Patents by Inventor Cindy Xing Qiu

Cindy Xing Qiu 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: 9276131
    Abstract: This invention teaches stress release metal electrodes for gate, drain and source in a field effect transistor and stress release metal electrodes for emitter, base and collector in a bipolar transistor. Due to the large difference in the thermal expansion coefficients between semiconductor materials and metal electrodes, significant strain and stresses can be induced in the devices during the fabrication and operation. The present invention provides metal electrode with stress release structures to reduce the strain and stresses in these devices.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: March 1, 2016
    Inventors: Ishiang Shih, Cindy Xing Qiu, Chunong Qiu, Yi-Chi Shih
  • Publication number: 20160005771
    Abstract: MMIC circuits with thin film transistors are provided without the need of grinding and etching of the substrate after the fabrication of active and passive components. Furthermore, technology for active devices based on non-toxic compound semiconductors is provided. The success in the MMIC methods and structures without substrate grinding/etching and the use of semiconductors without toxic elements for active components will reduce manufacturing time, decrease economic cost and environmental burden. MMIC structures are provided where the requirements for die or chip attachment, alignment and wire bonding are eliminated completely or minimized. This will increase the reproducibility and reduce the manufacturing time for the MMIC circuits and modules.
    Type: Application
    Filed: August 3, 2015
    Publication date: January 7, 2016
    Inventors: Ishiang Shih, Cindy Xing Qiu, Chunong Qiu, Yi-Chi Shih
  • Publication number: 20140332854
    Abstract: This invention teaches stress release metal electrodes for gate, drain and source in a field effect transistor and stress release metal electrodes for emitter, base and collector in a bipolar transistor. Due to the large difference in the thermal expansion coefficients between semiconductor materials and metal electrodes, significant strain and stresses can be induced in the devices during the fabrication and operation. The present invention provides metal electrode with stress release structures to reduce the strain and stresses in these devices.
    Type: Application
    Filed: May 10, 2013
    Publication date: November 13, 2014
    Inventors: Ishiang Shih, Cindy Xing Qiu, Chunong Qiu, Yi-Chi Shih
  • Patent number: 8852755
    Abstract: The present invention relates to oxadiazole metallic complexes. More specifically it relates to the synthesis and electronic and opto-electronic applications of oxadiazole metallic complexes having a general Formula I, wherein each of variables is defined herein.
    Type: Grant
    Filed: August 13, 2004
    Date of Patent: October 7, 2014
    Assignee: Merck Patent GmbH
    Inventors: Chunong Qiu, Steven Xiao, Cindy Xing Qiu
  • Patent number: 8759877
    Abstract: This invention teaches stress release metal electrodes for gate, drain and source in a field effect transistor and stress release metal electrodes for emitter, base and collector in a bipolar transistor. Due to the large difference in the thermal expansion coefficients between semiconductor materials and metal electrodes, significant strain and stresses can be induced in the devices during the fabrication and operation. The present invention provides metal electrode with stress release structures to reduce the strain and stresses in these devices.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: June 24, 2014
    Inventors: Ishiang Shih, Cindy Xing Qiu, Chunong Qiu, Yi-Chi Shih
  • Publication number: 20110291159
    Abstract: This invention teaches stress release metal electrodes for gate, drain and source in a field effect transistor and stress release metal electrodes for emitter, base and collector in a bipolar transistor. Due to the large difference in the thermal expansion coefficients between semiconductor materials and metal electrodes, significant strain and stresses can be induced in the devices during the fabrication and operation. The present invention provides metal electrode with stress release structures to reduce the strain and stresses in these devices.
    Type: Application
    Filed: June 1, 2010
    Publication date: December 1, 2011
    Inventors: Ishiang Shih, Cindy Xing Qiu, Chunong Qiu, Yi-Chi Shih
  • Patent number: 7277065
    Abstract: Photonic Band Gap (PBG) structures are utilized in microwave components as filters to suppress unwanted signals because they have the ability to produce a bandstop effect at certain frequency range depending on the structural dimensions. The unique property of PBG structures is due to the periodic change of the dielectric permittivity so interferences are created with the traveling electromagnetic waves. Such periodic arrangement could exist either inside of the dielectric substrate or in the ground plane of a microstrip transmission line structure. This invention provides tunable or switchable planar PBG structures, which contains lattice pattern of periodic perforations inside of the ground plane. The tuning or switching of the bandstop characteristics is achieved by depositing a conducting island surrounded by a layer of controllable thin film with variable conductivities.
    Type: Grant
    Filed: September 2, 2003
    Date of Patent: October 2, 2007
    Inventors: Jay Hsing Wu, Chunong Qiu, Cindy Xing Qiu, Ishiang Shih
  • Patent number: 7211825
    Abstract: In electronic displays or imaging units, the control of pixels is achieved by an array of transistors. These transistors are in a thin film form and arranged in a two-dimensional configuration to form switching circuits, driving circuits or even read-out circuits. In this invention, thin film transistors and circuits with indium oxide-based channel layers are provided. These thin film transistors and circuits may be fabricated at low temperatures on various substrates and with high charge carrier mobilities. In addition to conventional rigid substrates, the present thin film transistors and circuits are particularly suited for the fabrication on flexible and transparent substrates for electronic display and imaging applications. Methods for the fabrication of the thin film transistors with indium oxide-based channels are provided.
    Type: Grant
    Filed: June 14, 2004
    Date of Patent: May 1, 2007
    Inventors: Yi-Chi Shih, Cindy Xing Qiu, Ishiang Shih, Chunong Qiu
  • Patent number: 7193021
    Abstract: The present invention discloses soluble copolymers of aniline and thiophene having a general formula I. Wherein: m and n each independently represents an integer, with m?1 and n?2. R1, R2, R3, R4, R5, R6 and R7 each independently represents, hydrogen atom, or a liner or branched or cyclo aliphatic group having from 1 to 20 carbon atoms, or an aromatic group having from 5 to 30 carbon atoms, or any other functional group, but at least one among R1, R2, R3, R4, R5, R6, and R7 is not a hydrogen atom. The present invention also teaches methods for the synthesis, characterization and application of the disclosed copolymers.
    Type: Grant
    Filed: August 16, 2004
    Date of Patent: March 20, 2007
    Assignee: Organic Vision Inc
    Inventors: Steven Shuyong Xiao, Chunong Qiu, Cindy Xing Qiu
  • Patent number: 7063994
    Abstract: This invention discloses structures of organic materials-based semiconductor devices and methods for the fabrication of such devices. According to this invention, each of the devices has a first part and a second part. The first part has at least a first organic semiconductor material layer deposited on a first electrode and the second part has at least a second organic semiconductor material layer deposited on a second electrode. Said device is formed by assembling the two individual parts together. Each part maybe fabricated separately and consists of an electrode coated with semiconductor organic materials required by the function of the desired device. A schematic diagram in the FIG. 3 shows a first part (11) consisting of a first substrate (13), a first electrode (14) and at least one layer of organic materials (15); the second part (12) of the device consisting of the second substrate (16), a second electrode (17) with at least a layer of organic materials (18).
    Type: Grant
    Filed: July 11, 2003
    Date of Patent: June 20, 2006
    Assignee: Organic Vision Inc.
    Inventors: Steven Shuyong Xiao, Chunong Qiu, Cindy Xing Qiu
  • Patent number: 6949403
    Abstract: This invention discloses methods for the fabrication of organic semiconductor material-based devices under non-vacuum environment. In one embodiment, electrodes are formed by electrodeposition from an electrolyte containing ions or complexes of the electrode materials to be deposited. In another embodiment, electrodes are formed by solution processing from a solution (or ink) containing nano-particle of the electrode materials or the precursor of electrode materials to be deposited. In addition, two different modes, either layer by layer or layer to layer, are disclosed for the fabrication of organic semiconductor material-based devices, wherein all semiconductor organic materials required by the function of the desired device are deposited under an non-vacuum environment.
    Type: Grant
    Filed: July 22, 2003
    Date of Patent: September 27, 2005
    Assignee: Organic Vision Inc.
    Inventors: Steven Shuyong Xiao, Chunong Qiu, Cindy Xing Qiu
  • Patent number: 6949985
    Abstract: As the basic building block of microwave and millimeter wave units and circuits, the microwave switch must fulfill several requirements including low insertion loss, high isolation and small dimensions. For conventional electrostatically actuated microwave MEMS switches, the isolation between DC and RF is achieved using an RF choke. In this invention, a miniature electrostatically actuated microwave switch with a cantilever and employing two resistive lines on a first substrate and act as the actuation electrodes is provided. The resistive lines as the actuation electrodes according to this invention allows one to minimize the switch dimensions, to facilitate the integration and minimize the interference of the propagating microwave or millimeter wave signals.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: September 27, 2005
    Inventors: Cindy Xing Qiu, Chunong Qiu, Yi-Chi Shih
  • Patent number: 6894145
    Abstract: The present invention discloses methods to remove impurities in polymeric materials in order to improve the opto-electronic characteristics of devices fabricated from these polymers. The polymers include but not limited to polyarylenes, polyarylenevinylenes, polyaryleneethylnylene, polyfluorenes, polyanilines, polythiophenes, polypyrroles, and any conjugated co-polymers. The methods involve the selection of a scavenger or chelating agent and use it to remove metallic impurities from the polymers. The methods involve dissolving the polymer in a suitable solvent, adding a scavenger, mixing to form a scavenger, containing phase, and finally separating the scavenger containing phase from the polymer phase. According to this invention, it is preferable for the selected scavengers to have functional groups which can chemically react with metallic species and form a coordination compound that is not soluble in a selected solvent.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: May 17, 2005
    Assignee: Organic Vision Inc.
    Inventors: Steven Shuyong Xiao, Chunong Qiu, Cindy Xing Qiu
  • Patent number: 6891191
    Abstract: The present invention discloses a vertical junction structure with multi-PN channels, which provides a maximum interface between p-type and n-type materials in order to assist the charge separation, and offers continuous phases in both p- and n-type materials for charge transport in opposite directions. The present invention also provides methods for constructing the device structures. The main steps include 1) assembling a porous structure or a framework with semiconductor materials of one conduction type on a first electrode, 2) filling pores or coating the framework made from the materials in step 1 with semiconductors or precursors of conducting polymer of a opposite conduction type, 3) chemically and physically treating the system to form closed packed multi-PN channels.
    Type: Grant
    Filed: September 2, 2003
    Date of Patent: May 10, 2005
    Assignee: Organic Vision Inc.
    Inventors: Steven Xiao, Chunong Qiu, Cindy Xing Qiu
  • Publication number: 20040254336
    Abstract: The present invention discloses methods to remove impurities in polymeric materials in order to improve the opto-electronic characteristics of devices fabricated from these polymers. The polymers include but not limited to polyarylenes, polyarylenevinylenes, polyaryleneethylnylene, polyfluorenes, polyanilines, polythiophenes, polypyrroles, and any conjugated co-polymers. The methods involve the selection of a scavenger or chelating agent and use it to remove metallic impurities from the polymers. The methods involve dissolving the polymer in a suitable solvent, adding a scavenger, mixing to form a scavenger containing phase, and finally separating the scavenger containing phase from the polymer phase. According to this invention, it is preferable for the selected scavengers to have functional groups which can chemically react with metallic species and form a coordination compound that is not soluble in a selected solvent.
    Type: Application
    Filed: June 16, 2003
    Publication date: December 16, 2004
    Inventors: Steven Shuyong Xiao, Chunong Qiu, Cindy Xing Qiu
  • Patent number: 6593834
    Abstract: Miniature double-throw electromagnetic microwave switches are disclosed in this invention. In one embodiment a switch comprising an input transmission line, a first movable cantilever with a first permanent magnetic film and connecting to a first output transmission line, a second movable cantilever with a second permanent magnetic film and connecting to a second output transmission line is provided. In another embodiment, a latching function is provided to a miniature double-throw electromagnetic microwave switch by adding a permanent magnetic film to said input transmission line. In yet another embodiment, a third non-movable cantilever with a permanent magnetic film on top is added to said miniature double-throw microwave latching switch to enhance the latching mechanism.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: July 15, 2003
    Inventors: Cindy Xing Qiu, Chu-Nong Qiu, Yi-Chi Shih
  • Publication number: 20030020561
    Abstract: Miniature double-throw electromagnetic microwave switches are disclosed in this invention. In one embodiment a switch comprising an input transmission line, a first movable cantilever with a first permanent magnetic film and connecting to a first output transmission line, a second movable cantilever with a second permanent magnetic film and connecting to a second output transmission line is provided. In another embodiment, a latching function is provided to a miniature double-throw electromagnetic microwave switch by adding a permanent magnetic film to said input transmission line. In yet another embodiment, a third non-movable cantilever with a permanent magnetic film on top is added to said miniature double-throw microwave latching switch to enhance the latching mechanism.
    Type: Application
    Filed: July 30, 2001
    Publication date: January 30, 2003
    Inventors: Cindy Xing Qiu, Chu-Nong Qiu, Yi-Chi Shih
  • Patent number: 6310526
    Abstract: Miniature double-throw microwave switches are disclosed in this invention. In one embodiment a miniature double-throw electromagnetic switch for microstrip transmission lines is provided. A cantilever, which forms a part of an input transmission line, with a permanent magnetic film can be pulled down or pushed up by an applied magnetic field to make electrical contact with either one of two output transmission lines. The applied magnetic field is generated by applying a positive or negative current to a miniature electromagnetic coil mounted under the cantilevers. In another embodiment, a miniature double-throw microwave switch with two cantilevers attached to the input transmission line is disclosed for microstrip transmission lines. The magnetic polarizations of the permanent magnetic films on the two cantilevers are controlled in such a way that when a magnetic field is applied, one cantilever will be pulled downward to make electrical contact to a first output transmission line.
    Type: Grant
    Filed: September 21, 1999
    Date of Patent: October 30, 2001
    Inventors: Lap-Sum Yip, Cindy Xing Qiu, Yi-Chi Shih
  • Patent number: 6085002
    Abstract: Methods for the fabrication of dense wavelength division multiplexors (DWDM) are disclosed. In one embodiment, an array of micro membranes and an array of cavities for optical fibers are etched in a substrate. The distance between major surface of adjacent micro membranes is controlled during the etching step. Multilayer narrow band pass filters are then deposited on all micro membranes simultaneously by vacuum deposition methods. Due to the controlled separation between adjacent micro membranes, the central wavelength of transmission either increases or decreases from one membrane to another. In another embodiment, a micro machined structure containing a plurality of cavities and a slot for variable narrow band pass filter is fabricated. The variable narrow band pass filter is aligned with respect to the optical fibers to obtain a WDM.
    Type: Grant
    Filed: March 16, 1998
    Date of Patent: July 4, 2000
    Inventors: Cindy Xing Qiu, Yi-Chi Shih, Lap Sum Yip
  • Patent number: 6016092
    Abstract: Methods for the fabrication of miniature electromagnetic microwave switches are disclosed in this invention. In one embodiment, on a dielectric substrate, miniature electromagnetic switches for coplanar waveguide transmission lines are fabricated. In another embodiment, miniature electromagnetic microwave switches are fabricated for microstrip transmission lines. The miniature microwave switches are built on a dielectric substrate and are accompanied by miniature electromagnetic coils on the back of the substrate. The switch is controlled by regulating the dc current applied to the electromagnetic coil. A switch is ON when a dc controlling current is applied to the electromagnetic coil and is OFF when the controlling current is cut off. A reverse dc current may also be applied to the electromagnetic coil to repel the top electrode from the bottom electrode. The use of reverse current will prevent the possible sticking of the two electrodes, thus, reducing the switching time.
    Type: Grant
    Filed: August 10, 1998
    Date of Patent: January 18, 2000
    Inventors: Cindy Xing Qiu, Yi-Chi Shih, Lap Sum Yip