Patent ID: 11876011
Assignee: MONOLITHIC 3D INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G  B | IPC G  H

Claim 14:
15. A 3D semiconductor device, the device comprising:
a first level comprising a first single crystal layer, said first level comprising first transistors,
wherein each of said first transistors comprises a single crystal channel;

first metal layers interconnecting at least said first transistors;
a second metal layer overlaying said first metal layers;
a first oxide layer disposed over said second metal layer;
a second oxide layer disposed over said first oxide layer;
a second level comprising a plurality of second transistors; and
at least one second level metal layer disposed over said plurality of second transistors,
wherein said second level overlays said first level,
wherein at least one of said second transistors is a n type transistor,
wherein at least one of said second transistors is a p type transistor,
wherein said at least one second level metal layer comprises interconnection between said n type transistor and said p type transistor,
wherein said second level is directly bonded to said first level, and
wherein said bonded comprises direct oxide-to-oxide bonds.