Louis H Hemmerdinger

Title: Innovations of Louis H Hemmerdinger

Introduction

Louis H Hemmerdinger is a notable inventor based in Old Bethpage, NY (US). He has made significant contributions to the field of semiconductor crystal growth, holding a total of 2 patents. His work has implications for both terrestrial and micro-gravity environments.

Latest Patents

Hemmerdinger's latest patents include an "Apparatus for directional solidification of a crystal material." This invention features a furnace designed for growing semiconductor crystals, which includes an elongated tubular chamber encased within a cylindrical jacket. The furnace is divided into multiple zones, each equipped with insulation blocks to prevent heat loss and absorb external vibrations. The heating elements are controlled by processing means to generate the desired temperature in each zone. Additionally, an annular shunt disc can be used to draw heat from specific areas, making this furnace suitable for operation on Earth and in micro-gravity environments.

Another significant patent is the "Method and apparatus for growth of single crystal material in space." This invention involves an ampoule assembly specifically designed for micro-gravity conditions. It includes centering rods that space crystalline material from the inner surface of the ampoule, allowing for a dopant vapor passageway. This design ensures uniform stoichiometry during the melting and resolidification processes, leading to greater purity in the resulting single crystal.

Career Highlights

Hemmerdinger has worked at Grumman Aerospace Corporation, where he has applied his expertise in crystal growth technologies. His innovative approaches have contributed to advancements in materials science and aerospace applications.

Collaborations

Some of his notable coworkers include Herbert J Schneider and Gregory W Knowles, who have collaborated with him on various projects within the aerospace sector.

Conclusion

Louis H Hemmerdinger's contributions to the field of semiconductor crystal growth are noteworthy. His patents reflect a deep understanding of both terrestrial and micro-gravity environments, showcasing his innovative spirit and dedication to advancing technology.