SEMICONDUCTOR DEVICE AND FABRICATING METHOD THEREOF
First Claim
1. A method of fabricating semiconductor device comprising:
- forming a dummy gate structure with a dummy gate electrode and source/drain regions adjacent to the dummy gate structure over a substrate;
depositing an etch stop layer over the source/drain regions;
depositing a protective layer over the etch stop layer;
depositing an interlayer dielectric layer over the etch stop layer;
annealing the interlayer dielectric layer;
forming a metal gate structure by replacing part of the dummy gate structure;
depositing an isolation layer over the metal gate structure;
forming a contact opening through the interlayer dielectric layer to expose the source/drain regions; and
forming a contact plug in the contact opening and on the metal gate structure.
1 Assignment
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Accused Products
Abstract
A semiconductor device and a method of fabricating the semiconductor device are provided. The semiconductor device includes a substrate, a gate structure over the substrate, a source/drain regions adjacent to the pair of spacers in the substrate, an etch stop layer next to the gate structure and overlying the substrate, a contact plug extending into the source/drain region and partially overlapping the gate structure, a protective layer over the etch stop layer overlying the substrate and covering the etch stop layer next to the gate structure without the contact plug, and an interlayer dielectric layer over the protective layer. The contact plug has no contact-to-gate short issue to the gate structure.
2 Citations
20 Claims
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1. A method of fabricating semiconductor device comprising:
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forming a dummy gate structure with a dummy gate electrode and source/drain regions adjacent to the dummy gate structure over a substrate; depositing an etch stop layer over the source/drain regions; depositing a protective layer over the etch stop layer; depositing an interlayer dielectric layer over the etch stop layer; annealing the interlayer dielectric layer; forming a metal gate structure by replacing part of the dummy gate structure; depositing an isolation layer over the metal gate structure; forming a contact opening through the interlayer dielectric layer to expose the source/drain regions; and forming a contact plug in the contact opening and on the metal gate structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of fabricating semiconductor device comprising:
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forming a dummy gate structure with a dummy gate electrode and source/drain. ns adjacent to the dummy gate structure over a substrate; depositing an etch stop layer over the dummy gate structure and the source/drain regions; depositing a protective layer over the etch stop layer overlying the source/drain regions; depositing an interlayer dielectric layer over the protective layer; annealing the interlayer dielectric layer; polishing the etch stop layer to expose the dummy gate structure; forming a metal gate electrode by replacing part of the dummy gate structure; depositing an isolation layer over the metal gate electrode; forming a contact opening through the interlayer dielectric layer to expose the source/drain regions; and forming a contact plug in the contact opening and on the isolation layer. - View Dependent Claims (11, 12, 13, 14)
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15. A semiconductor device, comprising:
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a substrate; a gate structure over the substrate comprising; a gate dielectric layer over the substrate; a gate electrode over the gate dielectric layer; an isolation layer over the gate electrode; and a spacer next to each of the two sides of the gate electrode; source/drain regions adjacent to the pair of spacers in the substrate; an etch stop layer next to the pair of spacers and overlying the substrate; a contact plug extending into the source/drain region and partially overlapping the isolation layer; a protective layer over the etch stop layer overlying the substrate; and an interlayer dielectric layer over the protective layer. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification