Patents by Inventor Erwin Mochtar Wijaya

Erwin Mochtar Wijaya 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).

  • Methods of measuring friction between a slider and ramp, and related systems
    Patent number: 10989649
    Abstract: Measuring ramp friction in a disk drive including receiving a lift tab ramp load time profile for a voice coil motor and determining a load torque profile for a lift tab on the ramp based at least on the received ramp load time profile. The measuring also includes receiving a lift tab ramp unload time profile for the voice coil motor and determining an unload torque profile for the lift tab on the ramp based at least on the received ramp unload time profile. The measuring also includes calculating a ramp friction torque component based on the determined load torque profile and unload torque profile.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: April 27, 2021
    Assignee: Seagate Technology LLC
    Inventors: Jian Chen, Xiong Liu, Wei Sung Lee, Erwin Mochtar Wijaya
  • METHODS OF MEASURING FRICTION BETWEEN A SLIDER AND RAMP, AND RELATED SYSTEMS
    Publication number: 20190178785
    Abstract: Measuring ramp friction in a disk drive including receiving a lift tab ramp load time profile for a voice coil motor and determining a load torque profile for a lift tab on the ramp based at least on the received ramp load time profile. The measuring also includes receiving a lift tab ramp unload time profile for the voice coil motor and determining an unload torque profile for the lift tab on the ramp based at least on the received ramp unload time profile. The measuring also includes calculating a ramp friction torque component based on the determined load torque profile and unload torque profile.
    Type: Application
    Filed: December 13, 2017
    Publication date: June 13, 2019
    Inventors: Jian Chen, Xiong Liu, Wei Sung Lee, Erwin Mochtar Wijaya