Patent ID: 7836598

Claim:
A method for manufacturing a liquid jet head discharging droplets from a desired nozzle by exciting a corresponding heating element disposed above a semiconductor substrate with a wiring pattern therebetween to generate heat so as to heat a liquid in a corresponding liquid chamber, the method comprising the steps of: forming a wiring material layer of a wiring material for the wiring pattern between the heating element and the semiconductor substrate; forming the heating element of metal or a metallic compound above the semiconductor substrate; forming a protective layer to protect the heating element from dry etching, the protective layer formed only on heating element; forming another wiring material layer of a wiring material for another wiring pattern so that at least a portion of the another wiring material layer is on the liquid chamber side of the protective layer; dry-etching the another wiring material layer to form the another wiring pattern; forming a liquid protection layer to protect the heating element from the liquid on the surface on the liquid chamber side of the protective layer; and forming a tantalum layer to provide an anti-cavitation layer on the liquid chamber side of the liquid protection layer, wherin the steps are performed in that order.