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Wafer Fabrication Monitoring/Control System and Method
Patent relating to systems and methods for monitoring and testing patterning processes including etching, cleaning, and depositing of low k and ultra-low k dielectrics for semiconductor technologies.
Date:
March 15, 2012
Creator:
Chen, Jin-Jian & Chyan, Oliver M. R.
System:
The UNT Digital Library
Methodology for Nanoscale Technology Based Mixed-Signal System Design
Patent relating to nanoscale technology based mixed-signal system design.
Date:
June 27, 2013
Creator:
Mohanty, Saraju P. & Kougianos, Elias
System:
The UNT Digital Library
Methods and Devices for Electromagnetically Tuning Acoustic Media
Patent relating to methods and devices for electromagnetically tuning acoustic media.
Date:
May 2, 2012
Creator:
Neogi, Arup & Walker, Ezekiel
System:
The UNT Digital Library
Multinetwork Nerve Cell Assay Platform with Parallel Recording Capability
Patent relating to a multinetwork nerve cell assay platform with parallel recording capability.
Date:
September 12, 2007
Creator:
Gross, Guenter W.
System:
The UNT Digital Library
Metal Ablation in Supersonic Expansion Gas Coupled to an Ion Mass Filter
Patent relating to metal ablation in supersonic expansion gas coupled to an ion mass filter.
Date:
December 1, 2011
Creator:
Verbeck, Guido F.
System:
The UNT Digital Library
Methods and Systems for Indoor Navigation
Patent relating to methods and systems for indoor navigation.
Date:
October 13, 2011
Creator:
Dantu, Ram
System:
The UNT Digital Library
An Aqueous Dispersion of Hydrogel Nanoparticles with Inverse Thermoreversible Gelation
Patent relating to an aqueous dispersion of hydrogel nanoparticles with inverse thermoreversible gelation.
Date:
December 9, 2004
Creator:
Hu, Zhibing & Xia, Xiaohu
System:
The UNT Digital Library
Solid Sorbents for Removal of Carbon Dioxide from Gas Streams at Low Temperatures
New low-cost CO2 sorbents are provided that can be used in large-scale gas-solid processes. A new method is provided for making these sorbents that involves treating substrates with an amine and/or an ether so that the amine and/or ether comprise at least 50 wt. percent of the sorbent. The sorbent acts by capturing compounds contained in gaseous fluids via chemisorption and/or physisorption between the unit layers of the substrate's lattice where the polar amine liquids and solids and/or polar ether liquids and solids are located. The method eliminates the need for high surface area supports and polymeric materials for the preparation of CO2 capture systems, and provides sorbents with absorption capabilities that are independent of the sorbents' surface areas. The sorbents can be regenerated by heating at temperatures in excess of 35 degrees C.
Date:
June 21, 2005
Creator:
Sirwardane, Ranjani V.
System:
The UNT Digital Library
Apparatus and Method for Inducing Electrical Property Changes in Carbon Nanotubes
Patent relating to an apparatus and method for inducing electrical property changes in carbon nanotubes.
Date:
September 21, 2004
Creator:
Allara, David L., 1937-; Chen, Min; Henley, Donald E.; Imholt, Timothy & Roberts, James A.
System:
The UNT Digital Library
Low Temperature Sorbents for Removal of Sulfur Compounds from Fluid Feed Streams
A sorbent material is provided comprising a material reactive with sulfur, a binder unreactive with sulfur and an inert material, wherein the sorbent absorbs the sulfur at temperatures between 30 and 200 C. Sulfur absorption capacity as high as 22 weight percent has been observed with these materials.
Date:
June 1, 2004
Creator:
Siriwardane, Ranjani
System:
The UNT Digital Library
Method for removal of mercury from various gas streams
The invention provides for a method for removing elemental mercury from a fluid, the method comprising irradiating the mercury with light having a wavelength of approximately 254 nm. The method is implemented in situ at various fuel combustion locations such as power plants and municipal incinerators.
Date:
June 10, 2003
Creator:
Granite, E. J. & Pennline, H. W.
System:
The UNT Digital Library
A Monolithic Interconnected module with a tunnel Junction for Enhanced Electrical and Optical Performance
An improved thermophotovoltaic (TPV) n/p/n device is provided. Monolithic Interconnected Modules (MIMs), semiconductor devices converting infrared radiation to electricity, have been developed with improved electrical and optical performance. The structure is an n-type emitter on a p-type base with an n-type lateral conduction layer. The incorporation of a tunnel junction and the reduction in the amount of p-type material used results in negligible parasitic absorption, decreased series resistance, increased voltage and increased active area. The novel use of a tunnel junction results in the potential for a TPV device with efficiency greater than 24%.
Date:
June 30, 1999
Creator:
Murray, Christopher Sean & Wilt, David Morgan
System:
The UNT Digital Library
Abrasion Resistant Coating and Method of making the same
An abrasion resistant coating is created by adding a ductile phase to a brittle matrix phase during spray coating where an Al-Cu-Fe quasicrystalline phase (brittle matrix) and an FeAl intermetallic (ductile phase) are combined. This composite coating produces a coating mostly of quasicrystal phase and an inter-splat layer of the FeAl phase to help reduce porosity and cracking within the coating. Coatings are prepared by plasma spraying unblended and blended quasicrystal and intermetallic powders. The blended powders contain 1, 5, 10 and 20 volume percent of the intermetallic powders. The unblended powders are either 100 volume percent quasicrystalline or 100 volume percent intermetallic; these unblended powders were studied for comparison to the others. Sufficient ductile phase should be added to the brittle matrix to transform abrasive wear mode from brittle fracture to plastic deformation, while at the same time the hardness of the composite should not be reduced below that of the original brittle phase material.
Date:
June 25, 1999
Creator:
Sordelet, Daniel J. & Besser, Matthew F.
System:
The UNT Digital Library
Vacuum Enhanced Cutaneous Biopsy Instrument
A syringe-like disposable cutaneous biopsy instrument equipped with a tubular blade at its lower end, and designed so that a vacuum is created during use, said vacuum serving to retain undeformed a plug of tissue cut from a patient's skin.
Date:
June 25, 1999
Creator:
Collins, Joseph
System:
The UNT Digital Library
Ceramic Composition for Immobilization of Actinides
Disclosed is a ceramic composition for the immobilization of actinides, particularly uranium and plutonium. The ceramic is a titanate material comprising pyrochlore, brannerite and rutile.
Date:
June 22, 1999
Creator:
Ebbinghaus, Bartley B.; Van Konynenburg, Richard A.; Vance, Eric R.; Stewart, Martin W.; Jostsons, Adam; Allender, Jeffrey S. et al.
System:
The UNT Digital Library
Process for Making a Ceramic Composition for Immobilization of Actinides
Disclosed is a process for making a ceramic composition for the immobilization of actinides, particularly uranium and plutonium. The ceramic is a titanate material comprising pyrochlore, brannerite and rutile. The process comprises oxidizing the actinides, milling the oxides to a powder, blending them with ceramic precursors, cold pressing the blend and sintering the pressed material.
Date:
June 22, 1999
Creator:
Ebbinghaus, Bartley B.; Van Konynenburg, Richard A.; Vance, Eric R.; Stewart, Martin W.; Walls, Philip A.; Brummond, William Allen et al.
System:
The UNT Digital Library
Mechanical Seal Assembly
An improved mechanical seal assembly is provided for sealing rotating shafts with respect to their shaft housings, wherein the rotating shafts are subject to substantial axial vibrations. The mechanical seal assembly generally includes a rotating sealing ring fixed to the shaft, a non-rotating sealing ring adjacent to and in close contact with the rotating sealing ring for forming an annular seal about the shaft, and a mechanical diode element that applies a biasing force to the non-rotating sealing ring by means of hemispherical joint. The alignment of the mechanical diode with respect to the sealing rings is maintained by a series of linear bearings positioned axially along a desired length of the mechanical diode. Alternative embodiments include mechanical or hydraulic amplification components for amplifying axial displacement of the non-rotating sealing ring and transferring it to the mechanical diode.
Date:
June 18, 1999
Creator:
Kotlyar, Oleg M.
System:
The UNT Digital Library
Uniform bulk Material Processing using Multimode Microwave Radiation
An apparatus for generating uniform heating in material contained in a cylindrical vessel is described. TE{sub 10}-mode microwave radiation is coupled into a cylindrical microwave transition such that microwave radiation having TE{sub 11}-, TE{sub 01}- and TM{sub 01}-cylindrical modes is excited therein. By adjusting the intensities of these modes, substantially uniform heating of materials contained in a cylindrical drum which is coupled to the microwave transition through a rotatable choke can be achieved. The use of a poor microwave absorbing insulating cylindrical insert, such as aluminum oxide, for separating the material in the container from the container walls and for providing a volume through which air is circulated is expected to maintain the container walls at room temperature. The use of layer of highly microwave absorbing material, such as SiC, inside of the insulating insert and facing the material to be heated is calculated to improve the heating pattern of the present apparatus.
Date:
June 18, 1999
Creator:
Varma, Ravi & Vaughan, Worth E.
System:
The UNT Digital Library
Automated Detection and Location of Indications in Eddy Current Signals
A computer implemented information extraction process that locates and identifies eddy current signal features in digital point-ordered signals, said signals representing data from inspection of test materials, by enhancing the signal features relative to signal noise, detecting features of the signals, verifying the location of the signal features that can be known in advance, and outputting information about the identity and location of all detected signal features.
Date:
June 30, 1998
Creator:
Brudnoy, David M.; Oppenlander, Jane E. & Levy, Arthur J.
System:
The UNT Digital Library
Free Motion Scanning System
The present invention relates to an ultrasonic scanner and method for the imaging of a part surface, the scanner comprising: a probe assembly spaced apart from the surface including at least two tracking signals for emitting electromagnetic radiation and a transmitter for emitting ultrasonic waves onto a surface in order to induce at least a portion of said waves to be reflected from the surface, at least one detector for receiving the electromagnetic radiation wherein the detector is positioned to receive said radiation from the tracking signals, an analyzing means for recognizing a three-dimensional location of the tracking signals based on said emitted electromagnetic radiation, a differential conversion means for generating an output signal representative of the waveform of the reflected waves, and a means for relating said tracking signal location with the output signal and projecting an image of the resulting data. The scanner and method are particularly useful to acquire ultrasonic inspection data by scanning the probe-over a complex part surface in an arbitrary scanning pattern.
Date:
June 18, 1998
Creator:
Sword, Charles K.
System:
The UNT Digital Library
Miniature Videoprobe Hockey Stick Delivery System
The present invention is a miniature videoprobe system having a probe termination box, a strong back, and a videoprobe housing. The videoprobe system is able to obtain images from a restricted space at least as small as 0.125 inches while producing a high quality image. The strong back has a hockey stick shape with the probe termination box connecting to the top of the handle-like portion of the hockey stick and the videoprobe housing attaching to the opposite end or nose of the hockey stick shape. The videoprobe housing has a roughly arrowhead shape with two thin steel plates sandwiching the internal components there between. The internal components are connected in series to allow for a minor dimension of the videoprobe housing of 0.110 inches. The internal components include an optics train, a CCD chip, and an electronics package. An electrical signal is transmitted from the electronics package through wiring within an internal channel of the strong back to the probe termination box. The strong back has milled into it multiple internal channels for facilitating the transfer of information, items, or devices between the probe termination box and the videoprobe housing.
Date:
June 18, 1998
Creator:
Hale, Lester R. & McMurry, Kyle M.
System:
The UNT Digital Library
Reduction of B-Integral Accumulation in Lasers
A pulsed laser is provided wherein the B-integral accumulated in the laser pulse is reduced using a semiconductor wafer. A laser pulse is generated by a laser pulse source. The laser pulse passes through a semiconductor wafer that has a negative nonlinear index of refraction. Thus, the laser pulse accumulates a negative B-integral. The laser pulse is then fed into a laser amplification medium, which has a positive nonlinear index of refraction. The laser pulse may make a plurality of passes through the laser amplification medium and accumulate a positive B-integral during a positive non-linear phase change. The semiconductor and laser pulse wavelength are chosen such that the negative B-integral accumulated in the semiconductor wafer substantially cancels the positive B-integral accumulated in the laser amplification medium. There may be additional accumulation of positive B-integral if the laser pulse passes through additional optical mediums such as a lens or glass plates. Thus , the effects of self-phase modulation in the laser pulse are substantially reduced.
Date:
June 5, 1998
Creator:
Meyerhofer, David D. & Konoplev, Oleg A.
System:
The UNT Digital Library
Improved Spatial Filter for high power Lasers
A new pinhole architecture incorporates features intended to reduce the rate of plasma generation in a spatial filter for high-energy laser pulse beams. An elongated pinhole aperture is provided in an apertured body for rejecting off-axis rays of the laser pulse beam. The internal surface of the elongated aperture has a diameter which progressively tapers from a larger entrance cross-sectional area at an inlet to a smaller output cross-sectional area at an outlet. The tapered internal surface causes off-axis rays to be refracted in a low density plasma layer that forms on the internal surface or specularly reflected at grazing incidence from the internal surface. Off-axis rays of the high-energy pulse beam are rejected by this design. The external surface of the apertured body adjacent to the larger entrance cross-sectional area at the inlet to the elongated aperture is angled obliquely with respect to the to direction of the path of the high-energy laser pulse beam to backscatter off-axis rays away from the high-energy pulse beam. The aperture is formed as a truncated cone or alternatively with a tapered square cross-section. The internal surface of the aperture is coated with an ablative material, preferably high-density material which can be deposited …
Date:
June 1, 1998
Creator:
Estabrook, Kent G.; Celliers, Peter M.; Murray, James E.; DaSilva, Luiz; MacGowan, Brian J.; Rubenchik, Alexander M. et al.
System:
The UNT Digital Library
Gas-driven microturbine
This paper describes an invention which relates to microtechnology and the fabrication process for developing microelectrical systems. It describes a means for fabricating a gas-driven microturbine capable of providing autonomous propulsion in which the rapidly moving gases are directed through a micromachined turbine to power devices by direct linkage or turbo-electric generators components in a domain ranging from tenths of micrometers to thousands of micrometers.
Date:
June 27, 1996
Creator:
Sniegowski, J. J.; Rodgers, M. S.; McWhorter, P. J.; Aeschliman, D. P. & Miller, W. M.
System:
The UNT Digital Library