Capacitive sensor sheet producing method and capacitive sensor sheet

A capacitive sensor sheet having a conductive pattern layer formed on an insulative base layer and detecting a change in capacitance when a conductor approaches a detection electrode in the conductive pattern layer,

• wherein
• the conductive pattern layer includes:
• a plurality of detection electrodes arrayed on the insulative base layer;
• and
• wiring lines formed on the insulative base layer and connected to the plurality of detection electrodes, and
• the plurality of detection electrodes is formed by forming a binder resin layer including conductive nanowires on the insulative base layer and shaping the binder resin layer so that the conductive nanowires are partially projected from a surface of the binder resin layer,
• conductive nanowires partially projected from at least surface ends of the detection electrodes in the conductive pattern layer to which the wiring lines are connected, have an adhering area of the binder resin and an exposing area of the conductive nanowires,
• a binder resin is removed from projections of the conductive nanowires partially projected from the surface ends by implementing a surface etching and shaping treatment on the surface ends, and
• the projections of the conductive nanowires having more exposing area than that before the surface etching and shaping treatment are connected to the wiring lines.