Patents by Inventor Luna H. Chiu

Luna H. Chiu 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: 8859193
    Abstract: An embodiment of the present invention provides a method of applying patterned metallization to a ceramic block comprising applying a photodefinable ink to said ceramic block; drying said ink; exposing said photodefinable ink to UV radiation through a predefined mask according to the thickness of the film to form a pattern; developing said pattern in a developer solution thereby forming a patterned ceramic block; and rinsing, drying and firing said patterned ceramic block.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: October 14, 2014
    Assignee: BlackBerry
    Inventors: Luna H. Chiu, Chen Zhang, John King, Barry Treadway, George Kang
  • Publication number: 20140022031
    Abstract: An embodiment of the present invention provides a method of applying patterned metallization to a ceramic block comprising applying a photodefinable ink to said ceramic block; drying said ink; exposing said photodefinable ink to UV radiation through a predefined mask according to the thickness of the film to form a pattern; developing said pattern in a developer solution thereby forming a patterned ceramic block; and rinsing, drying and firing said patterned ceramic block.
    Type: Application
    Filed: August 15, 2013
    Publication date: January 23, 2014
    Applicant: BLACKBERRY LIMITED
    Inventors: Luna H. Chiu, Chen Zhang, John King, Barry Treadway, George Kang
  • Patent number: 8609017
    Abstract: Electronically tunable dielectric materials having favorable properties are disclosed. The electronically tunable materials include an electronically tunable dielectric phase such as barium strontium titanate in combination with at least two additional metal oxide phases. The additional metal oxide phases may include, for example, oxides of Mg, Si, Ca, Zr, Ti and Al. The electronically tunable materials may be provided in bulk, thin film and thick film forms for use in devices such as phased array antennas, tunable filters and the like. The materials are useful in many applications, including the area of radio frequency engineering and design.
    Type: Grant
    Filed: February 17, 2007
    Date of Patent: December 17, 2013
    Assignee: BlackBerry Limited
    Inventors: Louise C. Sengupta, Xubai Zhang, Luna H. Chiu
  • Patent number: 8562899
    Abstract: Electronically tunable dielectric materials having favorable properties are disclosed. The electronically tunable materials include an electronically tunable dielectric phase such as barium strontium titanate in combination with at least two additional metal oxide phases. The additional metal oxide phases may include, for example, oxides of Mg, Si, Ca, Zr, Ti and Al. The electronically tunable materials may be provided in bulk, thin film and thick film forms for use in devices such as phased array antennas, tunable filters and the like. The materials are useful in many applications, including the area of radio frequency engineering and design.
    Type: Grant
    Filed: October 16, 2003
    Date of Patent: October 22, 2013
    Assignee: Blackberry Limited
    Inventors: Louise C. Sengupta, Xubai Zhang, Luna H. Chiu
  • Patent number: 8535875
    Abstract: An embodiment of the present invention provides a method of applying patterned metallization to a ceramic block comprising applying a photodefinable ink to said ceramic block; drying said ink; exposing said photodefinable ink to UV radiation through a predefined mask according to the thickness of the film to form a pattern; developing said pattern in a developer solution thereby forming a patterned ceramic block; and rinsing, drying and firing said patterned ceramic block.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: September 17, 2013
    Assignee: Blackberry Limited
    Inventors: Luna H. Chiu, Chen Zhang, John King, Barry Treadway, George Kang
  • Publication number: 20130011798
    Abstract: An embodiment of the present invention provides a method of applying patterned metallization to a ceramic block comprising applying a photodefinable ink to said ceramic block; drying said ink; exposing said photodefinable ink to UV radiation through a predefined mask according to the thickness of the film to form a pattern; developing said pattern in a developer solution thereby forming a patterned ceramic block; and rinsing, drying and firing said patterned ceramic block.
    Type: Application
    Filed: September 13, 2012
    Publication date: January 10, 2013
    Applicant: RESEARCH IN MOTION RF, INC.
    Inventors: Luna H. Chiu, Chen Zheng, John King, Barry Treadway, George Kang
  • Patent number: 8283108
    Abstract: An embodiment of the present invention provides a method of applying patterned metallization to a ceramic block comprising applying a photodefinable ink to said ceramic block; drying said ink; exposing said photodefinable ink to UV radiation through a predefined mask according to the thickness of the film to form a pattern; developing said pattern in a developer solution thereby forming a patterned ceramic block; and rinsing, drying and firing said patterned ceramic block.
    Type: Grant
    Filed: March 19, 2007
    Date of Patent: October 9, 2012
    Assignee: Research in Motion RF, Inc.
    Inventors: Luna H. Chiu, Chen Zhang, John King, Barry Treadway, George Kang
  • Patent number: 7297650
    Abstract: The production of low-loss, tunable composite ceramic materials with improved breakdown strengths is disclosed. The composite materials comprise ferroelectric perovskites such as barium strontium titanate or other ferroelectric perovskites combined with other phases such as low-loss silicate materials and/or other low-loss oxides. The composite materials are produced in sheet or tape form by methods such as tape casting. The composite tapes exhibit favorable tunability, low loss and tailorable dielectric properties, and can be used in various microwave devices.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: November 20, 2007
    Assignee: Paratek Microwave, Inc.
    Inventors: Luna H. Chiu, Xubai Zhang, Louise C. Sengupta
  • Patent number: 7145415
    Abstract: This invention provides a voltage tunable filter comprising an input connection point, an output connection point, and at least one circuit branch electrically coupled to the input connection point and the output connection point and including a voltage tunable dielectric varactor electrically connected to an inductor. The voltage tunable filter can be one of a low-pass, high-pass, band-pass, or band-stop filter. The varactor can include built-in DC blocking capacitors.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: December 5, 2006
    Assignee: Paratek Microwave, Inc.
    Inventors: Louise C. Sengupta, Steven C. Stowell, Yongfei Zhu, Somnath Sengupta, Luna H. Chiu, Xubai Zhang
  • Patent number: 7056468
    Abstract: The production of low-loss, tunable composite ceramic materials with improved breakdown strengths is disclosed. The composite materials comprise ferroelectric perovskites such as barium strontium titanate or other ferroelectric perovskites combined with other phases such as low-loss silicate materials and/or other low-loss oxides. The composite materials are produced in sheet or tape form by methods such as tape casting. The composite tapes exhibit favorable tunability, low loss and tailorable dielectric properties, and can be used in various microwave devices.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: June 6, 2006
    Assignee: Paratek Microwave, Inc.
    Inventors: Luna H. Chiu, Xubai Zhang, Louise C. Sengupta
  • Patent number: 6905989
    Abstract: Tunable dielectric materials including an electronically tunable dielectric ceramic and a low loss glass additive are disclosed. The tunable dielectric may comprise a ferroelectric perskovite material such as barium strontium titanate. The glass additive may comprise boron, barium, calcium, lithium, manganese, silicon, zinc and/or aluminum-containing glasses having dielectric losses of less than 0.003 at 2 GHz. The materials may further include other additives such as non-tunable metal oxides and silicates. The low loss glass additive enables the materials to be sintered at relatively low temperatures while providing improved properties such as low microwave losses and high breakdown strengths.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: June 14, 2005
    Assignee: Paratek Microwave, Inc.
    Inventors: Marion E. Ellis, Steven Wesley Winn, Luna H. Chiu
  • Patent number: 6876279
    Abstract: A tunable dielectric structure includes a first layer of dielectric material, a second layer of dielectric material positioned adjacent to the first layer of dielectric material, with the second layer of dielectric material having a dielectric constant that is less than the dielectric constant of the first layer of dielectric material, and electrodes for applying a controllable voltage across the first dielectric material, thereby controlling a dielectric constant of the first dielectric material, wherein at least one of the electrodes is positioned between the first and second layers of dielectric material. The dielectric materials can be formed in various shapes and assembled in various orientations with respect to each other. The tunable dielectric structure is used in various devices including coaxial cables, cavity antennas, microstrip lines, coplanar lines, and waveguides.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: April 5, 2005
    Assignee: Paratek Microwave, Inc.
    Inventors: Louise Sengupta, Steven C. Stowell, Yongfei Zhu, Somnath Sengupta, Luna H. Chiu, Xubai Zhang
  • Publication number: 20040227592
    Abstract: An electric communication signal block resonator, comprising a block of dielectric materials having an outside surface including a top surface, a bottom surface, and at least first and second side surfaces. The block defines at least one through-hole and each through-hole extends from an opening in the bottom surface to an opening in the top surface. Further, a metallization is deposited via a photodefinable process onto said block. The metallization includes input/output coupling metallization deposited via a photodefinable process as well as metallization of tunable varactors deposited via a photodefinable process.
    Type: Application
    Filed: December 15, 2003
    Publication date: November 18, 2004
    Inventors: Luna H. Chiu, Chen Zhang, John King, Barry Treadway, George Kang
  • Patent number: 6794960
    Abstract: A tunable dielectric structure includes a first layer of dielectric material, a second layer of dielectric material positioned adjacent to the first layer of dielectric material, with the second layer of dielectric material having a dielectric constant that is less than the dielectric constant of the first layer of dielectric material, and electrodes for applying a controllable voltage across the first dielectric material, thereby controlling a dielectric constant of the first dielectric material, wherein at least one of the electrodes is positioned between the first and second layers of dielectric material. The dielectric materials can be formed in various shapes and assembled in various orientations with respect to each other. The tunable dielectric structure is used in various devices including coaxial cables, cavity antennas, microstrip lines, coplanar lines, and waveguides.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: September 21, 2004
    Assignee: Paratek Microwave, Inc.
    Inventors: Luna H. Chiu, Yongfei Zhu, Xubai Zhang, Steven C. Stowell, Andrey Kozyrev, Somnath Sengupta, Louise Sengupta
  • Patent number: 6774077
    Abstract: Electronically tunable dielectric materials having favorable properties are disclosed. The electronically tunable materials include an electronically tunable dielectric phase such as barium strontium titanate in combination with at least two additional metal oxide phases. The additional metal oxide phases may include, for example, oxides of Mg, Si, Ca, Zr, Ti and Al. The electronically tunable materials may be provided in bulk, thin film and thick film forms for use in devices such as phased array antennas, tunable filters and the like. The materials are useful in many applications, including the area of radio frequency engineering and design.
    Type: Grant
    Filed: January 24, 2001
    Date of Patent: August 10, 2004
    Assignee: Paratek Microwave, Inc.
    Inventors: Louise C. Sengupta, Xubai Zhang, Luna H. Chiu
  • Publication number: 20040089985
    Abstract: Electronically tunable dielectric materials having favorable properties are disclosed. The electronically tunable materials include an electronically tunable dielectric phase such as barium strontium titanate in combination with at least two additional metal oxide phases. The additional metal oxide phases may include, for example, oxides of Mg, Si, Ca, Zr, Ti and Al. The electronically tunable materials may be provided in bulk, thin film and thick film forms for use in devices such as phased array antennas, tunable filters and the like. The materials are useful in many applications, including the area of radio frequency engineering and design.
    Type: Application
    Filed: October 16, 2003
    Publication date: May 13, 2004
    Inventors: Louise C. Sengupta, Xubai Zhang, Luna H. Chiu
  • Patent number: 6686814
    Abstract: A voltage tunable dielectric varactor includes a substrate having a low dielectric constant and having generally planar surface, a tunable ferroelectric layer positioned on the generally planar surface of the substrate, and first and second electrodes positioned on a surface of the tunable ferroelectric layer opposite the generally planar surface of the substrate. The first and second electrodes are separated to form a gap therebetween. The varactor includes an input for receiving a radio frequency signal and an output for delivering the radio frequency signal. A bias voltage applied to the electrodes changes the capacitance of the varactor between the input and output thereof. Phase shifters and filters that include the varactor are also described.
    Type: Grant
    Filed: August 19, 2002
    Date of Patent: February 3, 2004
    Assignee: Paratek Microwave, Inc.
    Inventors: Luna H. Chiu, Yongfei Zhu, Xubai Zhang, Steven C. Stowell, Andrey Kozyrev, Somnath Sengupta, Louise Sengupta
  • Patent number: 6683517
    Abstract: A tunable dielectric structure includes a first layer of dielectric material, a second layer of dielectric material positioned adjacent to the first layer of dielectric material, with the second layer of dielectric material having a dielectric constant that is less than the dielectric constant of the first layer of dielectric material, and electrodes for applying a controllable voltage across the first dielectric material, thereby controlling a dielectric constant of the first dielectric material, wherein at least one of the electrodes is positioned between the first and second layers of dielectric material. The dielectric materials can be formed in various shapes and assembled in various orientations with respect to each other. The tunable dielectric structure is used in various devices including coaxial cables, cavity antennas, microstrip lines, coplanar lines, and waveguides.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: January 27, 2004
    Assignee: Paratek Microwave, Inc.
    Inventors: Luna H. Chiu, Yongfei Zhu, Xubai Zhang, Steven C. Stowell, Andrey Kozyrev, Somnath Sengupta, Louise Sengupta
  • Patent number: 6683516
    Abstract: A tunable dielectric structure includes a first layer of dielectric material, a second layer of dielectric material positioned adjacent to the first layer of dielectric material, with the second layer of dielectric material having a dielectric constant that is less than the dielectric constant of the first layer of dielectric material, and electrodes for applying a controllable voltage across the first dielectric material, thereby controlling a dielectric constant of the first dielectric material, wherein at least one of the electrodes is positioned between the first and second layers of dielectric material. The dielectric materials can be formed in various shapes and assembled in various orientations with respect to each other. The tunable dielectric structure is used in various devices including coaxial cables, cavity antennas, microstrip lines, coplanar lines, and waveguides.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: January 27, 2004
    Assignee: Paratek Microwave, Inc.
    Inventors: Luna H. Chiu, Yongfei Zhu, Xubai Zhang, Steven C. Stowell, Andrey Kozyrev, Somnath Sengupta, Louise Sengupta
  • Publication number: 20030119656
    Abstract: The production of low-loss, tunable composite ceramic materials with improved breakdown strengths is disclosed. The composite materials comprise ferroelectric perovskites such as barium strontium titanate or other ferroelectric perovskites combined with other phases such as low-loss silicate materials and/or other low-loss oxides. The composite materials are produced in sheet or tape form by methods such as tape casting. The composite tapes exhibit favorable tunability, low loss and tailorable dielectric properties, and can be used in various microwave devices.
    Type: Application
    Filed: November 22, 2002
    Publication date: June 26, 2003
    Applicant: Paratek Microwave, Inc.
    Inventors: Luna H. Chiu, Xubai Zhang, Louise C. Sengupta