Patent ID: 8585187

Claim:
A method for forming an ink jet print head, comprising: attaching a piezoelectric element array comprising a plurality of piezoelectric elements to a diaphragm; electrically coupling a plurality of electrically conductive flexible printed circuit electrodes of a flexible printed circuit to the plurality of electrically conductive piezoelectric elements to form at least one space between the diaphragm and the flexible printed circuit, wherein the flexible printed circuit comprises a plurality of openings therethrough; applying a vacuum to the plurality of openings through the flexible printed circuit; dispensing a liquid underfill into the at least one space between the diaphragm and the flexible printed circuit at an edge of the piezoelectric element array using the vacuum placed on the plurality of openings through the flexible printed circuit to draw the liquid underfill into the at least one space between the diaphragm and the flexible printed circuit; and curing the liquid underfill to encapsulate the plurality of piezoelectric elements within the underfill.