Company Filing History:
Years Active: 1992-1996
Title: The Innovations of Robert S. Freund
Introduction
Robert S. Freund is a notable inventor based in Livingston, NJ (US). He has made significant contributions to the field of semiconductor technology, holding a total of 5 patents. His work primarily focuses on advancements in laser technology, particularly in vertical cavity surface emitting lasers.
Latest Patents
One of Freund's latest patents is for a vertical cavity semiconductor laser. This invention involves a vertical cavity surface emitting laser (VCSEL) that features a Group III-V semiconductor epitaxial mesa structure. It includes an electrically insulating sidewall located on the mesa's sidewalls, which helps confine the optical radiation generated in the laser. The structure also has a self-aligned ohmic contact layer on the top surface of the epitaxial mesa structure.
Another significant patent by Freund is for a semiconductor surface emitting laser with enhanced optical confinement. This invention allows for the creation of a surface emitting laser that has improved heat sinking characteristics. By etching away portions of the growth layers peripheral to the intended laser cavity and regrowing regions of material with a lower index of refraction, the laser achieves enhanced optical isolation and heat sinking capabilities.
Career Highlights
Freund has had a distinguished career, working with prominent companies such as AT&T Bell Laboratories and Lucent Technologies Inc. His experience in these organizations has contributed to his expertise in semiconductor technology and laser innovations.
Collaborations
Throughout his career, Freund has collaborated with notable colleagues, including Kent D. Choquette and Minghwei Hong. These collaborations have further enriched his work and contributed to advancements in the field.
Conclusion
Robert S. Freund's contributions to semiconductor technology and laser innovations have made a significant impact in the industry. His patents reflect his dedication to enhancing optical confinement and improving the performance of semiconductor lasers.