Company Filing History:
Years Active: 2009-2011
Title: Sayaka Nojiri: Innovator in Disk Drive Technology
Introduction
Sayaka Nojiri is a prominent inventor based in Kanagawa, Japan. She has made significant contributions to the field of disk drive technology, holding a total of 4 patents. Her work focuses on enhancing the safety and efficiency of disk drive devices.
Latest Patents
One of her latest patents is titled "Disk drive device and control method of unloading corresponding to fall detection in disk drive device." This invention improves safety against falls of disk drive devices. In this embodiment, when a hard disk drive (HDD) detects a fall, it unloads the head slider from above the disk to a standby position. The HDD checks the fall detection data during a seek start, and if a fall is indicated, the controller unloads the actuator. Additionally, the HDD issues a seek fake error upon seek completion and conducts a fall check during the error recovery process.
Another notable patent is "Disk drive and calibration method therefor." This invention helps 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, using the VCM current and detected back EMF voltage.
Career Highlights
Sayaka Nojiri is currently employed at Hitachi Global Storage Technologies Netherlands B.V. Her work at this company has been instrumental in advancing disk drive technology and ensuring the reliability of storage devices.
Collaborations
She has collaborated with notable colleagues, including Nobuhiko Wasa and Kenichi Kuramoto, contributing to various innovative projects in the field.
Conclusion
Sayaka Nojiri's contributions to disk drive technology through her patents and collaborations highlight her role as a leading inventor in this field. Her work continues to influence the development of safer and more efficient storage solutions.