Semiconductor device and method for fabricating the same
First Claim
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1. A semiconductor device, comprising:
- a substrate;
a gate structure disposed on the substrate, wherein the gate structure comprises a high-k dielectric layer;
a first seal layer disposed on a sidewall of the gate structure, wherein the first seal layer is an oxygen-free seal layer and is non-L-shaped; and
a second seal layer disposed on a sidewall of the first seal layer, wherein the second seal layer is an L-shaped seal layer.
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Abstract
A semiconductor device is disclosed. The semiconductor device includes: a substrate; a gate structure disposed on the substrate, wherein the gate structure has a high-k dielectric layer; a first seal layer disposed on a sidewall of the gate structure, wherein the first seal layer is an oxygen-free seal layer and is non-L-shaped; and a second seal layer disposed on a sidewall of the first seal layer, wherein the second seal layer is an L-shaped seal layer.
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Citations
17 Claims
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1. A semiconductor device, comprising:
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a substrate; a gate structure disposed on the substrate, wherein the gate structure comprises a high-k dielectric layer; a first seal layer disposed on a sidewall of the gate structure, wherein the first seal layer is an oxygen-free seal layer and is non-L-shaped; and a second seal layer disposed on a sidewall of the first seal layer, wherein the second seal layer is an L-shaped seal layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for fabricating semiconductor device, comprising:
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providing a substrate; forming a gate structure on the substrate; forming a first seal layer on a sidewall of the gate structure, wherein the first seal layer is an oxygen-free seal layer and non-L-shaped; forming a lightly doped drain in the substrate adjacent to two sides of the gate structure; and forming a L-shaped second seal layer on a sidewall of the first spacer, wherein the L-shaped second seal layer comprises a material different from the first seal layer. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification