| 摘要 |
PURPOSE:To suppress a blocking phenomenon in curing after coating in production and contrive a higher yield, by specifying the film thickness after drying of a thermosetting-type electric resistance layer. CONSTITUTION:An electric resistance layer, a base layer and an ink layer are provided. When the electric resistance layer is of the thermosetting type, the film thickness of the layer upon drying is up to 5.0mum. If the film thickness is more than 5.0mum, a blocking phenomenon occurs with the result of great scatter of surface resistance values, thereby causing a marked reduction in the yield. When the electric resistance layer is of a type other than the thermosetting type, for example, a thermoplastic type, no reaction takes place, so that a blocking phenomenon will not occur. |
