Patent ID: 11881443
Assignee: MONOLITHIC 3D INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 1:
2. A 3D semiconductor device, the device comprising:
a first level comprising a plurality of first metal layers;
a second level,
wherein said second level overlays said first level,
wherein said second level comprises at least one single crystal silicon layer,
wherein said second level comprises a plurality of transistors,
wherein each transistor of said plurality of transistors comprises a single crystal channel,
wherein said second level comprises a plurality of second metal layers,
wherein said plurality of second metal layers comprise interconnections between said transistors of said plurality of transistors, and
wherein said second level is overlaid by a first isolation layer; and

a connective path from said plurality of transistors to said plurality of first metal layers,
wherein said connective path comprises at least one via disposed through at least said single crystal silicon layer,
wherein at least one of said at least one via comprises a contact to at least one of said transistors, and
wherein at least one of said transistors comprises a four sided gate.