William A Eckes

Title: Innovations by William A. Eckes

Introduction

William A. Eckes is a notable inventor based in Berkeley, CA, who has made significant contributions to the field of particle beam lithography. With a total of 2 patents, his work focuses on enhancing measurement systems and wafer handling in advanced lithographic processes.

Latest Patents

Eckes' latest patents include a specimen distance measuring system and an electrostatic cassette. The specimen distance measuring system utilizes a plate to obstruct backscattered electrons produced by an electron beam, casting a shadow across a measurement detector. This innovative design allows for precise calibration of the distance measuring system, making it particularly useful as a height sensor in electron beam lithography apparatuses. The system also incorporates a reference detector to compensate for variations in electron beam current and substrate backscatter coefficient.

The electrostatic cassette assembly developed by Eckes features a cassette body designed to hold a wafer during processing in a particle beam lithographic system. It includes a charge plate that applies a potential difference to flatten the wafer using Coulombic force, ensuring both mechanical and electrostatic stability. This design enhances the efficiency and accuracy of wafer handling in lithographic applications.

Career Highlights

William A. Eckes has had a distinguished career at The Perkin-Elmer Corporation, where he has contributed to various innovative projects. His expertise in electron beam lithography and measurement systems has positioned him as a key figure in advancing technology in this field.

Collaborations

Eckes has collaborated with notable colleagues such as Russell H. Rhoades and John W. Vorreiter, further enhancing the impact of his work through teamwork and shared expertise.

Conclusion

William A. Eckes continues to be a driving force in the field of particle beam lithography, with his innovative patents paving the way for advancements in measurement systems and wafer handling. His contributions are vital to the ongoing evolution of lithographic technology.