Stephen Kow Chiew Kuan

Title: Innovations of Stephen Kow Chiew Kuan

Introduction

Stephen Kow Chiew Kuan is a notable inventor based in Singapore, SG. He has made significant contributions to the field of disc drive technology, holding 2 patents that enhance the performance and reliability of storage systems. His work is characterized by innovative approaches to servo control systems and calibration methods.

Latest Patents

One of his latest patents is titled "Real-time automatic loop-shaping for a disc drive servo control system." This invention provides an apparatus and method for improving servo loop performance in a disc drive storage system. The servo loop includes a voice coil motor actuator that moves the head in response to a received servo control signal. A sensor located in the head senses servo information on the disc and produces a servo signal. This servo signal is combined with a reference signal to produce a position error signal. A servo controller receives this position error signal and produces the servo control signal. The controller includes a drive signal generator that produces a driving energy signal based on the position error signal. A vibration damping circuit then generates the servo control signal. Notably, a real-time adaptive loop shaping circuit detects vibrations in the position error signal and adjusts parameters of the vibration damping circuit's transfer function to reduce vibrations at various frequencies.

Another significant patent is the "Method for calibrating MR head geometry in self-servo writing disc drives." This method involves calibrating magnetoresistive (MR) head geometry for a product head in a self-servo writing disc drive. The process includes writing a first burst at an inner diameter of a disc surface using the write head and reading it with the MR read head. The first read amplitude is determined, which helps decide the subsequent inner diameter steps to perform. This ultimately leads to determining the read head width, write head width, and the read-write offset between the two heads.

Career Highlights

Stephen Kow Chiew Kuan is currently employed at Seagate Technology Incorporated, a leading company in data storage solutions. His work at Seagate has allowed him to focus on innovative technologies that improve disc drive performance and reliability.

Collaborations

Stephen has collaborated with notable coworkers such as Qiang Bi and Kevin Arthur Gomez. Their combined expertise contributes to the advancement of technology in the field of data storage.

Conclusion

Stephen Kow Chiew Kuan is a distinguished inventor whose work has significantly impacted