Patents by Inventor Karl A. Littau

Karl A. Littau 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: 7465665
    Abstract: In one embodiment, a method for forming a tungsten-containing material on a substrate is provided which includes forming a tungsten-containing layer by sequentially exposing a substrate to a processing gas and a tungsten-containing gas during an atomic layer deposition process, wherein the processing gas comprises a boron-containing gas and a nitrogen-containing gas, and forming a tungsten bulk layer over the tungsten-containing layer by exposing the substrate to a deposition gas comprising the tungsten-containing gas and a reactive precursor gas during a chemical vapor deposition process. In one example, the tungsten-containing layer and the tungsten bulk layer are deposited within the same processing chamber.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: December 16, 2008
    Assignee: Applied Materials, Inc.
    Inventors: Ming Xi, Ashok Sinha, Moris Kori, Alfred W. Mak, Xinliang Lu, Ken Kaung Lai, Karl A. Littau
  • Patent number: 7445315
    Abstract: A liquid drop ejector comprising a jet stack, thin film or thick film heaters formed on the surface of the jet stack, and at least one thin film or thick film temperature sensor operative to provide feedback temperature control for the thin film or thick film heater elements is provided. In one form, the liquid drop ejector also has the thin film or thick film heater elements grouped in segments that are operative to be individually controlled. In addition, in another form, the signal lines provided to the liquid drop ejector are patterned to allow for more uniform resistance over the span of the liquid drop ejector.
    Type: Grant
    Filed: November 15, 2004
    Date of Patent: November 4, 2008
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Michael Yu Tak Young, Steven A. Buhler, Scott Jong Ho Limb, Karl A. Littau, Beverly J. Russo, Scott E. Solberg, Michael C. Weisberg, Cathie J. Burke, Richard Schmachtenberg, Peter J. Nystrom, Sharon Berger, Timothy Trang, Thomas Long
  • Patent number: 7290336
    Abstract: A circuit provides energy to a plurality of piezoelectric diaphragm structures formed in a two-dimensional array. Each piezoelectric diaphragm structure includes a piezoelectric element in operational contact with at least a first side electrode and a second side electrode. A switching system includes a first connection for a first power source, for application of power to the first side electrode and a second connection for a second power source, for application of power to the second side electrode. In a first state, power appropriate for performing a poling operation of the piezoelectric material is available for application to the first electrode, and the second electrode, and in a second state, power appropriate to activate the piezoelectric material to cause operational movement of the poled piezoelectric diaphragm structure is available for application to the first electrode and the second electrode.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: November 6, 2007
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Steven A. Buhler, John S. Fitch, Meng H. Lean, Karl A. Littau
  • Publication number: 20070218688
    Abstract: In one embodiment, a method for forming a tungsten-containing material on a substrate is provided which includes forming a tungsten-containing layer by sequentially exposing a substrate to a processing gas and a tungsten-containing gas during an atomic layer deposition process, wherein the processing gas comprises a boron-containing gas and a nitrogen-containing gas, and forming a tungsten bulk layer over the tungsten-containing layer by exposing the substrate to a deposition gas comprising the tungsten-containing gas and a reactive precursor gas during a chemical vapor deposition process. In one example, the tungsten-containing layer and the tungsten bulk layer are deposited within the same processing chamber.
    Type: Application
    Filed: May 15, 2007
    Publication date: September 20, 2007
    Inventors: Ming Xi, Ashok Sinha, Moris Kori, Alfredq Mak, Xinliang Lu, Ken Lai, Karl Littau
  • Patent number: 7234214
    Abstract: A method of producing at least one thick film element, including depositing a material on a surface of at least one first substrate to form at least one thick film element structure having a thickness of approximately greater than 10 ?m to 100 ?m. Then, then the at least one thick film element structure is bonded to a second substrate, and the at least one first substrate is removed from the at least one thick film element structure using a lift-off process employing radiation energy. The lift-off process including emitting, from a radiation source, a radiation beam through the first substrate to an attachment interface formed between the first substrate and the at least one thick film element structure at the first surface of the first substrate. The first substrate being substantially transparent at the wavelength of the radiation beam, permitting the radiation beam to generate sufficient energy at the interface to break the attachment.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: June 26, 2007
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Baomin Xu, Steven A. Buhler, Michael C. Weisberg, William S. Wong, Scott E. Solberg, Karl A. Littau, John S. Fitch, Scott A. Elrod
  • Publication number: 20070117234
    Abstract: Methods are disclosed for fabricating spring structures that minimize helical twisting by reducing or eliminating stress anisotropy in the thin films from which the springs are formed through manipulation of the fabrication process parameters and/or spring material compositions. In one embodiment, isotropic internal stress is achieved by manipulating the fabrication parameters (i.e., temperature, pressure, and electrical bias) during spring material film formation to generate the tensile or compressive stress at the saturation point of the spring material. Methods are also disclosed for tuning the saturation point through the use of high temperature or the incorporation of softening metals. In other embodiments, isotropic internal stress is generated through randomized deposition (e.g., pressure homogenization) or directed deposition techniques (e.g., biased sputtering, pulse sputtering, or long throw sputtering). Cluster tools are used to separate the deposition of release and spring materials.
    Type: Application
    Filed: December 15, 2006
    Publication date: May 24, 2007
    Applicant: Xerox Corporation
    Inventors: David Fork, Scott Solberg, Karl Littau
  • Patent number: 7220673
    Abstract: In one embodiment, a method for forming a tungsten-containing material on a substrate is provided which includes forming a tungsten nucleation layer by sequentially exposing a substrate to a boron-containing gas and a tungsten-containing gas within a processing chamber during an atomic layer deposition process, and forming a tungsten bulk layer on the tungsten nucleation layer by exposing the substrate to a processing gas that contains the tungsten-containing gas and a reactive precursor gas within another processing chamber during a chemical vapor deposition process. In one example, the tungsten nucleation layer is deposited on a dielectric material, such as silicon oxide. In another example, the tungsten nucleation layer is deposited on a barrier material, such as titanium or titanium nitride. Other examples provide that the tungsten nucleation layer and the tungsten bulk layer are deposited in the same processing chamber.
    Type: Grant
    Filed: August 2, 2006
    Date of Patent: May 22, 2007
    Assignee: Applied Materials, Inc.
    Inventors: Ming Xi, Ashok Sinha, Moris Kori, Alfred W. Mak, Xinliang Lu, Ken Kaung Lai, Karl A. Littau
  • Patent number: 7176600
    Abstract: A circuit provides energy to a plurality of piezoelectric diaphragm structures formed in a two-dimensional array. Each piezoelectric diaphragm structure includes a piezoelectric element in operational contact with at least a first side electrode and a second side electrode. A switching system includes a first connection for a first power source, for application of power to the first side electrode and a second connection for a second power source, for application of power to the second side electrode. In a first state, power appropriate for performing a poling operation of the piezoelectric material is available for application to the first electrode, and the second electrode, and in a second state, power appropriate to activate the piezoelectric material to cause operational movement of the poled piezoelectric diaphragm structure is available for application to the first electrode and the second electrode.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: February 13, 2007
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Steven A. Buhler, John S. Fitch, Meng H. Lean, Karl A. Littau
  • Patent number: 7172707
    Abstract: Methods are disclosed for fabricating spring structures that minimize helical twisting by reducing or eliminating stress anisotropy in the thin films from which the springs are formed through manipulation of the fabrication process parameters and/or spring material compositions. In one embodiment, isotropic internal stress is achieved by manipulating the fabrication parameters (i.e., temperature, pressure, and electrical bias) during spring material film formation to generate the tensile or compressive stress at the saturation point of the spring material. Methods are also disclosed for tuning the saturation point through the use of high temperature or the incorporation of softening metals. In other embodiments, isotropic internal stress is generated through randomized deposition (e.g., pressure homogenization) or directed deposition techniques (e.g., biased sputtering, pulse sputtering, or long throw sputtering). Cluster tools are used to separate the deposition of release and spring materials.
    Type: Grant
    Filed: January 5, 2005
    Date of Patent: February 6, 2007
    Assignee: Xerox Corporation
    Inventors: David K. Fork, Scott Solberg, Karl A. Littau
  • Publication number: 20060264031
    Abstract: In one embodiment, a method for forming a tungsten-containing material on a substrate is provided which includes forming a tungsten nucleation layer by sequentially exposing a substrate to a boron-containing gas and a tungsten-containing gas within a processing chamber during an atomic layer deposition process, and forming a tungsten bulk layer on the tungsten nucleation layer by exposing the substrate to a processing gas that contains the tungsten-containing gas and a reactive precursor gas within another processing chamber during a chemical vapor deposition process. In one example, the tungsten nucleation layer is deposited on a dielectric material, such as silicon oxide. In another example, the tungsten nucleation layer is deposited on a barrier material, such as titanium or titanium nitride. Other examples provide that the tungsten nucleation layer and the tungsten bulk layer are deposited in the same processing chamber.
    Type: Application
    Filed: August 2, 2006
    Publication date: November 23, 2006
    Inventors: Ming Xi, Ashok Sinha, Moris Kori, Alfred Mak, Xinliang Lu, Ken Lai, Karl Littau
  • Patent number: 7118990
    Abstract: A method for producing a detection/test tape includes depositing a material onto a surface of at least one first substrate to form a plurality of element structures. Electrodes are deposited on a surface of each of the plurality of element structures, and the element structures are bonded to a second substrate, where the second substrate is conductive or has a conductive layer, and the second substrate is carried on a carrier plate. The at least one first substrate is removed from the element structures and second side electrodes are deposited on a second surface of each of the plurality of element structures. An insulative material is inserted around the element structures to electrically isolate the two substrates used to bond the element structures. A second side of the element structures is then bonded to another substrate, where the other substrate is conductive or has a conductive layer. Thereafter, the carrier plate carrying the second substrate is removed.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: October 10, 2006
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Baomin Xu, Steven A. Buhler, William S. Wong, Michael C. Weisberg, Scott E. Solberg, Karl A. Littau, Scott A. Elrod
  • Publication number: 20060211217
    Abstract: A method for producing a detection/test tape includes depositing a material onto a surface of at least one first substrate to form a plurality of element structures. Electrodes are deposited on a surface of each of the plurality of element structures, and the element structures are bonded to a second substrate, where the second substrate is conductive or has a conductive layer, and the second substrate is carried on a carrier plate. The at least one first substrate is removed from the element structures and second side electrodes are deposited on a second surface of each of the plurality of element structures. An insulative material is inserted around the element structures to electrically isolate the two substrates used to bond the element structures. A second side of the element structures is then bonded to another substrate, where the other substrate is conductive or has a conductive layer. Thereafter, the carrier plate carrying the second substrate is removed.
    Type: Application
    Filed: December 20, 2004
    Publication date: September 21, 2006
    Inventors: Baomin Xu, Steven Buhler, William Wong, Michael Weisberg, Scott Solberg, Karl Littau, Scott Elrod
  • Patent number: 7101795
    Abstract: A method and system to form a refractory metal layer on a substrate features nucleating a substrate using sequential deposition techniques in which the substrate is serially exposed to first and second reactive gases followed by forming a layer, employing vapor deposition, to subject the nucleation layer to a bulk deposition of a compound contained in one of the first and second reactive gases.
    Type: Grant
    Filed: October 3, 2000
    Date of Patent: September 5, 2006
    Assignee: Applied Materials, Inc.
    Inventors: Ming Xi, Ashok Sinha, Moris Kori, Alfred W. Mak, Xinliang Lu, Ken Kaung Lai, Karl A. Littau
  • Patent number: 7091650
    Abstract: A piezoelectric thick film element array includes at least one piezoelectric element structure having a thickness between 10 ?m to 100 ?m formed by a deposition process. The at least one piezoelectric element is patterned during the deposition process, and includes a first electrode deposited on a first surface of the piezoelectric elements structure, and a second electrode deposited on a second surface of the piezoelectric element structure. In a further embodiment, several devices are provided using a piezoelectric element or an array having a piezoelectric element structure with a thickness of between 10 ?m to 100 ?m formed by a deposition process. These devices include microfluidic ejectors, transducer arrays and catheters.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: August 15, 2006
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Baomin Xu, Steven A. Buhler, Michael C. Weisberg, William S. Wong, Scott E. Solberg, Karl A. Littau, John S. Fitch, Scott A. Elrod
  • Patent number: 7089635
    Abstract: A method of producing at least one piezoelectric element includes depositing a piezoelectric ceramic material onto a surface of a first substrate to form at least one piezoelectric element structure. Then an electrode is deposited on a surface of the at least one piezoelectric element structure. Next, the at least one piezoelectric element structure is bonded to a second substrate, the second substrate being conductive or having a conductive layer. The first substrate is then removed from the at least one piezoelectric element structure and a second side electrode is deposited on a second surface of the at least one piezoelectric element structure. A poling operation is performed to provide the at least one piezoelectric element structure with piezoelectric characteristics.
    Type: Grant
    Filed: February 25, 2003
    Date of Patent: August 15, 2006
    Assignee: Palo Alto Research Center, Incorporated
    Inventors: Baomin Xu, Steven A. Buhler, Michael C. Weisberg, William S. Wong, Scott E. Solberg, Karl A. Littau, John S. Fitch, Scott A. Elrod
  • Patent number: 7084555
    Abstract: A multi-electrode piezoelectric diaphragm structure includes a diaphragm, piezoelectric material located on the diaphragm, which is defined as having a first area, and a second area. The first area of the piezoelectric is poled in a first direction, and the second area of the piezoelectric is poled in a second direction. The poled first direction is in a Z-axis of the piezoelectric and the poled second direction is in a Radial axis of the piezoelectric. A first electrode is positioned in the first area, on the first surface, of the piezoelectric. A second electrode is positioned in the second area, on the first surface, of the piezoelectric. A third electrode is located on a second surface of the piezoelectric.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: August 1, 2006
    Assignee: Palo Alto Research Center Incorporated
    Inventors: John R. Bachellerie, Steven A. Buhler, John S. Fitch, Meng H. Lean, Karl A. Littau
  • Publication number: 20060130890
    Abstract: In accordance with one aspect of the present disclosure, a solar photovoltaic device is disclosed. The semiconductor material of the solar photovoltaic device is a heterostructure of two different binary compounds of a pair of immiscible metals. The two different binary compounds have a conduction band edge offset of greater than about 0.4 eV. The binary compound acting as the optical absorbing material of the solar photovoltaic device has a bandgap of about 1.0 eV to about 1.8 eV.
    Type: Application
    Filed: December 20, 2004
    Publication date: June 22, 2006
    Inventors: Thomas Hantschel, Karl Littau, Scott Elrod
  • Publication number: 20060112985
    Abstract: In accordance with one aspect of the present disclosure, a solar photovoltaic device is disclosed. The semiconductor material of the solar photovoltaic device is a heterostructure of two different binary compounds of the same metal. One or both of the two different binary compounds of the same metal are doped so that they have a conduction band edge offset of greater than about 0.4 eV. The binary compound acting as the optical absorbing material of the solar photovoltaic device has a bandgap of about 1.0 eV to about 1.8 eV.
    Type: Application
    Filed: December 1, 2004
    Publication date: June 1, 2006
    Inventors: Thomas Hantschel, Karl Littau, Scott Elrod
  • Patent number: 7053532
    Abstract: In accordance with one embodiment of the present application, a piezoelectric diaphragm structure includes a diaphragm, with a piezoelectric material located on the diaphragm. The piezoelectric material is being poled in a radial direction to the piezoelectric material, wherein the poling direction is in-plane with the piezoelectric material. An inter-digitated electrode grid is positioned on a first surface of the piezoelectric material, the inter-digitated electrode grid including a plurality of electrodes configured to selectively receive positive and negative voltage. The application of the positive and negative voltages generate electric fields in the piezoelectric material, at least a portion of which are in-plane with the piezoelectric material, resulting in an actuation of the piezoelectric material, causing a length change of the piezoelectric material in the Radial direction.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: May 30, 2006
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Meng H. Lean, Steven A. Buhler, John S. Fitch, Karl A. Littau
  • Publication number: 20060103695
    Abstract: A liquid drop ejector comprising a jet stack, thin film or thick film heaters formed on the surface of the jet stack, and at least one thin film or thick film temperature sensor operative to provide feedback temperature control for the thin film or thick film heater elements is provided. In one form, the liquid drop ejector also has the thin film or thick film heater elements grouped in segments that are operative to be individually controlled. In addition, in another form, the signal lines provided to the liquid drop ejector are patterned to allow for more uniform resistance over the span of the liquid drop ejector.
    Type: Application
    Filed: November 15, 2004
    Publication date: May 18, 2006
    Inventors: Michael Young, Steven Buhler, Scott Limb, Karl Littau, Beverly Russo, Scott Solberg, Michael Weisberg, Cathie Burke, Richard Schmachtenberg, Peter Nystrom, Sharon Berger, Timothy Trang, Thomas Long