Patent ID: 8877431

Claim:
A process for producing a liquid ejection head by providing, in one chip, a liquid ejection head having a portion for ejection in which an ejection orifice array is arranged and a side portion having no ejection orifice array, these portions being provided with a member formed from a photosensitive material, arranging the chip on a common substrate as a chip array in which the chip is arranged in such a manner that the portion for ejection and the side portion are alternately arranged, and separating each chip from the common substrate to obtain the liquid ejection head, the process comprising: an exposure step of relatively moving a reticle of an aligner along the chip array with respect to a photosensitive material provided on the common substrate to expose each chip, and a development step of developing the photosensitive material subjected to the exposure treatment to obtain the member formed from the photosensitive material, wherein a first reticle for forming at least the portion for ejection and a second reticle for forming only the side portion are used as the reticle, and wherein the exposure step comprises a first exposure treatment by the first reticle for at least the portion for ejection and a second exposure treatment by the second reticle for the side portion.