Company Filing History:
Years Active: 1998-2000
Title: Innovations of Sean D O'Brien
Introduction
Sean D O'Brien is a notable inventor based in Victor, NY (US). He has made significant contributions to the field of thermal ink-jet technology, holding 2 patents that showcase his innovative approach to printhead design. His work primarily focuses on enhancing the efficiency and performance of ink-jet printheads.
Latest Patents
One of Sean's latest patents is titled "Thermal ink jet printhead with increased heater resistor control." This invention discloses an improved method for forming heater elements for an ink jet printhead. The resistance is more closely controlled by doping a central heater region, which is formed relatively thinner than the heavily doped heater regions used as the gate and contact areas. The thinner central region can be doped relatively heavy to more accurately adjust the heater resistance. In another embodiment, the thin layer is made of amorphous silicon rather than polysilicon to increase the latitude of the energy input.
Another significant patent is "Thermal ink-jet printhead with a thermally isolated heating element." This invention includes an ejector for a thermal ink-jet printhead, featuring a heating element defined on a main surface of a silicon heater chip. A cavity is disposed within the heater chip opposite the side of the heating element exposed to liquid ink. In one embodiment, the heating element is placed on a narrow pillar surrounded by two elongated trenches. In another embodiment, the heating element is suspended over a cavity by narrow supports. In each case, the cavity reduces the thermal mass of the structure supporting the heating element and acts as an insulator to prevent excess heat from being dissipated into the body of the heater chip.
Career Highlights
Sean D O'Brien is currently employed at Xerox Corporation, where he continues to innovate in the field of printing technology. His work has significantly impacted the efficiency and effectiveness of thermal ink-jet printheads, making him a valuable asset to his company.
Collaborations
Some of Sean's coworkers include Cathie J Burke and R Enrique Viturro, who have likely contributed to his innovative projects and patents.
Conclusion
Sean D O'Brien's contributions to thermal ink-jet technology through his patents demonstrate his commitment to innovation and excellence in the field. His work continues to influence the development of more efficient printing solutions.