Patents by Inventor Hwa Cheng

Hwa Cheng 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: 20240136316
    Abstract: A semiconductor package includes a conductive pillar and a solder. The conductive pillar has a first sidewall and a second sidewall opposite to the first sidewall, wherein a height of the first sidewall is greater than a height of the second sidewall. The solder is disposed on and in direct contact with the conductive pillar, wherein the solder is hanging over the first sidewall and the second sidewall of conductive pillar.
    Type: Application
    Filed: January 2, 2024
    Publication date: April 25, 2024
    Applicant: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Chiang-Jui Chu, Ching-Wen Hsiao, Hao-Chun Liu, Ming-Da Cheng, Young-Hwa Wu, Tao-Sheng Chang
  • Patent number: 11955960
    Abstract: The invention uses the control circuit formed on the silicon wafer to detect the leakage current of transistor formed on the depletion mode GaN wafer and then adjust the gate voltage of the depletion mode GaN transistor according to the detected leakage current. Essentially, the gate voltage is reduced or viewed as made more negative when the detected leakage current is larger a specific value. Thus, the gate voltage can be gradually adjusted to approach a specific threshold voltage that right block the leakage current. In other words, by making the gate voltage more negative when non-zero leakage current is detected and even by making the gate voltage more positive when zero leakage current is detected, the depletion mode GaN transistor can be adjusted to have an acceptable or even zero leakage current, a high reaction rate and an optimized efficiency.
    Type: Grant
    Filed: August 23, 2022
    Date of Patent: April 9, 2024
    Assignee: CHIP-GAN POWER SEMICONDUCTOR CORPORATION
    Inventors: Ke-Horng Chen, Tzu-Hsien Yang, Yong-Hwa Wen, Kuo-Lin Cheng
  • Publication number: 20240072790
    Abstract: The invention uses the control circuit formed on the silicon wafer to detect the leakage current of transistor formed on the depletion mode GaN wafer and then adjust the gate voltage of the depletion mode GaN transistor according to the detected leakage current. Essentially, the gate voltage is reduced or viewed as made more negative when the detected leakage current is larger a specific value. Thus, the gate voltage can be gradually adjusted to approach a specific threshold voltage that right block the leakage current. In other words, by making the gate voltage more negative when non-zero leakage current is detected and even by making the gate voltage more positive when zero leakage current is detected, the depletion mode GaN transistor can be adjusted to have an acceptable or even zero leakage current, a high reaction rate and an optimized efficiency.
    Type: Application
    Filed: August 23, 2022
    Publication date: February 29, 2024
    Inventors: KE-HORNG CHEN, TZU-HSIEN YANG, YONG-HWA WEN, KUO-LIN CHENG
  • Publication number: 20160347265
    Abstract: An interchangeable cover for at least a portion of a vehicle interior lining component comprising a molded base having an interior contour corresponding to an exterior shape of the component to be covered, a plurality of fixing means for mounting the cover over the component, and a facing sheet attached to an exterior surface of the base.
    Type: Application
    Filed: August 12, 2016
    Publication date: December 1, 2016
    Inventors: HWA CHENG TEOH, CHEE KENG SAM, CHEN XIANG WONG
  • Publication number: 20160317755
    Abstract: A safety syringe includes a barrel including a hollow cylindrical tip; a needle assembly including a hollow needle hub on the tip; a hinge including a bifurcated base and a moveable bifurcation on the needle hub, the movable bifurcation having two relaxation length of hinge ends pivotably secured to the base, a wall member formed with the bifurcation, and a V-shaped resilient member having two ends hingedly secured to the bifurcation and the base respectively; and a needle protection housing including a grooved body and a latch releasably secured to the wall member. When the needle protection housing is pivoted about both the resilient member and the hinge ends, resilient energy is stored in the resilient member. When the resilient energy reaches a set value, the resilient member releases the resilient energy to pivot the needle protection housing toward a hypodermic needle until the hypodermic needle is lockingly concealed in the grooved body.
    Type: Application
    Filed: July 31, 2015
    Publication date: November 3, 2016
    Inventors: Hsien-Tsung WANG, Wan-Hwa CHENG
  • Publication number: 20160207432
    Abstract: A vehicle seat cover arrangement comprising a vehicle seat having an outer surface, an interchangeable vehicle seat cover having an inner surface integrally made from a plush-like material with a loops-like structure, and a sheet-like attachment means having a hooks-like surface and attached on to the outer surface of the vehicle seat, wherein the seat cover is closely fitted on to the vehicle seat by engagement between the loops-like structure and the hooks-like surface.
    Type: Application
    Filed: March 31, 2016
    Publication date: July 21, 2016
    Inventors: Hwa Cheng Teoh, Chee Keng Sam, Chen Xiang Wong
  • Patent number: 9322593
    Abstract: An umbrella draining assembly mainly includes a cylindrical containing cistern body, a flinging device disposed in an inner section of the containing cistern body, and a bearing plate disposed at a bottom edge of the containing cistern body. A positioning component is disposed in the containing cistern body. The flinging device includes an embedding section, at an inner edge thereof is disposed a plurality of tapering serrated segments. A transmission component is disposed at a bottom edge of the embedding section. When the umbrella draining assembly is in use, a top shaft of an umbrella is inserted into the embedding section, with the positioning component fixing the position of the umbrella. The transmission component drives the embedding section to rotate quickly, causing rainwater on the umbrella to be flung outward due to centrifugal force and to fall on the bearing plate at a bottom edge of the containing cistern body.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: April 26, 2016
    Inventor: Li-Hwa Cheng
  • Publication number: 20150362252
    Abstract: An umbrella draining assembly mainly includes a cylindrical containing cistern body, a flinging device disposed in an inner section of the containing cistern body, and a bearing plate disposed at a bottom edge of the containing cistern body. A positioning component is disposed in the containing cistern body. The flinging device includes an embedding section, at an inner edge thereof is disposed a plurality of tapering serrated segments. A transmission component is disposed at a bottom edge of the embedding section. When the umbrella draining assembly is in use, a top shaft of an umbrella is inserted into the embedding section, with the positioning component fixing the position of the umbrella. The transmission component drives the embedding section to rotate quickly, causing rainwater on the umbrella to be flung outward due to centrifugal force and to fall on the bearing plate at a bottom edge of the containing cistern body.
    Type: Application
    Filed: June 16, 2014
    Publication date: December 17, 2015
    Inventor: LI-HWA CHENG
  • Patent number: 9184520
    Abstract: An electrical connector includes a base and an elastic terminal. The base has a recess. The elastic terminal is connected to the base and extends to the recess. The elastic terminal has a fixed end and a free end, the fixed end is connected to the base, and the free end is located at the recess and is curved. When the contact moves towards the recess, the contact is capable of pushing the contact protrusion to bend towards the bottom of the recess so that the free end leans against the bottom of the recess. The electrical connector may further include a contact protrusion connected to the elastic terminal. When the contact moves towards the recess, the contact is capable of pushing the contact protrusion to make the elastic terminal bend towards the bottom portion of the recess so that the free end leans against the bottom of the recess.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: November 10, 2015
    Assignee: Unimicron Technology Corp.
    Inventors: Chih-Peng Fan, Yin-Hwa Cheng, Ching-Ho Hsieh, Ling-Kai Su, Yung-Hao Hsueh
  • Publication number: 20140335705
    Abstract: An electrical connector includes a base an elastic terminal and an elastic terminal. The base has a recess. The elastic terminal is connected to the base and extends to the recess. When the contact moves towards the recess, the contact is capable of pushing the contact protrusion to bend towards the bottom of the recess. In addition, the electrical connector may further include a contact protrusion connected to the elastic terminal. When the contact moves towards the recess, the contact is capable of pushing the contact protrusion to make the elastic terminal bend towards the bottom portion of the recess.
    Type: Application
    Filed: July 3, 2013
    Publication date: November 13, 2014
    Inventors: Chih-Peng Fan, Yin-Hwa Cheng, Ching-Ho Hsieh, Ling-Kai Su, Yung-Hao Hsueh
  • Publication number: 20140335706
    Abstract: An electrical connector includes a base and an elastic terminal. The base has a recess. The elastic terminal is connected to the base and extends to the recess. The elastic terminal has a fixed end and a free end, the fixed end is connected to the base, and the free end is located at the recess and is curved. When the contact moves towards the recess, the contact is capable of pushing the contact protrusion to bend towards the bottom of the recess so that the free end leans against the bottom of the recess. The electrical connector may further include a contact protrusion connected to the elastic terminal. When the contact moves towards the recess, the contact is capable of pushing the contact protrusion to make the elastic terminal bend towards the bottom portion of the recess so that the free end leans against the bottom of the recess.
    Type: Application
    Filed: April 16, 2014
    Publication date: November 13, 2014
    Applicant: Unimicron Technology Corp.
    Inventors: Chih-Peng Fan, Yin-Hwa Cheng, Ching-Ho Hsieh, Ling-Kai Su, Yung-Hao Hsueh
  • Publication number: 20140054914
    Abstract: An interchangeable vehicle interior lining (100) comprising a moulded base (102) with an inner and an outer surface, prepared for an vehicle interior part (105) onto which the lining (100) is to be assembled; an adhesive (103) applied onto the outer surface of the moulded base (102); a desired decorative material (101) adhered onto the adhesive outer surface of the moulded base (102); and a plurality of fixing means (107) mounted along the periphery of the lining (100) for closely fitting the lining (100) onto the vehicle interior part (105).
    Type: Application
    Filed: August 15, 2011
    Publication date: February 27, 2014
    Applicant: PECCA LEATHER SDN BHD
    Inventors: Hwa Cheng Teoh, Chee Keng Sam, Chen Xiang Wong
  • Publication number: 20120001464
    Abstract: A method for attaching a vehicle seat cover (102a, 102b) onto an original cover of a vehicle seat (101) comprising a step of applying a detachable fixing means (105a, 105b, 105c) onto the outer surface (110) of the original cover of the vehicle seat (101) or the inner surface (107) of the vehicle seat cover (102a, 102b) or both at appropriate location and fixing the inner surface (107) of the vehicle seat cover (102a, 102b) closely onto the outer surface (110) of the original cover of the vehicle seat (101) such that the vehicle seat cover (102a, 102b) closely conforms to the contours of the vehicle seat (101).
    Type: Application
    Filed: May 26, 2009
    Publication date: January 5, 2012
    Inventors: Hwa Cheng Teoh, Wah Leong Teoh
  • Patent number: 7608332
    Abstract: A cathode material particle comprising a plurality of cathode material cores and each cathode material core having plurality of grains and each grain being uniformly covered with a nano-metal oxide layer, wherein a thickness of the nano-metal oxide layer is 1 nm to 100 nm. The cathode material has excellent safety (good thermal stability), high-capacity, good cycleability and high-rate charging or discharging capability.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: October 27, 2009
    Assignee: Industrial Technology Research Institute
    Inventors: Mao-Huang Liu, Jin-Ming Chen, Tzu-Hwa Cheng
  • Publication number: 20090050859
    Abstract: A cathode material particle comprising a plurality of cathode material cores and each cathode material core having plurality of grains and each grain being uniformly covered with a nano-metal oxide layer, wherein a thickness of the nano-metal oxide layer is 1 nm to 100 nm. The cathode material has excellent safety (good thermal stability), high-capacity, good cycleability and-high-rate charging or discharging capability.
    Type: Application
    Filed: October 10, 2008
    Publication date: February 26, 2009
    Applicant: Industrial Technology Research Institute
    Inventors: Mao-Huang Liu, Jin-Ming Chen, Tzu-Hwa Cheng
  • Publication number: 20080299392
    Abstract: Cathode material particles with nano-metal oxide layers on the surface, each cathode material particle includes a cathode material core and a nano-metal oxide layer surrounding the cathode material core. The thickness of the nano-metal oxide layer is of 10 nm to 100 nm. The cathode material has excellent safety, high-capacity, good cycleability and high-rate charging or discharging capability. A method for manufacturing the cathode material particles comprises soaking the cathode material cores in a surface improving agent containing metal salt, drying the surface improving agent to deposit the metal salt on the cores and sintering the cores with lithium hydroxide to form the nano-metal oxide layer on the surface around the core. Thereby, the cathode material particles are formed.
    Type: Application
    Filed: June 14, 2004
    Publication date: December 4, 2008
    Inventors: Mao-Huang Liu, Jin-Ming Chen, Tzu-Hwa Cheng
  • Publication number: 20050145553
    Abstract: A chemical supply system is provided. The present system provides a first system including a first tank for storing a chemical liquid therein and a first filter connecting with the first tank by a first tube and a second tube. A third tube connects the first system with a second system. The second system includes a second tank and a second filter connecting with the second tank by a fourth tube and a fifth tube. A first vent tube connects with the first tank. A second vent tube connects with the second filter.
    Type: Application
    Filed: January 6, 2004
    Publication date: July 7, 2005
    Inventor: Cheng-Hwa Cheng
  • Patent number: 6057559
    Abstract: A laser diode for emitting a coherent beam of light in the blue and/or green portions of the spectrum. The laser diode includes a plurality of layers of II-VI semiconductor forming a pn junction, including at least a first light-guiding layer. A short-period strained-layer superlattice (SPSLS) CdZnSe quantum well active layer is positioned within the pn junction. The layers of II-VI semiconductor are supported by a substrate. First and second electrodes on opposite sides of the layers of II-VI semiconductor couple electrical energy to the laser diode.
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: May 2, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Hwa Cheng, James M. DePuydt, Michael A. Haase, Jun Qiu
  • Patent number: 5698168
    Abstract: A unibody, monolithic, one-piece PBN plasma chamber for an MBE gas plasma source. The chamber has a cylindrical configuration with at least one effusion orifice and a gas inlet opening. The gas inlet opening is preferably communicatively connected to an elongated, tubular inlet member. The inlet member is preferably coupled to a liquid cooled gas source by an intermediary connection member which is preferably constructed of a refxactory metal. The chamber minimizes leakage and maximizes efficiency. A gas plasma source assembly and a method for making the chamber are also disclosed.
    Type: Grant
    Filed: November 1, 1995
    Date of Patent: December 16, 1997
    Assignee: Chorus Corporation
    Inventors: Scott W. Priddy, Hwa Cheng
  • Patent number: 5574296
    Abstract: An electromagnetic radiation transducer is provided having a p-type ZnSe layer and an n-type layer. The p-type ZnSe layer has a net donor to net acceptor ratio (N.sub.D /N.sub.A) of less than or equal to about 0.8. The net acceptor concentration is greater than about 5.times.10.sup.15 cm .sup.-3 and the resistivity is less than 15 .OMEGA.-cm. The p-type ZnSe layer is deposited by doping the ZnSe during fabrication with a neutral free-radical source.
    Type: Grant
    Filed: July 21, 1993
    Date of Patent: November 12, 1996
    Assignee: Minnesota Mining And Manufacturing Company
    Inventors: Robert M. Park, James M. DePuydt, Hwa Cheng, Michael A. Haase