Patent ID: 8147235
Filing Date: 2012-04-03
Classification: B82Y,G03F,H05K

Abstract:
1. Apparatus for transferring a pattern from a template having a structured surface to a substrate carrying a surface layer of a radiation polymerisable fluid, said apparatus comprising a first main part and a second main part having opposing surfaces, means for adjusting a spacing between said main parts, support means for supporting said template and substrate in mutual parallel engagement in said spacing with said structured surface facing said surface layer, a radiation source devised to emit radiation, for solidifying said layer, into said spacing, a flexible membrane configured to overlie both the template and the substrate, a cavity having a first wall, the first wall comprising the flexible membrane devised to engage either said template or said substrate, and means for applying an adjustable overpressure to a medium present in said cavity wherein said membrane is transparent to a wavelength range of said radiation, said radiation source being positioned behind said membrane, and said substrate being positioned outside of said pressurized cavity, and wherein said membrane is devised to transfer said overpressure to said template or to said substrate and thereby to arrange said template and said substrate in parallel relation to one another by obtaining an even distribution of force over the whole of a contact surface between the substrate and the template.