APPLICATIONS
Lithography Operation with Holoprint
Once the design is finalized, the production process moves to the lithography operation stage. ROEM's Holoprint operating system controls our proprietary line of maskless nano-visual lithography machines. The Holoprint system is designed for ease of use, featuring an intuitive interface that allows operators to load design files, configure exposure parameters, and execute the lithography process with minimal training.
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Exposure onto Photoresist Glass Plate
The lithography process begins with a glass substrate coated with a thin layer of photoresist material, typically approximately 3 micrometers in thickness. The photoresist is a light-sensitive organic compound that undergoes chemical changes when exposed to specific wavelengths of light. The glass plate is mounted on the lithography machine's precision motion platform, which provides sub-micron positioning accuracy.
ROEM's DK series浮雕 (relief) lithography machines use a focused laser beam to directly write the designed pattern onto the photoresist surface. Unlike traditional holography that requires physical masks, our maskless approach uses algorithmic control to modulate the laser beam's intensity, position, and dwell time as it scans across the photoresist surface. The laser creates microscopic grooves, ridges, and structures of varying depths, widths, and densities according to the design file. Groove depths can range from shallow surface textures to structures up to 10 micrometers deep.
The precision of this process is remarkable. Our DK series machines achieve lithographic precision of 0.5 micrometers, with writing speeds of up to 20 square centimeters per hour and maximum lithography dimensions of 500 x 500 millimeters (customizable for larger formats). The algorithm controls the shape, width, depth, and density of each microstructure groove, and the combination of these micro-structures determines how light will be diffracted and reflected when the final product is viewed. Different groove geometries produce different optical effects: closely spaced parallel lines create diffraction gratings that split white light into spectral colors; curved grooves create lens-like focusing effects; and complex multi-level structures create three-dimensional depth perception.
After laser exposure, the glass plate undergoes a chemical development process where the exposed photoresist is selectively dissolved, revealing the micro-structured surface relief pattern. The developed glass master now carries the complete holographic image as a physical topography of microscopic grooves and ridges. This glass master is the foundational origination from which all subsequent copies will be made.
ROEM also offers the Matrix3D animated motion lithography machine for true-color 3D animated effects, and the CK-2 true-color lithography machine capable of producing full-color optical images without any ink. These advanced machines expand the creative possibilities beyond traditional grayscale lithography into the realm of vivid, photorealistic optical imagery.
