Holger T Sommer

Title: Holger T Sommer: Innovator in Particle Detection Technology

Introduction

Holger T Sommer is a distinguished inventor based in Greenbelt, MD, known for his significant contributions to the field of particle detection technology. With a total of 10 patents to his name, Sommer has made remarkable advancements that enhance the efficiency and accuracy of semiconductor processing equipment.

Latest Patents

Sommer's latest patents include a vacuum line particle detector with slab laser. This innovative particle sensing cell is designed to detect the size of particles in a vacuum line for semiconductor processing equipment. A YAG plate is strategically placed adjacent to the vacuum line conduit to define an external laser cavity. This cavity extends across the conduit between an end face of the YAG plate and a mirror spaced from the end face. The YAG plate generates a laser beam in the shape of a sheet that spans the conduit. A cylindrical lens is positioned next to the mirror to focus light scattered from particles passing through the laser beam onto rectilinear photodetector arrays. The pulses generated by the array are then applied to pulse amplitude measuring circuitry.

Another notable patent is for particle contamination detection in fluids through an external section. In this particle detecting instrument, a particle detecting cell comprises a laser plasma tube combined with a glass prism that defines a fluid channel. The glass prism abuts the transmitting end of the laser plasma tube, and its end wall is arranged at the Brewster angle concerning the plasma tube axis. The fluid channel within the prism is also arranged at the Brewster angle with respect to the laser beam passing through it. A mirror is positioned on the prism to reflect light back into the plasma tube, ensuring that the reflected light is in phase with the light amplified within the tube. A mount is provided for the mirror to adjust its lateral and angular position.

Career Highlights

Holger T Sommer has built a successful career at Pacific Scientific Company, where he has been instrumental in developing cutting-edge technologies in particle detection. His work has significantly impacted the semiconductor industry, providing solutions that improve the reliability and performance of various applications.

Collaborations

Sommer has collaborated with notable professionals in his field, including Charles F Harrison, enhancing the innovation process through shared expertise and knowledge.

Conclusion

Holger T Sommer's contributions to particle detection technology exemplify his dedication to innovation and excellence. His patents reflect a deep understanding of the challenges in