The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 19, 2004
Filed:
May. 19, 2003
Alan D Raisanen, Sodus, NY (US);
Shelby F Nelson, Pittsford, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A method of manufacturing a fluid ejection device having circular nozzles includes forming channels in a substrate, depositing a sacrificial material, such as photoresist, into channels to form a mold for the fluid channels and a fluid reservoir and then forming the remainder of the fluid ejection device above the sacrificial material on the substrate. Various novel fluid heater structures and an in situ fluid filter may be formed during the manufacturing process. The fluid ejection device can include a heater element located in the fluid chamber behind the nozzle opening. The geometry of the heating element can be planar. Alternatively, the heating element can be located inside the channel in either a half-cylindrical or fully-cylindrical configuration. The internal fluid pathways remain protected from contaminants by the sacrificial material. After all layers and manufacturing processes are complete, individual fluid ejection devices are diced and the sacrificial material is removed.