Zlatko Sitar

Title: Innovations of Zlatko Sitar

Introduction

Zlatko Sitar is a prominent inventor based in Raleigh, NC, known for his significant contributions to the field of materials science. With a total of nine patents to his name, he has made remarkable advancements in the development of aluminum nitride substrates, which are crucial for various electronic applications.

Latest Patents

One of his latest patents is focused on highly transparent aluminum nitride single crystalline layers and devices made therefrom. This invention provides highly transparent single crystalline AlN layers as device substrates for light-emitting diodes, aimed at improving the output and operational degradation of light-emitting devices. The highly transparent single crystalline AlN layers possess 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. Additionally, the invention outlines a method for growing these layers, which includes maintaining the amount of aluminum in wall deposits at a level lower than or equal to 30% of the total aluminum fed into the reactor, while keeping the wall temperature in the flow channel at less than or equal to 1200°C. Another notable patent involves the passivation of aluminum nitride substrates, providing methods to protect the surface of these substrates, allowing them to be stored for extended periods and easily activated for thin film growth or other processing.

Career Highlights

Zlatko Sitar has worked with esteemed institutions such as North Carolina State University and Hexatech, Inc. His work has significantly impacted the field of semiconductor materials, particularly in enhancing the performance of light-emitting devices.

Collaborations

Throughout his career, Sitar has collaborated with notable colleagues, including Raoul Schlesser and Rafael F. Dalmau. These collaborations have further enriched his research and innovations in the field.

Conclusion

Zlatko Sitar's contributions to the development of aluminum nitride substrates and his innovative patents have positioned him as a key figure in materials science. His work continues to influence advancements in electronic devices and light-emitting technologies.