Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
October 13, 2015
Patent Application Number
14376099
Date Filed
April 27, 2012
Patent Citations Received
Patent Primary Examiner
Patent abstract
In an embodiment, a fluid ejection device includes a substrate with a fluid slot, and a chamber layer over the substrate that defines a firing chamber and a fluidic channel extending through the firing chamber and in fluid communication with the slot at first and second ends. The device includes a tophat layer formed as a two-layer stack over the chamber layer, and a nozzle bore over the firing chamber that comprises a greater cavity formed in a first layer of the stack and a lesser cavity formed in a second layer of the stack, the greater cavity encompasses a larger volume than the lesser cavity.
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