Wensen Li

Title: Wensen Li: Innovator in Magnetic Disk Systems

Introduction

Wensen Li is a notable inventor based in Fremont, CA, who has made significant contributions to the field of magnetic disk systems. With a total of 2 patents, his work focuses on enhancing the efficiency and effectiveness of head coil manufacturing processes.

Latest Patents

One of Wensen Li's latest patents involves an innovative etching process designed to selectively remove copper plating seed layers. In magnetic disk systems, head coils are typically formed through electroplating onto a seed layer while using a photoresist mask. The challenge lies in removing the seed layer from all areas except beneath the coil itself. Li's invention addresses this issue by utilizing an etching solution of ammonium persulfate, enhanced with the complexing agent 1,4,8,11 tetraazundecane. This combination suppresses the reduction of copper, thereby increasing the dissolution rate of copper while decreasing that of nickel-iron. The patent outlines two methods for implementation: adding the complexing agent directly to the ammonium persulfate or introducing it through a dipping process prior to conventional etching.

Career Highlights

Wensen Li is currently employed at Headway Technologies, Incorporated, where he continues to develop innovative solutions in the field of magnetic disk technology. His expertise and contributions have positioned him as a key player in advancing the technology used in data storage systems.

Collaborations

Throughout his career, Wensen Li has collaborated with notable colleagues, including Si-Tuan Lam and Henry C. Chang. These partnerships have fostered a creative environment that encourages innovation and the development of cutting-edge technologies.

Conclusion

Wensen Li's work in the field of magnetic disk systems exemplifies the spirit of innovation and dedication to improving technology. His patents reflect a commitment to advancing the efficiency of manufacturing processes, making a lasting impact on the industry.