The EVG770 NT is a versatile platform for step-and-repeat (S&R) nanoimprint lithography for efficient master fabrication or direct patterning of complex structures on substrates. This approach allows uniform replication of templates from small dies up to 30 cm². The S&R process allows to replicate those dies multiple times over large areas up to Gen2 panel-size substrates. In combination with diamond turning or direct writing methods, S&R imprinting is frequently used to efficiently fabricate masters required for wafer-level optics manufacturing or EVG’s SmartNIL process. Thus, it is often a crucial prerequisite for high volume manufacturing of augmented reality waveguides, optical sensors, diffractive optics, metasurfaces or biomedical devices.
Key features of the EVG770 NT include precise alignment capabilities, full process control and the flexibility to address process requirements of a wide variety of structures and materials.
High-quality master fabrication of microlenses for wafer-level optics down to nanostructures for SmartNIL®
Efficient scaling to large substrate sizes up to panel size
Simple implementation of different types of masters
Variable resist dispense modes
Live image during dispensing, imprinting and demolding
In-situ force control for imprinting and demolding