Sheet for pen input device and method for producing sheet for pen input device

摘要

When an instruction is input by bringing the electronic pen into contact with the sheet, it is possible to obtain the same writing feeling as when writing on paper with a writing instrument such as a ballpoint pen. A pen input device sheet for detecting a pointing position instructed by an electronic pen, which is in contact with the tip of the core of the electronic pen, and includes a resin film layer. SR is the diameter of the tip of the core of the electronic pen, and δ is the amount of sinking of the resin film that changes according to the load when a load is applied to the tip of the core of the electronic pen. When the dynamic friction coefficient between the resin film and the tip of the core is μ, when the load is applied to the tip of the core, the resin film layer is placed on the tip of the core. Measurement is performed with respect to a change in applied load, and an approximate straight line of plotted data has a proportional relationship of μ∝δ / SR.