Liquid ejecting head and recording device using same

The A fluid ejecting head, comprising:

• a plate member comprising:
• a fluid channel therein;
• and
• an ejection hole at a surface thereof, connected to the fluid channel;
• a piezoelectric plate on the plate member;
• a chamber between the plate member and the piezoelectric plate, having a first diamond shape in a plan view with rounded corners comprising two obtuse angle corners and two acute angle corners;
• a main portion on the piezoelectric plate and directly above the chamber, having a second diamond shape in a plan view similar to and smaller than the first diamond shape, wherein the first and second diamond shapes are overlapped and centered in the plan view;
• and
• an extraction electrode comprising:
• a first end connected to the main portion at one of the acute corners;
• a second end opposite to the first end, the second end disposed outside the chamber and not overlapping a line extending diagonal of the two acute angle corners;
• a first portion overlapping an imaginary line extending diagonal of the two acute angle corners, including the first end;
• and
• a straight portion connected to the first portion, extending a linear fashion in a direction which forms an angle of 45 degree or less with an imaginary line extending an diagonal of the two obtuse angle corners, and including the second end.