Method of cutting metal gate
First Claim
Patent Images
1. A method comprising:
- forming a first fin and a second fin on a substrate, the first fin having a first gate region and the second fin having a second gate region;
forming a metal-gate line over the first and second gate regions, wherein the metal-gate line extends from the first fin to the second fin;
applying a line-cut to separate the metal-gate line into a first sub-metal gate line and a second sub-metal gate line; and
forming an isolation region within the line cut.
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Abstract
A method for fabricating a semiconductor device includes forming a first fin and a second fin on a substrate. The first fin has a first gate region and the second fin has a second gate region. The method also includes forming a metal-gate line over the first and second gate regions. The metal-gate line extends from the first fin to the second fin. The method also includes applying a line-cut to separate the metal-gate line into a first sub-metal gate line and a second sub-metal gate line and forming an isolation region within the line cut.
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Citations
20 Claims
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1. A method comprising:
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forming a first fin and a second fin on a substrate, the first fin having a first gate region and the second fin having a second gate region; forming a metal-gate line over the first and second gate regions, wherein the metal-gate line extends from the first fin to the second fin; applying a line-cut to separate the metal-gate line into a first sub-metal gate line and a second sub-metal gate line; and forming an isolation region within the line cut. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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forming a plurality of metal gate stacks over a substrate such that the plurality of gate stacks connect to each other to form a metal-gate line, wherein the plurality of metal gate stacks have sidewall spacers disposed along sidewalls of the metal gate stacks; forming source/drain features in the substrate adjacent the metal gate stacks; forming an interlayer dielectric (ILD) layer over the metal gate stacks and the source/drain features; recessing the plurality of metal gate stacks and the sidewall spacers; forming a hard mask over the recessed plurality of metal gate stacks and the recessed sidewall pacers; removing a portion of the ILD layer to expose the source/drain features while the hard mask protects the recessed metal gate stacks and the recessed sidewall spacers; forming a contact metal layer over the exposed source/drain features; forming a line-cut to cut the metal-gate line into sub-metal-gate lines; and forming an isolation region within the line cut. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method comprising:
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forming a plurality of fins on a substrate, each of the fins having a gate region; forming dummy gate stack in each gate region; forming sidewall spacers along sidewalls of each dummy gate stack; forming an interlayer dielectric (ILD) layer over the substrate, including beside the dummy gate stacks; removing the dummy gate stacks to expose portions of the fins in the gate region; forming metal gate stacks over the exposed portions of the fins, wherein the metal gate stack form a metal-gate line; recessing the metal gate stacks; forming a hard mask over the recessed metal gate stacks; forming a line-cut to cut the metal-gate line into sub-metal-gate lines while the hard mask protects the metal gate stacks; and forming an isolation region within the line cut. - View Dependent Claims (17, 18, 19, 20)
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Specification