Patent ID: 11872813
Assignee: SEIKO EPSON CORPORATION
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B  H | IPC B  H

Claim 2:
3. A liquid discharge head comprising:
piezoelectric elements;
a vibrating plate disposed at a position below the piezoelectric elements in a first direction; and
a pressure chamber plate disposed at a position below the vibrating plate in the first direction, the pressure chamber plate having a partition wall defining pressure chambers, wherein
in the respective pressure chambers, when one of two positions in a second direction intersecting the first direction is defined as a first position and the other position is defined as a second position from which the shortest distance to the partition wall is shorter than the shortest distance from the first position to the partition wall,
the vibrating plate has a first portion corresponding to the first position and a second portion corresponding to the second position,
a surface of the first portion in the first direction is, in the first direction, below a surface of the second portion in the first direction,
the vibrating plate includes an elastic layer and an insulating layer having a composition different from that of the elastic layer, the insulating layer being disposed above the elastic layer in the direction opposite to the first direction,
a surface of the elastic layer of the first portion in the first direction is, in the first direction, closer than a surface of the elastic layer of the second portion in the first direction, and
a surface of the insulating layer of the first portion in the first direction and a surface of the insulating layer of the second portion in the first direction are located at the same position in the first direction.