Microreplicated article

Abstract

A microreplicated article is disclosed. The article includes a web including first and second opposed surfaces. The first surface includes a first microreplicated structure having a plurality of first features. The second surface includes a second microreplicated structure having a plurality of second features. Corresponding opposed features cooperate to form a lens features.

1 . An article, comprising:
 a flexible substrate having first and second opposed surfaces;   a first cured liquid pattern disposed on the first surface; and   a second cured liquid pattern disposed on the second surface, wherein the first and second cured liquid patterns are registered to within 100 microns.   
   
   
       2 . The article of  claim 1 , wherein at least one of the first and second cured liquid patterns is a radiation cured liquid pattern. 
   
   
       3 . An article, comprising:
 a flexible substrate having first and second opposed surfaces;   a first pattern disposed on the first surface and forming a first land area between the first pattern and the first surface; and   a second pattern disposed on the second surface and forming a second land area between the second pattern and the second surface, wherein the first and second patterns are registered to within 100 microns.   
   
   
       4 . The article of  claim 3 , wherein the substrate is multi-layered. 
   
   
       5 . The article of  claim 3 , wherein the first pattern is microreplicated from a first structured tool and the second pattern is microreplicated from a second structured tool. 
   
   
       6 . The article of  claim 3 , wherein the first pattern comprises a plurality of cylindrical lenses. 
   
   
       7 . The article of  claim 3 , wherein the second pattern comprises a plurality of prismatic features. 
   
   
       8 . The article of  claim 3 , wherein the first pattern has a first pitch and the second pattern has a second pitch. 
   
   
       9 . The article of  claim 8 , wherein the first pitch is the same as the second pitch. 
   
   
       10 . An article comprising:
 a flexible substrate having first and second opposed surfaces;   a first pattern disposed on the first surface and comprising a plurality of cylindrical lenses; and   a second pattern disposed on the second surface and forming a first land area between the second pattern and the second surface, wherein the first and second patterns are registered to within 100 microns.   
   
   
       11 . The article of  claim 10  further comprising a second land area between the first pattern and the first surface. 
   
   
       12 . An article comprising:
 a flexible substrate having first and second opposed surfaces;   a first pattern disposed on the first surface and comprising a plurality of cylindrical lenses; and   a second pattern disposed on the second surface and comprising a plurality of prismatic features, wherein the first and second patterns are registered to within 100 microns.   
   
   
       13 . The article of  claim 12  further comprising a first land area between the second pattern and the second surface. 
   
   
       14 . A system, comprising:
 a first patterned tool comprising a first pattern;   a second patterned tool comprising a second pattern;   a flexible substrate disposed between the first and second patterned tools;   a third pattern disposed on the first surface, the third pattern being a replica of the first pattern; and   a fourth pattern disposed on the second surface, the fourth pattern being a replica of the second pattern, wherein the third and fourth patterns are registered to within 100 microns.   
   
   
       15 . The system of  claim 14 , wherein the first and second patterns are not the same. 
   
   
       16 . The system of  claim 14 , wherein the third pattern comprises a cured liquid. 
   
   
       17 . The system of  claim 14 , wherein the fourth pattern comprises a cured liquid. 
   
   
       18 . The system of  claim 14 , wherein the third pattern comprises a liquid and the fourth pattern comprises a cured liquid. 
   
   
       19 . The system of  claim 14 , wherein the third pattern comprises a plurality of cylindrical lenses. 
   
   
       20 . The system of  claim 14 , wherein the fourth pattern comprises a plurality of prismatic features. 
   
   
       21 . The system of  claim 14 , wherein the third pattern is a negative of the first pattern. 
   
   
       22 . The system of  claim 14 , wherein the fourth pattern is a negative of the second pattern. 
   
   
       23 . A method of making an article, comprising the steps of:
 forming a first pattern on a first major surface of a moving substrate;   forming a second pattern on a second major surface of the moving substrate, wherein the first and second patterns are registered to within about 100 microns.   
   
   
       24 . The method of  claim 23 , wherein the first major surface forms an interface between the first pattern and the moving substrate. 
   
   
       25 . The method of  claim 23 , wherein the second major surface forms an interface between the second pattern and the moving substrate.