Neutral atom beam nitridation for copper interconnect
First Claim
1. A method of forming an interconnect comprising:
- forming an opening in a dielectric layer;
treating a dielectric surface of the opening in the dielectric layer with a nitridation treatment including a beam of nitrogen containing species to convert the dielectric surface to a nitrided surface;
depositing a tantalum containing layer on the nitrided surface; and
depositing metal fill material on the tantalum containing layer.
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Abstract
A method of forming an interconnect that in one embodiment includes forming an opening in a dielectric layer, and treating a dielectric surface of the opening in the dielectric layer with a nitridation treatment to convert the dielectric surface to a nitrided surface. The method may further include depositing a tantalum containing layer on the nitrided surface. In some embodiments, the method further includes depositing a metal fill material on the tantalum containing layer. The interconnect formed may include a nitrided dielectric surface, a tantalum and nitrogen alloyed interface that is present on the nitrided dielectric surface, a tantalum layer on the tantalum and nitrogen alloy interface, and a copper fill.
17 Citations
19 Claims
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1. A method of forming an interconnect comprising:
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forming an opening in a dielectric layer; treating a dielectric surface of the opening in the dielectric layer with a nitridation treatment including a beam of nitrogen containing species to convert the dielectric surface to a nitrided surface; depositing a tantalum containing layer on the nitrided surface; and depositing metal fill material on the tantalum containing layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of forming an interconnect comprising:
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forming an opening in a dielectric layer; treating a dielectric surface of the opening in the dielectric layer with a beam of nitrogen containing species to convert the dielectric surface to a nitrided surface; depositing a tantalum containing layer on the nitrided surface; and depositing metal fill material on the tantalum containing layer, wherein the interconnect comprises a nitrided dielectric surface, a tantalum and nitrogen alloy layer that is present on the nitrided dielectric surface, a tantalum layer on the tantalum and nitrogen alloy layer surface, and a copper fill.
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17. An interconnect comprising:
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an opening through a dielectric layer including silicon (Si) and carbon (C); a nitrided dielectric surface provided by a beam of nitrogen containing species applied to the dielectric layer, wherein the dielectric layer adjacent to the nitrided dielectric surface is completely free of bond damage; a tantalum and nitrogen alloy layer that is present on the nitrided dielectric surface; a tantalum layer on the tantalum and nitrogen alloy layer surface; and a metal fill. - View Dependent Claims (18, 19)
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Specification