Patent ID: 7041363

Claim:
A solid body of plastic, glass, ceramic or metal, comprising: at least partially a microstructured surface with rows oriented in a preferential direction of cross-sectionally trapezoidal or wedge-shaped ridges, wherein said ridges have minima and maxima in height in a range of from 0 mm to 2 mm; wherein the minima and maxima follow one another periodically with wavelengths in a range from 0.005 to 20 mm; wherein spacing of rows of neighboring ridges in relation to one another is 0.002 mm to 5 mm; wherein valleys between the rows are planar or tapered; and wherein the cross-sectionally trapezoidal or wedge-shaped ridges have a wedge angle in a range of from 15 to 75°; wherein periodic height fluctuations of the ridges of neighboring rows are offset in relation to one another in an alternating manner.