Company Filing History:
Years Active: 2008-2010
Title: Nobuhiko Wasa: Innovator in Disk Drive Technology
Introduction
Nobuhiko Wasa is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of disk drive technology, holding a total of 5 patents. His work focuses on improving the performance and reliability of hard disk drives through innovative servo control methods.
Latest Patents
Wasa's latest patents include a "Disk drive device and servo control method thereof." This invention addresses the need for appropriate servo control in response to detected vibrations in disk drive devices equipped with vibration sensors. The hard disk drive (HDD) can switch between a correction servo mode, which performs vibration correction during head positioning, and a normal servo mode, which does not. The HDD determines servo positioning accuracy based on measured positional error signals and compares the accuracy between the two modes to select the one with higher precision.
Another notable patent is the "Disk drive and calibration method therefor." This invention aims to prevent destabilization in voice coil motor (VCM) velocity control. In this embodiment, a hard disk controller/multiprocessing unit (HDC/MPU) calibrates a correction operational coefficient of a detected back electromotive force (EMF) voltage before unloading. The calibration occurs while the actuator is pivoting, ensuring optimal performance.
Career Highlights
Nobuhiko Wasa is currently employed at Hitachi Global Storage Technologies Netherlands B.V. His work at this company has allowed him to develop cutting-edge technologies that enhance the functionality of disk drives. His innovative approaches have positioned him as a key figure in the industry.
Collaborations
Wasa has collaborated with notable coworkers, including Sayaka Nojiri and Kenichi Kuramoto. Their combined expertise has contributed to the successful development of advanced disk drive technologies.
Conclusion
Nobuhiko Wasa's contributions to disk drive technology through his patents and collaborative efforts have significantly impacted the industry. His innovative solutions continue to enhance the performance and reliability of hard disk drives, showcasing his dedication to advancing technology.