Semiconductor device and manufacturing method of the same
First Claim
1. A semiconductor device comprising:
- a first semiconductor layer of a first conductivity type;
a first gate insulating film formed on the first semiconductor layer;
a first gate electrode formed on the first gate insulating film, the first gate electrode comprising;
crystal grains of a first metal consisting of Ru; and
a second metal selected from the group consisting of W, Ni, Mo, Rh, Pd, Re Ir, and Pt, the second metal segregated at a grain boundary between the crystal grains of the first metal; and
first source/drain regions formed in the first semiconductor layer, across the first gate insulating film from each other in a gate length direction of the first gate insulating film.
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Abstract
A semiconductor device includes a first semiconductor layer of a first conductivity type, a first gate insulating film, a first gate electrode and first source/drain regions. The first gate insulating film is formed on the first semiconductor layer. The first gate electrode is formed on the first gate insulating film. The first gate electrode includes crystal grains of a first metal consisting of Ru, and a second metal selected from the group consisting of W, Ni, Mo, Rh, Pd, Re Ir, and Pt. The second metal is segregated at a grain boundary between the crystal grains of the first metal. The first source/drain regions are formed in the first semiconductor layer, across the first gate insulating film from each other in a gate length direction of the first gate insulating film.
40 Citations
18 Claims
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1. A semiconductor device comprising:
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a first semiconductor layer of a first conductivity type;
a first gate insulating film formed on the first semiconductor layer;
a first gate electrode formed on the first gate insulating film, the first gate electrode comprising;
crystal grains of a first metal consisting of Ru; and
a second metal selected from the group consisting of W, Ni, Mo, Rh, Pd, Re Ir, and Pt, the second metal segregated at a grain boundary between the crystal grains of the first metal; and
first source/drain regions formed in the first semiconductor layer, across the first gate insulating film from each other in a gate length direction of the first gate insulating film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A semiconductor device comprising:
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a first semiconductor layer of a first conductivity type;
a first gate insulating film formed on the first semiconductor layer;
a first gate electrode formed on the first gate insulating film, the first gate electrode comprising;
crystal grains of a first metal consisting of Pt; and
a second metal selected from the group consisting of W, Re, Rh, Pd, Ir, and Ru, the second metal segregated at a grain boundary between the crystal grains of the first metal; and
first source/drain regions formed in the first semiconductor layer, across the first gate insulating film from each other in a gate length direction of the first gate insulating film.
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12. A semiconductor device comprising:
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a first semiconductor layer of a first conductivity type;
a first gate insulating film formed on the first semiconductor layer;
a first gate electrode formed on the first gate insulating film, the first gate electrode comprising;
crystal grains of a first metal consisting of Ir; and
a second metal selected from the group consisting of Re, Rh, Ni, Pd, Pt and Ru, the second metal segregated at a grain boundary between the crystal grains of the first metal; and
first source/drain regions formed in the first semiconductor layer, across the first gate insulating film from each other in a gate length direction of the first gate insulating film.
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13. A semiconductor device comprising:
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a first semiconductor layer of a first conductivity type;
a first gate insulating film formed on the first semiconductor layer;
a first gate electrode formed on the first gate insulating film, the first gate electrode comprising;
crystal grains of a first metal consisting of Re; and
a second metal selected from the group consisting of Rh, Ni, Pd, Ir, Pt and Ru, the second metal segregated at a grain boundary between the crystal grains of the first metal; and
first source/drain regions formed in the first semiconductor layer, across the first gate insulating film from each other in a gate length direction of the first gate insulating film.
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14. A method for manufacturing a semiconductor device, the method comprising:
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forming a first gate insulating film on a first semiconductor layer of a first conductivity type;
forming, on the first gate insulating film, a first gate electrode comprising;
a layer comprising crystal grains of a first metal consisting of Ru; and
a layer comprising a second metal selected from the group consisting of W, Ni, Mo, Rh, Pd, Re, Ir, and Pt;
segregating the second metal at a grain boundary between the crystal grains of the first metal; and
forming first source/drain regions in the first semiconductor layer, across the first gate insulating film from each other in a gate length direction of the first gate insulating film. - View Dependent Claims (15, 16, 17, 18)
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Specification