Source: https://patents.google.com/patent/US8809114B2/en
Timestamp: 2018-07-20 13:09:27
Document Index: 454371407

Matched Legal Cases: ['Application No. 2007', 'Application No. 099141295', 'Application No. 097124473', 'Application No. 201110447977', 'Application No. 10', 'Application No. 2014', 'Application No. 22014', 'Application No. 2010', 'Application No. 2010', 'Application No. 2009', 'Application No. 201210124956', 'Application No. 097124473']

US8809114B2 - Memory cell that employs a selectively grown reversible resistance-switching element and methods of forming the same - Google Patents
US8809114B2
US8809114B2 US13964157 US201313964157A US8809114B2 US 8809114 B2 US8809114 B2 US 8809114B2 US 13964157 US13964157 US 13964157 US 201313964157 A US201313964157 A US 201313964157A US 8809114 B2 US8809114 B2 US 8809114B2
US13964157
US20130320287A1 (en )
A method of forming a memory cell is provided that includes forming a steering element above a substrate, forming a material layer on the substrate, patterning and etching the material layer, and oxidizing the patterned and etched material layer to form a reversible resistance-switching material. Numerous other aspects are provided.
This application is a division of U.S. patent application Ser. No. 13/464,115, filed May 4, 2012, now U.S. Pat. No. 8,507,315, which is a continuation of U.S. patent application Ser. No. 12/915,290, filed Oct. 29, 2010, now U.S. Pat. No. 8,173,486, which is a continuation of U.S. patent application Ser. No. 11/772,082, filed Jun. 29, 2007, now U.S. Pat. No. 7,824,956.
U.S. patent application Ser. No. 11/772,081, filed Jun. 29, 2007, now abandoned, and titled “Method To Form A Rewriteable Memory Cell Comprising A Diode And A Resistivity-Switching Grown Oxide.”
U.S. patent application Ser. No. 11/772,084, filed Jun. 29, 2007, now U.S. Pat. No. 8,233,308, and titled “Memory Cell That Employs A Selectively Deposited Reversible Resistance-Switching Element And Methods Of Forming The Same.”
In a first aspect of the invention, a method of forming a memory cell is provided that includes forming a steering element above a substrate, forming a material layer on the substrate, patterning and etching the material layer, and oxidizing the patterned and etched material layer to form a reversible resistance-switching material.
In a second aspect of the invention, a method of forming a memory cell is provided that includes forming a first conductor above a substrate, forming a material layer on the substrate, patterning and etching the material layer, oxidizing the patterned and etched material layer to form a reversible resistance-switching material, forming a diode above the first conductor, and forming a second conductor above the diode and the reversible resistance-switching element.
forming a diode above a substrate; and
patterning and etching the material layer; and
oxidizing the patterned and etched material layer to form a reversible resistance-switching material.
2. The method of claim 1, wherein the material layer comprises one or more of Ta, TaN, Nb, NbN, Al, AIN, Hf, HfN, V, and VN.
3. The method of claim 1, wherein the reversible resistance-switching material comprises one or more of Ta2O5, Nb2O5, Al2O3, Hf0 2, and V2O5.
4. The method of claim 1, wherein forming the diode comprises forming a polycrystalline diode.
5. The method of claim 1, wherein forming the diode comprises forming a vertical polycrystalline diode.
6. The method of claim 1, wherein forming the diode comprises forming a p-n diode or a p-i-n diode.
7. The method of claim 1, wherein the reversible resistance-switching element has an oxide thickness of about 500 angstroms or less.
8. The method of claim 1, wherein the reversible resistance-switching element has an oxide thickness of about 300 angstroms or less.
9. The method of claim 1, further comprising coupling the steering element and reversible resistance-switching element in series.
10. A memory cell formed according to the method of claim 1.
oxidizing the patterned and etched material layer to form a reversible resistance-switching material;
12. The method of claim 11, wherein the material layer comprises one or more of Ta, TaN, Nb, NbN, Al, AIN, Hf, HfN, V, and VN.
13. The method of claim 11, wherein the reversible resistance-switching material comprises one or more of Ta2O5, Nb2O5, Al2 0 3, HfO2, and V2O5.
14. The method of claim 11, wherein forming the diode comprises forming a vertical polycrystalline diode.
15. The method of claim 14, further comprising forming a silicide, silicide-germanide or germanide region in contact with polycrystalline material of the vertical polycrystalline diode so that the polycrystalline material is in a low-resistivity state.
16. The method of claim 11, wherein the reversible resistance-switching element has an oxide thickness of about 500 angstroms or less.
17. The method of claim 11, wherein the reversible resistance-switching element has an oxide thickness of about 300 angstroms or less.
18. The method of claim 11, further comprising coupling the diode and the reversible resistance-switching element in series.
19. A memory cell formed according to the method of claim 11.
a first memory level formed above a substrate, the first memory level comprising a plurality of memory cells, each memory cell formed according to the method of claim 1; and
a first memory level formed above a substrate, the first memory level comprising a plurality of memory cells, each memory cell formed according to the method of claim 11; and
US13964157 2007-06-29 2013-08-12 Memory cell that employs a selectively grown reversible resistance-switching element and methods of forming the same Active US8809114B2 (en)
US13464115 Division US8507315B2 (en) 2007-06-29 2012-05-04 Memory cell that employs a selectively grown reversible resistance-switching element and methods of forming the same
US20130320287A1 true US20130320287A1 (en) 2013-12-05
US8809114B2 true US8809114B2 (en) 2014-08-19
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JP2007053199A (en) 2005-08-17 2007-03-01 Toshiba Corp Method of manufacturing integrated circuit device
EP1914806B1 (en) 2005-08-05 2013-09-25 Sharp Kabushiki Kaisha Variable resistor element and production method therefor and storage device provided with it
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US20120280202A1 (en) 2006-03-31 2012-11-08 Tanmay Kumar Heterojunction device comprising a semiconductor and a resistivity-switching oxide or nitride
US20110042639A1 (en) 2007-06-29 2011-02-24 April Schricker Memory cell that employs a selectively grown reversible resistance-switching element and methods of forming the same
US20130146832A1 (en) 2007-06-29 2013-06-13 Sandisk 3D Llc Memory cell that employs a selectively grown reversible resistance-switching element and methods of forming the same
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