Ji Heum Yoo

Title: The Innovations of Ji Heum Yoo

Introduction

Ji Heum Yoo is a prominent inventor based in Daejeon, South Korea. He has made significant contributions to the field of materials science, particularly in the development of advanced resin compositions. With a total of 3 patents to his name, Yoo's work has garnered attention for its innovative approaches and practical applications.

Latest Patents

One of Ji Heum Yoo's latest patents is focused on an alkali-soluble resin and a negative-type photosensitive resin composition that incorporates this resin. The alkali-soluble resin is prepared using a polyfunctional thiol compound as a chain transfer agent, resulting in a resin with lower viscosity compared to others of the same molecular weight. This innovation allows for a more efficient use of the photosensitive resin composition, effectively reducing the height of stepped portions in photoresist patterns.

Another notable patent involves a fluorene-based polymer containing urethane groups, along with its preparation method. This novel polymer is created by condensing a diol compound with a diisocyanate, followed by a reaction with an acid anhydride to introduce desired acid groups. The resulting negative-type photosensitive resin composition, which includes this fluorene-based polymer as a binder resin, exhibits improved chemical resistance, good development margin, and high sensitivity.

Career Highlights

Ji Heum Yoo is currently employed at LG Chem, Ltd., a leading chemical company known for its innovative materials and technologies. His work at LG Chem has allowed him to focus on developing cutting-edge materials that have applications in various industries, including electronics and manufacturing.

Collaborations

Throughout his career, Yoo has collaborated with talented individuals such as Han Soo Kim and Min Young Lim. These collaborations have contributed to the advancement of his research and the successful development of his patented technologies.

Conclusion

Ji Heum Yoo's contributions to the field of materials science through his innovative patents highlight his expertise and dedication to advancing technology. His work continues to influence the development of new materials that are essential for modern applications.