Patent ID: 7470375

Claim:
A method for manufacturing a liquid ejection head comprising a substrate provided with ejection-energy-generating elements operable to generate energy for ejecting liquid and provided with a liquid supply orifice adapted to supply liquid to the ejection-energy-generating elements, the method comprising: a step of preparing a silicon (Si) substrate having a first face used to form the ejection-energy-generating elements and a second face; a step of forming a mask used for forming the liquid supply orifice on the second face of the Si substrate; a step of forming oxidation-induced stacking faults in the second face of the Si substrate only at a portion in which the periphery of the portion corresponds to an opening of the mask; a step of forming the ejection-energy-generating elements on the first face of the Si substrate; and a step of forming the liquid supply orifice passing through the substrate by anisotropic etching using the mask.