Patents Assigned to ADC Tech International Ltd.
  • Patent number: 10522295
    Abstract: A system is disclosed for restoring a surface field potential of an electret material. An oscillator generates an oscillating output, and a power amplifier amplifies the oscillating output. A step-up transformer generates a high voltage alternating current output from the amplified oscillating output, and a polarity controller generates one of a positive pulsating output and a negative pulsating output from the high voltage alternating current output.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: December 31, 2019
    Assignee: ADC TECH INTERNATIONAL LTD.
    Inventor: William S. H. Cheung
  • Patent number: 9913998
    Abstract: An air purifier having an electret module for capturing airborne particles, the electret module including an electret element disposed within a housing and an adhesive layer coupled to the housing to capture airborne particles, whereby the static field of the electret attracts the airborne particles, which subsequently adhere to the adhesive layer.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: March 13, 2018
    Assignee: ADC TECH INTERNATIONAL LTD
    Inventor: William S. H. Cheung
  • Patent number: 9842701
    Abstract: A system is disclosed for restoring a surface field potential of an electret material. An oscillator generates an oscillating output, and a power amplifier amplifies the oscillating output. A step-up transformer generates a high voltage alternating current output from the amplified oscillating output, and a polarity controller generates one of a positive pulsating output and a negative pulsating output from the high voltage alternating current output.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: December 12, 2017
    Assignee: ADC TECH INTERNATIONAL LTD
    Inventor: William S. H. Cheung
  • Patent number: 9230736
    Abstract: An electronic component comprising a first electrode, a second electrode, and a plurality of ball spacers is disclosed. The first electrode includes a plurality of first through holes formed according to a pattern. The second electrode includes a plurality of second through holes formed according to the pattern. Conductive surfaces of the first and second electrode face each other and the first through holes align with the second through holes. The plurality of ball spacers is disposed between the first and second electrodes. Each ball spacer is disposed between and partially disposed within pairs of aligned through holes.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: January 5, 2016
    Assignee: ADC TECH INTERNATIONAL LTD.
    Inventor: William S. H. Cheung
  • Publication number: 20140150797
    Abstract: An air purifier having an electret module for capturing airborne particles, the electret module including an electret element disposed within a housing and an adhesive layer coupled to the housing to capture airborne particles, whereby the static field of the electret attracts the airborne particles, which subsequently adhere to the adhesive layer.
    Type: Application
    Filed: March 9, 2012
    Publication date: June 5, 2014
    Applicant: ADC TECH INTERNATIONAL LTD.
    Inventor: William S.H. Cheung
  • Patent number: 7813105
    Abstract: An electronic component and method for manufacture thereof is disclosed. A plurality of electrodes are positioned in stacked relation to form an electrode stack. The stack may include as few as two electrodes, but more may be used depending on the number of subcomponents desired. Spacing between adjacent electrodes is determined by removable spacers during fabrication. The resulting space between adjacent electrodes is substantially filled with gaseous matter, which may be an actual gaseous fill, air, or a reduced pressure gas formed through evacuation of the space. Further, adjacent electrodes are bonded together to maintain the spacing. A casing is formed to encapsulate the stack, with first and second conducting surfaces remaining exposed outside the casing. The first conducting surface is electrically coupled to a first of the electrodes, and the second conducting surface is electrically coupled to a second of the electrodes.
    Type: Grant
    Filed: February 12, 2008
    Date of Patent: October 12, 2010
    Assignee: ADC Tech International Ltd.
    Inventor: William S. Cheung