| 摘要 |
<p>A method of polarising a portion of a monolithic piezoelectric actuator element for use in droplet deposition apparatus where the element has first (46) and second portions (48) includes the steps of placing the first portion (46) of the element at en equipotential and generating a polarising electric field across the second portion (48) between said first portion (46) and a further conducting layer.</p> |
