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:
Mar. 12, 2013
Filed:
Sep. 30, 2010
Xiaoming Wu, Lexington, KY (US);
David Graham, Lexington, KY (US);
Sean Weaver, Union, KY (US);
Bart Mansdorf, Lexington, KY (US);
Rich Wells, Westerville, OH (US);
Joel Provence, Delaware, OH (US);
Xiaoming Wu, Lexington, KY (US);
David Graham, Lexington, KY (US);
Sean Weaver, Union, KY (US);
Bart Mansdorf, Lexington, KY (US);
Rich Wells, Westerville, OH (US);
Joel Provence, Delaware, OH (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
Environmentally friendly thick film layers for a micro-fluid ejection head and micro-fluid ejection heads are disclosed. The environmentally friendly thick film layer includes a negative photoresist layer derived from a composition comprising a multi-functional epoxy compound, a low molecular weight polymeric difunctional epoxy compound, a monomeric difunctional epoxy compound, a methide-based photoacid generator that does not contain antimony, a chromophore and an aryl ketone solvent. Optionally the photoresist layer contains an adhesion enhancer. The negative photoresist layer is environmentally friendly and provides good resolution, well defined critical dimensions, straight side walls, and a large processing window.