Liquid transporting apparatus and method for producing...

Details Liquid transporting apparatus and method for producing... Liquid transporting apparatus and method for producing...

2005-10-27

2008-10-14

Do, An H (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

07434918

ABSTRACT:
An ink-jet head501as a liquid transportation apparatus includes pressure chambers514, and a piezoelectric layer503having individual electrodes532and a vibration plate530. When W is a length in the radial direction of pressure chambers514, and A is a length in the radial direction of portions of individual electrodes532to which a drive voltage is applied, the portions being formed at areas each overlapping with one side portion, in the radial direction, of the edge portion of one of the pressure chambers514, the length A in the radial direction of individual electrodes532is determined based on a relationship between the value of A/(W/2) and an amount of deformation of the vibration plate530when the drive voltage is applied to the individual electrode532, such that the amount of the deformation of the vibration plate530becomes great. Accordingly, a liquid transporting apparatus provided with the piezoelectric actuator which has excellent durability and more improved drive efficiency.

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