Patents by Inventor Guo-Fu Zhou

Guo-Fu Zhou 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).

  • Publication number: 20080261384
    Abstract: A method of removing a photoresist layer is provided. An ion implantation process has been performed on the photoresist layer to transform a surface of the photoresist layer to a crust and a soft photoresist layer remains within the crust. The method includes performing a first removing step to remove the crust, such that the soft photoresist layer is exposed. Thereafter, a second removing step is performed to remove the soft photoresist layer. The first and the second removing steps are performed in difference chambers, and a temperature for performing the first removing step is lower than that for performing the second removing step and lower than a gasification temperature of a solvent in the soft photoresist layer.
    Type: Application
    Filed: April 18, 2007
    Publication date: October 23, 2008
    Applicant: UNITED MICROELECTRONICS CORP.
    Inventors: Zhi-Qiang Sun, Xi PEI, Tien-Cheng Lan, Yu-Jou Chen, Guo-Fu Zhou, Kai-Ping Huang, Hong-Siek Gan, Jian-Peng Yan, Kai YANG, Sheng ZHANG
  • Patent number: 7368223
    Abstract: A multi-stack optical data storage medium for rewritable recording by a focused laser-light beam, the medium having a substrate with deposited on aside thereof: a first recording stack comprising a phase-change type recording layer at least one further recording stack comprising a phase-change type recording layer, a transparent spacer layer adjacent each further recording stack. The further recording stack is sufficiently transmissive to ensure proper sensitivity for reading and recording in the first recording stack. For this purpose, at least one indium tin oxide layer is present in at least one of the further recording stacks. The indium tin oxide layer further ensures proper cooling behavior of the recording layer of the further recording stack in order to obtain sufficient recording performance in the farther recording stack.
    Type: Grant
    Filed: May 27, 2002
    Date of Patent: May 6, 2008
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Erwin Rinaldo Meinders, Hermanus Johannes Borg, Guo-Fu Zhou, Johannes Cornelis Norbertus Rijpers
  • Patent number: 7126577
    Abstract: The invention relates to a display device comprising electrophoretic particles, a display element comprising a pixel electrode and an associated counter electrode, between which a portion of the electrophoretic particles is present, and a controller for supplying a drive signal to the electrodes to bring the display element to a predetermined black or white state, corresponding to the image information to be displayed. In order to improve the refresh time of the display, the controller is further arranged to supply a preset signal preceding the drive signal comprising a preset pulse representing an energy which is sufficient to release the electrophoretic particles at a first position near one of the two electrodes corresponding to a black state, but is too low to enable the particles to reach a second position near the other electrode corresponding to a white state.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: October 24, 2006
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Guo-Fu Zhou, Mark Thomas Johnson, Alexander Victor Henzen, Willibrordus Jurrianus Dijkman
  • Patent number: 7126743
    Abstract: An electrophoretic display device (1) comprising one pixel (10) with an electrophoretic medium (13), electrodes (6, 7), as well as drive means (4) by which the pixels can be brought into different optical states. Some time (thold) after the application of an addressing pulse (Paddress) for setting the brightness level (Rw, Rb) of a pixel (10), a restore pulse voltage (Prestore) is applied between the electrodes (6,6?,7) for restoring the brightness level of a pixel to the set level (Rw, Rb). The restore pulse may be a set of consecutive pulses to bring the drifted brightness level even more smoothly (i.e. less perceivably) back to the original brightness level.
    Type: Grant
    Filed: February 12, 2003
    Date of Patent: October 24, 2006
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Mark Thomas Johnson, Guo-Fu Zhou, Alexander Victor Henzen, Michael Geoffrey Pitt
  • Publication number: 20050227176
    Abstract: A description is given of a rewritable optical storage medium (10) comprising a substrate (1), a first dielectric layer (2), a phase-change recording layer (3) on the basis of Ge—Sb—Te, a second dielectric layer (4), and a metal reflective layer (5). The recording layer (3) is an alloy having the composition GexSbyTez, in atom %, wherein 0<x<15, 50<y<80, 10<z<30 and x+y+z=100, and the recording layer (3) has a thickness selected from the range of 7 to 18 nm. Such a medium (10) is suitable for high data rate recording with a data rate of larger than 25 Mb/s while the recording layer (6) remains relatively thin having a relatively high optical transparency.
    Type: Application
    Filed: January 24, 2003
    Publication date: October 13, 2005
    Inventors: Guo-Fu Zhou, Johannes Rijpers, Hermanus Borg, Mark Van Schijndel
  • Publication number: 20050162377
    Abstract: The invention relates to a display device comprising electrophoretic particles, a display element comprising a pixel electrode and an associated counter electrode, between which a portion of the electrophoretic particles is present, and a controller for supplying a drive signal to the electrodes to bring the display element to a predetermined black or white state, corresponding to the image information to be displayed. In order to improve the refresh time of the display, the controller is further arranged to supply a preset signal preceding the drive signal comprising a preset pulse representing an energy which is sufficient to release the electrophoretic particles at a first position near one of the two electrodes corresponding to a black state, but is too low to enable the particles to reach a second position near the other electrode corresponding to a white state.
    Type: Application
    Filed: February 6, 2003
    Publication date: July 28, 2005
    Inventors: Guo-Fu Zhou, Mark Johnson, Alexander Henzen, Willibrordus Dijkman
  • Publication number: 20050152020
    Abstract: An electrophoretic display device (1) comprising one pixel (10) with an electrophoretic medium (13), electrodes (6, 7), as well as drive means (4) by which the pixels can be brought into different optical states. Some time (thold) after the application of an addressing pulse (Paddress) for setting the brightness level (Rw, Rb) of a pixel (10), a restore pulse voltage (Prestore) is applied between the electrodes (6,6?,7) for restoring the brightness level of a pixel to the set level (Rw, Rb). The restore pulse may be a set of consecutive pulses to bring the drifted brightness level even more smoothly (i.e. less perceivably) back to the original brightness level.
    Type: Application
    Filed: February 12, 2003
    Publication date: July 14, 2005
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Mark Johnson, Guo-Fu Zhou, Alexander Henzen, Michael Pitt
  • Patent number: 6901044
    Abstract: An optical information medium (20) for erasable recording by means of a laser-light beam (10) is provided. A substrate (1) holds a stack (2) of layers with a phase-change recording layer (5) between a first dielectric layer (4) and a second dielectric layer (6). A light-absorptive layer (7) is present proximate the recording layer (5) and is made of a compound of the formula QRx, in which Q is the element Si, Ge, Ti, Zr, Hf, Nb or Ta, R is the element O or N, and 0<x?2.5, in order to achieve that 0.8<Ac/Aa<1.50, in which Ac and Aa are the respective quantities of laser-light absorbed in the recording layer (5) in the crystalline state and the amorphous state at a laser-light wavelength selected from a range of 350-450 nm. Thus high data rates and low data jitters are achieved at this short wavelength range by tuning x to an optimal value during manufacture of the optical information medium.
    Type: Grant
    Filed: December 4, 2001
    Date of Patent: May 31, 2005
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Johannes Cornelis Norbertus Rijpers, Guo-Fu Zhou
  • Patent number: 6861117
    Abstract: A description is given of multi-stack optical data storage medium (20) for rewritable recording by means of a focused laser-light beam (30), said medium (20) having a substrate (1) with deposited on a side thereof: a first recording slick (2) comprising a phase-change type recording layer (6)- at least one further recording stack (3) comprising a phase-change type recording layer (12),- a transparent spacer layer (9) adjacent each further recording stack (3). The further recording stack (3) is sufficiently transmissive to ensure proper sensitivity for reading and recording in the first recording stack (2). For this purpose, at least one heat sink layer (10) made of HfNx, and 1.1=×=1.6, is present in at least one of the recording stacks (3). The heat sink layer (10) further ensure proper cooling behavior of the recording layer (12) of the further recording stack (3) in order to obtain sufficient recording performance in the further recording stack (3).
    Type: Grant
    Filed: October 24, 2002
    Date of Patent: March 1, 2005
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Johannes Cornelis Norbertus Rijpers, Guo-Fu Zhou
  • Publication number: 20050003134
    Abstract: A description is given of multi-stack optical data storage medium (20) for rewritable recording by means of a focused laser-light beam (30), said medium (20) having a substrate (1) with deposited on a side thereof: a first recording stick (2) comprising n phase-change type recording layer (6) at least one further recording stack (3) comprising a phase-change type recording layer (12), n transparent spacer layer (9) adjacent each further recording stack (3). The further recording stack (3) is sufficiently transmissive to ensure proper sensitivity for reading and recording in the first recording stack (2). For this purpose, at least one heat sink layer (10) made of HfNx, and 1.1=x=1.6, is present in at least one of the recording stacks (3). The heat sink layer (11) further ensures proper cooling behavior of the recording layer (12) of the further recording stack (3) in order to obtain sufficient recording performance in the further recording stack (3).
    Type: Application
    Filed: October 24, 2002
    Publication date: January 6, 2005
    Inventors: Johannes Rijpers, Guo-Fu Zhou
  • Publication number: 20040157159
    Abstract: A description is given of a phase-change optical data storage medium (20 having a recording stack (2) with a recording layer (6) and a metal reflective layer (3) comprising at least one transparent layer (4, 8) of the material indium tin oxide (ITO). Use of an ITO layer (4, 8) in the recording stack (2) improves the cooling behavior of the recording layer (6) combined with good optical contrast. Thus, higher possible data rates are achieved.
    Type: Application
    Filed: November 26, 2003
    Publication date: August 12, 2004
    Inventors: Guo-Fu Zhou, Johannes Cornelis Norbertus Rijpers, Erwin Rinaldo Meinders, Hermanus Johannes Borg
  • Publication number: 20040146683
    Abstract: A description is given of multi-stack optical data storage medium (20) for rewritable recording by means of a focused laser-light beam (30), said medium (20) having a substrate (1) with deposited on a side thereof:—a first recording stack (2) comprising a phase-change type recording layer (6)—at least one further recording stack (3) comprising a phase-change type recording layer (12),—a transparent spacer layer (9) adjacent each further recording stack (3). The further recording stack (3) is sufficiently transmissive to ensure proper sensitivity for reading and recording in the first recording stack (2). For this purpose, at least one indium tin oxide layer (10) is present in at least one of the further recording stacks (3). The indium tin oxide layer (10) further cnsurcs proper cooling behavior of the recording layer (12) of the further recording stack (3) in order to obtain sufficient recording performance in the further recording stack (3).
    Type: Application
    Filed: November 26, 2003
    Publication date: July 29, 2004
    Inventors: Erwin Rinaldo Meinders, Hermanus Johannes Borg, Guo-Fu Zhou, Johannes Cornelis Norbertus Rijpers
  • Patent number: 6735165
    Abstract: A description is given of a disc-shaped rewritable optical information medium having an IPIM stack (2) comprising a phase-change recording layer (4) sandwiched between two dielectric layers (3,5), and a metal mirror layer (6). The thickness of the recording layer (4) increases gradually with increasing radius r. As a result, the complete erasure time CET of recorded marks decreases from the inner radius ri to the outer radius ro. Therefore, at a point closer to the outer radius marks can be recorded at a higher linear speed than at a point closer to the inner radius. This effect ensures that the recording medium can be used for recording at a constant angular velocity (CAV).
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: May 11, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Guo-Fu Zhou, Roel Van Woudenberg
  • Patent number: 6717895
    Abstract: The application relates to methods and devices for determining the optimal erase (17) and write powers for erasing and writing information on an optical record carrier (85). These optimal powers are determined from two powers, Pmin (15) and Pmax (16), found at specific points, (22) and (24), in a curve (10) where the normalized reflected power (12) is plotted versus the test power (11).
    Type: Grant
    Filed: February 13, 2003
    Date of Patent: April 6, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Guo-Fu Zhou, Roel Van Woudenberg, Johannes H. M. Spruit
  • Patent number: 6670013
    Abstract: An optical recording medium. The optical recording medium has a substrate and a stack of layers provided thereon. The stack of layers includes a phase change recording layer, having a melting point Tmp, sandwiched between a first and a second dielectric layer. The stack of layers further includes a crystallization-accelerating layer in contact with the recording layer, a reflective layer, and an optional cover layer. The crystallization-accelerating layer may of a binary metal alloy or a semiconductor and has a melting point Tmg at least 250° C. higher than the melting point Tmp of the recording layer and may have a crystal structure similar to the crystalline state of the recording layer.
    Type: Grant
    Filed: April 12, 2001
    Date of Patent: December 30, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Guo-Fu Zhou
  • Patent number: 6638594
    Abstract: A description is given of a rewritable optical information medium comprises a substrate (1), a first dielectric layer (2), a phase-change recording layer on the basis of AgaInbSbcTed or GeaInbSbcTed (3), a second dielectric layer (4), and a metal mirror layer (5), wherein 2<a<8 0<b<6 55<c<80 15<d<30; a+b+c+d=100, and wherein the layer thickness of said recording layer (3) ranges between 5 and 15 nm. Such a medium is suitable for use in high density and high data rate phase change optical recording systems and media such as DVD+RW, DVR-red and -blue.
    Type: Grant
    Filed: August 15, 2000
    Date of Patent: October 28, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Guo-Fu Zhou
  • Publication number: 20030156515
    Abstract: The application relates to methods and devices for determining the optimal erase (17) and write powers for erasing and writing information on an optical record carrier (85). These optimal powers are determined from two powers, Pmin (15) and Pmax (16), found at specific points, (22) and (24), in a curve (10) where the normalized reflected power (12) is plotted versus the test power (11).
    Type: Application
    Filed: February 13, 2003
    Publication date: August 21, 2003
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Guo-Fu Zhou, Roel Van Woudenberg, Johannes H.M. Spruit
  • Patent number: 6584051
    Abstract: The application relates to methods and devices for determining the optimal erase (17) and write powers for erasing and writing information on an optical record carrier (85). These optimal powers are determined from two powers, Pmin (15) and Pmax (16), found at specific points, (22) and (24), in a curve (10) where the normalized reflected power (12) is plotted versus the test power (11).
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: June 24, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Guo-Fu Zhou, Roel Van Woudenberg, Johannes H. M. Spruit
  • Publication number: 20020110081
    Abstract: An optical information medium (20) for erasable recording by means of a laser-light beam (10) is provided. A substrate (1) holds a stack (2) of layers with a phase-change recording layer (5) between a first dielectric layer (4) and a second dielectric layer (6). A light-absorptive layer (7) is present proximate the recording layer (5) and is made of a compound of the formula QRx, in which Q is the element Si, Ge, Ti, Zr, Hf, Nb or Ta, R is the element O or N, and 0<x≦2.5, in order to achieve that 0.8<Ac/Aa<1.50, in which Ac and Aa are the respective quantities of laser-light absorbed in the recording layer (5) in the crystalline state and the amorphous state at a laser-light wavelength selected from a range of 350-450 nm. Thus high data rates and low data jitters are achieved at this short wavelength range by tuning x to an optimal value during manufacture of the optical information medium.
    Type: Application
    Filed: December 4, 2001
    Publication date: August 15, 2002
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Johannes Cornelis Norbertus Rijpers, Guo- Fu Zhou
  • Publication number: 20020076646
    Abstract: An optical information medium (20) for high speed erasable recording by means of a laser-light beam (10) is provided. A substrate (1) has a stack (2) of layers with a first dielectric layer (5) and a second dielectric layer (7), a phase-change recording layer (6) between the first dielectric layer (5) and the second dielectric layer (7), and a reflective layer (3). The recording layer (6) has a compound of Ge and Te, and at least the first dielectric layer (5) consists of oxides of Ta and Si, nitrides of Si and Al, or carbides of Si, and is in contact with the recording layer (6). The recording layer (6) additionally may contain O or N in an amount up to 5 at. %. A broad usable composition range for low CET values is obtained. Thus high data rates are achieved.
    Type: Application
    Filed: December 4, 2001
    Publication date: June 20, 2002
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Guo-fu Zhou, Johannes Cornelis Norbertus Rijpers