Semiconductor device
A semiconductor device includes a first device including first active regions and first to third structures thereon, and a second device including a second active region, a gate structure intersecting the second active region, and a source/drain region including a lower source/drain region on the second active region having first-type conductivity, an inter-source/drain region insulating layer on the lower source/drain region, and an upper source/drain region on the inter-source/drain region insulating layer and having second-type conductivity. The first structure includes first lower and upper impurity regions. The second structure includes a second lower impurity region having the first-type conductivity, an inter-impurity region insulating layer, and a second upper impurity region having the second-type conductivity. The third structure includes third lower and upper impurity regions having the second-type conductivity, the third upper impurity region having an impurity concentration higher than a that of the third lower impurity region.
1. A semiconductor device, comprising:
a first device including first active regions spaced apart from each other on a substrate, and a first structure, a second structure, and a third structure on each of the first active regions; and
a second device including a second active region spaced apart from the first active regions on the substrate and extending in a first direction parallel to an upper surface of the substrate, at least one gate structure intersecting the second active region and extending in a second direction, a source/drain region including a lower source/drain region on the second active region on at least one side of the gate structure and having first-type conductivity, an inter-source/drain region insulating layer on the lower source/drain region, and an upper source/drain region on the inter-source/drain region insulating layer and having second-type conductivity different from the first-type conductivity, wherein:
the first structure includes a first lower impurity region and a first upper impurity region on the first lower impurity region,
the second structure includes a second lower impurity region having the first-type conductivity, an inter-impurity region insulating layer on the second lower impurity region, and a second upper impurity region on the inter-impurity region insulating layer and having the second-type conductivity, and
the third structure includes a third lower impurity region having the second-type conductivity and a third upper impurity region on the third lower impurity region having the second-type conductivity and having an impurity concentration higher than an impurity concentration of the third lower impurity region.
2. The semiconductor device as claimed in claim 1 , wherein:
the impurity concentration of the third lower impurity region is in a range of about 1×10 19 /cm 3 to 5×10 19 /cm 3 , and
the impurity concentration of the third upper impurity region is in a range of about 1×10 20 /cm 3 to 5×10 20 /cm 3 .
3. The semiconductor device as claimed in claim 1 , wherein the inter-impurity region insulating layer electrically separates the second lower impurity region from the second upper impurity region.
4. The semiconductor device as claimed in claim 1 , wherein:
the second lower impurity region is spaced apart from the second upper impurity region, and
the third lower impurity region is in contact with the third upper impurity region.
5. The semiconductor device as claimed in claim 1 , wherein the inter-impurity region insulating layer includes a same material as a material of the inter-source/drain region insulating layer.
6. The semiconductor device as claimed in claim 1 , wherein:
each of the first lower impurity region and the first upper impurity region has the second-type conductivity,
the first lower impurity region includes a stack structure of first semiconductor layers and second semiconductor layers alternately stacked,
the first semiconductor layers are first material layers,
the second semiconductor layers are second material layers different from the first material layers,
the first upper impurity region includes a third semiconductor layer configured as a third material layer,
the third material layer is different from at least one of the first and second material layers, and
a thickness of the third material layer is greater than a thickness of each of the first and second material layers.
7. The semiconductor device as claimed in claim 1 , wherein:
an impurity concentration of the first lower impurity region is lower than an impurity concentration of the first upper impurity region, and
the first lower impurity region is on substantially the same level as a level of the lower source/drain region.
8. The semiconductor device as claimed in claim 1 , wherein:
the third lower impurity region includes a stack structure of first semiconductor layers and second semiconductor layers alternately stacked,
the third upper impurity region includes a third semiconductor layer,
the third semiconductor layer includes a material different from a material of at least one of the first semiconductor layers and the second semiconductor layers, and
a thickness of the third semiconductor layer is greater than a thickness of each of the first and second semiconductor layers.
9. The semiconductor device as claimed in claim 1 , further comprising:
an emitter contact plug in contact with the first upper impurity region;
a base contact plug in contact with the second lower impurity region; and
a collector contact plug in contact with the third upper impurity region.
10. The semiconductor device as claimed in claim 9 , wherein:
the base contact plug includes a plug layer and a sidewall insulating layer covering a side surface of the plug layer,
the plug layer is spaced apart from the second upper impurity region, and
the base contact plug penetrates the second upper impurity region, and is in contact with the second lower impurity region.
11. The semiconductor device as claimed in claim 9 , wherein the base contact plug includes:
a horizontal contact plug connected to at least a portion of a side surface of the second lower impurity region; and
a vertical contact plug not in contact with the second upper impurity region, and connected to the horizontal contact plug.
12. The semiconductor device as claimed in claim 1 , further comprising dummy gate structures on upper surfaces of each of the second and third structures, respectively, the dummy gate structures extending and being spaced apart from the gate structure,
wherein the dummy gate structures are not on the first structure.
13. A semiconductor device, comprising:
a first device including a first structure, a second structure, and a third structure spaced apart from each other on a substrate;
a second device including an active region extending in a first direction parallel to an upper surface of the substrate, at least one gate structure intersecting the active region and extending in a second direction, a source/drain region including a lower source/drain region on the active region on at least one side of the gate structure and having first-type conductivity, an inter-source/drain region insulating layer on the lower source/drain region, and an upper source/drain region on the inter-source/drain region insulating layer and having second-type conductivity different from the first-type conductivity, wherein:
the first structure includes a first lower impurity region having the second-type conductivity, and a first upper impurity region on the first lower impurity region having the second-type conductivity and having an impurity concentration higher than an impurity concentration of the first lower impurity region,
the second structure includes a second lower impurity region having the first-type conductivity, an inter-impurity region insulating layer on the second lower impurity region, and a second upper impurity region on the inter-impurity region insulating layer and having the second-type conductivity, and
the third structure includes a third lower impurity region having the second-type conductivity, and a third upper impurity region on the third lower impurity region and having the second-type conductivity.
14. The semiconductor device as claimed in claim 13 , further comprising:
an emitter contact plug in contact with at least one of the first upper and lower impurity regions;
a base contact plug in contact with the second lower impurity region; and
a collector contact plug in contact with at least one of the third upper and lower impurity regions.
15. The semiconductor device as claimed in claim 13 , wherein:
the second device includes a plurality of channel layers spaced apart from each other in a direction perpendicular to the upper surface of the substrate on the active region, and in contact with the source/drain region on at least one side, and
the second structure includes dummy channel layers on the same level as a level of the plurality of channel layers, and in contact with at least one side of the second lower impurity region, the inter-impurity region insulating layer, and the second upper impurity region.
16. A semiconductor device, comprising:
a first device including a first structure, a second structure, and a third structure spaced apart from each other on a substrate;
a second device including an active region extending in a first direction parallel to an upper surface of the substrate, at least one gate structure intersecting the active region and extending in a second direction, a source/drain region including a lower source/drain region on the active region on at least one side of the gate structure and having first-type conductivity, an inter-source/drain region insulating layer on the lower source/drain region, and an upper source/drain region on the inter-source/drain region insulating layer and having second-type conductivity different from the first-type conductivity, wherein:
the first structure includes a first lower impurity region having the first-type conductivity, and a first upper impurity region on the first lower impurity region and having the first-type conductivity,
the second structure includes a second lower impurity region having a stack structure of first and second semiconductor layers alternately stacked and having the second-type conductivity, and a second upper impurity region including a third semiconductor layer on the second lower impurity region and having the second-type conductivity,
the first semiconductor layers are first material layers,
the second semiconductor layers are second material layers different from the first material layers,
the third semiconductor layer is a third material layer different from at least one of the first and second material layers,
a thickness of the third material layer is greater than a thickness of each of the first and second material layers, and
the third structure includes a third lower impurity region having the first-type conductivity, an inter-impurity region insulating layer on the third lower impurity region, and a third upper impurity region on the inter-impurity region insulating layer and having the second-type conductivity.
17. The semiconductor device as claimed in claim 16 , further comprising:
an emitter contact plug in contact with at least one of the first upper and lower impurity regions;
a base contact plug in contact with at least one of the second upper and lower impurity regions; and
a collector contact plug in contact with the third lower impurity region.
18. The semiconductor device as claimed in claim 16 , wherein an impurity concentration of the first upper impurity region is higher than an impurity concentration of the first lower impurity region.
19. The semiconductor device as claimed in claim 16 , wherein an impurity concentration of the second lower impurity region is lower than an impurity concentration of the second upper impurity region.
20. The semiconductor device as claimed in claim 16 , wherein:
the third lower impurity region is electrically isolated from the third upper impurity region, and
the second lower impurity region is electrically connected to the second upper impurity region.