Huajun Liu

Title: Innovations and Contributions of Inventor Huajun Liu

Introduction

Huajun Liu is a notable inventor based in Singapore, recognized for his significant contributions to the field of non-destructive testing and optical measurement technologies. With a total of six patents to his name, Liu has made strides in developing innovative methods that enhance the accuracy and efficiency of testing materials.

Latest Patents

One of Liu's latest patents is a shearography testing method and system using shaped excitation light having at least one curved line. This non-contact, non-destructive testing method involves spatially and/or temporally controlling laser excitation light based on a predetermined pattern. The laser light is projected onto the surface of a test object, generating acoustic waves that apply stress loading to the object. The method includes imaging the test object with and without stress loading using shearography imaging, followed by analyzing the imaging data to detect any defects in the test object.

Another significant patent is the system and method of measuring the refractive index of EUV mask absorbers. This invention discloses apparatus and methods for measuring the refractive index of absorber materials used in EUV phase shift masks. The method utilizes reference measurements and a series of reflectance measurements across various EUV wavelengths and thickness values to accurately determine the refractive index of the absorber material.

Career Highlights

Throughout his career, Huajun Liu has worked with prominent companies in the semiconductor industry, including Globalfoundries Singapore Pte. Ltd. and Applied Materials, Inc. His experience in these organizations has allowed him to apply his innovative ideas and contribute to advancements in technology.

Collaborations

Liu has collaborated with several professionals in his field, including Yu Jau Chen and Siow Lee Chwa. These collaborations have fostered an environment of innovation and have led to the development of groundbreaking technologies.

Conclusion

Huajun Liu's contributions to the field of non-destructive testing and optical measurement are noteworthy. His innovative patents and collaborations reflect his commitment to advancing technology and improving testing methodologies. Liu's work continues to influence the industry and inspire future innovations.