Raoul Schlesser

Title: The Innovative Journey of Raoul Schlesser

Introduction

Raoul Schlesser is a noted inventor based in Cary, NC, who has made significant contributions to the field of materials science and engineering. With a portfolio of 9 patents, his work focuses on the development of advanced materials, specifically in aluminum nitride, which has promising applications in optoelectronics.

Latest Patents

Among his latest inventions, Raoul Schlesser has developed highly transparent aluminum nitride single crystalline layers and devices made therefrom. This invention aims to provide highly transparent single crystalline AlN layers as device substrates for light-emitting diodes (LEDs). The objective is to enhance the output and operational stability of light-emitting devices. The transparent AlN layers boast a refractive index in the a-axis direction ranging from 2.250 to 2.400, with an absorption coefficient of less than or equal to 15 cm-1 at a wavelength of 265 nm. Furthermore, he has disclosed a method for growing these layers, which involves maintaining the aluminum content in wall deposits below 30% of the total aluminum fed into the reactor and keeping the wall temperature in the flow channel at or below 1200°C.

Additionally, he holds a patent for the preparation of polycrystalline aluminum nitride materials that feature high density, high purity, and desirable surface morphology. The methods he developed include pressing aluminum nitride powders into a slug and sintering it to create a sintered polycrystalline aluminum nitride boule. This innovative approach is notable for not employing any sintering aids or binders, resulting in materials with excellent density, purity, and surface characteristics.

Career Highlights

Raoul Schlesser has had a distinguished career, working with reputable organizations like North Carolina State University and Hexatech, Inc. His tenure at these institutions has allowed him to explore and innovate in the areas of materials science and optoelectronic devices.

Collaborations

Throughout his professional journey, Raoul collaborated with esteemed colleagues such as Zlatko Sitar and Rafael F. Dalmau. These partnerships have contributed to his innovative research efforts and the advancement of technologies in their field.

Conclusion

Raoul Schlesser’s work exemplifies the spirit of innovation and dedication to advancing materials science. His patents not only reflect his expertise but also have the potential to impact the future of light-emitting devices significantly. As he continues his journey in research and development, his contributions will undoubtedly pave the way for breakthroughs in technology.