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:
Feb. 19, 2013
Filed:
Apr. 21, 2010
Yimin Guan, Lexington, KY (US);
Burton Joyner, Ii, Lexington, KY (US);
Yimin Guan, Lexington, KY (US);
Burton Joyner, II, Lexington, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
A micro-fluid ejection head has a resistor layer defining a heater element. An insulative layer underlies the heater element and a capping layer on the insulative layer substantially prevents ion mobility between the resistor and insulative layers. Resistance stability of the heater has been shown improved as has adhesion of the heater to the insulator. Representative layers include insulation of methyl silesquioxane (MSQ) in a thickness of about 5000 Angstroms or more, while the cap is a silicon nitride in a thickness of about 2000 Angstroms or less. Other capping layers include silicon carbide, silicon oxide or dielectrics. The resistor layer typifies TaAlN in a thickness of about 350 Angstroms, including overlying anode and cathode conductors that define the heater. Coating layers are also disclosed as are thermal barrier layers.