METAL SURFACE TREATMENTS FOR UNIFORMLY GROWING DIELECTRIC LAYERS
First Claim
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1. A fabrication process for a MIM capacitor, comprising:
- providing a substrate;
depositing a first metal layer on a dielectric layer of the substrate;
forming an interfacial layer on the first metal layer, wherein the interfacial layer has a hydroxyl terminated surface;
depositing a capacitor dielectric layer on the interfacial layer using an ALD process; and
depositing a second metal layer on the capacitor dielectric layer.
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Abstract
A fabrication process for a MIM capacitor comprises providing a substrate, depositing a first metal layer on a dielectric layer of the substrate, forming an interfacial layer on the first metal layer, wherein the interfacial layer has a hydroxyl terminated surface, depositing a capacitor dielectric layer on the interfacial layer using an ALD process, and depositing a second metal layer on the capacitor dielectric layer. The interfacial layer may be formed by depositing a thin layer of a metal oxide, by oxidizing a surface of the first metal layer with an oxygen plasma, or by evaporating a thin metal oxide onto the surface of the first metal layer.
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16 Claims
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1. A fabrication process for a MIM capacitor, comprising:
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providing a substrate; depositing a first metal layer on a dielectric layer of the substrate; forming an interfacial layer on the first metal layer, wherein the interfacial layer has a hydroxyl terminated surface; depositing a capacitor dielectric layer on the interfacial layer using an ALD process; and depositing a second metal layer on the capacitor dielectric layer. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A MIM capacitor comprising:
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a semiconductor substrate; a first metal layer on the semiconductor substrate; an interfacial layer on the first metal layer, wherein the interfacial layer has a hydroxyl terminated surface; a capacitor dielectric layer on the hydroxyl terminated surface of the interfacial layer; and a first metal layer on the capacitor dielectric layer. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification