SEMICONDUCTOR DEVICE
First Claim
1. A semiconductor device, comprising:
- a substrate including a first region and a second region;
fin type active areas extending in a first direction away from the substrate, the fin type active areas being included in each of the first and second regions;
a plurality of nanosheets extending parallel to an upper surface of the fin type active areas and being spaced apart from the upper surface of the fin type active areas, each of the nanosheets having a channel region;
a gate extending over the fin type active areas in a second direction crossing the first direction, wherein the gate surrounds at least a portion of each of the nanosheets;
a gate dielectric layer interposed between the nanosheets and the gate;
first source and drain regions included in the first region, and second source and drain regions included in the second region, the first source and drain regions and the second source and drain regions being connected to the nanosheets and respectively including materials different from one another; and
insulating spacers interposed between the fin type active areas and the nanosheets, whereinair spacers are interposed between the insulating spacers and the first source and drain regions in the first region.
1 Assignment
0 Petitions
Accused Products
Abstract
A semiconductor device includes a substrate including a first region and a second region, fin type active areas extending in a first direction away from the substrate in each of the first and second regions, a plurality of nanosheets extending parallel to an upper surface of the fin type active areas and being spaced apart from the upper surface of the fin type active areas, a gate extending over the fin type active areas in a second direction crossing the first direction, a gate dielectric layer interposed between the gate and each of the nanosheets, first source and drain regions included in the first region and second source and drain regions included in the second region, and insulating spacers interposed between the fin type active areas and the nanosheets, wherein air spacers are interposed between the insulating spacers and the first source and drain regions.
82 Citations
20 Claims
-
1. A semiconductor device, comprising:
-
a substrate including a first region and a second region; fin type active areas extending in a first direction away from the substrate, the fin type active areas being included in each of the first and second regions; a plurality of nanosheets extending parallel to an upper surface of the fin type active areas and being spaced apart from the upper surface of the fin type active areas, each of the nanosheets having a channel region; a gate extending over the fin type active areas in a second direction crossing the first direction, wherein the gate surrounds at least a portion of each of the nanosheets; a gate dielectric layer interposed between the nanosheets and the gate; first source and drain regions included in the first region, and second source and drain regions included in the second region, the first source and drain regions and the second source and drain regions being connected to the nanosheets and respectively including materials different from one another; and insulating spacers interposed between the fin type active areas and the nanosheets, wherein air spacers are interposed between the insulating spacers and the first source and drain regions in the first region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A semiconductor device, comprising:
-
a substrate including active areas in each of first and second regions; at least one nanosheet stack structure facing upper surfaces of the active areas and being spaced apart from the upper surfaces of the active areas, the at least one nanosheet stack structure including a plurality of nanosheets each having a channel region; a gate extending over the active areas in a direction crossing the active areas, the gate covering the at least one nanosheet stack structure, wherein the gate includes a main gate portion disposed over the at least one nanosheet stack structure and a plurality of sub-gate portions disposed under each of the plurality of nanosheets; a gate dielectric layer interposed between the at least one nanosheet stack structure and the gate; first source and drain regions included in the first region, and second source and drain regions included in the second region, the first source and drain regions and the second source and drain regions being connected to the nanosheets; a first insulating spacer disposed on the plurality of nanosheets, the first insulating spacer covering sidewalls of the gate; and a plurality of second insulating spacers interposed between the sub-gate portions and the first source and drain regions in spaces between the upper surfaces of the active areas and the at least one nanosheet stack structure and spaces between the plurality of nanosheets in the first region and interposed between the sub-gate portions and the second source and drain regions in spaces between the upper surfaces of the active areas and the at least one nanosheet stack structure and the spaces between the plurality of nanosheets in the second region, wherein air spacers are interposed between the second insulating spacers and the first source and drain regions in the first region, and the second insulating spacers contact the second source and drain regions in the second region. - View Dependent Claims (12, 13, 14, 15)
-
-
16. A semiconductor device, comprising:
-
a substrate including a first region and a second region adjacent to each other; a first nanosheet stack structure in the first region, and a second nanosheet stack structure in the second region, the first and second nanosheet structures each including a lowermost nanosheet coplanar with one another, a metal or metal nitride conductive layer on the lowermost nanosheet, and a second nanosheet on the conductive layer, the second nanosheet having a width greater than that of the conductive layer such that the second nanosheet overhangs the conductive layer to form a recess; first source and drain regions disposed on opposite sides of the first nanosheet stack structure; second source and drain regions disposed on opposite sides of the second nanosheet stack structure; insulating spacers disposed in the recesses of the first and second nanosheet stack structures, the insulating spacers in the recesses of the second nanosheet stack structure contacting the second source and drain regions, and the insulating spacers in the recesses of the first nanosheet stack structure being separated from the first source and drain regions by an air gap. - View Dependent Claims (17, 18, 19, 20)
-
Specification