IP Library Granted Patent US 8,956,959
Granted Patent B2
US 8,956,959 · App. 13/246,157 · Granted Feb 17, 2015

Method of manufacturing a semiconductor device with two monocrystalline layers

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Quick Facts
Patent No.
US 8,956,959
App. No.
13/246,157
Granted
Feb 17, 2015
Kind
B2
Abstract

A method of manufacturing a semiconductor wafer, the method including: providing a first monocrystalline layer including semiconductor regions defined by a first lithography step; then overlaying the first monocrystalline layer with an isolation layer; preparing a second monocrystalline layer, after the first monocrystalline layer has been formed; transferring the second monocrystalline layer overlying the isolation layer; and then performing a second lithography step patterning portions of the first monocrystalline layer as part of forming at least one transistor in the first monocrystalline layer.

Claims (59)

1. A method of manufacturing a semiconductor wafer, the method comprising a sequence of steps comprising:

providing a first monocrystalline layer;

patterning said first monocrytalline layer;

overlaying said first monocrystalline layer with an isolation layer;

preparing a second monocrystalline layer, after said first monocrystalline layer has been formed;

transferring said second monocrystalline layer using ion-cut, said second monocrystalline layer overlying said isolation layer; and

after transferring said second monocrystalline layer, etching portions of said first monocrystalline layer as part of forming at least one transistor in said first monocrystalline layer.

2. A method of manufacturing a semiconductor wafer according to claim 1 , wherein said at least one transistor is part of a volatile memory cell.

3. A method of manufacturing a semiconductor wafer according to claim 1 , wherein said at least one transistor is part of an RRAM (Resistor Random Access Memory) or Phase Change memory cell.

4. A method of manufacturing a semiconductor wafer according to claim 1 ,

wherein said at least one transistor is part of a charge trap memory cell.

5. A method of manufacturing a semiconductor wafer according to claim 1 , further comprising:

constructing memory peripheral circuits underneath or overlaying said at least one transistor.

6. A method of manufacturing a semiconductor wafer according to claim 5 ,

wherein at least one memory select line is embedded in said second monocrystalline layer.

7. A method of manufacturing a semiconductor wafer according to claim 1 ,

wherein said second monocrystalline layer comprises memory cells, and

wherein said memory cells are of a DRAM, a resistive-RAM, or a phase-change type.

8. A method of manufacturing a semiconductor wafer, the method comprising a sequence of steps comprising:

providing a first monocrystalline layer comprising semiconductor regions defined by a first lithography step; then

overlaying said first monocrystalline layer with an isolation layer;

preparing a second monocrystalline layer, after said first monocrystalline layer has been formed;

transferring said second monocrystalline layer overlying said isolation layer; and then

performing a second lithography step patterning portions of said first monocrystalline layer as part of forming at least one transistor in said first monocrystalline layer.

9. A method of manufacturing a semiconductor wafer according to claim 8 , wherein said at least one transistor is part of an RRAM (Resistor Random Access Memory) or Phase Change memory cell.

10. A method of manufacturing a semiconductor wafer according to claim 8 , wherein said at least one transistor is part of a volatile memory cell.

11. A method of manufacturing a semiconductor wafer according to claim 8 ,

wherein said at least one transistor is part of a charge trap memory cell.

12. A method of manufacturing a semiconductor wafer according to claim 8 , further comprising:

constructing memory peripheral circuits underneath or overlaying said at least one transistor.

13. A method of manufacturing a semiconductor wafer according to claim 12 ,

wherein at least one memory select line is embedded in said second monocrystalline layer.

14. A method of manufacturing a semiconductor wafer according to claim 8

wherein said second monocrystalline layer comprises memory cells, and

wherein said memory cells are of a DRAM, a resistive-RAM, or a phase-change type.

15. A method of manufacturing a semiconductor wafer, the method comprising a sequence of steps comprising:

providing a first monocrystalline layer;

patterning said first monocrystalline layer;

overlaying said first monocrystalline layer with an isolation layer;

preparing a second monocrystalline layer after said first monocrystalline layer has been formed, said second monocrystalline layer overlying said isolation layer; and

after forming said second monocrystalline layer, etching portions of said first monocrystalline layer as part of forming at least one transistor in said first monocrystalline layer,

wherein said second monocrystalline layer comprises memory cells, and

wherein said memory cells are of a volatile type.

16. A method of manufacturing a semiconductor wafer according to claim 15 , wherein said at least one transistor is part of a volatile memory cell.

17. A method of manufacturing a semiconductor wafer according to claim 15 , wherein said at least one transistor is part of an RRAM (Resistor Random Access Memory) or Phase Change memory cell.

18. A method of manufacturing a semiconductor wafer according to claim 15 , wherein at least one memory select line is embedded in said second monocrystalline layer.

19. A method of manufacturing a semiconductor wafer, the method comprising a sequence of steps comprising:

providing a first monocrystalline layer;

patterning said first monocrystalline layer;

overlaying said first monocrystalline layer with an isolation layer;

preparing a second monocrystalline layer after said first monocrystalline layer has been formed, said second monocrystalline layer overlying said isolation layer; and

after forming said second monocrystalline layer, lithographically patterning portions of said first monocrystalline layer as part of forming at least one transistor in said first monocrystalline layer,

wherein said second monocrystalline layer comprises memory cells, and

wherein said memory cells are of a DRAM, a resistive-RAM, or a phase-change type.

20. A method of manufacturing a semiconductor wafer according to claim 19 , wherein said at least one transistor is part of a volatile memory cell.

21. A method of manufacturing a semiconductor wafer according to claim 19 , wherein said preparing a second monocrystalline layer comprises an ion-cut layer transfer.

22. A method of manufacturing a semiconductor wafer according to claim 19 , further comprising:

constructing memory peripheral circuits underneath or overlaying said at least one transistor.

23. A method of manufacturing a semiconductor wafer according to claim 19 , wherein at least one memory select line is embedded in said second monocrystalline layer.

Assignments (4)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 7, 2026
From: MONOLITHLC 3D™ INC.
To: SAMSUNG ELECTRONICS CO. , LTD.
Reel/Frame 073397/0890 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 11, 2022
From: SAMSUNG ELECTRONICS CO., LTD.
To: SAMSUNG ELECTRONICS CO., LTD.
Reel/Frame 058625/0664 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 8, 2020
From: MONOLITHIC 3D INC.
To: SAMSUNG ELECTRONICS CO., LTD.
Reel/Frame 054576/0686 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 20, 2020
From: OR-BACH, ZVI; SEKAR, DEEPAK
To: MONOLITHIC 3D INC.
Reel/Frame 054108/0047 →