Patent ID: 8470258

Claim:
A surface-structured device for life-sciences comprising: a substrate having a frontside surface and a backside surface opposite the frontside surface; a plurality of groups of first protrusions arranged on the frontside surface; and a plurality of second protrusions arranged on the backside surface of the substrate; wherein a shortest dimension of each of the first protrusions in the plurality of groups at a junction of the first protrusion and the frontside surface is smaller than 250 nm; each of the groups of first protrusions is formed in corresponding different areas of the frontside surface; and each group of the first protrusions is arranged on respective planar areas of the frontside surface in respective different regular patterns in respective planes of the corresponding different areas; at least a first group of the plurality of second protrusions arranged on the backside surface is arranged on a planar area of the backside surface in a regular pattern in a plane of the planar area of the backside surface; and a shortest dimension of each of the second protrusions at a junction of the second protrusion and the backside surface is smaller than 250 nm.