Patents by Inventor Hsin-Cheng Liu

Hsin-Cheng Liu 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: 11196440
    Abstract: A digital to analog converter for fiber optic gyroscope is disclosed. The digital to analog converter for fiber optic gyroscope includes a random unit generating a random number signal, a plurality of encoding units coupled with the random unit, a plurality of control units respectively one to one coupled with the plurality of encoding units, a current source array coupled with the plurality of control units, and an output load electrically connected to the current source array. Each of the plurality of encoding units converts a plurality of digital signals to a plurality of spin signals according to the random number signal. Each of the plurality of control units converts the plurality of spin signals to a plurality of logic signals. The current source array generates a total current according to the plurality of logic signals. The total current passes through the output load and forms an analog signal.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: December 7, 2021
    Assignee: NATIONAL SUN YAT-SEN UNIVERSITY
    Inventors: Chua-Chin Wang, Hsin-Cheng Liu, Yi-Jen Chiu
  • Patent number: 10113116
    Abstract: A liquid crystal compound and a composition employing the same are provided. The liquid crystal compound has a structure represented by Formula (I) wherein R1, A1, A2, A3, A4, Z1, Z2, Z3, Z4, X, m, n, o, and p are defined as in the description.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: October 30, 2018
    Assignee: DAXIN MATERIALS CORPORATION
    Inventors: Chih-Yuan Lo, Hsin-Cheng Liu, Guo-Yu Lan, Chun-Chih Wang
  • Patent number: 9598639
    Abstract: Liquid-crystal compounds, liquid-crystal compositions, and liquid-crystal devices employing the same are provided. The liquid-crystal compound has a structure of Formula (I): wherein R1 is hydrogen, C1-10 alkyl, or C2-10 alkenyl; R2 is, C2-10 alkenyl, or C2-10 fluoroalkenyl, in which one or two nonadjacent —CH2— is replaced by —O—, or C2-10 ether; A1, A2, A3, and A4 are independently R3 is independently hydrogen, or halogen; Z1, Z2, and Z3 are independently single bond, —CH2—, —(CH2)2—, —(CH2)4—, —CH2O—, —OCH2—, —CF?CF—, —(CH2)2CF2O—, —(CH2)2OCF2—, —OCF2(CH2)2—, —CF2O(CH2)2—, —COO—, —OCO—, —CF2O—, —OCF2—, —C?C—, —CH?CH—, —CH?CH—(CH2)2—, or —(CH2)2—CH?CH—; and n and m are independently 1 or 0.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: March 21, 2017
    Assignee: DAXIN MATERIALS CORPORATION
    Inventors: Ching-Tien Lee, Hsin-Cheng Liu, Chun-Chih Wang, Wan-Yu Huang, Tian-Meng Jiang, Hui-Qiang Tian, Li-Long Gao
  • Publication number: 20160222295
    Abstract: A liquid crystal compound and a composition employing the same are provided. The liquid crystal compound has a structure represented by Formula (I) wherein R1, A1, A2, A3, A4, Z1, Z2, Z3, Z4, X, m, n, o, and p are defined as in the description.
    Type: Application
    Filed: January 27, 2016
    Publication date: August 4, 2016
    Inventors: CHIH-YUAN LO, HSIN-CHENG LIU, GUO-YU LAN, CHUN-CHIH WANG
  • Publication number: 20160024384
    Abstract: Liquid-crystal compounds, liquid-crystal compositions, and liquid-crystal devices employing the same are provided. The liquid-crystal compound has a structure of Formula (I): wherein R1 is hydrogen, C1-10 alkyl, or C2-10 alkenyl; R2 is, C2-10 alkenyl, or C2-10 fluoroalkenyl, in which one or two nonadjacent —CH2— is replaced by —O—, or C2-10 ether; A1, A2, A3, and A4 are independently R3 is independently hydrogen, or halogen; Z1, Z2, and Z3 are independently single bond, —CH2—, —(CH2)2—, —(CH2)4—, —CH2O—, —OCH2—, —CF?CF—, —(CH2)2CF2O—, —(CH2)2OCF2—, —OCF2(CH2)2—, —CF2O(CH2)2—, —COO—, —OCO—, —CF2O—, —OCF2—, —C?C—, —CH?CH—, —CH?CH—(CH2)2—, or —(CH2)2—CH?CH—; and n and m are independently 1 or 0.
    Type: Application
    Filed: July 22, 2015
    Publication date: January 28, 2016
    Inventors: Ching-Tien LEE, Hsin-Cheng LIU, Chun-Chih WANG, Wan-Yu HUANG, Tian-Meng JIANG, Hui-Qiang TIAN, Li-Long GAO
  • Patent number: 6997217
    Abstract: A gas conduit for a load lock chamber. The gas conduit connects to a gas source to introduce gas from the gas source into the load lock chamber of semiconductor equipment. The structure includes a filter mounted on the top surface of the load lock chamber, a pressure limitative device to maintain a preset pressure of gas source, and a gas inlet device including an inlet end connected to the pressure limitative device and an outlet end connected to the filter, wherein the gas inlet device introduces gas from the gas source into the load lock chamber with its maximum flow rate when breaching the vacuum therein.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: February 14, 2006
    Assignee: Macronix International Co., Ltd.
    Inventors: Shih-Hao Shih, Wei-Chen Chen, Chi-Chen Luo, Hsin-Cheng Liu, Andy Lin
  • Patent number: 6897121
    Abstract: A method of removing HDP oxide deposition comprises the steps of: (1) etching the HDP oxide deposition by in-side-out model, wherein the etching rate in the center of the substrate is faster than the edges of the substrate; (2) etching the HDP oxide deposition by out-side-in model, wherein the etching rate in the edges of the substrate is faster than the center of the substrate; and (3) removing the remaining silicon oxide layer using chemical-mechanical polishing (CMP). According to the method of the invention, the HDP oxide deposition can be planarized more uniform.
    Type: Grant
    Filed: May 21, 2003
    Date of Patent: May 24, 2005
    Assignee: Macronix International Co., Ltd.
    Inventors: H. Wally Lee, Ching-Ping Wu, Han-Maou Chang, Ma Chia-Chih, Nan-Tzu Lian, Hsin-Cheng Liu
  • Patent number: 6799152
    Abstract: The current invention provides a method for analyzing process variations that occur during integrated circuit fabrication. Critical dimension data is collected for each layer of the integrated circuit fabrication process for a period of time and a shift indicator that indicates variation in the critical dimension data for each layer of the integrated circuit fabrication process is calculated. A machine drift significance indicator is also calculated for each machine used in each layer of the integrated circuit fabrication process, and a maximum shift of mean value for each layer of the integrated circuit fabrication process is defined. The shift indicator, the maximum shift of mean value and the machine drift significance indicator are used to determine at least one likely cause of variation in critical dimension for each layer of the integrated circuit fabrication process.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: September 28, 2004
    Assignee: Macronix International Co., Ltd.
    Inventors: Chih-Ping Chen, Shao-Chung Hsu, De-Chuan Liu, Jung-Kuei Lu, Cheng-Yi Lin, Ta-Hung Yang, Hsin-Cheng Liu, Mao-I Ting, Yih-Cheng Shih
  • Publication number: 20040023501
    Abstract: A method of removing HDP oxide deposition comprises the steps of: (1) etching the HDP oxide deposition by in-side-out model, wherein the etching rate in the center of the substrate is faster than the edges of the substrate; (2) etching the HDP oxide deposition by out-side-in model, wherein the etching rate in the edges of the substrate is faster than the center of the substrate; and (3) removing the remaining silicon oxide layer using chemical-mechanical polishing (CMP). According to the method of the invention, the HDP oxide deposition can be planarized more uniform.
    Type: Application
    Filed: May 21, 2003
    Publication date: February 5, 2004
    Inventors: H. W. Lee, Ching-Ping Wu, Han-Maou Chang, Chia-Chih Ma, Nan-Tzu Lian, Hsin-Cheng Liu
  • Publication number: 20040023505
    Abstract: A method of removing ALF defects on a device after pad etching process, comprising the steps of: (a) applying EKC solution substantially comprising hydroxylamine (HDA) to the device for about 30 min; (b) applying an intermediate rinse chemical, such as Isopropyl alcohol (IPA) or N-methyl pyrrolidone (NMP), to the device for about 0.5 min to 3 min; and (c) applying water to the device. The ALF defects are effectively removed in the method of the invention, and the bad wafers can be turned to the good ones. Consequently, the primary cost during the manufacture is greatly decreased.
    Type: Application
    Filed: May 21, 2003
    Publication date: February 5, 2004
    Inventors: Yen-Huei Su, Ching-Ping Wu, H.W. Lee, Nan-Tzu Lian, Hsin-Cheng Liu
  • Publication number: 20040014628
    Abstract: A composition suitable for removing a polymer residue on a substrate in post metal solvent strip process substantially comprises water, alkanolamine and a sugar alcohol, and the amount of water is improved to about 20%. To remove the polymer residue, the composition of the invention is applied on a substrate for about 5 min to 15 min at a temperature ranged from about 60° C. to 70° C. The lifetime of the composition is greatly extended from 12 hours to 48 hours by increasing the amount of water from 15% to 20%.
    Type: Application
    Filed: July 22, 2002
    Publication date: January 22, 2004
    Inventors: Ching-Ping Wu, H. W. Lee, Tsung-Yu Hung, Nan-Tzu Lian, Hsin-Cheng Liu
  • Publication number: 20030213143
    Abstract: A gas conduit for a load lock chamber. The gas conduit connects to a gas source to introduce gas from the gas source into the load lock chamber of semiconductor equipment. The structure includes a filter mounted on the top surface of the load lock chamber, a pressure limitative device to maintain a preset pressure of gas source, and a gas inlet device including an inlet end connected to the pressure limitative device and an outlet end connected to the filter, wherein the gas inlet device introduces gas from the gas source into the load lock chamber with its maximum flow rate when breaching the vacuum therein.
    Type: Application
    Filed: November 7, 2002
    Publication date: November 20, 2003
    Inventors: Shih-Hao Shih, Wei-Chen Chen, C.C. Luo, Hsin-Cheng Liu, Andy Lin
  • Publication number: 20030196681
    Abstract: A method for eliminating residual polymers for cleaning etched windows of bonding pads. The invention provides a wafer with etched bonding pad windows that is free of residual polymer. Residual polymers induce an increase in the defect rate of cleaning process and bonding process. The wet stripping process peels Polyimide pieces from the surface of the passivation layer to form residual polymers on the wafer. The present invention utilizes the O2-ashing process to eliminate the residual polymers on the wafer. The present invention not only prevents Al—F formation on the bonding pads but also eliminates the residual polymers on the wafer. Therefore, the present invention may enhance the yield rate of semiconductor manufacturing by reducing the defect rates. The present invention does not increase the cost of the cleaning process but does increase the quality of the semiconductor.
    Type: Application
    Filed: April 23, 2002
    Publication date: October 23, 2003
    Inventors: Ching-Ping Wu, H. W. Lee, Szu-Cheng Huang, Nan-Tzu Lian, Hsin-Cheng Liu
  • Publication number: 20030181055
    Abstract: A method of removing sidewall polymer fence of the dielectric layer, which is a wet strip process using acidic SC1 and CR solutions, and SC1 solution is applied before CR solution. SC1 solution substantially comprises ammonium hydroxide, sulfuric acid and water for removing sidewall polymer fence, and CR solution substantially comprises sulfuric acid and hydrogen peroxide for removing photo-resist. The key of the wet strip process of the invention is that SC1 solution is applied at a low temperature for reducing the oxide loss. The wet strip process of the invention can completely remove the sidewall polymer fence and reduce the oxide loss of the dielectric layer.
    Type: Application
    Filed: February 6, 2003
    Publication date: September 25, 2003
    Inventors: Ching-Ping Wu, H. W. Lee, Tung-Yuan Hou, Yen-Huei Su, Nan-Tzu Lian, Hsin-Cheng Liu
  • Patent number: 5689844
    Abstract: This invention relates to an improved pillow having a multiple layer configuration. The pillow comprises an inner core, an intermediate layer and a surface layer. The inner core is integrally formed by three different materials each of which them has different elastic capability. The inner core has a corrugated outer surface. The inner core is further enclosed by an intermediate layer and is integrally formed by three different materials each of which them has different elastic capability. The intermediate layer has a smooth inner surface and a corrugated outer surface. The surface layer is made from son foam and has a smooth inner surface and a corrugated outer surface. By this arrangement, a supporting gradient is established in the resulting pillow. The pillow can be readily oriented to obtain suitable support for the head an neck portions to meet different requirements from the user.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: November 25, 1997
    Inventor: Hsin-Cheng Liu
  • Patent number: D393564
    Type: Grant
    Filed: April 18, 1997
    Date of Patent: April 21, 1998
    Inventor: Hsin-Cheng Liu