Patent ID: 7168787

Claim:
A monolithic bubble-ink jet print head comprising: a substrate having a plurality of resistance heat emitting bodies to heat ink and an ink supply opening to supply the ink from an ink cartridge; a chamber plate formed on the substrate to form a flow channel structure including a plurality of restrictors connected with the ink supply opening and a plurality of ink chambers connected with the restrictors; and a nozzle plate formed on the chamber plate to have a plurality of nozzles formed therethrough, wherein the nozzle plate has an anti-curing-deformation part formed at at least one of an inner surface thereof forming the ink chambers and an outer surface thereof forming a front or outer surface of the printer head to prevent an abnormal deformation from being generated therein during a curing process, wherein the anti-curing-deformation part comprises at least one groove disposed in a longitudinal direction between rows of the nozzles of the nozzle plate.