate by atomic layer deposition, wherein forming the molybdenum nitride film comprises;
contacting the substrate with a first vapor phase reactant comprising a binary molybdenum halide precursor;
after contacting the substrate with the first vapor phase reactant, contacting the substrate with a second vapor phase reactant comprising a nitrogen precursor selected from the group comprising ammonia (NH3), hydrazine (N2H4), triazane (N3H5), tertbutylhydrazine (C4H9N2H3), methylhydrazine (CH3NHNH2), and dimethylhydrazine ((CH3)2N2H2); and
at the same time as or after contacting the substrate with the second vapor phase reactant, contacting the substrate with a third vapor phase reactant comprising a reducing precursor selected from the group comprising hydrogen gas (H2), silane (SiH4), disilane (Si2H6), trisilane (Si3H8), tetrasilane (Si4H8), and acetylene (C2H2); and
forming a gate electrode structure comprising the molybdenum nitride film, the gate electrode structure having an effective work function greater than approximately 5.0 eV.
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Abstract
Methods for forming a semiconductor device structure are provided. The methods may include forming a molybdenum nitride film on a substrate by atomic layer deposition by contacting the substrate with a first vapor phase reactant comprising a molybdenum halide precursor, contacting the substrate with a second vapor phase reactant comprise a nitrogen precursor, and contacting the substrate with a third vapor phase reactant comprising a reducing precursor. The methods provided may also include forming a gate electrode structure comprising the molybdenum nitride film, the gate electrode structure having an effective work function greater than approximately 5.0 eV. Semiconductor device structures including molybdenum nitride films are also provided.
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Citations
20 Claims
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1. A method for forming a semiconductor device structure, the method comprising:
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forming a molybdenum nitride film on a substrate by atomic layer deposition, wherein forming the molybdenum nitride film comprises; contacting the substrate with a first vapor phase reactant comprising a binary molybdenum halide precursor; after contacting the substrate with the first vapor phase reactant, contacting the substrate with a second vapor phase reactant comprising a nitrogen precursor selected from the group comprising ammonia (NH3), hydrazine (N2H4), triazane (N3H5), tertbutylhydrazine (C4H9N2H3), methylhydrazine (CH3NHNH2), and dimethylhydrazine ((CH3)2N2H2); and at the same time as or after contacting the substrate with the second vapor phase reactant, contacting the substrate with a third vapor phase reactant comprising a reducing precursor selected from the group comprising hydrogen gas (H2), silane (SiH4), disilane (Si2H6), trisilane (Si3H8), tetrasilane (Si4H8), and acetylene (C2H2); and forming a gate electrode structure comprising the molybdenum nitride film, the gate electrode structure having an effective work function greater than approximately 5.0 eV. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A semiconductor device structure comprising:
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a PMOS transistor gate structure, comprising; a molybdenum nitride film comprising between 30 atomic % and 60 atomic % molybdenum; a semiconductor body; and a gate dielectric disposed between the molybdenum nitride film and the semiconductor body, wherein the PMOS gate structure has an effective work function greater than 5.0 eV. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method for forming a semiconductor device structure, the method comprising:
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forming a molybdenum nitride film on a substrate by atomic layer deposition, wherein forming the molybdenum nitride film comprises; contacting the substrate with a first vapor phase reactant comprising a molybdenum halide precursor selected from the group comprising molybdenum trichloride (MoCl3), molybdenum tetrachloride (MoCl4), molybdenum hexachloride (MoCl6), molybdenum hexafluoride (MoF6), and tetrachloro(cyclopentadienyl)molybdenum, the first vapor phase reactant being free of Nitrogen (N); after contacting the substrate with the first vapor phase reactant, contacting the substrate with a second vapor phase reactant comprising a nitrogen precursor selected from the group comprising hydrazine (N2H4), triazane (N3H5), tertbutylhydrazine (C4H9N2H3), methylhydrazine (CH3NHNH2), and dimethylhydrazine ((CH3)2N2H2); and contacting the substrate with a third vapor phase reactant comprising a reducing precursor selected from the group comprising hydrogen gas (H2), silane (SiH4), disilane (Si2H6), trisilane (Si3H8), tetrasilane (Si4H8), and acetylene (C2H2); and forming a gate electrode structure comprising the molybdenum nitride film, the gate electrode structure having an effective work function greater than approximately 5.0 eV. - View Dependent Claims (20)
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Specification