Semiconductor device and method of fabricating the same
First Claim
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1. A method of fabricating a semiconductor device, comprising:
- providing a substrate, having a first region and a second region;
forming a plurality of fin-shaped structures, respectively disposed in the first region and the second region of the substrate;
forming a protection layer, conformally covering the substrate and the fin-shaped structures;
forming an interlayer dielectric in the first region and the second region, wherein the protection layer in the first region and the second region is partially exposed from the interlayer dielectric;
forming an etch mask, covering the fin-shaped structures in the second region; and
etching the protection layer exposed from the interlayer dielectric in the first region before removing the etch mask;
growing an epitaxial layer on each of the fin-shaped structures exposed from the interlayer dielectric and in the first region after the step of etching the protection layer; and
forming two gate metal layers, respectively covering the epitaxial layers in the first region and the protection layer in the second region.
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Abstract
A semiconductor device includes a substrate, fin-shaped structures, a protection layer, epitaxial layers, and a gate electrode. The fin-shaped structures are disposed in a first region and a second region of the substrate. The protection layer conformally covers the surface of the substrate and the sidewalls of fin-shaped structures. The epitaxial layers respectively conformally and directly cover the fin-shaped structures in the first region. The gate electrode covers the fin-shaped structures in the second region, and the protection layer is disposed between the gate electrode and the fin-shaped structures.
11 Citations
8 Claims
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1. A method of fabricating a semiconductor device, comprising:
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providing a substrate, having a first region and a second region; forming a plurality of fin-shaped structures, respectively disposed in the first region and the second region of the substrate; forming a protection layer, conformally covering the substrate and the fin-shaped structures; forming an interlayer dielectric in the first region and the second region, wherein the protection layer in the first region and the second region is partially exposed from the interlayer dielectric; forming an etch mask, covering the fin-shaped structures in the second region; and etching the protection layer exposed from the interlayer dielectric in the first region before removing the etch mask; growing an epitaxial layer on each of the fin-shaped structures exposed from the interlayer dielectric and in the first region after the step of etching the protection layer; and forming two gate metal layers, respectively covering the epitaxial layers in the first region and the protection layer in the second region. - View Dependent Claims (2, 3, 4)
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5. A method of fabricating a semiconductor device, comprising:
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providing a substrate, having a first region and a second region; forming a plurality of fin-shaped structures, respectively disposed in the first region and the second region of the substrate; forming a protection layer, conformally covering the substrate and the fin-shaped structures; forming an interlayer dielectric in the first region and the second region, wherein the protection layer in the first region and the second region is partially exposed from the interlayer dielectric; forming an etch mask, covering the fin-shaped structures in the second region; etching the protection layer exposed from the interlayer dielectric in the first region before removing the etch mask; growing an epitaxial layer on each of the fin-shaped structures exposed from the interlayer dielectric and in the first region after the step of etching the protection layer; depositing a dielectric layer, conformally covering each of the epitaxial layers in the first region and the etch mask in the second region; removing the etch mask and the dielectric layer in the second region; and etching the protection layer exposed from the interlayer dielectric and in the second region before removing the dielectric layer in the first region. - View Dependent Claims (6, 7)
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8. A method of fabricating a semiconductor device, comprising:
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providing a substrate, having a first region and a second region; forming a plurality of fin-shaped structures, respectively disposed in the first region and the second region of the substrate; forming a protection layer, conformally covering the substrate and the fin-shaped structures; forming an interlayer dielectric in the first region and the second region, wherein the protection layer in the first region and the second region is partially exposed from the interlayer dielectric; forming an etch mask, covering the fin-shaped structures in the second region; etching the protection layer exposed from the interlayer dielectric in the first region before removing the etch mask; growing an epitaxial layer on each of the fin-shaped structures exposed from the interlayer dielectric and in the first region after the step of etching the protection layer; and growing a plurality of another epitaxial layers, respectively disposed on the epitaxial layers in the first region and on the fin-shaped structures in the second region.
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Specification