Keith Willis

Title: Keith Willis: Innovator in Etching Technology

Introduction

Keith Willis is a notable inventor based in Portland, OR (US). He has made significant contributions to the field of etching technology, particularly in the development of formulations that enhance the efficiency of metallization processes. With a total of 2 patents to his name, Willis has established himself as a key figure in innovation.

Latest Patents

Willis's latest patents focus on an etchant formulation designed for selectively removing thin films in the presence of copper, tin, and lead. This invention relates to a ball-limiting metallurgy (BLM) etching system and process. The BLM stack is utilized in electrical devices that contain an aluminum layer disposed upon a metal first layer. Additionally, a metal upper layer is positioned above the metal second layer, with an alternative metal third layer situated between the metal second layer and the metal upper layer. The etching system employs a solution that includes a nitrogen-containing heterocyclic compound, an ammonium hydroxide compound, an oxidizer, and a metal halide compound. The etching conditions are meticulously designed to prevent any dissolved metallization from redepositing, thereby avoiding lowered yields.

Career Highlights

Willis has built a successful career at Intel Corporation, where he has been instrumental in advancing etching technologies. His work has contributed to the efficiency and effectiveness of metallization processes in various electronic devices.

Collaborations

Throughout his career, Willis has collaborated with esteemed colleagues, including Donald D Danielson and Tzeun-luh Huang. These partnerships have fostered innovation and have led to the successful development of new technologies in the field.

Conclusion

Keith Willis is a prominent inventor whose work in etching technology has made a significant impact on the industry. His innovative patents and collaborations continue to drive advancements in metallization processes.