Patents by Inventor Pei Wei Tsai

Pei Wei Tsai 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: 11622485
    Abstract: A pick arm for a pick and place apparatus for electronic devices has a main body having a proximal end whereat the pick arm is mountable onto a pick arm support, and a distal end at which a collet is mounted for holding an electronic device. A first rigid body is located adjacent to the proximal end of the pick arm and a second rigid body is located adjacent to the distal end of the pick arm. The first and second flexures connect the first rigid body to the second rigid body. Moreover, the first flexure is spaced from the second flexure, and the first and second flexures have opposing faces that are arranged substantially parallel to each other. An actuator is operative to apply a biasing force onto the second rigid body so as to bend the first and second flexures relative to the first rigid body for biasing the collet of the pick arm to move.
    Type: Grant
    Filed: September 22, 2021
    Date of Patent: April 4, 2023
    Assignee: ASMPT SINGAPORE PTE. LTD.
    Inventors: Chak Tong Sze, Pei Wei Tsai, Wing Sze Chan, Wai Hing Yung
  • Publication number: 20230085661
    Abstract: A pick arm for a pick and place apparatus for electronic devices has a main body having a proximal end whereat the pick arm is mountable onto a pick arm support, and a distal end at which a collet is mounted for holding an electronic device. A first rigid body is located adjacent to the proximal end of the pick arm and a second rigid body is located adjacent to the distal end of the pick arm. The first and second flexures connect the first rigid body to the second rigid body. Moreover, the first flexure is spaced from the second flexure, and the first and second flexures have opposing faces that are arranged substantially parallel to each other. An actuator is operative to apply a biasing force onto the second rigid body so as to bend the first and second flexures relative to the first rigid body for biasing the collet of the pick arm to move.
    Type: Application
    Filed: September 22, 2021
    Publication date: March 23, 2023
    Inventors: Chak Tong SZE, Pei Wei TSAI, Wing Sze CHAN, Wai Hing YUNG
  • Patent number: 9846193
    Abstract: A semiconductor package testing apparatus comprises a package holder for holding a semiconductor package and which is positionable together with the semiconductor package at a test contactor station. There are probe pins located at the test contactor station for contacting a bottom surface of the semiconductor package and which are configured to apply an upwards force on the semiconductor package during testing of the semiconductor package. A restraining mechanism that is movable from a first position remote from the package holder and a second position over the package holder is configured to restrict lifting of the semiconductor package by the probe pins during testing of the semiconductor package when the restraining mechanism is at its second position.
    Type: Grant
    Filed: May 13, 2015
    Date of Patent: December 19, 2017
    Assignee: ASM TECHNOLOGY SINGAPORE PTE LTD
    Inventors: Chak Tong Sze, Pei Wei Tsai, Cho Hin Cheuk, Si Ming Chan, Kam Sing Lee
  • Publication number: 20150331012
    Abstract: A semiconductor package testing apparatus comprises a package holder for holding a semiconductor package and which is positionable together with the semiconductor package at a test contactor station. There are probe pins located at the test contactor station for contacting a bottom surface of the semiconductor package and which are configured to apply an upwards force on the semiconductor package during testing of the semiconductor package. A restraining mechanism that is movable from a first position remote from the package holder and a second position over the package holder is configured to restrict lifting of the semiconductor package by the probe pins during testing of the semiconductor package when the restraining mechanism is at its second position.
    Type: Application
    Filed: May 13, 2015
    Publication date: November 19, 2015
    Inventors: Chak Tong SZE, Pei Wei TSAI, Cho Hin CHEUK, Si Ming CHAN, Kam Sing LEE
  • Patent number: 8933720
    Abstract: An apparatus for maintaining a conductivity of electrical contacts of a test contactor for testing electronic devices comprises a rotary turret disk having a plurality of test stands operative to hold respective electronic devices, the electronic devices being rotatable by the rotary turret disk to a position of the test contactor to be contacted by the electrical contacts during testing. At least one contactor maintenance stand comprising a maintenance component is located between adjacent test stands on the rotary turret disk, wherein the electrical contacts of the test contactor are adapted to engage the maintenance component so as to automatically clean the electrical contacts and/or verify the conductivity thereof.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: January 13, 2015
    Assignee: ASM Technology Singapore Pte Ltd
    Inventors: Yui Kin Tang, Chak Tong Sze, Pei Wei Tsai, Cho Hin Cheuk, Kut Lam
  • Patent number: 8910775
    Abstract: A transfer apparatus has a conveying track for electronic devices in a row, two vacuum passages to create vacuum forces to hold electronic devices against the conveying track at first and second positions respectively preventing overlapping of electronic devices; and sensors arranged with respect to the conveying track, the first sensor detects presence or absence of the leading electronic device at the first position for removal of the leading electronic device from the conveying track, and the second sensor detects presence or absence of the leading electronic device at a sensor position between the first and second positions as the leading electronic device is conveyed along the conveying track from the second to the first vacuum passage.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: December 16, 2014
    Assignee: ASM Technology Singapore Pte Ltd
    Inventors: Chak Tong Sze, Pei Wei Tsai, Wing Sze Chan, Cho Hin Cheuk, Tsz Chun Chow
  • Patent number: 8749249
    Abstract: A test handler comprises a package support for holding an electronic device in a certain orientation and for transporting the electronic device to a testing station for testing the electronic device. An orientation correction device is actuable and operative to engage the package support and to rotate the package support so as to change the orientation of the electronic device.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: June 10, 2014
    Assignee: ASM Assembly Automation Ltd
    Inventors: Chak Tong Albert Sze, Pei Wei Tsai, Wa Sing Tsang
  • Patent number: 8660322
    Abstract: The passive continuous authentication method uses biometric feedback to perform the authentication processes. Computer software and sensors are provided to acquire, memorize, and authenticate both the user's hard (facial) and soft (clothing) biometric information. A registration phase compels the user to register his/her face image into a registration database. Subsequently, the system permits the user to login the system based on facial recognition of the image presented by an attached webcam of the system. During a computing session the system repetitively authenticates the user's identity by comparing the user's acquired face image (hard biometric) to the registered face image in the database. A clothes color histogram (soft biometric) is also computed. The hard biometric recognition mainly decides the authentication result. Otherwise, clothes color histogram matching takes place to decide the result. When the user leaves the terminal the screen locks up.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: February 25, 2014
    Assignee: King Saud University
    Inventors: Pei-Wei Tsai, Muhammad Khurram Khan
  • Publication number: 20140041996
    Abstract: A transfer apparatus has a conveying track for electronic devices in a row, two vacuum passages to create vacuum forces to hold electronic devices against the conveying track at first and second positions respectively preventing overlapping of electronic devices; and sensors arranged with respect to the conveying track, the first sensor detects presence or absence of the leading electronic device at the first position for removal of the leading electronic device from the conveying track, and the second sensor detects presence or absence of the leading electronic device at a sensor position between the first and second positions as the leading electronic device is conveyed along the conveying track from the second to the first vacuum passage.
    Type: Application
    Filed: August 10, 2012
    Publication date: February 13, 2014
    Inventors: Chak Tong SZE, Pei Wei TSAI, Wing Sze CHAN, Cho Hin CHEUK, Tsz Chun CHOW
  • Patent number: 8631923
    Abstract: A device sorting apparatus 100 is disclosed herein. In a described embodiment, the device sorting apparatus 100 comprises a plurality of bin connectors 120 for coupling to respective bins for storing sorted devices and a rotary distribution module 102 for receiving a device 200 to be sorted and for discharging the device 200 selectively into one of the bin connectors 120 to enable the device 200 to be unloaded to the respective bin. The device sorting apparatus 100 further comprises a sensor 110 coupled to the rotary distribution module 102 for detecting the discharge of the device 200, and which is rotatable together with the rotary distribution module 102; and a rotary transformer 400 for powering the sensor 110.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: January 21, 2014
    Assignee: ASM Technology Singapore Pte Ltd
    Inventors: Chak Tong Sze, Pei Wei Tsai, Wai Hong Sizto, Chunbai Wang, Wai Chuen Gan, Shing Wai Tam
  • Publication number: 20130207684
    Abstract: An apparatus for maintaining a conductivity of electrical contacts of a test contactor for testing electronic devices comprises a rotary turret disk having a plurality of test stands operative to hold respective electronic devices, the electronic devices being rotatable by the rotary turret disk to a position of the test contactor to be contacted by the electrical contacts during testing. At least one contactor maintenance stand comprising a maintenance component is located between adjacent test stands on the rotary turret disk, wherein the electrical contacts of the test contactor are adapted to engage the maintenance component so as to automatically clean the electrical contacts and/or verify the conductivity thereof.
    Type: Application
    Filed: February 10, 2012
    Publication date: August 15, 2013
    Inventors: Yui Kin TANG, Chak Tong SZE, Pei Wei TSAI, Cho Hin CHEUK, Kut LAM
  • Publication number: 20130051632
    Abstract: The passive continuous authentication method uses biometric feedback to perform the authentication processes. Computer software and sensors are provided to acquire, memorize, and authenticate both the user's hard (facial) and soft (clothing) biometric information. A registration phase compels the user to register his/her face image into a registration database. Subsequently, the system permits the user to login the system based on facial recognition of the image presented by an attached webcam of the system. During a computing session the system repetitively authenticates the user's identity by comparing the user's acquired face image (hard biometric) to the registered face image in the database. A clothes color histogram (soft biometric) is also computed. The hard biometric recognition mainly decides the authentication result. Otherwise, clothes color histogram matching takes place to decide the result. When the user leaves the terminal the screen locks up.
    Type: Application
    Filed: August 25, 2011
    Publication date: February 28, 2013
    Applicant: KING SAUD UNIVERSITY
    Inventors: PEI-WEI TSAI, MUHAMMAD KHURRAM KHAN
  • Publication number: 20110248738
    Abstract: A wafer processing apparatus used for the testing of electronic devices comprises first and second clampers movably mounted on a shaft, each clamper being configured for holding a wafer carrier on which a wafer is mounted. Clamping fingers on each of the first and second clampers are operative to clamp onto the wafer carrier to hold the wafer carriers, and the clampers are operative to move the wafer carriers reciprocally between a loading position and a wafer processing location for processing the wafers.
    Type: Application
    Filed: April 4, 2011
    Publication date: October 13, 2011
    Inventors: Chak Tong SZE, Pei Wei TSAI, Tin Yi CHAN, Wai Hong SIZTO, Cho Hin CHEUK
  • Patent number: 7973259
    Abstract: A sorting system is provided for electronic components such as LED devices which includes a testing station for testing and determining a characteristic of each electronic component. A first tray has a plurality of receptacles for receiving tested electronic components and a second tray has more receptacles than the first tray for receiving tested electronic components. Electronic components comprising tested characteristics that occur with greater frequency are loaded into the receptacles of the first tray and electronic components comprising tested characteristics that occur with lower frequency are loaded into the receptacles of the second tray.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: July 5, 2011
    Assignee: ASM Assembly Automation Ltd
    Inventors: Pei Wei Tsai, Chak Tong Sze, Sai Kit Wong, Fong Shing Yip
  • Patent number: 7851721
    Abstract: A device handler for testing and sorting electronic devices has a testing station operative to test the electronic devices and to classify them according to different binning characteristics. A buffer assembly receives electronic devices which have been classified at the testing station, and the buffer assembly further comprises a first loading region having a plurality of receptacles and a second loading region having a plurality of receptacles. An output station is operative to unload electronic devices according to their different binning characteristics from either one of the first or second loading region of the buffer assembly for storage while electronic devices are being loaded onto the other loading region.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: December 14, 2010
    Assignee: ASM Assembly Automation Ltd
    Inventors: Chak Tong Albert Sze, Pei Wei Tsai, Ho Yin Wong, Tin Yi Chan
  • Publication number: 20100209219
    Abstract: A device handler for testing and sorting electronic devices has a testing station operative to test the electronic devices and to classify them according to different binning characteristics. A buffer assembly receives electronic devices which have been classified at the testing station, and the buffer assembly further comprises a first loading region having a plurality of receptacles and a second loading region having a plurality of receptacles. An output station is operative to unload electronic devices according to their different binning characteristics from either one of the first or second loading region of the buffer assembly for storage while electronic devices are being loaded onto the other loading region.
    Type: Application
    Filed: February 17, 2009
    Publication date: August 19, 2010
    Inventors: Chak Tong SZE, Pei Wei TSAI, Ho Yin WONG, Tin Yi CHAN
  • Patent number: 7733114
    Abstract: A test handler is provided for testing electronic devices having light-emitting elements. Electronic devices are mounted at a loading position, optical measurements are conducted at a test contact position where a testing device is located for optical communication with the light-emitting elements and then tested electronic devices are removed at an unloading position. Multiple test contactors hold the electronic devices and move them to and through the loading position, test contact position and unloading position in sequence. Each test contactor comprises a device contact point including electrical conductors which are connected to electrical contacts of the electronic device when the electronic device is mounted at the device contact point, and a retaining mechanism grips the electronic device at the device contact point such that the retaining mechanism does not obstruct the optical communication between the testing device and the light-emitting element at the test contact position.
    Type: Grant
    Filed: October 21, 2008
    Date of Patent: June 8, 2010
    Assignee: ASM Assembly Automation Ltd.
    Inventors: Chak Tong Albert Sze, Pei Wei Tsai, Sai Kit Wong, Wai Hong Sizto
  • Publication number: 20100097075
    Abstract: A test handler comprises a package support for holding an electronic device in a certain orientation and for transporting the electronic device to a testing station for testing the electronic device. An orientation correction device is actuable and operative to engage the package support and to rotate the package support so as to change the orientation of the electronic device.
    Type: Application
    Filed: October 14, 2009
    Publication date: April 22, 2010
    Inventors: Chak Tong Albert SZE, Pei Wei TSAI, Wa Sing TSANG
  • Publication number: 20100097083
    Abstract: A test handler is provided for testing electronic devices having light-emitting elements. Electronic devices are mounted at a loading position, optical measurements are conducted at a test contact position where a testing device is located for optical communication with the light-emitting elements and then tested electronic devices are removed at an unloading position. Multiple test contactors hold the electronic devices and move them to and through the loading position, test contact position and unloading position in sequence. Each test contactor comprises a device contact point including electrical conductors which are connected to electrical contacts of the electronic device when the electronic device is mounted at the device contact point, and a retaining mechanism grips the electronic device at the device contact point such that the retaining mechanism does not obstruct the optical communication between the testing device and the light-emitting element at the test contact position.
    Type: Application
    Filed: October 21, 2008
    Publication date: April 22, 2010
    Inventors: Chak Tong Albert SZE, Pei Wei TSAI, Sai Kit WONG, Wai Hong SIZTO
  • Patent number: 7458761
    Abstract: An apparatus and method is provided for flipping electronic components in the sense of changing their orientation, such as for changing the orientation of electronic components between ‘live bug’ and ‘dead bug’ orientations. The apparatus comprises a rotary device that is configured to receive the electronic component and a force actuator operative to bias the electronic component into engagement with the rotary device. A driving mechanism coupled to the rotary device is operative to rotate said rotary device for changing the orientation of the electronic component, after which an ejector is used to eject the electronic component from the rotary device after changing the orientation of the electronic component.
    Type: Grant
    Filed: September 22, 2005
    Date of Patent: December 2, 2008
    Assignee: ASM Assembly Automation Ltd.
    Inventors: Chak Tong Albert Sze, Pei Wei Tsai, Hiu Fai Ho