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.
申请公布号
WO2013162606(A1)
申请公布日期
2013.10.31
申请号
WO2012US35556
申请日期
2012.04.27
申请人
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.;TAFF, BRIAN M.;HAGER, MICHAEL;OAK, JASON