Patent ID: 8017307
Filing Date: 2011-09-13
Classification: B41J,G03F,Y10T

Abstract:
1. A method for manufacturing a liquid discharge head comprising a passage for a liquid, which communicates with a discharge port for discharging the liquid, on a substrate with a liquid discharge energy generating element for generating energy used for discharging the liquid, the method comprising: providing a first layer including a polymethyl isopropenyl ketone on the substrate; providing, on the first layer, a second layer including a photosensitive material of a copolymer obtained by copolymerization of a methacrylate and a methacrylic acid, with a weight average molecular weight of the copolymer of 50,000 to 300,000 and a ratio of the methacrylic acid included in the copolymer of 5 to 30% by weight, where the second layer on the first layer is baked at a temperature of 100 to 150° C.; forming a second part of a mold of the passage from the second layer by exposing a part of the second layer, and removing an exposed part of the second layer using a developing solution; forming a first part of the mold of the passage from the first layer by exposing a part of the first layer, and removing an exposed part of the first layer using a developing solution; providing a coating layer to coat the mold; and removing the mold to form the passage.