Back to results
US 6,325,488 B1Granted
Inkjet printhead for wide area printing
AssigneeHewlett-Packard Company
InventorsTimothy E. Beerling, James W. Pearson, Antonio Cruz-Uribe, Melissa D. Boyd
Life of this patent
Estimating the term…
Abstract
A printhead is formed from a plurality of ink ejectors mounted on an inner surface of a rigid substrate while protruding through holes provided in the substrate. Electrical contact is provided on a surface of the ink ejectors common with the ink ejecting nozzles thereby avoiding vias to another surface. The rigid substrate provides a conducting layer on its inner surface such that the ink ejectors may be connected thereto with solder reflow techniques.
Claims12
A printhead for an inkjet printer, comprising:
- an essentially rigid substrate having a first surface and a second surface, including at least one opening extending from said first surface to said second surface and first and second laminations, said first lamination being thinner than said second lamination and having a first side of said first lamination forming said first surface of said essentially rigid substrate and having said second lamination is affixed to a second side of said first lamination;
- a conducting layer disposed at least partially on said second side;
- an ink ejection assembly having a first surface and a second surface, comprising an ejector, whereby momentum is imparted to ink within said ink ejection assembly, a nozzle plate forming a first portion of said first surface of said ink ejection assembly having a nozzle through which ink is ejected, a conducting layer forming a second portion of said first surface of said ink ejection assembly, whereby said ejector is energized, and an ink feed channel opening to said second surface of said ink ejection assembly;
- said ink ejection assembly disposed in said at least one opening and in contact with said essentially rigid substrate such that said nozzle plate and said first surface of said essentially rigid substrate are in a predetermined relationship relative to one another and said conducting layer of said ink ejection assembly is connected to said conducting layer of said essentially rigid substrate;
- and
- wherein said at least one opening includes a first magnitude of area in said first lamination and a second magnitude of area in said second lamination, said second area magnitude being larger than said first area magnitude, whereby said opening is smaller at said first surface of said essentially rigid substrate than at said second surface of said essentially rigid substrate.
3 more elements
A printhead for an inkjet printer, comprising:
- a laminated substrate with first and second surfaces and comprising first and second laminations, said first lamination being thinner than said second lamination and having a first side of said first lamination forming said first surface of said laminated substrate and a second side of said first lamination to which said second lamination is affixed, said laminated substrate further comprising at least one opening extending from said first surface to said second surface, said at least one opening having a first magnitude of area in said first lamination and a second magnitude of area in said second lamination, said second area magnitude being larger than said first area magnitude, whereby said opening is smaller at said first surface of said laminated substrate than at said second surface of said laminated substrate;
- a first conducting layer disposed at least partially on said second side;
- and
- an ink ejection assembly comprising a surface, away from which surface ink drops are ejected and upon at least a portion of which a second conducting layer is disposed, said ink ejecting assembly disposed in said at least one opening and in contact with said laminated substrate such that said second conducting layer is in electrical connection with said first conducting layer.
1 more element
Dependencies are inferred from the claim text.