Location History:
- Alexandria, VA (US) (1977)
- Burke, VA (US) (1981)
Company Filing History:
Years Active: 1977-1981
Title: Edward M Yee: Innovator in Photocathode Technology
Introduction
Edward M Yee is a notable inventor based in Alexandria, VA (US). He has made significant contributions to the field of photocathode technology, holding 2 patents that showcase his innovative approaches. His work primarily focuses on methods that enhance the performance and efficiency of photocathodes.
Latest Patents
One of his latest patents is titled "Method of making negative electron affinity photocathode." This invention describes a method for creating transmission mode glass-sealed negative electron affinity (NEA) gallium arsenide (GaAs) photocathodes. The process utilizes germanium (Ge) as the seed crystal, along with multilayers of GaAs and gallium aluminum arsenide (GaAlAs) grown by metal alkyl-hydride vapor-phase epitaxy. In this configuration, the GaAs acts as the photoemitting layer, while the GaAlAs serves as the passivating layer. The combination of Ge, GaAs, and GaAlAs is sealed to a glass support substrate, which functions as the input window for the device. Ultimately, the Ge is removed, and the GaAs is activated.
Another significant patent by Yee is the "Method of fabricating III-V photocathodes." This invention outlines a method for producing high-performance transmission mode negative electron affinity III-V compound photocathodes. It addresses the elimination of recurrent liquid phase epitaxial growth surface defects and resolves the 'wipe-off' problem that occurs during the termination of the growth cycle.
Career Highlights
Edward M Yee is currently employed by the US Government as represented by the Secretary of the Army. His work in this capacity has allowed him to contribute to advancements in technology that support military and defense applications.
Collaborations
Throughout his career, Yee has collaborated with notable colleagues, including William A Gutierrez and Herbert L Wilson. These partnerships have fostered an environment of innovation and have led to the development of groundbreaking technologies in the field.
Conclusion
Edward M Yee is a distinguished inventor whose work in photocathode technology has made a significant impact. His innovative methods and collaborations continue to advance the field, showcasing the importance of research and development in technology.