Patents by Inventor Petrus Antonius Van Der Hemden

Petrus Antonius Van Der Hemden 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).

  • Write assist stack to reduce resistance and improve reliability
    Patent number: 11417356
    Abstract: The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a main pole, a hot seed layer, and a write assist stack disposed between the main pole and the hot seed layer. In one embodiment, the write assist stack comprises a seed layer, a spin torque layer, and a notch layer. One or more of the seed layer and the notch layer have a first cross-track width and the spin torque layer has a second cross-track width less than the first cross track width. In another embodiment, the write assist stack comprises a seed layer, a spin polarization layer, and a notch layer. One or more of the seed layer and the notch layer have a first cross-track width and the spin polarization layer has a second cross-track width less than the first cross track width.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: August 16, 2022
    Assignee: Western Digital Technologies, Inc.
    Inventors: Muhammad Asif Bashir, Alexander Goncharov, Petrus Antonius Van Der Hemden, Aron Pentek, Yi Zhang, Venkatesh Chembrolu