Substrate with anti-fogging properties

A patterned substrate (5) comprising a surface with anti-fogging properties, the surface comprising a patterned region (28) and an unpatterned region (29)

• wherein the patterned region (28)
• a) is formed by a first periodic dot structure in the micro- or sub-micrometer range with a first interference period (p1) in the range of 50 nm to 50 μm;
• or
• b) by a first periodic dot structure in the micro- and/or sub-micrometer range with a first interference period (p1) in the range from 50 nm to 2.0 μm or in the range from 9.5 μm to 50 μm,
• wherein the first periodic dot structure is formed of inverse cones (14) or cones, the inverse cones are formed into the substrate to be patterned, the inverse cones having a rounded cone tip at their saddle point,
• wherein the surface of the substrate having the first dot structure has a water contact angle (23) of less than 20°, preferably less than 10°, preferably less than 5° when wetted with water.