Hybrid planarFET and FinFET provided on a chip
View Patent ↗A semiconductor device includes: a FinFET (Fin Field Effect Transistor); and a PlanarFET (Planar Field Effect Transistor). The FinFET is provided on a chip. The PlanarFET is provided on the chip. A second gate insulating layer of the PlanarFET is thicker than a first gate insulating layer of the FinFET.
1. A semiconductor device comprising:
a FinFET (Fin Field Effect Transistor) configured to be provided on a chip; and
a PlanarFET (Planar Field Effect Transistor) configured to be provided on said chip,
wherein a second gate insulating layer of said PlanarFET is thicker than a first gate insulating layer of said FinFET,
wherein said second, gate insulating layer exists under a second side wall provided on a side surface of a second gate electrode of said PlanarFET,
wherein said first gate insulating layer does not exist under a first side wall provided on a side surface of a first gate electrode of said FinFET,
wherein a gate length of said PlanarFET is longer than a gate length of said FinFET, wherein said PlanarFET includes:
a second offset spacer configured to be provided between said second gate electrode and said second side wall, and
wherein said FinFET includes:
a first offset spacer configured to be provided between said first gate electrode and said first side wall.
2. The semiconductor device according to claim 1 ,
wherein said second offset spacer is further extended between said second side wall and said second gate insulating layer, and
wherein said first offset spacer is further extended between said first side wall and a surface of a substrate.
3. The semiconductor device according to claim 1 ,
wherein top surfaces of a source and a drain of said FinFET swell up from a level of a boundary between said first gate insulating layer and a first channel region, and
wherein top surfaces of a source and a drain of said PlanarFET is at a level of a boundary between said second gate insulating layer and a second channel region.
4. The semiconductor device according to claim 1 , wherein said FinFET includes:
an insulating portion configured to be provided at a place between a first gate electrode of said FinFET and a top surface of a fin of said FinFET.
5. The semiconductor device according to claim 1 , wherein said Fin FET comprises a core transistor, and
wherein said PlanarFET comprises an I/O transistor.
6. The semiconductor device according to claim 1 , wherein said PlanarFET comprises a second offset spacer configured to be provided between said second gate electrode and said second side wall.
7. The semiconductor device according to claim 1 , wherein said FinFET comprises a first offset spacer configured to be provided between said first gate electrode and said first side wall.
8. The semiconductor device according to claim 1 , wherein top surfaces of a source and a drain of said FinFET swell up from a level of a boundary between said first gate insulating layer and a first channel region.
9. The semiconductor device according to claim 1 , wherein top surfaces of a source and a drain of said PlanarFET is at a level of a boundary between said second gate insulating layer and a second channel region.