Patents by Inventor John W. Gregory
John W. Gregory 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).
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Patent number: 9995328Abstract: A kit includes a furniture module bracket and a furniture leg. The furniture module bracket has a flange defining a furniture leg attachment opening. Protrusions are attached to the flange to define a keyway between adjoining protrusions. One of the protrusions defines a protrusion aperture. The furniture leg comprises a furniture leg bracket attached to a support member. The furniture leg bracket defines keys which can pass through the keyways. At least one of the keys defines a key aperture. The furniture leg can be attached to the furniture module by (i) inserting the furniture leg bracket into the furniture leg attachment opening, (ii) rotating the support member until the keys are no longer aligned with the keyways and (iii) securing the furniture module bracket to the furniture leg bracket with a fastener disposed within an aligned key aperture and a protrusion aperture.Type: GrantFiled: October 20, 2015Date of Patent: June 12, 2018Assignee: VIRCO MFG. CORPORATIONInventor: John W. Gregory
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Publication number: 20170108022Abstract: A kit includes a furniture module bracket and a furniture leg. The furniture module bracket has a flange defining a furniture leg attachment opening. Protrusions are attached to the flange to define a keyway between adjoining protrusions. One of the protrusions defines a protrusion aperture. The furniture leg comprises a furniture leg bracket attached to a support member. The furniture leg bracket defines keys which can pass through the keyways. At least one of the keys defines a key aperture. The furniture leg can be attached to the furniture module by (i) inserting the furniture leg bracket into the furniture leg attachment opening, (ii) rotating the support member until the keys are no longer aligned with the keyways and (iii) securing the furniture module bracket to the furniture leg bracket with a fastener disposed within an aligned key aperture and a protrusion aperture.Type: ApplicationFiled: October 20, 2015Publication date: April 20, 2017Inventor: John W. Gregory
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Patent number: 6541383Abstract: An arrangement for planarizing a surface of a semiconductor wafer. The arrangement includes a planarizing member having a planarizing surface configured to be (i) positioned in contact with and (ii) moved relative to the surface of the semiconductor wafer so as to remove material from the surface of the semiconductor wafer such that the surface of the semiconductor wafer is planarized. The arrangement also includes an adherence promoting ligand chemically bonded to the planarizing surface of the planarizing member. The arrangement further includes an abrasion particle chemically bonded to the adherence promoting ligand such that the abrasion particle is attached to the planarizing surface of the planarizing member. The arrangement also includes a conditioning bar having a conditioning portion positioned in contact with a wafer track defined on the planarizing member. The conditioning portion is configured so that the conditioning portion extends completely across the wafer track.Type: GrantFiled: June 29, 2000Date of Patent: April 1, 2003Assignee: LSI Logic CorporationInventors: Derryl D. J. Allman, John W. Gregory
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Patent number: 6528389Abstract: This invention comprises an improved method of planarizing, an integrated circuit formed onto a semiconductor substrate and the planarized semiconductor substrate. Improved planarity is accomplished through the use a first and second stop layer separated by a filler layer. A first stop layer is used to define active and trench regions. A filler layer is then applied over the surface of the substrate and a second stop layer is applied on top of the filler layer. The second stop layer is patterned through etching. The pattern etched into the second stop layer is used to control chemical mechanical polishing that planarizes the surface. Patterns can be a reverse image of an active mask or a continuous pattern. In addition CMP can be used to create a condition of equilibrium planarity before the second stop layer is applied. The stop layers can comprise polysilicon, silicon nitride, or another material that is harder than a dielectric oxide material used as filler material.Type: GrantFiled: December 17, 1998Date of Patent: March 4, 2003Assignee: LSI Logic CorporationInventors: Derryl D. J. Allman, John W. Gregory
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Patent number: 6354908Abstract: A method of planarizing a first side of a semiconductor wafer with a polishing system includes the step of polishing the first side of the wafer in order to remove material from the wafer. The method also includes the step of moving a lens of a confocal optical system between a number of lens positions so as to maintain focus on the first side of the wafer during the polishing step. The method further includes the step of determining a rate-of-movement value based on movement of the lens during the moving step. Moreover, the method includes the step of stopping the polishing step if the rate-of-movement value has a predetermined relationship with a movement threshold value. An apparatus for polishing a first side of a semiconductor wafer is also disclosed.Type: GrantFiled: January 4, 2001Date of Patent: March 12, 2002Assignee: LSI Logic Corp.Inventors: Derryl D. J. Allman, David W. Daniel, John W. Gregory
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Patent number: 6316276Abstract: A method of planarizing a semiconductor that includes (i) a substrate material, (ii) a first reflective substance positioned on the substrate material, (iii) an intermediate material positioned on the first reflective substance, wherein a channel is defined in a structure which includes the substrate, the first reflective substance, and the intermediate material, and (iv) a second reflective substance positioned on the intermediate material and in the channel is disclosed.Type: GrantFiled: December 17, 1998Date of Patent: November 13, 2001Assignee: LSI Lgoic CorporationInventors: John W. Gregory, Derryl D. J. Allman
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Publication number: 20010021622Abstract: A method of planarizing a first side of a semiconductor wafer with a polishing system includes the step of polishing the first side of the wafer in order to remove material from the wafer. The method also includes the step of moving a lens of a confocal optical system between a number of lens positions so as to maintain focus on the first side of the wafer during the polishing step. The method further includes the step of determining a rate-of-movement value based on movement of the lens during the moving step. Moreover, the method includes the step of stopping the polishing step if the rate-of-movement value has a predetermined relationship with a movement threshold value. An apparatus for polishing a first side of a semiconductor wafer is also disclosed.Type: ApplicationFiled: January 4, 2001Publication date: September 13, 2001Inventors: Derryl D.J. Allman, David W. Daniel, John W. Gregory
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Patent number: 6284586Abstract: The present invention relates to a semiconductor device, preferably a capacitor, and a method of forming the same. The method adds only a single additional masking step to the the fabrication process and reduces problems relating to alignment of various layers. A relatively thick insulation layer is formed over a bottom electrode. An opening having a sidewall that is etched in the insulation layer using a mask to expose a portion of the bottom electrode. Once the mask is removed, a dielectric layer and conductive layer are then sequentially deposited over the entire structure, including sidewalls. Thereafter, chemical-mechanical polishing is used to remove portions of the conductive layer and the dielectric layer so that the conductive layer and dielectric layer which remains forms, for example, the top electrode and dielectric layer of the integrated circuit capacitor.Type: GrantFiled: November 1, 1999Date of Patent: September 4, 2001Assignee: LSI Logic CorporationInventors: John J. Seliskar, Derryl D. J. Allman, John W. Gregory, James P. Yakura, Dim Lee Kwong
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Patent number: 6241847Abstract: A method of polishing a first layer of a semiconductor wafer down to a second layer of the semiconductor wafer is disclosed. One step of the method includes polishing the first layer of the semiconductor wafer with a polishing surface having a chemical slurry positioned thereon. The polishing step causes an infrared spectrum to be emitted through the semiconductor wafer. Another step of the method includes detecting a rate of change of intensity level of the infrared spectrum and generating a control signal in response thereto. The method also includes halting the polishing step in response to generation of the control signal. Polishing systems are also disclosed which determine a polishing endpoint for a semiconductor wafer based upon an infrared spectrum generated due to a chemical slurry reacting with the semiconductor wafer.Type: GrantFiled: June 30, 1998Date of Patent: June 5, 2001Assignee: LSI Logic CorporationInventors: Derryl D. J. Allman, David W. Daniel, John W. Gregory
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Patent number: 6201253Abstract: A method of planarizing a first side of a semiconductor wafer with a polishing system includes the step of polishing the first side of the wafer in order to remove material from the wafer. The method also includes the step of moving a lens of a confocal optical system between a number of lens positions so as to maintain focus on the first side of the wafer during the polishing step. The method further includes the step of determining a rate-of-movement value based on movement of the lens during the moving step. Moreover, the method includes the step of stopping the polishing step if the rate-of-movement value has a predetermined relationship with a movement threshold value. An apparatus for polishing a first side of a semiconductor wafer is also disclosed.Type: GrantFiled: October 22, 1998Date of Patent: March 13, 2001Assignee: LSI Logic CorporationInventors: Derryl D. J. Allman, David W. Daniel, John W. Gregory
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Patent number: 6168502Abstract: The present invention provides a method and apparatus for conditioning a polishing pad in which slurry is directed under pressure at the polishing pad. Additionally, energy (i.e., ultrasonic energy) may be added to the slurry as it is directed towards the polishing pad, wherein embedded material in the polishing pad is removed or dislodged.Type: GrantFiled: December 14, 1998Date of Patent: January 2, 2001Assignee: LSI Logic CorporationInventors: Derryl D. J. Allman, John W. Gregory
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Patent number: 6121147Abstract: A method of planarizing a semiconductor wafer to a distance from a semiconductor substrate of the wafer is disclosed. The method includes the step of forming in the wafer a metallic reporting substance that is at the predetermined distance from the substrate of the wafer. The method also includes the step of polishing a first side of the wafer in order to remove material from the wafer. The method further includes the step of utilizing an atomic absorption spectroscopic technique to detect the presence of the metallic reporting substance in the material removed from the wafer. Moreover, the method includes the step of terminating the polishing step in response to the detection of the metallic reporting substance. An associated apparatus for polishing a semiconductor wafer down to a metallic reporting substance of the wafer is also described.Type: GrantFiled: December 11, 1998Date of Patent: September 19, 2000Assignee: LSI Logic CorporationInventors: David W. Daniel, John W. Gregory, Derryl D. J. Allman
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Patent number: 6115233Abstract: The present invention relates to a semiconductor device, preferably a capacitor, and a method of forming the same. The method adds only a single additional masking step to the fabrication process and reduces problems relating to alignment of various layers. A relatively thick insulation layer is formed over a bottom electrode. An opening having a sidewall that is etched in the insulation layer using a mask to expose a portion of the bottom electrode. Once the mask is removed, a dielectric layer and conductive layer are then sequentially deposited over the entire structure, including sidewalls. Thereafter, chemical-mechanical polishing is used to remove portions of the conductive layer and the dielectric layer so that the conductive layer and dielectric layer which remains forms, for example, the top electrode and dielectric layer of the integrated circuit capacitor.Type: GrantFiled: June 28, 1996Date of Patent: September 5, 2000Assignee: LSI Logic CorporationInventors: John J. Seliskar, Derryl D. J. Allman, John W. Gregory, James P. Yakura, Dim Lee Kwong
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Patent number: 5868608Abstract: The present invention provides a method and apparatus for conditioning a polishing pad in which slurry is directed under pressure at the polishing pad. Additionally, energy (i.e., ultrasonic energy) may be added to the slurry as it is directed towards the polishing pad, wherein embedded material in the polishing pad is removed or dislodged.Type: GrantFiled: August 13, 1996Date of Patent: February 9, 1999Assignee: LSI Logic CorporationInventors: Derryl D.J. Allman, John W. Gregory
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Patent number: 5809436Abstract: An automatic throttle adjustor system for a power boat which is operable to return a carburetor throttle valve to an idle setting from a user-selected setting when a sensor mounted on a bottom of the boat is about to leave the water, and which is operable to return the throttle valve to the user selected setting from the idle setting when the sensor is again submerged in the water. The system includes the sensor, a controller, an actuator, and a throttle linkage. The sensor supplies signals to the controller indicative of whether the sensor is submerged or airborne. The controller uses the signals supplied by the sensor to switch the actuator between a normal, activated state, in which the throttle valve is at the user-selected setting, to a deactivated state, in which the throttle is moved to the idle setting. The throttle linkage includes an element which is in a first position when the actuator is in the activated state and which moves to a second position when the actuator is deactivated.Type: GrantFiled: January 19, 1996Date of Patent: September 15, 1998Inventor: John W. Gregory
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Patent number: 5559733Abstract: A ferroelectric memory includes a constant voltage source, a capacitor having first and second electrodes, and a transistor having a gate. A switch alternately connects the gate of the transistor to the first electrode and the constant voltage source. In another embodiment, there are two ferroelectric transistors, and the first electrode of each capacitor is connected both to the gate of the transistor and to a voltage source external of the memory.Type: GrantFiled: June 7, 1995Date of Patent: September 24, 1996Assignees: Symetrix Corporation, Olympus Optical Co., Ltd.Inventors: Larry D. McMillan, Takashi Mihara, Hiroyuki Yoshimori, John W. Gregory, Carlos A. Paz de Araujo
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Patent number: 5523964Abstract: An integrated circuit non-volatile, non-destructive read-out memory unit includes a ferroelectric capacitor having first and second electrodes, a capacitance Cf, and an area Af, and a transistor having a gate, a source and a drain forming a gate capacitor having an area Ag and a gate capacitance Cg, a gate overlap b, and a channel depth a, with the capacitor first electrode connected to the gate of the transistor. The ferroelectric material has a dielectric constant .epsilon.f and the gate insulator has a dielectric constant .epsilon.g. A source of a constant reference voltage is connectable to the first electrode. A bit line connects to the second electrode. In one embodiment the first electrode and gate are the same conductive member. In another embodiment the second electrode and the gate are the same conductive member and the first electrode is formed by extensions of the transistor source and drains underlying the gate, with the ferroelectric material between the source and drain extensions and the gate.Type: GrantFiled: April 7, 1994Date of Patent: June 4, 1996Assignees: Symetrix Corporation, Olympus Optical Co., Ltd.Inventors: Larry D. McMillan, Takashi Mihara, Hiroyuki Yoshimori, John W. Gregory, Carlos A. Paz de Araujo