| 主权项 |
1. A capacitive touch panel comprising:
a display device; a lower pressure sensitive adhesive layer, a capacitive touch panel sensor; an upper pressure sensitive adhesive layer; and a protective substrate, in this order, wherein temperature dependence of a relative dielectric constant of the upper pressure sensitive adhesive layer which is obtained by a temperature dependency evaluation test described below is 10.0% or less, temperature dependence of a relative dielectric constant of the lower pressure sensitive adhesive layer which is obtained by the temperature dependency evaluation test described below is equal to or greater than the temperature dependence of the relative dielectric constant of the upper pressure sensitive adhesive layer, and a difference between the temperature dependence of the relative dielectric constant of the lower pressure sensitive adhesive layer and the temperature dependence of the relative dielectric constant of the upper pressure sensitive adhesive layer is within 10.0% (temperature dependency evaluation test: an pressure sensitive adhesive layer is interposed between an aluminum electrode, a relative dielectric constant of the pressure sensitive adhesive layer is calculated by impedance measurement at 1 MHz at 20° C. and 40° C.; among the relative dielectric constant of the pressure sensitive adhesive layer at 20° C. and the relative dielectric constant of the pressure sensitive adhesive layer at 40° C., a greater one is set to be a maximum value and a smaller one is set to be a minimum value; a value (%) obtained from an equation [(maximum value−minimum value)/minimum value×100] is set to be the temperature dependence; and in a case where the relative dielectric constant of the pressure sensitive adhesive layer at 20° C. and the relative dielectric constant of the pressure sensitive adhesive layer at 40° C. have the same value, the temperature dependence is 0%). |
