Kai Wu

Title: Innovations of Inventor Kai Wu

Introduction

Kai Wu is a notable inventor based in Hsinchu, Taiwan. He has made significant contributions to the field of technology, particularly in the areas of aperture design and spectroscopic overlay metrology. With a total of 4 patents to his name, his work has had a considerable impact on measurement accuracy and optical systems.

Latest Patents

One of his latest patents is titled "Aperture design and methods thereof." This invention involves a method for performing DBO measurements utilizing apertures with a single pole. The method includes using a first aperture plate to measure X-axis diffraction of a composite grating. The first aperture plate features a pair of radiation-transmitting regions aligned with the optical axis. A complementary second aperture plate is then used to measure Y-axis diffraction, ensuring that the second diametrical axis is substantially perpendicular to the first.

Another significant patent is "Spectroscopic overlay metrology." This system and its corresponding methods aim to improve overlay measurement accuracy and minimize asymmetry-induced errors. The method generates a diffraction spectrum from an overlay target using incident radiation of multiple wavelengths. It collects intensity information associated with this spectrum and generates overlay information that accounts for asymmetry-induced overlay errors. The method also includes optimizing an overlay recipe based on the generated overlay information.

Career Highlights

Kai Wu has worked with prominent companies in the semiconductor industry, including Taiwan Semiconductor Manufacturing Company Ltd. and Global Advanced Packaging Technology Hong Kong Limited. His experience in these organizations has allowed him to develop and refine his innovative ideas.

Collaborations

Throughout his career, Kai Wu has collaborated with talented individuals such as Hung-Chih Hsieh and Kai-Hsiung Chen. These collaborations have contributed to the advancement of his research and inventions.

Conclusion

Kai Wu's contributions to the fields of aperture design and spectroscopic overlay metrology demonstrate his innovative spirit and dedication to improving measurement technologies. His patents reflect a commitment to enhancing accuracy and efficiency in optical systems.