Patent ID: 9481112
Filing Date: 2016-11-01
CPC Classification: B29C,G03F

Claim Text:
1. A method for forming a cylindrical mask configured to have one or more features formed on a surface with a cylindrical master mold assembly, wherein the master mold assembly comprises a cylindrical patterned component having a first radius and a sacrificial casting component having a second radius, wherein the second radius is smaller than the first radius, wherein a surface of the patterned component facing the sacrificial casting component has one or more patterned features, the method comprising: a) co-axially inserting the sacrificial casting component into the cylindrical patterned component; b) filling a space between the cylindrical patterned component and the sacrificial casting component with a liquid precursor; c) curing the liquid precursor to form the elastomeric material; and d) removing the sacrificial casting component; and e) pulling the elastomeric material back over itself in a direction parallel to the axis of the patterned component, such that the elastomeric material is removed from the patterned component and is turned inside out.