Patent ID: 8152282
Filing Date: 2012-04-10
Classification: B41J

Abstract:
1. A droplet discharge device, comprising: a substrate including in which a cavity separated from a first main surface by a vibration plate, a first liquid flow path extending from said cavity to an outside, and a second liquid flow path extending from the outside to said cavity are formed; and a vibrator fixed to said vibration plate and subjecting said vibration plate to bending vibration, wherein: a width being a dimension of said cavity in a specific direction parallel to said first main surface becomes narrower from said first main surface side toward a second main surface side; said vibrator includes: a second electrode film extending in parallel to said first main surface and opposed to said first electrode film with said piezoelectric/electrostrictive film being sandwiched therebetween; a width being a dimension of a adhered region in said specific direction to which said first electrode film is adhered is 80% or more and 90% or less of a width being a dimension of said vibration plate in said specific direction; and said vibration plate includes, on both sides of said adhered region, unadhered regions which have equal width being a dimension in said specific direction and to which said first electrode film is not adhered.