Semiconductor structure and system for fabricating an integrated circuit chip
View Patent ↗A semiconductor structure and a system for fabricating an integrated circuit chip. The semiconductor structure includes: a buried oxide layer on a semiconductor wafer; a thin fin structure on the buried oxide layer, wherein the thin fin structure includes a first hard mask on a semiconductor fin, wherein the semiconductor fin is disposed between the first hard mask and a surface of the buried oxide layer; and a thick mesa structure on the buried oxide layer, and wherein the thick mesa structure includes a semiconductor mesa. The system for fabricating an integrated circuit chip enables: providing a buried oxide layer on and in direct mechanical contact with a semiconductor wafer; and concurrently forming at least one fin-type field effect transistor and at least one thick-body device on the buried oxide layer.
1. A semiconductor structure, comprising;
a buried oxide layer on and in direct mechanical contact with a semiconductor wafer;
a thin fin structure on the buried oxide layer, wherein the thin fin structure comprises a first hard mask on a semiconductor fin, wherein the semiconductor fin is disposed between and in direct mechanical contact with the first hard mask and a surface of the buried oxide layer; and
a thick mesa structure on the buried oxide layer, wherein the thick mesa structure comprises a semiconductor mesa in direct mechanical contact with the surface of the buried oxide layer,
wherein the thick mesa structure comprises a source region and a drain region,
wherein the source region and drain regions are each on and in direct mechanical contact with the semiconductor mesa structure,
wherein the semiconductor mesa is disposed between the surface of the buried oxide layer and both the source region and the drain region, and
wherein the semiconductor structure further comprises:
a first gate oxide covering opposite sides of the semiconductor fin, wherein the first gate oxide is in direct mechanical contact with the surface of the buried oxide layer; and
a second gate oxide covering opposite sides of the thick mesa structure and a top surface of the thick mesa structure, wherein the second gate oxide is in direct mechanical contact with the surface of the buried oxide layer.
2. A semiconductor structure, comprising;
a buried oxide layer on and in direct mechanical contact with a semiconductor wafer;
a thin fin structure on the buried oxide layer, wherein the thin fin structure comprises a first hard mask on a semiconductor fin, wherein the semiconductor fin is disposed between and in direct mechanical contact with the first hard mask and a surface of the buried oxide layer; and
a thick mesa structure on the buried oxide layer, wherein the thick mesa structure comprises a semiconductor mesa in direct mechanical contact with the surface of the buried oxide layer,
wherein the semiconductor structure further comprises:
a first gate oxide covering opposite sides of the semiconductor fin, wherein the first gate oxide is in direct mechanical contact with the surface of the buried oxide layer; and
a second gate oxide covering opposite sides of the thick mesa structure and a top surface of the thick mesa structure, wherein the second gate oxide is in direct mechanical contact with the surface of the buried oxide layer; and
a continuous gate structure on and in direct mechanical contact with the thin fin structure and the thick mesa structure.
3. A semiconductor structure, comprising;
a buried oxide layer on and in direct mechanical contact with a semiconductor wafer;
a thin fin structure on the buried oxide layer, wherein the thin fin structure comprises a first hard mask on a semiconductor fin, wherein the semiconductor fin is disposed between and in direct mechanical contact with the first hard mask and a surface of the buried oxide layer; and
a thick mesa structure on the buried oxide layer, wherein the thick mesa structure comprises a semiconductor mesa in direct mechanical contact with the surface of the buried oxide layer,
wherein the semiconductor structure further comprises:
a first gate oxide covering opposite sides of the semiconductor fin, wherein the first gate oxide is in direct mechanical contact with the surface of the buried oxide layer; and
a second gate oxide covering opposite sides of the thick mesa structure and a top surface of the thick mesa structure, wherein the second gate oxide is in direct mechanical contact with the surface of the buried oxide layer;
a first gate on the buried oxide layer and on and in direct mechanical contact with the thin fin structure, wherein the first gate is in direct mechanical contact with the buried oxide layer; and
a second gate on the buried oxide layer and on and in direct mechanical contact with the thick mesa structure, wherein the second gate is in direct mechanical contact with the buried oxide layer.
4. The semiconductor structure of claim 3 , wherein the semiconductor structure further comprises an oxide that encases the thin fin structure and the thick mesa structure.
5. The semiconductor structure of claim 4 , wherein the semiconductor structure further comprises body contacts encased within the oxide, and wherein the body contacts are disposed on opposite sides of the second gate.
6. The semiconductor structure of claim 5 , wherein the second gate is H-shaped.