Patent ID: 7757395

Claim:
A method of producing a substrate having feedthrough electrodes for an inkjet head, comprising: a step of forming a plurality of parallel, straight grooves in a base, the base comprising a top side, a bottom side, a front side, a back side, a left side and a right side, the plurality of parallel, straight grooves formed in the top side and having a longitudinal direction perpendicular to the front side of the base; a step of setting a conductive member fully located inside each of the grooves; a step of filling each of the grooves to prevent communication through each of the grooves; a step of adhering a cover onto the top side of the base to cover the filled grooves and form a covered structure; a step of cutting the covered structure in parallel cutting planes which are perpendicular to the longitudinal direction of the grooves, the cutting planes spaced a predetermined width apart to form a plurality of substrates the substrate having feedthrough electrodes.