Patents by Inventor Wu Liao
Wu Liao 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).
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Publication number: 20080053290Abstract: A clipping device for a drum counterhoop is disclosed. The clipping device is substantially a C-shaped body with an inner edge bottom pivotally mounted to an actuating board frame, the middle section of the board frame is a screw rod protruded out to the C-shaped body to control simultaneously an actuating at the external end of the actuating board frame such that the actuating plate is conveniently pivotally mounted to the counterhoop of the drum, the external edge of the C-shaped body is disposed with a securing seat and the upper section of the seat body is pivotally locked with a fastening cap, in combination with the urging of the locking rod of a locking device, a frame insertion module for mounting musical components is inserted into the securing seat and is locked.Type: ApplicationFiled: August 31, 2006Publication date: March 6, 2008Inventors: Chang-Hui Chen, Tsun-Wu Liao
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Publication number: 20070293155Abstract: The invention presents a chipset for a mobile wallet system in a communication terminal having a SIM socket and a RFID antenna. The chipset includes a wallet module and a controller module. The wallet module has a contactless interface port coupled to the RFID antenna and a wallet memory for storing wallet applications. The controller module, connected to the SIM socket of the communication terminal, has a controller memory stored with SIM function software, mobile wallet application software and software to control the wallet module. The controller module is powered through the SIM socket, and the wallet module is powered through the SIM socket and the RFID antenna.Type: ApplicationFiled: June 7, 2007Publication date: December 20, 2007Applicant: Jton Systems Inc.Inventors: Dave Ta-Wu Liao, Steven Donald Edelson
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Patent number: 6972606Abstract: A delay circuit and related apparatus for providing a longer delay time, such that when a level of an input signal changes, a level of an output signal changes accordingly after the predetermined delay time. The delay circuit has a storage unit, a current generator, a voltage generator for providing a reference voltage, a differential amplifier, and a feedback control module. The current generator starts to provide a charging current to the storage unit when the input signal changes level, such that an output charging voltage of the storages unit is gradually charged to reach the reference voltage. The feedback control module is capable of dynamically decreasing the charging current provided to the storage unit as the charging voltage is approaching the reference voltage, and the amplifier will change the level of the output voltage when the charging voltage reaches the reference voltage.Type: GrantFiled: February 10, 2004Date of Patent: December 6, 2005Assignee: eMemory Technology Inc.Inventors: Wei-Ming Ku, Yu-Ming Hsu, Wei-Wu Liao
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Publication number: 20050030079Abstract: A delay circuit and related apparatus for providing a longer delay time, such that when a level of an input signal changes, a level of an output signal changes accordingly after the predetermined delay time. The delay circuit has a storage unit, a current generator, a voltage generator for providing a reference voltage, a differential amplifier, and a feedback control module. The current generator starts to provide a charging current to the storage unit when the input signal changes level, such that an output charging voltage of the storages unit is gradually charged to reach the reference voltage. The feedback control module is capable of dynamically decreasing the charging current provided to the storage unit as the charging voltage is approaching the reference voltage, and the amplifier will change the level of the output voltage when the charging voltage reaches the reference voltage.Type: ApplicationFiled: February 10, 2004Publication date: February 10, 2005Inventors: Wei-Ming Ku, Yu-Ming Hsu, Wei-Wu Liao
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Patent number: 6727180Abstract: A method for forming contact window is disclosed. Essential concept of the invention comprises over coating layer formed over surface before forming contact window is formed and the etching rate of over coating layer is higher than etching rate of underlying layer. The method comprises following steps: First, forming semiconductor structures on surface of wafer. Second, forming a coating layer over the surface and covering these semiconductor structures. Third, forming an over coating layer on the coating layer, where etching rate of over coating layer is higher than etching rate of coating layer. Finally, form contact window with outwardly winded shape. Thus, contact window formed by the invention is more convenient for filling material than contact window formed by conventional method. In addition, because width of contact window is not obviously increased, this invention is more beneficial for deep-submicron fabrication.Type: GrantFiled: April 23, 2001Date of Patent: April 27, 2004Assignee: United Microelectronics Corp.Inventors: Chien-Li Kuo, Wei-Wu Liao
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Publication number: 20040056248Abstract: A test key includes a substrate, a deep trench capacitor formed in the substrate, and at least one active region defined on the substrate. The active region comprises a first region, a second region and an ion well. A thermal oxide layer is formed in the first region. A top-thin oxide layer is formed in the second region. The second region overlaps with the deep trench capacitor. At least one word line partially overlapping with the top-thin oxide layer. The ion well is electrically connected with a polysilicon electrode of the deep trench capacitor. The thermal oxide layer within the first region does not overlap with any word line.Type: ApplicationFiled: September 25, 2002Publication date: March 25, 2004Inventors: Chih-Cheng Liu, Wei-Wu Liao, Chuan Fu Wang
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Publication number: 20030184360Abstract: A charge pump for a flash memory. The charge pump includes: a current-guiding circuit having a first, a second, and a third output; and a first, a second, and a third charge unit. The current-guiding circuit has two diode-connected transistors respectively connected between the first and the second outputs, and the second and the third outputs. Each of the charge units, for storing charge, has two ends. The first, the second, and the third charge units respectively have one end connected to the first, the second, and the third outputs, and the other end of the third charge unit is connected to the first output.Type: ApplicationFiled: December 12, 2002Publication date: October 2, 2003Inventors: Yi-Ti Wang, Wei-Wu Liao, Wen-Shih Shu
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Patent number: 6627551Abstract: This invention discloses a method for avoiding microscratch in interlevel dielectric layer chemical mechanical polishing process. There is step height difference on surface of the interlevel dielectric layer between the memory array and the logic device, so, the interlevel dielectric layer over the memory array is etched to form a sidewall and a corner. As a key step of this invention, a dielectric layer is capped over the interlevel dielectric layer to smooth the corner and avoid microscratch thereon when performing chemical mechanical polishing process.Type: GrantFiled: June 6, 2001Date of Patent: September 30, 2003Assignee: United Microelectronics Corp.Inventor: Wei-Wu Liao
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Publication number: 20020187641Abstract: This invention discloses a method for avoiding microscratch in interlevel dielectric layer chemical mechanical polishing process. There is step height difference on surface of the interlevel dielectric layer between the memory array and the logic device, so, the interlevel dielectric layer over the memory array is etched to form a sidewall and a corner. As a key step of this invention, a dielectric layer is capped over the interlevel dielectric layer to smooth the corner and avoid microscratch thereon when performing chemical mechanical polishing process.Type: ApplicationFiled: June 6, 2001Publication date: December 12, 2002Inventor: Wei-Wu Liao
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Publication number: 20020186998Abstract: A clamping device, for elbow connection having adjustable angle comprising a main body tube seat which can be locked onto a tube and a rotating toothed locking device of an elbow connector, characterizing that a lateral side of the tube seat is connected with a protruded L-shaped board seat, having a through hole at the center thereof. The internal side of the through hole of the protruded L-shaped board seat is provided with a toothed surface arranged in the circular manner and the external side of the clamping element of the locking device is provided with a matching toothed surface for engagement with that of the board seat to position. When the locking nut is released, the locking device can be changed so as to rotate the elbow connector to a desired angle.Type: ApplicationFiled: June 8, 2001Publication date: December 12, 2002Inventors: Chang Hui Chen, Tsun Wu Liao
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Publication number: 20020072231Abstract: A method of forming self-aligned suicide. An inter-poly dielectric layer is formed on a metal-oxide semiconductor to cover a source/drain region of the metal-oxide semiconductor, while a gate thereof is exposed. A metal layer is formed to cover the exposed gate and the inter-poly dielectric layer. Performing a rapid thermal process, the metal layer is reacted with the gate to form a silicide layer. The remaining metal layer which is not reacted with the gate and the inter-poly dielectric layer are then removed to expose the source/drain region. Another metal layer is formed to cover the source/drain region. Performing a rapid thermal process, the metal layer is reacted with the source/drain region to form another silicide layer.Type: ApplicationFiled: December 8, 2000Publication date: June 13, 2002Applicant: United Microelectronics Corp.Inventors: Wei-Wu Liao, Jason J.S. Jenq, Ching-Hsu Chan
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Patent number: 6368971Abstract: A method of manufacturing a bottom electrode of a capacitor. A substrate has a contact pad formed thereon, a first dielectric layer is formed on the contact pad, and a node contact penetrates through the first dielectric layer and electrically couples to the contact pad. A second dielectric layer is formed on the first dielectric layer and the node contact. A third dielectric layer is formed on the second dielectric layer. A fourth dielectric layer is formed on the third dielectric layer. A trench is formed to penetrate through the fourth, the third and the second dielectric layer and to expose a surface of the node contact. A conductive layer is formed on the fourth dielectric layer and a sidewall and a bottom of the trench. A fifth dielectric layer is formed on the conductive layer, wherein the fifth dielectric layer fills the trench. A portion of the fifth dielectric layer and a portion of the conductive layer are removed until a surface of the fourth dielectric layer is exposed.Type: GrantFiled: July 7, 1999Date of Patent: April 9, 2002Assignee: United Microelectronics Corp.Inventors: Sun-Chieh Chien, Chien-Li Kuo, Wei-Wu Liao
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Publication number: 20010046782Abstract: A method for forming contact window is disclosed. Essential concept of the invention comprises over coating layer formed over surface before forming contact window is formed and the etching rate of over coating layer is higher than etching rate of underlying layer. The method comprises following steps: First, forming semiconductor structures on surface of wafer. Second, forming a coating layer over the surface and covering these semiconductor structures. Third, forming an over coating layer on the coating layer, where etching rate of over coating layer is higher than etching rate of coating layer. Finally, form contact window with outwardly winded shape. Thus, contact window formed by the invention is more convenient for filling material than contact window formed by conventional method. In addition, because width of contact window is not obviously increased, this invention is more beneficial for deep-submicron fabrication.Type: ApplicationFiled: April 23, 2001Publication date: November 29, 2001Inventors: Chien-Li Kuo, Wei-Wu Liao
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Patent number: 6303465Abstract: A method for fabricating a borderless contact is disclosed. The method includes providing a substrate with an active region and a trench formed therein. Then, the trench is etched to stop at a depth. A conformal stop layer is deposited on the substrate. As a key step, the stop layer is etched to form spacer against top corner of the trench. A dielectric layer is formed on the substrate. Then, an opening is etched in the dielectric layer to form a borderless contact, wherein the opening overlies both a portion of the trench and a portion of the active region.Type: GrantFiled: June 25, 1999Date of Patent: October 16, 2001Assignee: United Microelectronics Corp.Inventor: Wei-Wu Liao
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Patent number: 6284647Abstract: A method of enhancing chemical mechanical polishing uniformity is provided. In the fabrication of a shallow trench isolation structure, there are active area regions with different integration formed in a chip. The integration of the active area regions in the chip is computed according circuit designs by a program analysis. One of the active area regions with the highest integration is used as a basis, dummy mesas are formed in the other active area regions to adjust the integration of the chip.Type: GrantFiled: December 16, 1998Date of Patent: September 4, 2001Assignee: United Microelectronics Corp.Inventors: Sun-Chieh Chien, Chien-Li Kuo, Tzung-Han Lee, Wei-Wu Liao
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Patent number: 6281067Abstract: A self-aligned process for forming a silicide layer over word lines in DRAM and a silicide layer over transistors in a logic device region. A substrate that includes a memory cell region and a logic circuit region is provided. A first transistor and a second transistor are formed over the substrate. The first transistor is formed in the logic circuit region and includes a first gate conductive layer and a first source/drain region. The second transistor is formed in the memory cell region and includes a second gate conductive layer and a second source/drain region. A blocking layer is formed over both the first transistor and the second transistor. A portion of the blocking layer is removed to expose the first gate conductive layer, the first source/drain region and the second gate conductive layer. The remaining blocking layer still covers the second source/drain region. A metal silicide layer is formed over the first gate conductive layer, the first source/drain region and the second gate conductive layer.Type: GrantFiled: November 12, 1999Date of Patent: August 28, 2001Assignee: United Microelectronics Corp.Inventors: Sun-Chieh Chien, Hal Lee, Jhy-Jeng Liu, Wei-Wu Liao
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Patent number: 6281081Abstract: An ion implantation method useful for fabricating shallow trench isolation structureimplants phosphorus ions instead of arsenic ions into a substrate when the source/drain regions of an NMOS device are doped. Alternatively, low energy ions are used in the ion implantation for forming the source/drain regions of an NMOS device. Consequently lattice dislocations of the crystal structure within a substrate is reduced and unwanted device leakage current is eliminated.Type: GrantFiled: November 13, 1998Date of Patent: August 28, 2001Assignee: United Microelectronics Corp.Inventors: Sun-Chieh Chien, Chien-Li Kuo, Tzung-Han Lee, Wei-Wu Liao
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Publication number: 20010008785Abstract: A method of forming a bottom electrode of a capacitor in a dynamic random access memory cell. The bottom electrode of the capacitor is formed on a semiconductor wafer, the semiconductor wafer includes a silicon substrate, and a first dielectric layer positioned on the silicon substrate having a contact hole extending down to the silicon substrate. The method includes the following steps: a first polysilicon layer is formed in the contact hole as a conductive plug. A second dielectric layer is then formed on the first dielectric layer. A vertical opening is formed in the second dielectric layer that extends down to the contact hole, and a pillar-shaped second polysilicon layer is formed in the opening, that the bottom end of the second polysilicon layer is electrically connected to the first polysilicon layer in the contact hole.Type: ApplicationFiled: January 19, 2001Publication date: July 19, 2001Inventors: Wei-Wu Liao, Chien-Li Kuo
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Publication number: 20010003674Abstract: A method of manufacturing a bottom electrode of a capacitor. A substrate has a contact pad formed thereon, a first dielectric layer is formed on the contact pad, and a node contact penetrates through the first dielectric layer and electrically couples to the contact pad. A second dielectric layer is formed on the first dielectric layer and the node contact. A third dielectric layer is formed on the second dielectric layer. A fourth dielectric layer is formed on the third dielectric layer. A trench is formed to penetrate through the fourth, the third and the second dielectric layer and to expose a surface of the node contact. A conductive layer is formed on the fourth dielectric layer and a sidewall and a bottom of the trench. A fifth dielectric layer is formed on the conductive layer, wherein the fifth dielectric layer fills the trench. A portion of the fifth dielectric layer and a portion of the conductive layer are removed until a surface of the fourth dielectric layer is exposed.Type: ApplicationFiled: July 7, 1999Publication date: June 14, 2001Inventors: SUN-CHIEH CHIEN, CHIEN-LI KUO, WEI-WU LIAO
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Patent number: 6200880Abstract: A method for forming a shallow trench isolation used to isolate a device is provided. A pad oxide and a mask layer are formed on a substrate and patterned. A trench is formed within the substrate under the patterned region and the trench is filled with insulator to form an insulation plug, which is a shallow trench isolation. A dielectric layer is formed on the whole substrate surface to cover the device region and the insulation plug.Type: GrantFiled: November 16, 1998Date of Patent: March 13, 2001Assignee: United Microelectronics Corp.Inventors: Sun-Chieh Chien, Chien-Li Kuo, Tzung-Han Lee, Wei-Wu Liao