Patent ID: 7219429
Filing Date: 2007-05-22
Classification: B41J,Y10T

Abstract:
1. A method for forming a microelectromechanical fluid ejection device from a wafer in combination with a first layer covering a first surface of the wafer to form an interface therebetween, the method including the steps of: forming a first bore into a surface of the first layer opposing the interface to a depth beyond the interface; forming a second bore into a second surface of the wafer opposing the interface to a depth less than the interface; the first bore and the second bore meeting to form a fluid passageway; and forming a first plurality of spaced bores identical to, and simultaneous with, the first bore and forming a second plurality of correspondingly spaced bores identical to, and simultaneous with, the second bore in order to simultaneously produce a plurality of fluid passageways.