Structure and formation method of fin-like field effect transistor
First Claim
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1. A semiconductor device structure, comprising:
- a semiconductor substrate;
a fin structure over the semiconductor substrate;
a gate stack covering a portion of the fin structure;
an epitaxially grown source/drain structure over the fin structure and adjacent to the gate stack; and
a semiconductor protection layer over the epitaxially grown source/drain structure, wherein the semiconductor protection layer has an atomic concentration of silicon greater than that of the epitaxially grown source/drain structure, and the semiconductor protection layer is not between the gate stack and the portion of the fin structure covered by the gate stack.
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Abstract
A structure and a formation method of a semiconductor device are provided. The semiconductor device includes a semiconductor substrate and a fin structure over the semiconductor substrate. The semiconductor device also includes a gate stack covering a portion of the fin structure and an epitaxially grown source/drain structure over the fin structure and adjacent to the gate stack. The semiconductor device further includes a semiconductor protection layer over the epitaxially grown source/drain structure. The semiconductor protection layer has an atomic concentration of silicon greater than that of the epitaxially grown source/drain structure.
13 Citations
20 Claims
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1. A semiconductor device structure, comprising:
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a semiconductor substrate; a fin structure over the semiconductor substrate; a gate stack covering a portion of the fin structure; an epitaxially grown source/drain structure over the fin structure and adjacent to the gate stack; and a semiconductor protection layer over the epitaxially grown source/drain structure, wherein the semiconductor protection layer has an atomic concentration of silicon greater than that of the epitaxially grown source/drain structure, and the semiconductor protection layer is not between the gate stack and the portion of the fin structure covered by the gate stack. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A semiconductor device structure, comprising:
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a semiconductor substrate; a first fin structure over the semiconductor substrate; a gate stack covering a portion of the first fin structure; a first epitaxially grown source/drain structure over the first fin structure; a second fin structure over the semiconductor substrate; a second epitaxially grown source/drain structure over the second fin structure; a first semiconductor protection layer over the first epitaxially grown source/drain structure, wherein the first semiconductor protection layer has an atomic concentration of silicon greater than that of the first epitaxially grown source/drain structure, and the first semiconductor protection layer is not between the gate stack and the portion of the first fin structure covered by the gate stack; and a second semiconductor protection layer over the second epitaxially grown source/drain structure, wherein the second semiconductor protection layer has an atomic concentration of silicon greater than that of the second epitaxially grown source/drain structure. - View Dependent Claims (12, 13, 14, 15)
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16. A semiconductor device structure, comprising:
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a semiconductor substrate; a fin structure over the semiconductor substrate; a gate stack covering a portion of the fin structure; an epitaxially grown source/drain structure over the fin structure; and a semiconductor protection layer over the epitaxially grown source/drain structure, wherein the semiconductor protection layer has an atomic concentration of a semiconductor element greater than that of the epitaxially grown source/drain structure, and the gate stack is in direct contact with the portion of the fin structure covered by the gate stack. - View Dependent Claims (17, 18, 19, 20)
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Specification