Friedrich Scheu

Title: Friedrich Scheu: Innovator in Thermal Ink Jet Technology

Introduction

Friedrich Scheu is a notable inventor based in San Jose, California, recognized for his contributions to thermal ink jet technology. With a total of two patents to his name, Scheu has made significant advancements in the field, particularly while working at Hewlett-Packard Company.

Latest Patents

One of Scheu's latest patents is for a thermal ink jet printhead. This invention features a protective passivation structure that includes a resistive heating element made of phosphorus-diffused silicon. The passivation structure consists of a layer of silicon nitride over the heating element, topped with a layer of silicon carbide. This design ensures good adhesion and thermal conductivity, while the silicon carbide provides exceptional wear resistance against ink bubble cavitation.

Another significant patent by Scheu is for a spinner chuck designed for non-circular substrates. This innovative spinner chuck includes a recessed portion that accommodates non-circular substrates, addressing the issue of uneven build-up of photoresist coatings. The design incorporates openings in the base of the recess to effectively drain off excess coating material, enhancing the efficiency of the coating process.

Career Highlights

Throughout his career, Friedrich Scheu has been instrumental in developing technologies that improve printing processes. His work at Hewlett-Packard Company has positioned him as a key figure in the advancement of thermal ink jet printing.

Collaborations

Scheu has collaborated with various professionals in the field, including his coworker Glenn W. Weberg, to further enhance the innovations in printing technology.

Conclusion

Friedrich Scheu's contributions to thermal ink jet technology through his patents demonstrate his commitment to innovation in the printing industry. His work continues to influence advancements in this field, showcasing the importance of inventive minds in technology development.