Patent ID: 7757591

Claim:
A cutting tool assembly used for creating a micro-replication work piece that creates micro-replication structures, the cutting tool assembly comprising: a mounting structure; a first tool shank mounted in the mounting structure, the first tool shank defining a first diamond tip defining a width less than 1 mm; and a second tool shank mounted in the mounting structure, the second tool shank defining a second diamond tip defining a width less than 1 mm, wherein the first and second tool shanks are positioned in the mounting structure such that the first and second diamond tips are aligned in a cutting direction of the cutting tool assembly to within a tolerance of less than 10 microns such that when the cutting tool assembly cuts into the micro-replication work piece during a single cutting pass along the cutting direction, the first diamond tip creates a groove in the micro-replication work piece of depth D 1 and the second diamond tip does at least one of the following: creates a deeper groove of depth D 2 over the groove of depth D 1 , and creates a sub-feature of depth D 2 into the groove of depth D 1 , wherein the groove created by the first diamond tip and the deeper groove or sub-feature created by the second diamond tip collectively define a micro-replicated feature in the micro-replication work piece, and wherein the micro-replicated feature in the micro-replication work piece defines a height and a width less than 1000 microns.