Patents by Inventor Oleksandr Mosendz
Oleksandr Mosendz has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 12256557Abstract: A memory device includes a memory material portion, and an ovonic threshold switch selector element. The ovonic threshold switch selector element includes a first carbon-containing electrode comprising carbon and a metal, a second carbon-containing electrode comprising the carbon and the metal, and an ovonic threshold switch material portion located between the first electrode and the second electrode.Type: GrantFiled: January 19, 2022Date of Patent: March 18, 2025Assignee: Sandisk Technologies, Inc.Inventors: Oleksandr Mosendz, James Reiner, Bruce Terris, John Read
-
Patent number: 12144185Abstract: A method includes forming a first electrode layer over a substrate, forming an ovonic threshold switch (OTS) material layer over the first electrode layer, microwave annealing the OTS material layer, and forming a second electrode layer over the OTS material layer.Type: GrantFiled: February 2, 2022Date of Patent: November 12, 2024Assignees: Sandisk Technologies, Inc., POHANG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Oleksandr Mosendz, Hyunsang Hwang, Jangseop Lee, Raghuveer S. Makala
-
Publication number: 20230247843Abstract: A method includes forming a first electrode layer over a substrate, forming an ovonic threshold switch (OTS) material layer over the first electrode layer, microwave annealing the OTS material layer, and forming a second electrode layer over the OTS material layer.Type: ApplicationFiled: February 2, 2022Publication date: August 3, 2023Inventors: Oleksandr MOSENDZ, Hyunsang HWANG, Jangseop LEE, Raghuveer S. MAKALA
-
Publication number: 20230232639Abstract: A memory device includes a memory material portion, and an ovonic threshold switch selector element. The ovonic threshold switch selector element includes a first carbon-containing electrode comprising carbon and a metal, a second carbon-containing electrode comprising the carbon and the metal, and an ovonic threshold switch material portion located between the first electrode and the second electrode.Type: ApplicationFiled: January 19, 2022Publication date: July 20, 2023Inventors: Oleksandr MOSENDZ, James REINER, Bruce TERRIS, John READ
-
Patent number: 10726893Abstract: A perpendicular spin orbit torque MRAM memory cell comprises a magnetic tunnel junction that includes a free layer in a plane, a ferromagnetic layer and a spacer layer between the ferromagnetic layer and the free layer. The free layer comprises a switchable direction of magnetization perpendicular to the plane. The ferromagnetic layer is configured to generate perpendicularly polarized spin current in response to an electrical current through the ferromagnetic layer and inject the perpendicularly polarized spin current through the spacer layer into the free layer to change the direction of magnetization of the free layer.Type: GrantFiled: December 12, 2018Date of Patent: July 28, 2020Assignee: SANDISK TECHNOLOGIES LLCInventors: Goran Mihajlovic, Oleksandr Mosendz
-
Publication number: 20200043538Abstract: A perpendicular spin orbit torque MRAM memory cell comprises a magnetic tunnel junction that includes a free layer in a plane, a ferromagnetic layer and a spacer layer between the ferromagnetic layer and the free layer. The free layer comprises a switchable direction of magnetization perpendicular to the plane. The ferromagnetic layer is configured to generate perpendicularly polarized spin current in response to an electrical current through the ferromagnetic layer and inject the perpendicularly polarized spin current through the spacer layer into the free layer to change the direction of magnetization of the free layer.Type: ApplicationFiled: December 12, 2018Publication date: February 6, 2020Applicant: SANDISK TECHNOLOGIES LLCInventors: Goran Mihajlovic, Oleksandr Mosendz
-
Publication number: 20170133588Abstract: Embodiments disclosed herein generally relate to an electrode structure for a resistive random access memory (ReRAM) device cell which focuses the electric field at a center of the cell and methods for making the same. As such, a non-uniform metallic electrode may be deposited onto the ReRAM device which is subsequently exposed to an oxidation or nitrogenation process during cell fabrication. The electrode structure may be conical or pyramid shaped, and comprise at least one layer comprising a first material and a second material, wherein the concentration of the first material and the second material are varied based on location within the electrode. A metal electrode profile is formed which favors the center of the cell as the location with the greatest electric field. As such, size scaling and reliability of the non-volatile memory component are each increased.Type: ApplicationFiled: November 6, 2015Publication date: May 11, 2017Inventors: Daniel BEDAU, Jeffrey Robinson CHILDRESS, Oleksandr MOSENDZ, John C. READ, Derek STEWART
-
Patent number: 9558777Abstract: According to one embodiment, a magnetic recording medium includes: a substrate, a seed layer positioned above the substrate, and a magnetic recording layer structure positioned above the seed layer. The magnetic recording layer structure includes: a first magnetic recording layer having a plurality of FePtCu magnetic grains and a first segregant, and a second magnetic recording layer positioned above the first magnetic recording layer, the second magnetic recording layer having a plurality of FePt magnetic grains and a second segregant, where a Curie temperature of the first magnetic recording layer is lower than a Curie temperature of the second magnetic recording layer.Type: GrantFiled: November 26, 2014Date of Patent: January 31, 2017Assignee: HGST Netherlands B.V.Inventors: Olav Hellwig, Shikha Jain, Oleksandr Mosendz, Hans J. Richter, Dieter K. Weller
-
Patent number: 9472228Abstract: A magnetic medium for perpendicular magnetic data recording having improved corrosion characteristics and reduced surface roughness. The magnetic medium includes an under-layer and a perpendicular magnetic recording layer formed over the under-layer. The under-layer can be formed of MgO and has an oxygen concentration that is greater at the perpendicular magnetic recording layer than it is away from the perpendicular magnetic recording layer.Type: GrantFiled: May 28, 2013Date of Patent: October 18, 2016Assignee: HGST Netherlands B.V.Inventors: Akemi Hirotsune, Ikuko Takekuma, Hiroyuki Matsumoto, Oleksandr Mosendz
-
Patent number: 9443545Abstract: According to one embodiment, a magnetic medium includes a plasmonic underlayer having an Au alloy, where the Au alloy includes one or more alloying components that are substantially immiscible in Au; and a magnetic recording layer above the plasmonic underlayer. According to another embodiment, a magnetic medium, includes a multilayered plasmonic underlayer; and a magnetic recording layer above the multilayered plasmonic underlayer.Type: GrantFiled: December 24, 2013Date of Patent: September 13, 2016Assignee: HGST Netherlands B.V.Inventors: Oleksandr Mosendz, Vijay P. S. Rawat, Dieter K. Weller
-
Patent number: 9361926Abstract: A method for etching a media is disclosed. A first magnetic layer comprising grains is deposited with a segregant such that a portion of the first segregant covers a top surface of the grains of the first magnetic layer and a second portion of the first segregant separates the grains of the first magnetic layer. The first segregant is etched to remove the portion of the first segregant that covers the top surface of the grains.Type: GrantFiled: May 10, 2013Date of Patent: June 7, 2016Assignee: HGST Netherlands B.V.Inventors: Qing Dai, Oleksandr Mosendz, Simone Pisana, James Reiner, Hans Richter, Franck Rose, Dieter Weller
-
Publication number: 20160148632Abstract: According to one embodiment, a magnetic recording medium includes: a substrate, a seed layer positioned above the substrate, and a magnetic recording layer structure positioned above the seed layer. The magnetic recording layer structure includes: a first magnetic recording layer having a plurality of FePtCu magnetic grains and a first segregant, and a second magnetic recording layer positioned above the first magnetic recording layer, the second magnetic recording layer having a plurality of FePt magnetic grains and a second segregant, where a Curie temperature of the first magnetic recording layer is lower than a Curie temperature of the second magnetic recording layer.Type: ApplicationFiled: November 26, 2014Publication date: May 26, 2016Applicant: HGST NETHERLANDS B.V.Inventors: Olav Hellwig, Shikha Jain, Oleksandr Mosendz, Hans J. Richter, Dieter K. Weller
-
Patent number: 9324353Abstract: In one embodiment, a magnetic media suitable for HAMR recording includes a recording layer having first and second magnetic layers. The first magnetic layer has a first segregant between magnetic grains thereof, the first segregant being primarily C. Moreover, the second magnetic layer is formed above the first magnetic layer. The second magnetic layer has a second segregant between magnetic grains thereof, the second segregant being primarily C and a second component. Additional systems and methods are also described herein.Type: GrantFiled: November 19, 2013Date of Patent: April 26, 2016Assignee: HGST Netherlands B.V.Inventors: Olav Hellwig, Oleksandr Mosendz, Simone Pisana, Dieter K. Weller
-
Publication number: 20160099017Abstract: According to one embodiment, a magnetic recording medium includes a substrate, and a magnetic recording layer structure positioned above the substrate, the magnetic recording layer structure including: a first magnetic recording layer having a first plurality of magnetic grains surrounded by a first segregant; a second magnetic recording layer positioned above the first magnetic recording layer, the second magnetic recording layer having a second plurality of magnetic grains surrounded by a second segregant; and a third magnetic recording layer positioned above the second magnetic recording layer, the third magnetic recording layer having a third plurality of magnetic grains surrounded by a third segregant, where at least the first segregant is primarily a combination of carbon and a second component, and where the second segregant is primarily carbon.Type: ApplicationFiled: October 2, 2014Publication date: April 7, 2016Inventors: Olav Hellwig, Oleksandr Mosendz, Dieter K. Weller
-
Patent number: 9280996Abstract: An “all optical switching” (AOS) magnetic recording system, i.e., one that does not require a magnetic field to reverse the magnetization in the magnetic recording media, uses a FeMnPt L10 alloy as the magnetic media. A FeMnPt alloy, with appropriate amounts of Mn, will have high magneto-crystalline anisotropy, but also ferrimagnetic spin alignment for triggering AOS. The combination of high magneto-crystalline anisotropy and ferrimagnetic spin configuration enables the FeMnPt media to function as magnetic media whose magnetization can be switched solely by polarized laser pulses. The FeMnPt media for may be a single layer with or without any segregants. Alternatively, the FeMnPt media may be a multilayered recording layer comprising alternating layers of FePt and MnPt L10 ordered alloys. The segregant-free embodiments of the FeMnPt material may be patterned to form bit-patterned-media (BPM).Type: GrantFiled: December 13, 2013Date of Patent: March 8, 2016Assignee: HGST Netherlands B.V.Inventors: Olav Hellwig, Oleksandr Mosendz, Dieter K. Weller
-
Publication number: 20150179204Abstract: According to one embodiment, a magnetic medium includes a plasmonic underlayer having an Au alloy, where the Au alloy includes one or more alloying components that are substantially immiscible in Au; and a magnetic recording layer above the plasmonic underlayer. According to another embodiment, a magnetic medium, includes a multilayered plasmonic underlayer; and a magnetic recording layer above the multilayered plasmonic underlayer.Type: ApplicationFiled: December 24, 2013Publication date: June 25, 2015Applicant: HGST NETHERLANDS B.V.Inventors: Oleksandr Mosendz, Vijay P.S. Rawat, Dieter K. Weller
-
Publication number: 20150170696Abstract: An “all optical switching” (AOS) magnetic recording system, i.e., one that does not require a magnetic field to reverse the magnetization in the magnetic recording media, uses a FeMnPt L10 alloy as the magnetic media. A FeMnPt alloy, with appropriate amounts of Mn, will have high magneto-crystalline anisotropy, but also ferrimagnetic spin alignment for triggering AOS. The combination of high magneto-crystalline anisotropy and ferrimagnetic spin configuration enables the FeMnPt media to function as magnetic media whose magnetization can be switched solely by polarized laser pulses. The FeMnPt media for may be a single layer with or without any segregants. Alternatively, the FeMnPt media may be a multilayered recording layer comprising alternating layers of FePt and MnPt L10 ordered alloys. The segregant-free embodiments of the FeMnPt material may be patterned to form bit-patterned-media (BPM).Type: ApplicationFiled: December 13, 2013Publication date: June 18, 2015Applicant: HGST Netherlands B.V.Inventors: Olav Hellwig, Oleksandr Mosendz, Dieter K. Weller
-
Publication number: 20150138939Abstract: In one embodiment, a magnetic media suitable for HAMR recording includes a recording layer having first and second magnetic layers. The first magnetic layer has a first segregant between magnetic grains thereof, the first segregant being primarily C. Moreover, the second magnetic layer is formed above the first magnetic layer. The second magnetic layer has a second segregant between magnetic grains thereof, the second segregant being primarily C and a second component. Additional systems and methods are also described herein.Type: ApplicationFiled: November 19, 2013Publication date: May 21, 2015Applicant: HGST Netherlands B.V.Inventors: Olav Hellwig, Oleksandr Mosendz, Simone Pisana, Dieter K. Weller
-
Publication number: 20140355156Abstract: A magnetic medium for perpendicular magnetic data recording having improved corrosion characteristics and reduced surface roughness. The magnetic medium includes an under-layer and a perpendicular magnetic recording layer formed over the under-layer. The under-layer can be formed of MgO and has an oxygen concentration that is greater at the perpendicular magnetic recording layer than it is away from the perpendicular magnetic recording layer.Type: ApplicationFiled: May 28, 2013Publication date: December 4, 2014Applicant: HGST Netherlands B.V.Inventors: Akemi Hirotsune, Ikuko Takekuma, Hiroyuki Matsumoto, Oleksandr Mosendz
-
Publication number: 20140332496Abstract: A method for etching a media is disclosed. A first magnetic layer comprising grains is deposited with a segregant such that a portion of the first segregant covers a top surface of the grains of the first magnetic layer and a second portion of the first segregant separates the grains of the first magnetic layer. The first segregant is etched to remove the portion of the first segregant that covers the top surface of the grains.Type: ApplicationFiled: May 10, 2013Publication date: November 13, 2014Applicant: HGST Netherlands B.V.Inventors: Qing Dai, Oleksandr Mosendz, Simone Pisana, James Reiner, Hans Richter, Franck Rose, Dieter Weller