Frank J Grunthaner

Title: **Frank J Grunthaner: Pioneering Innovations in Electron Spectrometry**

Introduction

Frank J Grunthaner, based in Glendale, CA, is an accomplished inventor renowned for his contributions to the field of electron spectrometry. With a total of nine patents to his name, Grunthaner has demonstrated significant expertise and innovation, particularly in the design of advanced electron transmissive technologies.

Latest Patents

Among his latest inventions, Grunthaner has developed an "Electron transmissive window usable with high pressure electron spectrometry." This innovative vacuum window is capable of transmitting keV electrons, which is crucial for high-pressure electron analysis, such as X-ray Photoelectron Spectroscopy (XPS) and Auger Electron Spectroscopy (AES). The unique design allows for the positioning of samples outside the UHV analyzer chamber, enabling analysis within a controlled gas environment close to the window. Notably, the window has been crafted with a grid formed from a support layer and a thin window layer, with a preferred thickness of 2 to 3 nanometers. The fabrication process involves depositing these layers on a silicon wafer, which is then lithographically defined and backside etched to expose the necessary components.

Another one of Grunthaner's noteworthy innovations is the "Array of micro-machined mass energy micro-filters for charged particles." This energy filter utilizes a stack of micro-machined wafers, each equipped with multiple apertures that facilitate charged particle paths. The design includes focusing electrodes that are expertly engineered to guide charged particles through the apertures, complete with entrance and exit orifices. The ability to bias the focusing electrodes with an electrostatic potential corresponding to a specific energy pass band further enhances the filter's functionality.

Career Highlights

Throughout his career, Grunthaner has made significant contributions while working with prestigious organizations, including the California Institute of Technology and The United States of America as represented by the Administrator. His work has consistently pushed the boundaries of electron analysis technology, establishing him as a pioneering figure in the field.

Collaborations

Grunthaner has had the opportunity to collaborate with notable professionals in his field, including Paula J Grunthaner and Michael H Hecht. These collaborations reflect his commitment to advancing research and fostering innovation through teamwork and shared expertise.

Conclusion

Frank J Grunthaner’s work exemplifies the essence of innovation in the realm of electron spectrometry. His patents stand as a testament to his creativity and technical prowess, contributing significantly to advancements in charged particle analysis and opening new avenues for research and development in this critical area of study.