Patent ID: 6019907
Filing Date: 2000-02-01
Classification: B41J

Abstract:
A method for forming an ink refill slot for an inkjet printhead having a die, a thin film structure and an orifice layer, the refill slot leading to a plurality of inkjet nozzle chambers formed in the orifice layer, the method comprising the steps of:forming a first trench in the silicon die in a (100) crystal plane to a first depth;apply a hard mask to walls of the first trench;forming first and second non-overlapping windows in the hard mask to reveal a first portion and a second portion of a first wall of the first trench;forming a second trench in the silicon die in the (100) crystal plane at the first portion of the wall of the first trench, the second trench extending to a second depth of the silicon die and having a second trench first wall; andforming a third trench in the silicon die in the (100) crystal plane at the second portion of the wall of the first trench, the third trench extending to a third depth of the silicon die and having a third trench first wall.