Semiconductor device

1. A semiconductor device comprising:

a substrate;

first, second, third and fourth bottom contacts in the substrate;

first, second, third and fourth active fins on respective ones of the first, second, third and fourth bottom contacts, the second and third active fins overlapping in a first direction;

first, second and third gate electrodes extending lengthwise in the first direction, the first and second gate electrodes disposed on side surfaces of respective ones of the first and fourth active fins and the third gate electrode disposed on side surfaces of the second and third active fins;

a first top contact on the first and second active fins; and

a second top contact on the third and fourth active fins.

2. The semiconductor device of claim 1 ,

wherein the first and second bottom contacts overlap in a second direction and are spaced apart from each other in the second direction,

wherein the third and fourth bottom contacts overlap in the second direction and are spaced apart from each other in the second direction,

wherein the first and second bottom contacts are spaced apart from the third and fourth bottom contacts in the first direction,

wherein the second and third bottom contacts overlap in the first direction, and

wherein the first and fourth bottom contacts do not overlap in the first direction.

3. The semiconductor device of claim 1 , further comprising first, second, third and fourth source/drain regions between the first, second, third and fourth bottom contacts and the first, second, third and fourth active fins, respectively.

4. The semiconductor device of claim 1 , further comprising first, second, third and fourth source/drain regions between the first and second top contacts and the first, second, third and fourth active fins.

5. The semiconductor device of claim 4 , wherein the first and second source/drain regions are connected by the first top contact and wherein the third and fourth source/drain regions are connected by the second top contact.

6. The semiconductor device of claim 1 , wherein the first and second active fins have n-type conductivity type and wherein the third and fourth active fins have p-type conductivity type.

7. The semiconductor device of claim 1 , further comprising a first dummy gate electrode extending lengthwise in the first direction between the first and third gate electrodes.

8. The semiconductor device of claim 7 , further comprising a second dummy gate electrode extending lengthwise in the first direction between the third and second gate electrodes.

9. A semiconductor device comprising:

a substrate;

first, second and third bottom contacts in the substrate;

first, second and third active fins on respective ones of the first, second and third bottom contacts, the second and third active fins overlapping in a first direction;

first and second gate electrodes extending lengthwise in the first direction, the first gate electrode disposed on side surfaces of the first active fin, the second gate electrode disposed on side surfaces of the second and third active fins;

first dummy gate electrode extending lengthwise in the first direction between the first and second gate electrodes; and

a first top contact on the first and second active fins.

10. The semiconductor device of claim 9 , further comprising

a fourth bottom contact in the substrate,

a fourth active fin on the fourth bottom contact, and

a third gate electrode extending lengthwise in the first direction, the third gate electrode disposed on side surfaces of the fourth active fin.

11. The semiconductor device of claim 10 , further comprising a second top contact on the third and fourth active fins.

12. The semiconductor device of claim 10 ,

wherein the first and second bottom contacts overlap in a second direction and are spaced apart from each other in the second direction,

wherein the third and fourth bottom contacts overlap in the second direction and are spaced apart from each other in the second direction,

wherein the first and second bottom contacts are spaced apart from the third and fourth bottom contacts in the first direction,

wherein the second and third bottom contacts overlap in the first direction, and

wherein the first and fourth bottom contacts do not overlap in the first direction.

13. The semiconductor device of claim 10 , further comprising a second dummy gate electrode extending lengthwise in the first direction between the second and third gate electrodes.

14. The semiconductor device of claim 9 , further comprising first and second top source/drain regions between the first top contact and the first and second active fins.

15. The semiconductor device of claim 9 , further comprising first, second and third bottom source/drain regions between the first, second and third bottom contacts and the first, second and third active fins, respectively.

16. A semiconductor device comprising:

a substrate;

first, second, third and fourth bottom contacts in the substrate;

first, second, third and fourth active fins on respective ones of the first, second, third and fourth bottom contacts, the second and third active fins overlapping in a first direction;

first, second and third gate electrodes extending lengthwise in the first direction, the first and second gate electrodes disposed on side surfaces of respective ones of the first and fourth active fins and the third gate electrode disposed on side surfaces of the second and third active fins;

a first dummy gate electrode extending lengthwise in the first direction between the first and third gate electrodes;

a first top contact on the first and second active fins;

first and second top source/drain regions between the first top contact and the first and second active fins; and

first, second, third and fourth bottom source/drain regions between the first, second, third and fourth bottom contacts and the first, second, third and fourth active fins, respectively.

17. The semiconductor device of claim 16 , further comprising a second dummy gate electrode extending lengthwise in the first direction between the third and second gate electrodes.

18. The semiconductor device of claim 16 ,

wherein the first and second bottom contacts overlap in a second direction and are spaced apart from each other in the second direction,

wherein the third and fourth bottom contacts overlap in the second direction and are spaced apart from each other in the second direction,

wherein the first and second bottom contacts are spaced apart from the third and fourth bottom contacts in the first direction,

wherein the second and third bottom contacts overlap in the first direction, and

wherein the first and fourth bottom contacts do not overlap in the first direction.

19. The semiconductor device of claim 16 ,

wherein the first and second top source/drain regions are connected by the first top contact.

20. The semiconductor device of claim 16 , further comprising

a second top contact on the third and fourth active fins, and third and fourth top source/drain regions between the second top contact and the third and fourth active fins.