Personne
Johana Bernasconi
Cette personne n’est plus à l’EPFL
Publications associées (7)
Spatial coherence properties of an LED-based illumination system for mask-aligner lithography
Hans Peter Herzig, Toralf Scharf, Wilfried Noell, Raoul Kirner, Johana Bernasconi
A high-power LED-based illumination system has been developed as a replacement for the mercury arc lamps used in mask-aligner lithography. LEDs are arranged in a grid array and placed in the entrance aperture of individual reflectors. Those reflectors decr ...
SPIE2019High power ultraviolet LED illumination systems: coherence properties and applications in photolithography
Mask-aligner photolithography is a technology used to replicate patterns from a mask to a photosensitive substrate. It is widely used in the fabrication of MEMS and micro-optical components, and for other applications with dimensions in the micrometer rang ...
EPFL2018High power modular LED-based illumination system for lithography applications
Hans Peter Herzig, Marcel Groccia, Toralf Scharf, Wilfried Noell, Raoul Kirner, Johana Bernasconi
Mask-aligner lithography is a technology used to transfer patterns with critical dimensions in the micrometer range from below 1 micron for contact printing to a dozen of microns in proximity printing. This technology is widely used in the fabrication of M ...
2018High-power modular LED-based illumination systems for mask-aligner lithography
Hans Peter Herzig, Toralf Scharf, Johana Bernasconi
Mask-aligner lithography is traditionally performed using mercury arc lamps with wavelengths ranging from 250 nm to 600 nm with intensity peaks at the i, g and h lines. Since mercury arc lamps present several disadvantages, it is of interest to replace the ...
2018Coherence management in lithography printing systems
Hans Peter Herzig, Toralf Scharf, Johana Bernasconi
In proximity lithography, interference and diffraction effects arise when printing small features because of the proximity gap. Different techniques are used in order to control and take advantage of theses effects. In this paper, the focus is set on the M ...
Spie-Int Soc Optical Engineering2016Structured amplitude and phase fields behind microstructures: The quest for high contrast modulation at proximity
Hans Peter Herzig, Toralf Scharf, Myun Sik Kim, Krishnaparvathy Puthankovilakam, Johana Bernasconi
Microstructures can be used to realize repetitive and singular high contrast features at different distances behind a structure. For practical applications, the amplitude field needs to be considered. To realize defined amplitude features at long distances ...
Spie-Int Soc Optical Engineering2016High-power modular LED-based illumination systems for mask-aligner lithography
Hans Peter Herzig, Toralf Scharf, Johana Bernasconi
Mask-aligner lithography is traditionally performed using mercury arc lamps with wavelengths ranging from 250 nm to 600 nm with intensity peaks at the i, g and h lines. Since mercury arc lamps present several disadvantages, it is of interest to replace the ...
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