Gate all around device structure and Fin field effect transistor (FinFET) device structure
First Claim
1. A vertical gate all around (GAA) device structure, comprising:
- a substrate;
an isolation structure formed in the substrate;
a first transistor structure formed on the substrate, wherein the first transistor structure comprises a vertical structure, and the vertical structure comprises a source region, a channel region and a drain region, and wherein the channel region is formed between the source region and the drain region, and the channel region has a horizontal portion and a sloped portion sloping downward toward the isolation structure, the sloped portion comprises a first sidewall sloping downward toward the isolation structure and adjoining the source region and a second sidewall sloping downward toward the isolation structure and adjoining the drain region, the first sidewall is spaced apart from the second sidewall, and the first sidewall and the second sidewall overlap from a top view of the vertical gate all around (GAA) device structure; and
a gate stack structure wrapping around the channel region.
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Abstract
A gate all around (GAA) device structure, vertical gate all around (VGAA) device structure, horizontal gate all around (HGAA) device structure and fin field effect transistor (FinFET) device structure are provided. The VGAA device structure includes a substrate and an isolation structure formed in the substrate. The VGAA device structure also includes a first transistor structure formed on the substrate, and the first transistor structure includes a vertical structure. The vertical structure includes a source region, a channel region and a drain region, and the channel region is formed between the source region and the drain region. The channel region has a horizontal portion and a sloped portion sloping downward toward the isolation structure. The VGAA device structure further includes a gate stack structure wrapping around the channel region.
24 Citations
20 Claims
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1. A vertical gate all around (GAA) device structure, comprising:
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a substrate; an isolation structure formed in the substrate; a first transistor structure formed on the substrate, wherein the first transistor structure comprises a vertical structure, and the vertical structure comprises a source region, a channel region and a drain region, and wherein the channel region is formed between the source region and the drain region, and the channel region has a horizontal portion and a sloped portion sloping downward toward the isolation structure, the sloped portion comprises a first sidewall sloping downward toward the isolation structure and adjoining the source region and a second sidewall sloping downward toward the isolation structure and adjoining the drain region, the first sidewall is spaced apart from the second sidewall, and the first sidewall and the second sidewall overlap from a top view of the vertical gate all around (GAA) device structure; and a gate stack structure wrapping around the channel region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A vertical gate all around (GAA) device structure, comprising:
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a substrate; an isolation structure formed in the substrate; an ILD layer formed over the isolation structure; a vertical structure formed on the substrate, wherein the vertical structure comprises a sloped region which is sloping downward toward the isolation structure, and the sloped region is in direct contact with the ILD layer; and a gate stack structure adjoining a portion of the sloped region. - View Dependent Claims (15, 16, 17)
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18. A vertical gate all around (GAA) device structure, comprising:
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a substrate; a first vertical structure formed on the substrate; a second vertical structure formed on the substrate; an isolation structure formed in the substrate, wherein the isolation structure is formed between the first vertical structure and the second vertical structure, the first vertical structure comprise a first sloped region toward the isolation structure, the second vertical structure comprise a second sloped region far away from the isolation structure, the first sloped portion comprises a first sidewall sloping downward toward the isolation structure and adjoining the source region and a second sidewall sloping downward toward the isolation structure and adjoining the drain region, the first sidewall is spaced apart from the second sidewall, and the first sidewall and the second sidewall overlap from a top view of the vertical gate all around (GAA) device structure; a first gate stack structure wrapping around the first sloped region; and a second gate stack structure wrapping around the second sloped region. - View Dependent Claims (19, 20)
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Specification