Patent ID: 7293857

Claim:
An inkjet printhead comprising: a substrate; a plurality of heaters formed on an upper portion of the substrate for heating ink for generating bubbles; a plurality of metal-oxide semiconductor (MOS) field effect transistors (FETs) formed on the substrate for addressing the heaters and applying electric current to the heaters; a first interconnecting layer, a second interconnecting layer, and a third interconnecting layer that are sequentially formed on the MOS FETs and electrically connected to each other for applying signals to the MOS FETs; a chamber layer for defining an ink chamber, which is filled with ink that will be ejected, on an upper portion of the heaters; and a nozzle layer having a nozzle, through which the ink is ejected, on an upper portion of the chamber layer; wherein the heaters are formed on a lower surface of the third interconnecting layer comprising a top interconnecting layer.