Patent ID: 6491382
Filing Date: 2002-12-10
Classification: B41J

Abstract:
A liquid discharge head, comprising:a heat generator that generates a thermal energy for generating a bubble in a liquid; a discharge part as a portion to discharge said liquid; a flow path communicating with the discharge part and having a bubble generation region in which the bubble is generated; a movable member having a free end and displaced with the growth of said bubble; and a restricting portion to define a displacement amount of said movable member, in which said flow path is formed by joining a substantially flat substrate provided with said heat generator and said movable member with a top plate opposing to said substrate and including said restricting portion, and said liquid is discharged from said discharge part by an energy during generation of said bubble, wherein a clearance between at least a sidewall of said flow path and the side edge portion of said restricting portion is larger than a clearance between said sidewall of said flow path and the side edge portion of said movable member.