Rointan F Bunshah

Title: Rointan F Bunshah: Innovator in Diamond Film Technology

Introduction

Rointan F Bunshah is a notable inventor based in Playa del Rey, CA (US). He has made significant contributions to the field of materials science, particularly in the development of diamond films. With a total of 14 patents to his name, Bunshah's work has paved the way for advancements in semiconductor technology and electron emission.

Latest Patents

One of his latest patents is a plasma enhanced chemical transport process for forming diamond films. This innovative process allows for the formation of microcrystalline diamond films at relatively low deposition temperatures and rates of about 1 µm/hr. The process operates in a substantially oxygen-free hydrogen environment at pressures between 80 to 180 Torr and a current density of approximately 1 amp/cm² of substrate. The resulting doped diamond films exhibit a well-faceted microcrystalline structure, making them suitable for use as n-type and p-type semiconductors.

Another significant patent is for a diamond thin film electron emitter. This invention involves doped and undoped polycrystalline and noncrystalline diamond films that can emit electrons into a vacuum when subjected to an electrical field. The required field for emission is notably low, with doped polycrystalline films needing less than 20 V/µm, while undoped nanocrystalline films can operate at 5 to 8 volts/µm, and doped nanocrystalline films may require 3 volts/µm or less. These materials demonstrate continuous emission properties across the entire surface of the film.

Career Highlights

Bunshah has had a distinguished career, working with prestigious institutions such as the University of California and The Regents of the University of California. His research has significantly impacted the field of diamond film technology, leading to practical applications in electronics and materials science.

Collaborations

Throughout his career, Rointan F Bunshah has collaborated with notable colleagues, including Hans J Doerr and Shyankay R Jou. These collaborations have further enriched his research and contributed to the advancement of diamond film technologies.

Conclusion

Rointan F Bunshah's innovative work in the field of diamond films has established him as a leading inventor in materials science. His patents and research continue to influence the development of advanced semiconductor technologies.