Patents by Inventor ZHI CHAI

ZHI CHAI 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: 10643882
    Abstract: A ceramic ring for supporting a wafer, comprising: a body; and an annular recess provided in the center of the body, the annular recess having a bottom surface and a buffer portion extending upwards from the bottom surface to the surface of the body. The ceramic ring can ensure reliability in positioning the wafer, and can prevent the edge side of the wafer from generating particles by contacting the ceramic ring.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: May 5, 2020
    Assignee: PIOTECH CO., LTD.
    Inventors: Xuyen Pham, Zhi Chai, Shicai Fang
  • Publication number: 20200101556
    Abstract: A chassis welding device for welding brackets as standard members to a body of a chassis includes a frame, a first transferring member, a plurality of loading mechanisms, a plurality of carriers, a conveying member, a shifting member, and a spot welder. The loading mechanism transfers standard members to individual preset positions on the carrier to face the solder joints on the standard members away from the carrier. The first transferring member transports the carrier to the shifting member. The shifting member transfers the carrier from the first transferring member to the spot welder. The conveying member transfers the body into contact with the solder joints. The spot welder applies heat to melt the solder joints to bond the standard members to the body.
    Type: Application
    Filed: July 8, 2019
    Publication date: April 2, 2020
    Inventors: CHUNG CHAI, YU-MING XIAO, LIN DING, ZHI-BING LI
  • Publication number: 20180053682
    Abstract: A ceramic ring for supporting a wafer, comprising: a body; and an annular recess provided in the center of the body, the annular recess having a bottom surface and a buffer portion extending upwards from the bottom surface to the surface of the body. The ceramic ring can ensure reliability in positioning the wafer, and can prevent the edge side of the wafer from generating particles by contacting the ceramic ring.
    Type: Application
    Filed: August 18, 2017
    Publication date: February 22, 2018
    Inventors: XUYEN PHAM, ZHI CHAI, SHICAI FANG