Method of forming a structured surface using ablatable radiation sensitive material

A method of forming a structured surface on a substrate comprising the steps of:

• (a) applying an ablatable radiation sensitive coating to a major surface of a substrate;
• and
• (b) patternwise exposing the ablatable radiation sensitive coating to radiation such that exposed portions of the ablatable radiation sensitive coating ablate to form structures framed by at least one separation bank on the substrate wherein the at least one separation bank is able to contain a flowable material in the structures, further comprising the step of depositing a flowable material onto the structures and onto the at least one separation bank to form a first intermediate assembly comprising a pattern of flowable material contained in the structured surface, further comprising the step of removing the separation banks to form a finished article.