Patent ID: 8993892
Filing Date: 2015-03-31
Classification: H05K

Abstract:
1. A wiring board, which is to be connected to a plurality of individual-electrode connection terminals and at least one common-electrode connection terminal that are disposed on a surface of an actuator having a plurality of individual electrodes and at least one common electrode, the plurality of individual-electrode connection terminals being provided for the respective individual electrodes, and the at least one common-electrode connection terminal being provided for the at least one common electrode, said wiring board comprising: a flexible substrate which has an opposed surface that is to be opposed to the surface of the actuator, and which is made of an insulating material; a plurality of first connection electrode portions which are disposed on said opposed surface of said flexible substrate, and which are to be connected to the plurality of individual-electrode connection terminals of the actuator via first bumps each made of a conductive adhesive; a plurality of first wires each of which is made of a conductive material, said first wires having electrical continuity with said plurality of first connection electrode portions; at least one second connecting electrode portion which is disposed on said opposed surface of said flexible substrate, and which is to be connected to the at least one common-electrode connection terminal of the actuator via at least one second bump each made of a conductive adhesive; and a second wire which is made of a conductive material, said second wire having electrical continuity with said at least one second connecting electrode portion and including a large width portion having a width larger than a width of each of said first wires, wherein said at least one second connecting electrode portion is provided in said large width portion of said second wire, such that said at least one second connecting electrode portion and said large width portion are located in an edge portion of said flexible substrate, wherein said opposed surface of said flexible substrate is coated with an insulating layer, such that said plurality of first wires and said second wire are covered by said insulating layer, and such that said plurality of first connection electrode portions and said at least one second connecting electrode portion are exposed from said insulating layer, wherein said large width portion of said second wire has a conductive-material absent portion in which the conductive material constituting said second wire is absent, such that said conducive-material absent portion is located between an edge of said flexible substrate and at least one of said at least one second connecting electrode portion, and wherein said insulating layer includes a portion located in said conductive-material absent portion.