Invention Grant
- Patent Title: Actuator element, liquid drop discharge head, liquid drop discharge apparatus and image forming apparatus
- Patent Title (中): 驱动元件，液滴排出头，液滴排出装置和成像装置
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Application No.: US14208004Application Date: 2014-03-13
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Publication No.: US09033468B2Publication Date: 2015-05-19
- Inventor: Kouji Ohnishi , Takahiko Kuroda , Manabu Nishimura , Kaichi Ueno
- Applicant: Kouji Ohnishi , Takahiko Kuroda , Manabu Nishimura , Kaichi Ueno
- Applicant Address: JP Tokyo
- Assignee: RICOH COMPANY, LTD.
- Current Assignee: RICOH COMPANY, LTD.
- Current Assignee Address: JP Tokyo
- Agency: Cooper & Dunham LLP
- Priority: JP2013-054177 20130315; JP2013-239005 20131119
- Main IPC: B41J2/14
- IPC: B41J2/14 ; B41J2/045 ; H01L41/047
Abstract:
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.
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