Lithographic Apparatus for Flexible Substrates

The patent changes the temperature parameter from high (traditional lithography) to low temperature processing, enabling flexible substrate compatibility while maintaining pattern fabrication capability. This is achieved through cold spray deposition followed by selective laser sintering, which operates at temperatures that do not damage the flexible substrate.

The patent replaces the traditional thermal-based lithographic process with a mechanical deposition process (cold spray) followed by localized thermal processing (laser sintering). This substitution allows for low temperature processing that preserves substrate integrity while still achieving permanent pattern bonding.

The patent introduces nanoparticles as an intermediary material that bridges the gap between stability and mobility requirements. The nanoparticles serve as stable carriers for charge, providing both the desired charge carrier mobility and compositional stability that pure organic ink materials cannot achieve alone.

The patent uses composite nanoparticle materials that combine the advantages of stability and high charge carrier mobility. These composite materials overcome the limitations of single-material inks by integrating multiple functional properties into a single deposition medium.

The patent extracts the material deposition function from the traditional aerosol nozzle system and separates it from the patterning function. By using cold spray for uniform material deposition and then using selective laser sintering for pattern definition, the long transient regime of aerosol nozzles is eliminated while maintaining additive manufacturing capability.

The patent segments the printing process into two distinct stages: (1) uniform material deposition via cold spray, and (2) selective pattern formation via laser sintering. This segmentation allows each stage to be optimized independently, eliminating the transient regime problem while achieving precise pixel-type patterning.

The patent performs preliminary uniform deposition of nanoparticles across the entire substrate using cold spray technology. This preliminary action ensures sufficient nanoparticle concentration and coverage before the selective patterning step, enabling micrometer resolution without requiring multiple print passes or complex ink formulations.

The patent replaces the traditional inkjet or aerosol deposition mechanism with cold spray technology, which provides superior material utilization and uniform deposition. This mechanical substitution enables single-step deposition with sufficient nanoparticle concentration for high-resolution patterning, eliminating the need for multiple print steps.