T H P Chang

Title: T H P Chang: Innovator in Microcolumn Technology

Introduction

T H P Chang is a notable inventor based in Foster City, CA (US). He has made significant contributions to the field of microcolumn technology, holding 2 patents that showcase his innovative approach to precision alignment in electronic devices.

Latest Patents

One of his latest patents is focused on the precision alignment of a microcolumn tip to a micron-size extractor aperture. This method and accompanying apparatus are designed for aligning an electron emitter with an extractor hole of a microcolumn. The invention involves microfabricating four V-grooves on a chip, which serve as references for aligning the electron emitter with the extractor hole. The V-grooves are defined together with a window for forming the membrane, and their bottoms are situated on two axes that intersect at a right angle, defining a center point for the extractor hole. This precise alignment is achieved because the extractor hole is formed with reference to the V-grooves, and the thickness of the chip is used as the spacing reference between the emitter and the extractor.

Career Highlights

T H P Chang is currently employed at Etec Systems, Inc., where he continues to develop innovative technologies. His work has significantly impacted the field of microelectronics, particularly in enhancing the precision of electronic components.

Collaborations

Throughout his career, T H P Chang has collaborated with talented individuals such as Ho-Seob Kim and Kim Yang Lee. These collaborations have contributed to the advancement of his research and the successful development of his patents.

Conclusion

T H P Chang is a distinguished inventor whose work in microcolumn technology has led to significant advancements in precision alignment methods. His contributions continue to influence the field and inspire future innovations.