Post thermal treatment methods of forming high dielectric layers over interfacial layers in integrated circuit devices
First Claim
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1. A method for treating a high dielectric layer of a semiconductor device, comprising:
- nitriding a high dielectric layer on a silicon substrate, wherein said high dielectric layer comprises a nano laminate comprising a Group 3 metal oxide layer and a layer selected from the group consisting of a hafnium oxide layer and a zirconium oxide layer and wherein an ozone oxide layer is positioned between said high dielectric layer and said silicon substrate; and
post treating the high dielectric layer, ozone oxide layer, and silicon substrate.
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Abstract
High dielectric layers formed from layers of hafnium oxide, zirconium oxide, aluminum oxide, yttrium oxide, and/or other metal oxides and silicates disposed on silicon substrates or ozone oxide layers over silicon substrates may be nitrided and post thermally treated by oxidation, annealing, or a combination of oxidation and annealing to form high dielectric layers having superior mobility and interfacial characteristics.
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Citations
45 Claims
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1. A method for treating a high dielectric layer of a semiconductor device, comprising:
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nitriding a high dielectric layer on a silicon substrate, wherein said high dielectric layer comprises a nano laminate comprising a Group 3 metal oxide layer and a layer selected from the group consisting of a hafnium oxide layer and a zirconium oxide layer and wherein an ozone oxide layer is positioned between said high dielectric layer and said silicon substrate; and
post treating the high dielectric layer, ozone oxide layer, and silicon substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for treating a high dielectric layer of a semiconductor device, comprising:
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nitriding a silicon substrate and a high dielectric layer formed on an ozone oxide layer over said silicon substrate, said high dielectric layer comprising at least one layer selected from the group consisting of a hafnium oxide layer, a zirconium oxide layer, and a Group 3 metal oxide layer; and
then annealing the silicon substrate, ozone oxide layer, and high dielectric layer. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method for forming a high dielectric layer of a semiconductor device, comprising:
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forming an ozone oxide layer over a silicon substrate;
forming a high dielectric layer on said ozone oxide layer, wherein said high dielectric layer comprises at least one layer selected from the group consisting of a hafnium oxide layer, a zirconium oxide layer, and a Group 3 metal oxide layer;
nitriding said silicon substrate and said high dielectric layer on said silicon substrate; and
then oxidizing the silicon substrate and high dielectric layer. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A method for forming a high dielectric layer of a semiconductor device, comprising:
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forming an ozone oxide layer over a silicon substrate;
forming a high dielectric layer on said ozone oxide layer, wherein said high dielectric layer comprises at least one layer selected from the group consisting of a hafnium oxide layer, a zirconium oxide layer, and a Group 3 metal oxide layer;
nitriding a silicon substrate and a high dielectric layer on said silicon substrate;
then oxidizing the silicon substrate and high dielectric layer; and
annealing the nitrided and oxidized silicon substrate and high dielectric layer. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A method for treating a high dielectric layer of an integrated circuit device, comprising nitriding to provide a nitride profile concentration in the high dielectric layer that is greater adjacent to the polysilicon/high dielectric layer interface than adjacent to a silicon/ozone oxide/high dielectric layer interface.
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