Patent ID: 7837886

Claim:
A method of making a printhead, the method comprising: forming a resistor strip in a heating region of the printhead, including forming a resistive layer including a central resistor region interposed between two spaced apart conductive elements, wherein the resistive layer and a first conductive layer overlie a substrate in a side area of the heating region, the side area extending laterally outward from opposite side edges of the respective conductive elements and of the central resistor region of the resistive layer; forming a bus region adjacent the heating region, the bus region including at least a second conductive layer; removing at least the second conductive layer from a bus region of the printhead while protecting a first portion of the heating region, including preserving the resistive layer and the first conductive layer in at least a shoulder portion of the side area of the heating region immediately adjacent the opposite side edges of the central resistor region; and removing the resistive layer and the first conductive layer from at least the shoulder portion of the side area of the heating region to define a sidewall of the central resistor region.