Disclosed are compounds, compositions and methods for treating viral infections caused by a flaviviridae family virus, such as hepatitis C virus. A conductive film 5 made of the same material as that of a capacitor lower electrode 6 is formed so as to be adhered to a top face of a conductive film 4 by a heat treatment. The lever can be rotated in a first direction to a testing position and pulls the moving plate 28 sufficiently into the receptacle for all the tabs to project beyond the moving plate and toward the opening side of the receptacle for testing.