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:
Apr. 17, 2012
Filed:
May. 25, 2010
Byron Vencent Bell, Paris, KY (US);
Christopher Allen Craft, Paris, KY (US);
Bryan Thomas Fannin, Versailles, KY (US);
Burton Lee Joyner, Ii, Lexington, KY (US);
Sean Terrence Weaver, Union, KY (US);
Byron Vencent Bell, Paris, KY (US);
Christopher Allen Craft, Paris, KY (US);
Bryan Thomas Fannin, Versailles, KY (US);
Burton Lee Joyner, II, Lexington, KY (US);
Sean Terrence Weaver, Union, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
A method of making a micro-fluid ejection head structure and micro-fluid ejection heads made by the method. The method includes applying a tantalum oxide layer to a surface of a fluid ejection actuator disposed on a device surface of a substrate so that the tantalum oxide layer is the topmost layer of a plurality of layers including a resistive layer, and a protective layer selected from a passivation layer, a cavitation layer, and a combination of a passivation layer and a cavitation layer. The tantalum oxide layer has a thickness (t) that satisfies an equation t=(¼*W/n), wherein W is a wavelength of radiation from a radiation source, and n is a refractive index of the tantalum oxide layer. A photoimageable layer is also applied to the substrate. The photoimageable layer is imaged with the radiation source and then developed.