Patents by Inventor Deepak C. Sekar

Deepak C. Sekar 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).

  • Publication number: 20120091474
    Abstract: A light-emitting integrated wafer structure, comprising: three overlying layers, wherein each of the three overlying layers emits light at a different wavelength and wherein at least one of the three overlying layers is transferred to the light-emitting integrated wafer structure using one of atomic species implants assisted cleaving, laser lift-off, etch-back, or chemical-mechanical-polishing (CMP).
    Type: Application
    Filed: October 13, 2010
    Publication date: April 19, 2012
    Applicant: NuPGA Corporation
    Inventors: Zvi Or-Bach, Deepak C. Sekar
  • Publication number: 20120094414
    Abstract: A method for fabricating a light-emitting integrated device, comprises overlying three layers, wherein each of the three layers emits light at a different wavelength, and wherein the overlying comprises one of: performing an atomic species implantation, performing a laser lift-off, performing an etch-back, or chemical-mechanical polishing (CMP).
    Type: Application
    Filed: October 13, 2010
    Publication date: April 19, 2012
    Applicant: NuPGA Corporation
    Inventors: Zvi Or-Bach, Deepak C. Sekar
  • Publication number: 20120086067
    Abstract: A device, comprising: a first layer and a second layer wherein both said first layer and said second layer are mono-crystalline, wherein said first layer comprises first transistors, wherein said second layer comprises second transistors, wherein at least one of said second transistors substantially overlays one of said first transistors, and wherein both said first transistors and said second transistors are processed following the same lithography step.
    Type: Application
    Filed: June 30, 2011
    Publication date: April 12, 2012
    Applicant: MonolithIC 3D Inc.
    Inventors: Deepak C. Sekar, Zvi Or-Bach
  • Publication number: 20120088367
    Abstract: A method of manufacturing a semiconductor wafer, the method comprising: providing a base wafer comprising a semiconductor substrate; preparing a first monocrystalline layer comprising semiconductor regions; preparing a second monocrystalline layer comprising semiconductor regions overlying the first monocrystalline layer; and etching portions of said first monocrystalline layer and portions of said second monocrystalline layer as part of forming at least one transistor on said first monocrystalline layer.
    Type: Application
    Filed: August 26, 2011
    Publication date: April 12, 2012
    Applicant: MonolithlC 3D Inc.
    Inventors: DEEPAK C. SEKAR, ZVI OR-BACH
  • Publication number: 20120088355
    Abstract: A method of manufacturing a semiconductor wafer, the method comprising: a first monocrystalline layer comprising semiconductor regions, overlaying the first monocrystalline layer with an isolation layer; preparing a second monocrystalline layer comprising semiconductor regions overlying the isolation layer; and etching portions of the first monocrystalline layer as part of forming at least one transistor on said first monocrystalline layer.
    Type: Application
    Filed: September 27, 2011
    Publication date: April 12, 2012
    Applicant: MonolithIC 3D Inc.
    Inventors: Deepak C. Sekar, Zvi Or-Bach
  • Patent number: 8153499
    Abstract: A method of manufacturing a semiconductor wafer, the method including: providing a base wafer including a semiconductor substrate, metal layers and first alignment marks; transferring a monocrystalline layer on top of the metal layers, wherein the monocrystalline layer includes second alignment marks; and performing a lithography using at least one of the first alignment marks and at least one of the second alignment marks.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: April 10, 2012
    Assignee: MonolithIC 3D Inc.
    Inventors: Zvi Or-Bach, Deepak C. Sekar, Brian Cronquist, Israel Beinglass, Jan Lodewijk de Jong
  • Patent number: 8154904
    Abstract: A storage system and method for operating the storage system that uses reversible resistance-switching elements is described. Techniques are disclosed herein for varying programming conditions to account for different resistances that memory cells have. These techniques can program memory cells in fewer attempts, which can save time and/or power. Techniques are disclosed herein for achieving a high programming bandwidth while reducing the worst case current and/or power consumption. In one embodiment, a page mapping scheme is provided that programs multiple memory cells in parallel in a way that reduces the worst case current and/or power consumption.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: April 10, 2012
    Assignee: SanDisk 3D LLC
    Inventors: Deepak C. Sekar, Klaus Schuegraf, Roy Scheuerlein
  • Patent number: 8148728
    Abstract: A method for fabrication of 3D semiconductor devices utilizing a layer transfer and steps for forming transistors on top of a pre-fabricated semiconductor device comprising transistors formed on crystallized semiconductor base layer and metal layer for the transistors interconnections and insulation layer. The advantage of this approach is reduction of the over all metal length used to interconnect the various transistors.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: April 3, 2012
    Assignee: Monolithic 3D, Inc.
    Inventors: Zvi Or-Bach, Deepak C. Sekar, Brian Cronquist, Israel Beinglass, Jan Lodewijk de Jong
  • Patent number: 8114757
    Abstract: A method of manufacturing a semiconductor wafer, the method comprising providing a base wafer comprising a semiconductor substrate; preparing a first monocrystalline layer comprising semiconductor regions; performing a first layer transfer of the first monocrystalline layer on top of the semiconductor substrate; preparing a second monocrystalline layer comprising semiconductor regions; performing a second layer transfer of the second monocrystalline layer on top of the first monocrystalline layer; and etching portions of the first monocrystalline layer and portions of the second monocrystalline layer.
    Type: Grant
    Filed: October 11, 2010
    Date of Patent: February 14, 2012
    Assignee: MonolithIC 3D Inc.
    Inventors: Zvi Or-Bach, Deepak C. Sekar
  • Publication number: 20120032294
    Abstract: A semiconductor device comprising: a first single crystal silicon layer comprising first transistors, first alignment mark, and at least one metal layer overlying said first single crystal silicon layer, wherein said at least one metal layer comprises copper or aluminum more than other materials; a second layer overlying said at least one metal layer, said second layer comprising second transistors, second alignment mark, and a through via through said second layer, wherein said through via is a part of a connection path between said first transistors and said second transistors, wherein alignment of said through via is based on said first alignment mark and said second alignment mark and effected by a distance between said first alignment mark and said second alignment mark.
    Type: Application
    Filed: June 16, 2011
    Publication date: February 9, 2012
    Applicant: MonolithlC 3D Inc.
    Inventors: Zvi Or-Bach, Brian Cronquist, Israel Beinglass, Jan Lodewijk de Jong, Deepak C. Sekar
  • Publication number: 20120028436
    Abstract: A method of manufacturing a semiconductor wafer, the method including: providing a base wafer including a semiconductor substrate, metal layers and first alignment marks; transferring a monocrystalline layer on top of the metal layers, wherein the monocrystalline layer includes second alignment marks; and performing a lithography using at least one of the first alignment marks and at least one of the second alignment marks.
    Type: Application
    Filed: September 27, 2011
    Publication date: February 2, 2012
    Applicant: MonolithIC 3D Inc.
    Inventors: Zvi Or-Bach, Deepak C. Sekar, Brian Cronquist, Israel Beinglass, Jan Lodewijk de Jong
  • Publication number: 20120012895
    Abstract: A system includes a semiconductor device. The semiconductor device includes a first semiconductor layer comprising first transistors, wherein the first transistors are interconnected by at least one metal layer comprising aluminum or copper. The second mono-crystallized semiconductor layer includes second transistors and is overlaying the at least one metal layer, wherein the second mono-crystallized semiconductor layer is less than 150 nm in thickness, and at least one of the second transistors is an N-type transistor and at least one of the second transistors is a P-type transistor.
    Type: Application
    Filed: September 27, 2011
    Publication date: January 19, 2012
    Applicant: MonolithIC 3D Inc.
    Inventors: Zvi Or-Bach, Brian Cronquist, Israel Beinglass, Jan Lodewijk de Jong, Deepak C. Sekar, Zeev Wurman
  • Patent number: 8058137
    Abstract: A method of manufacturing a semiconductor wafer, the method including: providing a base wafer including a semiconductor substrate, metal layers and first alignment marks; transferring a monocrystalline layer on top of the metal layers, wherein the monocrystalline layer includes second alignment marks; and performing a lithography using at least one of the first alignment marks in a first direction and at least one of the second alignment marks in a second direction.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: November 15, 2011
    Assignee: Monolithic 3D Inc.
    Inventors: Zvi Or-Bach, Deepak C. Sekar, Brian Cronquist, Israel Beinglass, Jan Lodewijk de Jong
  • Publication number: 20110233617
    Abstract: A method for fabrication of 3D semiconductor devices utilizing a layer transfer and steps for forming transistors on top of a pre-fabricated semiconductor device comprising transistors formed on crystallized semiconductor base layer and metal layer for the transistors interconnections and insulation layer. The advantage of this approach is reduction of the over all metal length used to interconnect the various transistors.
    Type: Application
    Filed: March 28, 2011
    Publication date: September 29, 2011
    Applicant: MonolithIC 3D Inc.
    Inventors: Zvi Or-Bach, Deepak C. Sekar, Brian Cronquist, Israel Beinglass, Jan Lodewijk de Jong
  • Publication number: 20110233676
    Abstract: A method for fabrication of 3D semiconductor devices utilizing a layer transfer and steps for forming transistors on top of a pre-fabricated semiconductor device comprising transistors formed on crystallized semiconductor base layer and metal layer for the transistors interconnections and insulation layer. The advantage of this approach is reduction of the over all metal length used to interconnect the various transistors.
    Type: Application
    Filed: March 28, 2011
    Publication date: September 29, 2011
    Applicant: MonolithIC 3D Inc.
    Inventors: Zvi Or-Bach, Deepak C. Sekar, Brian Cronquist, Israel Beinglass, Jan Lodewijk de Jong
  • Patent number: 8026521
    Abstract: A device comprising semiconductor memories, the device comprising: a first layer and a second layer of layer-transferred mono-crystallized silicon, wherein the first layer comprises a first plurality of horizontally-oriented transistors; wherein the second layer comprises a second plurality of horizontally-oriented transistors; and wherein the second plurality of horizontally-oriented transistors overlays the first plurality of horizontally-oriented transistors.
    Type: Grant
    Filed: October 11, 2010
    Date of Patent: September 27, 2011
    Assignee: MonolithIC 3D Inc.
    Inventors: Zvi Or-Bach, Deepak C. Sekar
  • Publication number: 20110227026
    Abstract: Non-volatile storage elements having a reversible resistivity-switching element and techniques for fabricating the same are disclosed herein. The reversible resistivity-switching element may be formed by depositing an oxygen diffusion resistant material (e.g., heavily doped Si, W, WN) over the top electrode. A trap passivation material (e.g., fluorine, nitrogen, hydrogen, deuterium) may be incorporated into one or more of the bottom electrode, a metal oxide region, or the top electrode of the reversible resistivity-switching element. One embodiment includes a reversible resistivity-switching element having a bi-layer capping layer between the metal oxide and the top electrode. Fabricating the device may include depositing (un-reacted) titanium and depositing titanium oxide in situ without air brake. One embodiment includes incorporating titanium into the metal oxide of the reversible resistivity-switching element.
    Type: Application
    Filed: November 9, 2010
    Publication date: September 22, 2011
    Inventors: Deepak C. Sekar, Franz Kreupl, Raghuveer Makala, Peter Rabkin, Chu-Chen Fu, Tong Zhang
  • Publication number: 20110229990
    Abstract: During the manufacture of a set of non-volatile resistance-switching memory elements, a forming process is performed in which a voltage is applied over forming period until a conductive filament is formed in a resistance-switching layer. A heat source at a temperature of 50° C. to 150° C. is applied to expedite the forming process while reducing the required magnitude of the applied voltage. Manufacturing time and reliability are improved. After the forming process, an expedited training process can be performed in which a fixed number of cycles of voltage pulses are applied without verifying the memory elements. Subsequently, the memory elements are verified by determining their read current in an evaluation. Another fixed number of cycles of voltage pulses is applied without verifying the memory elements, if the memory elements do not pass the evaluation.
    Type: Application
    Filed: July 23, 2010
    Publication date: September 22, 2011
    Inventors: Franz Kreupl, Deepak C. Sekar
  • Publication number: 20110227024
    Abstract: A non-volatile resistance-switching memory element includes a resistance-switching element formed from a metal oxide layer having a dopant which is provided at a relatively high concentration such as 10% or greater. Further, the dopant is a cation having a relatively large ionic radius such as 70 picometers or greater, such as Magnesium, Chromium, Calcium, Scandium or Yttrium. A cubic fluorite phase lattice may be formed in the metal oxide even at room temperature so that switching power may be reduced. The memory element may be pillar-shaped, extending between first and second electrodes and being in series with a steering element such as a diode. The metal oxide layer may be deposited at the same time as the dopant. Or, using atomic layer deposition, an oxide of a first metal can be deposited, followed by an oxide of a second metal, followed by annealing to cause intermixing, in repeated cycles.
    Type: Application
    Filed: July 23, 2010
    Publication date: September 22, 2011
    Inventors: Deepak C. Sekar, Franz Kreupl
  • Publication number: 20110204316
    Abstract: A memory device in a 3-D read and write memory includes a resistance-changing layer, and a local contact resistance in series with, and local to, the resistance-changing layer. The local contact resistance is established by a junction between a semiconductor layer and a metal layer. Further, the local contact resistance has a specified level of resistance according to a doping concentration of the semiconductor and a barrier height of the junction. A method for fabricating such a memory device is also presented.
    Type: Application
    Filed: February 17, 2011
    Publication date: August 25, 2011
    Inventors: Franz Kreupl, Deepak C. Sekar