Richard N Thomas

Title: Innovations of Richard N Thomas

Introduction

Richard N Thomas is a notable inventor based in Murrysville, PA (US). He has made significant contributions to the field of materials science, particularly in the production of advanced semiconductor crystals. With a total of seven patents to his name, Thomas has developed innovative methods that enhance the quality and efficiency of crystal growth processes.

Latest Patents

One of his latest patents is titled "Method of producing large diameter silicon carbide crystals." This invention describes a method for producing silicon carbide crystals in a specially designed furnace. The furnace features a crucible with a cavity that has first and second spaced-apart regions. The process involves heating the crucible cavity, preferably through induction or resistance heating, while maintaining insulation around it. A source material of silicon carbide is placed in the first region, and a monocrystalline seed is positioned in the second region. The method includes a first growth stage where both regions are heated to the sublimation temperature of silicon carbide under isothermal conditions. Following this, a second growth stage introduces a temperature gradient, ensuring that the seed remains at a lower temperature than the first region.

Another significant patent is "Indium doped gallium arsenide crystals and method of preparation." This invention outlines a method for fabricating low dislocation single crystal indium-doped gallium arsenide. The process utilizes an improved liquid encapsulant Czochralski method, incorporating an indium doping level that enhances the crystal structure. The initial melt consists of elemental indium, gallium, and arsenic, with a specific concentration of indium that allows for high yield growth of crystals exhibiting desired electrical characteristics.

Career Highlights

Throughout his career, Richard N Thomas has worked with prominent companies such as Westinghouse Electric Corporation and Northrop Grumman Systems Corporation. His experience in these organizations has contributed to his expertise in the field of semiconductor technology and crystal growth.

Collaborations

Thomas has collaborated with notable colleagues, including Michael M Sopira and Donovan L Barrett. These partnerships have likely facilitated the exchange of ideas and advancements in their respective fields.

Conclusion

Richard N Thomas is a distinguished inventor whose work in semiconductor crystal production has led to significant advancements in materials science. His innovative patents reflect his commitment to enhancing the quality and efficiency of crystal growth processes.