Patents by Inventor Kejian Wu

Kejian Wu 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).

  • WELDING METHOD OF DEMETALLIZED CERAMIC SUBSTRATE HAVING SURFACE CAPILLARY MICROGROOVE STRUCTURE
    Publication number: 20220293480
    Abstract: The present invention discloses a welding method of a demetallized ceramic substrate having a surface capillary microgroove structure. The demetallized ceramic substrate includes a ceramic substrate main body and surface capillary microstructures. The surface capillary microstructures are arranged on two lateral sides of the ceramic substrate main body and the surface capillary microstructures specifically are capillary microgrooves. The welding method includes the following steps: fixing a chip to an upper surface of the demetallized ceramic substrate having the surface capillary microgroove structure, fixing the ceramic substrate with the chip to a printed circuit board having a bonding pad, and placing melted solder on the bonding pad, and driving the solder to ascend to an electrode of the chip from the bonding pad in a lower layer by means of a capillary force, thereby realizing an electrical connection between the chip and the printed circuit board.
    Type: Application
    Filed: November 14, 2019
    Publication date: September 15, 2022
    Applicants: SOUTH CHINA UNIVERSITY OF TECHNOLOGY, GUANGDONG LUCKYSTAR ELECTRONIC TECHNOLOGY CO., LTD, SHENZHEN GOOD-MACHINE AUTOMATIC EQUIPMENT CO., LTD
    Inventors: Zongtao LI, Yong TANG, Hong WANG, Shudong YU, Kejian WU, Guanwei LIANG, Xinrui DING
  • Composition of natural antioxidants for the stabilization of polyunsaturated oils
    Patent number: 5077069
    Abstract: The present invention provides for a composition of natural antioudants comprising tocopherol, ascorbic acid, citric acid and phospholepeds which are useful in oxidation of oils.
    Type: Grant
    Filed: January 7, 1991
    Date of Patent: December 31, 1991
    Assignee: Kabi Pharmacia AB
    Inventors: Stephen S. Chang, Kejian Wu