Patents by Inventor Ronald Weimer

Ronald Weimer 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: 6815805
    Abstract: The present invention provides a flash memory integrated circuit and a method of fabricating the same. A tunnel dielectric in an erasable programmable read only memory (EPROM) device is nitrided with a hydrogen-bearing compound, particularly ammonia. Hydrogen is thus incorporated into the tunnel dielectric, along with nitrogen. The gate stack is etched and completed, including protective sidewall spacers and dielectric cap, and the stack lined with a barrier to hydroxyl and hydrogen species. Though the liner advantageously reduces impurity diffusion through to the tunnel dielectric and substrate interface, it also reduces hydrogen diffusion in any subsequent hydrogen anneal. Hydrogen is provided to the tunnel dielectric, however, in the prior exposure to ammonia.
    Type: Grant
    Filed: January 15, 2004
    Date of Patent: November 9, 2004
    Assignee: Micron Technology, Inc.
    Inventor: Ronald A. Weimer
  • Publication number: 20040217476
    Abstract: Systems and devices are disclosed utilizing a silicon-containing barrier layer. A semiconductor device is disclosed and includes a substrate, a gate oxide, a silicon-containing barrier layer and a gate electrode. The gate oxide is formed over the substrate. The silicon-containing barrier layer is formed over the gate oxide by causing silicon atoms of a precursor layer react with a reactive agent. The gate electrode is formed over the silicon-containing barrier layer.
    Type: Application
    Filed: June 3, 2004
    Publication date: November 4, 2004
    Inventors: Don Carl Powell, Garry Anthony Mercaldi, Ronald A. Weimer
  • Publication number: 20040183144
    Abstract: A method of adjusting the threshold voltage of semiconductor devices by incorporating nitride into the isolation layer so as to decrease the mobility of charge carriers and thereby increase the threshold voltage required to activate the device. The nitrogen incorporation method may comprise of decoupled plasma nitridization (DPN) and the DPN can be performed in-situ during gate oxide formation. The amount of threshold voltage can be varied by adjusting the DPN treatment time and processing parameters.
    Type: Application
    Filed: March 20, 2003
    Publication date: September 23, 2004
    Inventors: Kevin L. Beaman, John T. Moore, Ronald A. Weimer
  • Publication number: 20040178458
    Abstract: The invention includes methods of forming circuit devices. A metal-containing material comprising a thickness of no more than 20 Å (or alternatively comprising a thickness resulting from no more than 70 ALD cycles) is formed between conductively-doped silicon and a dielectric layer. The conductively-doped silicon can be n-type silicon and the dielectric layer can be a high-k dielectric material. The metal-containing material can be formed directly on the dielectric layer, and the conductively-doped silicon can be formed directly on the metal-containing material. The circuit device can be a capacitor construction or a transistor construction. If the circuit device is a transistor construction, such can be incorporated into a CMOS assembly. Various devices of the present invention can be incorporated into memory constructions, and can be incorporated into electronic systems.
    Type: Application
    Filed: January 13, 2004
    Publication date: September 16, 2004
    Inventors: Denise M. Eppich, Ronald A. Weimer
  • Publication number: 20040180487
    Abstract: The invention includes methods of forming circuit devices. A metal-containing material comprising a thickness of no more than 20 Å (or alternatively comprising a thickness resulting from no more than 70 ALD cycles) is formed between conductively-doped silicon and a dielectric layer. The conductively-doped silicon can be n-type silicon and the dielectric layer can be a high-k dielectric material. The metal-containing material can be formed directly on the dielectric layer, and the conductively-doped silicon can be formed directly on the metal-containing material. The circuit device can be a capacitor construction or a transistor construction. If the circuit device is a transistor construction, such can be incorporated into a CMOS assembly. Various devices of the present invention can be incorporated into memory constructions, and can be incorporated into electronic systems.
    Type: Application
    Filed: March 12, 2003
    Publication date: September 16, 2004
    Inventors: Denise M. Eppich, Ronald A. Weimer
  • Publication number: 20040178432
    Abstract: The invention includes methods of forming circuit devices. A metal-containing material comprising a thickness of no more than 20 Å (or alternatively comprising a thickness resulting from no more than 70 ALD cycles) is formed between conductively-doped silicon and a dielectric layer. The conductively-doped silicon can be n-type silicon and the dielectric layer can be a high-k dielectric material. The metal-containing material can be formed directly on the dielectric layer, and the conductively-doped silicon can be formed directly on the metal-containing material. The circuit device can be a capacitor construction or a transistor construction. If the circuit device is a transistor construction, such can be incorporated into a CMOS assembly. Various devices of the present invention can be incorporated into memory constructions, and can be incorporated into electronic systems.
    Type: Application
    Filed: January 13, 2004
    Publication date: September 16, 2004
    Inventors: Denise M. Eppich, Ronald A. Weimer
  • Patent number: 6791138
    Abstract: A composite barrier layer formed between a glass film and active regions of a memory device is disclosed. The composite barrier layer comprises an oxide layer formed by atomic deposition process and an insulating layer, for example a nitride barrier layer, formed over the oxide layer. The composite barrier layer eliminates the diffusion of impurity atoms from the glass film into the active regions of the device.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: September 14, 2004
    Assignee: Micron Technology, Inc.
    Inventors: Ronald A. Weimer, Er-Xuan Ping
  • Patent number: 6784124
    Abstract: A method for conditioning or repairing a dielectric structure of a semiconductor device structure with selectivity over an adjacent conductive or semiconductive structure of the semiconductor device structure, such as a capacitor dielectric and an adjacent bottom electrode of the capacitor. The method includes exposing the dielectric structure and at least an adjacent surface of the conductive or semiconductive structure to an oxidizing atmosphere that includes at least one oxidant and hydrogen species. The at least one hydrogen species adsorbs to a surface of the conductive or semiconductive structure so as to substantially prevent passage of the at least one oxidant into or through the conductive or semiconductive structure. The oxidant oxidizes or repairs voids or other defects that may be present in the dielectric structure. Semiconductor device structures fabricated by employing the method are also disclosed.
    Type: Grant
    Filed: March 5, 2003
    Date of Patent: August 31, 2004
    Assignee: Micron Technology, Inc.
    Inventors: Ronald A. Weimer, Don Carl Powell
  • Publication number: 20040164336
    Abstract: The invention pertains to films comprising silicon, oxygen and carbon and the use of the films in integrated circuit technology, such as capacitor constructions, DRAM constructions, semiconductive material assemblies, etching processes, and methods for forming capacitors, DRAMs and semiconductive material assemblies.
    Type: Application
    Filed: March 2, 2004
    Publication date: August 26, 2004
    Applicant: Micron Technology, Inc.
    Inventors: Ronald A. Weimer, John T. Moore
  • Publication number: 20040164335
    Abstract: A method used during the formation of a semiconductor device comprises providing a wafer substrate assembly comprising a plurality of digit line plug contact pads and capacitor storage cell contact pads which contact a semiconductor wafer. A dielectric layer is provided over the wafer substrate assembly and etched to expose the digit line plug contact pads, and a liner is provided in the opening. A portion of the digit line plug is formed, then the dielectric layer is etched again to expose the capacitor storage cell contact pads. A capacitor bottom plate is formed to contact the storage cell contact pads, then the dielectric layer is etched a third time using the liner and the bottom plate as an etch stop layer. A capacitor cell dielectric layer and capacitor top plate are formed which provide a double-sided container cell. An additional dielectric layer is formed, then the additional dielectric layer, cell top plate, and the cell dielectric are etched to expose the digit line plug portion.
    Type: Application
    Filed: February 24, 2004
    Publication date: August 26, 2004
    Inventors: Scott J. DeBoer, Ronald A. Weimer, John T. Moore
  • Publication number: 20040164344
    Abstract: The present invention provides a flash memory integrated circuit and a method of fabricating the same. A tunnel dielectric in an erasable programmable read only memory (EPROM) device is nitrided with a hydrogen-bearing compound, particularly ammonia. Hydrogen is thus incorporated into the tunnel dielectric, along with nitrogen. The gate stack is etched and completed, including protective sidewall spacers and dielectric cap, and the stack lined with a barrier to hydroxyl and hydrogen species. Though the liner advantageously reduces impurity diffusion through to the tunnel dielectric and substrate interface, it also reduces hydrogen diffusion in any subsequent hydrogen anneal. Hydrogen is provided to the tunnel dielectric, however, in the prior exposure to ammonia.
    Type: Application
    Filed: January 15, 2004
    Publication date: August 26, 2004
    Inventor: Ronald A. Weimer
  • Patent number: 6774443
    Abstract: Systems and devices are disclosed utilizing a silicon-containing barrier layer. A semiconductor device is disclosed. The semiconductor device includes a substrate, a gate oxide, a silicon-containing barrier layer and a gate electrode. The gate oxide is formed over the substrate. The silicon-containing barrier layer is formed over the gate oxide by causing silicon atoms of a precursor layer react with a reactive agent. The gate electrode is formed over the silicon-containing barrier layer. Other embodiments utilizing a barrier layer are disclosed.
    Type: Grant
    Filed: January 3, 2002
    Date of Patent: August 10, 2004
    Assignee: Micron Technology, Inc.
    Inventors: Don Carl Powell, Garry Anthony Mercaldi, Ronald A. Weimer
  • Patent number: 6762451
    Abstract: The present invention provides a method for improving the erase speed and the uniformity of erase characteristics in erasable programmable read-only memories. This result is achieved by forming polycrystalline floating gate layers with optimized grain size on a tunnel dielectric layer. Nucleation sites are formed by exposing the tunnel dielectric layer to a first set of conditions including a first temperature and a first atmosphere selected to optimize nucleation site size and distribution density across the tunnel dielectric layer. A polycrystalline floating gate layer is formed on top of the nucleation sites by exposing the nucleation sites to a second set of conditions including a second temperature and a second atmosphere selected to optimize polycrystalline grain size and distribution density across the polycrystalline floating gate layer.
    Type: Grant
    Filed: August 5, 2002
    Date of Patent: July 13, 2004
    Assignee: Micron Technology, Inc.
    Inventor: Ronald A. Weimer
  • Patent number: 6734531
    Abstract: A method for conditioning or repairing a dielectric structure of a semiconductor device structure with selectivity over an adjacent conductive or semiconductive structure of the semiconductor device structure, such as a capacitor dielectric and an adjacent bottom electrode of the capacitor. The method includes exposing the dielectric structure and at least an adjacent surface of the conductive or semiconductive structure to an oxidizing atmosphere that includes at least one oxidant and hydrogen species. The at least one hydrogen species adsorbs to a surface of the conductive or semiconductive structure so as to substantially prevent passage of the at least one oxidant into or through the conductive or semiconductive structure. The oxidant oxidizes or repairs voids or other defects that may be present in the dielectric structure. Semiconductor device structures fabricated by employing the method are also disclosed.
    Type: Grant
    Filed: March 18, 2003
    Date of Patent: May 11, 2004
    Assignee: Micron Technology, Inc.
    Inventors: Ronald A. Weimer, Don Carl Powell
  • Patent number: 6713807
    Abstract: The invention pertains to films comprising silicon, oxygen and carbon and the use of the films in integrated circuit technology, such as capacitor constructions, DRAM constructions, semiconductive material assemblies, etching processes, and methods for forming capacitors, DRAMs and semiconductive material assemblies.
    Type: Grant
    Filed: August 28, 2002
    Date of Patent: March 30, 2004
    Assignee: Micron Technology, Inc.
    Inventors: Ronald A. Weimer, John T. Moore
  • Publication number: 20040040628
    Abstract: A device for magnetically annealing magnetoresistive elements formed on wafers includes a heated chuck and a delivery mechanism for individually placing the wafers individually on the chuck one at a time. A coil is adjacent to the chuck and generates a magnetic field after the wafer is heated to a Néel temperature of an anti-ferromagnetic layer. A control system regulates the temperature of the heated chuck, the strength of the magnetic field, and a time period during which each chuck is heated to control the annealing process. The annealed elements are incorporated in the fabrication of magnetic memory devices.
    Type: Application
    Filed: August 28, 2002
    Publication date: March 4, 2004
    Inventors: Mark E. Tuttle, Ronald A. Weimer
  • Patent number: 6696336
    Abstract: A method used during the formation of a semiconductor device comprises providing a wafer substrate assembly comprising a plurality of digit line plug contact pads and capacitor storage cell contact pads which contact a semiconductor wafer. A dielectric layer is provided over the wafer substrate assembly and etched to expose the digit line plug contact pads, and a liner is provided in the opening. A portion of the digit line plug is formed, then the dielectric layer is etched again to expose the capacitor storage cell contact pads. A capacitor bottom plate is formed to contact the storage cell contact pads, then the dielectric layer is etched a third time using the liner and the bottom plate as an etch stop layer. A capacitor cell dielectric layer and capacitor top plate is formed which provides a double-sided container cell. An additional dielectric layer is formed, then the additional dielectric layer, cell top plate, and the cell dielectric are etched to expose the digit line plug portion.
    Type: Grant
    Filed: May 14, 2001
    Date of Patent: February 24, 2004
    Assignee: Micron Technology, Inc.
    Inventors: Scott J. DeBoer, Ronald A. Weimer, John T. Moore
  • Publication number: 20030216000
    Abstract: The invention includes a method of forming a programmable memory device. A tunnel oxide is formed to be supported by a semiconductor substrate. A stack is formed over the tunnel oxide. The stack comprises a floating gate, dielectric mass and control gate. The stack has a top, and has opposing sidewalls extending downwardly from the top. The dielectric mass includes silicon nitride. Silicon nitride spacers are formed along sidewalls of the stack, and a silicon nitride cap is formed over a top of the stack. The silicon nitride within the dielectric mass, cap and/or sidewall spacers is formed from trichlorosilane and ammonia.
    Type: Application
    Filed: May 17, 2002
    Publication date: November 20, 2003
    Inventors: Kevin L. Beaman, Ronald A. Weimer
  • Publication number: 20030207556
    Abstract: A conductive structure for use in a semiconductor device includes a multilayer structure. A first layer includes a material containing silicon, e.g., polysilicon and silicon germanide. A barrier layer is formed over the first layer, with the barrier layer including metal silicide or metal silicide nitride. A top conductive layer is formed over the barrier layer. The top conductive layer can include metal or metal silicide. Selective oxidation can be performed to reduce the amount of oxidation of selected materials in a structure containing multiple layers, such as the multi-layer conductive structure. The selective oxidation is performed in a single-wafer rapid thermal processing system, in which a selected ambient, including hydrogen, is used to ensure low oxidation of a selected material, such as tungsten or a metal nitride.
    Type: Application
    Filed: June 4, 2003
    Publication date: November 6, 2003
    Inventors: Ronald A. Weimer, Yongjun Jeff Hu, Pai Hung Pan, Deepa Ratakonda, James Beck, Randhir P.S. Thakur
  • Publication number: 20030160305
    Abstract: A method for conditioning or repairing a dielectric structure of a semiconductor device structure with selectivity over an adjacent conductive or semiconductive structure of the semiconductor device structure, such as a capacitor dielectric and an adjacent bottom electrode of the capacitor. The method includes exposing the dielectric structure and at least an adjacent surface of the conductive or semiconductive structure to an oxidizing atmosphere that includes at least one oxidant and hydrogen species. The at least one hydrogen species adsorbs to a surface of the conductive or semiconductive structure so as to substantially prevent passage of the at least one oxidant into or through the conductive or semiconductive structure. The oxidant oxidizes or repairs voids or other defects that may be present in the dielectric structure. Semiconductor device structures fabricated by employing the method are also disclosed.
    Type: Application
    Filed: March 18, 2003
    Publication date: August 28, 2003
    Inventors: Ronald A. Weimer, Don Carl Powell