Company Filing History:
2 out of 143 
1 out of 7 
1 out of 28 Years Active: 1987-1989
Title: Innovations in Photodiode Technology: The Contributions of Michel Royer
Introduction
Michel Royer, an esteemed inventor based in Paris, France, has made significant contributions to the field of photodiode technology. With a total of four patents to his name, Royer's latest inventions showcase his innovative approach and deep understanding of semiconductor materials.
Latest Patents
Among his notable patents is the development of an HgCdTe avalanche photodiode. This groundbreaking device is designed for use at ambient temperature and features an Hg.sub.1-x Cd.sub.x Te crystal substrate, with the variable x ranging between approximately 0.35 and 0.5. The invention incorporates a PN junction formed through impurity penetration from a polished and chemically etched surface, further enhanced by illumination in the P zone and a guard band surrounding the junction. Remarkably, the dark current of Royer's photodiode remains below 0.1 .ANG./cm² at ambient temperature, while the excess noise factor is minimized to less than 0.4. This technology is particularly effective in detecting signals transmitted along fluorinated glass optical fibers.
Additionally, Royer has patented a method for preparing a crystalline ingot of Hg.sub.1-x Cd.sub.x Te. This method involves creating an adaptation zone from a monocrystalline germ through precise heating and cooling, which ultimately leads to the formation of a monocrystalline ingot. This innovative approach significantly reduces the manufacturing costs associated with infrared detectors and avalanche diodes.
Career Highlights
Throughout his career, Michel Royer has collaborated with prestigious companies, including Société Anonyme De Télécommunications and Sat Corporation. His experience in these organizations has profoundly influenced his work and has facilitated the development of his patented technologies.
Collaborations
Royer's journey in innovation has been enriched through collaborations with esteemed colleagues, including Alain R. Durand and Jean G. Besson. Working alongside talented individuals in the field has contributed to the refinement and application of his inventive ideas, particularly in photonics and semiconductor technology.
Conclusion
In summary, Michel Royer's contributions to the field of photodiode technology are significant and transformative. His latest patents exemplify his innovative spirit and commitment to advancing semiconductor applications. As he continues to explore new possibilities, Royer's work remains a critical component in the evolution of optical technologies, paving the way for future advancements in the industry.