Patent ID: 7682779
Filing Date: 2010-03-23
Classification: B41J

Abstract:
1. A method for manufacturing a liquid discharge head provided therein with liquid discharge ports and liquid flow passageways configured to be communicated with the discharge ports, comprising, in combination, the steps of: providing, on a substrate, a lamination of a first material layer and a second material layer arranged on the first material layer, the first material layer containing therein a first positive type photosensitive resin, the second material layer containing therein a second positive type photosensitive resin photosensitive to a light in a specific wavelength range to which the first positive type photosensitive resin is photosensitive, and further at least the first material layer containing therein a light absorber that absorbs the light in the specific wavelength range to which the first positive type photosensitive resin is photosensitive; exposing the second material layer to the light in the specific wavelength range to which the first positive photosensitive resin is photosensitive, to define a pattern made of the material of the second material layer; exposing the first material layer to the light in the specific wavelength range to define a pattern made of the material of the first material layer; forming a coating layer configured to cover the patterns defined on the substrate and made of the materials of the overlaid first and second material layers; forming the discharge ports in the coating layer; and removing the patterns made of the materials of the first and second material layers, to thereby obtain the flow passageways, wherein the first material layer has a thickness thereof that is greater than that of the second material layer.