Patent ID: 8491106

Claim:
A method for manufacturing a liquid supply member for supplying liquid to a liquid ejection port, wherein the liquid supply member includes a transmissive member being transmissive to laser light and an absorptive member being absorbent to laser light, and at least one of the transmissive member and the absorptive member has a groove to be formed into a supply passage through which liquid is supplied to the ejection port, the method comprising: bringing the transmissive member and the absorptive member into contact with each other, with the groove inside; forming the supply passage by radiating laser light, via the transmissive member, from a plurality of first laser light sources disposed along a longitudinal direction of the groove toward a first contact portion at a periphery of the groove, at which the transmissive member and the absorptive member are in contact, to weld the transmissive member and the absorptive member together at the first contact portion; and at the forming the supply passage, radiating laser light, via the transmissive member, from a second laser light source provided in a vicinity of a laser light source, among the plurality of the first laser light sources, toward a vicinity portion of the absorptive member, outside the first contact portion, in a vicinity of an end of the groove in the longitudinal direction, in parallel with the radiation of laser light from the plurality of the first laser light sources.