Yuhturng Liu

Title: Innovations of Yuhturng Liu

Introduction

Yuhturng Liu is a notable inventor based in Kaohsiung, Taiwan. He has made significant contributions to the field of chemical mechanical polishing and fabrication methods. With a total of 2 patents, his work has advanced the technology used in substrate polishing and isolation structures.

Latest Patents

One of his latest patents is titled "Polishing pad and process of chemical mechanical use thereof." This invention describes a method for polishing a substrate that has a layer to be polished. The process involves a pre-polishing step using a softer polishing pad to remove partially raised parts of the layer before using a harder polishing pad for the final polishing. The flexible and porous nature of the first polishing pad allows for increased contact areas, which enhances the polishing efficiency. This innovation reduces processing time, decreases slurry consumption, and significantly cuts down costs.

Another important patent by Liu is the "Method of fabricating shallow trench isolation." This method outlines the steps for creating a shallow trench isolation structure. It involves forming multiple layers on a substrate, including a pad oxide layer and a mask layer. A trench is then created, followed by the formation of a liner oxide layer. The process is carefully controlled to ensure optimal thicknesses for effective optical endpoint detection. This meticulous approach enhances the precision of the fabrication process.

Career Highlights

Yuhturng Liu is currently employed at Macronix International Co., Ltd., where he continues to innovate in the field of semiconductor technology. His expertise in chemical mechanical polishing and isolation methods has made him a valuable asset to the company.

Collaborations

Liu has collaborated with notable colleagues such as Chi-Tung Huang and Kuang-Chao Chen. Their combined efforts have contributed to advancements in their respective fields.

Conclusion

Yuhturng Liu's contributions to the field of invention, particularly in polishing and isolation methods, demonstrate his innovative spirit and technical expertise. His patents reflect a commitment to improving processes and reducing costs in semiconductor manufacturing.