Seong Hwon Yu

Title: Seong Hwon Yu: Innovator in Hard Disk Drive Technology

Introduction

Seong Hwon Yu is a notable inventor based in San Jose, CA, who has made significant contributions to the field of hard disk drive technology. With a focus on defect management schemes, his work has led to advancements that enhance the reliability and performance of data storage devices. He holds 2 patents that reflect his innovative approach to solving complex engineering challenges.

Latest Patents

One of his latest patents is titled "Servo defect management scheme in hard disk drives." This patent describes a system for detecting various defect types on the surface of a disk in a hard disk drive. The system utilizes information from servo bits to determine if a sector contains a physical defect. When a defect is identified, the sector's write gate is disabled, and its burst signal data is ignored for track following purposes. Additionally, large changes in Position Error Signal (PES) are used to identify closure spike defects, which are managed by providing a compensation signal to improve track following. High PES values signal a third defect type, where the sector is mapped as defective, but burst signals continue to be used for track following.

Another significant patent is "Method and apparatus to detect and manage servo sectors with defect on servo pattern area in hard disk drives." This invention outlines a method for detecting defects on the surface of a disk with multiple tracks. The method involves reading servo bits for several sectors and determining a burst measure for at least one sector. By comparing this burst measure to a reference value derived from the burst signals of multiple sectors, potential defects can be identified. A sector is mapped as defective if its burst measure differs from the reference value by at least 5 percent.

Career Highlights

Seong Hwon Yu is currently employed at Samsung Electronics Co., Ltd., where he continues to innovate in the field of hard disk drives. His work has been instrumental in developing technologies that improve data integrity and storage efficiency.

Collaborations

Throughout his career, Seong Hwon Yu has collaborated with talented individuals such as Sang Hoon Chu and Jun Seok Shim. These collaborations have fostered an environment of innovation and have contributed to the success of their projects.

Conclusion

Seong Hwon Yu is a distinguished inventor whose work in hard disk drive technology has led to significant advancements in defect management. His patents demonstrate