Cooper & Dunham LLP
Actuator element, liquid drop discharge head, liquid drop discharge apparatus and image forming apparatus
An actuator element includes an electrode film; and an insulation film layered on the electrode film including a through hole for connecting a wiring which is formed on the insulation film to the electrode film. A shape of a rim of the through hole is either a closed curve free of corners or a polygon with vertex angles which are larger than 90 degrees.
RICOH COMPANY, LTD.
H B H B B B
H01L B41J H01L B41J B41J B41J
inventional additional inventional additional inventional inventional
Kaichi Kouji Manabu Takahiko
Ueno Ohnishi Nishimura Kuroda