| 摘要 |
<p>Provided is a front-surface plate for a tactile sensor with good sensor accuracy for perceiving by touch, in which any reduction in the external appearance due to an interference pattern is suppressed, light permeability is excellent, and readability is exceptional. A front-surface plate (1) for a tactile sensor comprising a high-resistance layer (3) and an electrically insulating insulation layer (4) layered on a transparent substrate (2) in the stated order from the transparent substrate (2) side, wherein the high-resistance layer (3) has a surface resistance value of 1-100 MOmega/□, a refraction index of 1.8-2.5, and a thickness of 5-50 nm; the insulation layer (4) has a refraction index of 1.3-1.6 and a thickness of 0.5-15 µm; and the transparent substrate (2) has a surface roughness Ra on the surface facing the high-resistance layer (3) of 0.05-0.5 µm. The surface roughness Ra of the surface of the front-surface plate (1) for the tactile sensor is no more than 0.05 µm.</p> |
