Location History:
- Palo Alto, CA (US) (1976)
- Woodside, CA (US) (1985)
Company Filing History:
Years Active: 1976-1985
Title: Frank Ura: Innovator in Thermal Ink Jet Technology
Introduction
Frank Ura is a notable inventor based in Palo Alto, CA (US), recognized for his contributions to thermal ink jet technology. He holds a total of 3 patents, showcasing his innovative approach to enhancing printhead performance.
Latest Patents
One of Ura's latest patents is for a thermal ink jet printhead with self-passivating elements. This invention involves a passivation layer formed through a reaction between the materials of the ink jet structure and an element that creates a chemically inert, electrically insulating, thermally conductive compound. The resistor structure may utilize tantalum or tantalum nitride, with aluminum serving as the electrical conductors. By exposing this structure to a reactive oxide atmosphere, anodization occurs, resulting in protective surface films that enhance durability.
Another significant patent is for a thin film thermal print head. This design features resistive heating elements deposited on glass glaze mesas over an aluminum oxide substrate, which improves the efficiency of marking thermally sensitive recording materials. The process involves etching to form the mesas, followed by the deposition of resistive and conductive materials. The raised heater elements undergo chemical delineation and heat treatment, which adjusts their resistance and grows a protective oxide layer. This innovation eliminates the need for external trimming resistors and enhances the longevity of the heater elements.
Career Highlights
Frank Ura has made substantial contributions to the field of thermal ink jet technology during his career at Hewlett-Packard Company. His work has significantly advanced the capabilities of ink jet printing, making it more efficient and reliable.
Collaborations
Ura has collaborated with notable colleagues, including Conrad L. Wright and James G. Bearrs, contributing to the development of innovative printing technologies.
Conclusion
Frank Ura's work in thermal ink jet technology has led to significant advancements in the field, with his patents reflecting a commitment to innovation and efficiency. His contributions continue to influence the printing industry today.