Eulitha A.g.

Christian Dais

Harun Solak

Francis Clube

Francis S M Clube

Harun H Solak

A method forms a pattern of metallic nanofeatures that generates by plasmonic resonance a desired image having a distribution of colors. The method includes providing a substrate having a layer of photosensitive material, exposing the layer to a high-resolution periodic pattern of dose distribution, and determining a low-resolution pattern of dose distribution such that the sum of the low-resolution pattern and the high-resolution periodic pattern of dose distribution is suitable for forming the pattern of metallic nanofeatures. The lateral dimensions of the metallic nano-features have a spatial variation across the pattern that corresponds to the distribution of colors in the desired image. The layer of photosensitive material is exposed to the low-resolution pattern of dose distribution. The layer of photosensitive material is developed to produce a pattern of nanostructures in the developed photosensitive material. The pattern of nanostructures is processed so that the pattern of metallic nanofeatures is formed.

Method for printing colour images

A method for printing a periodic pattern of features into a photosensitive layer includes providing a mask bearing a periodic pattern, providing a substrate bearing the photosensitive layer, and arranging the substrate substantially parallel to the mask. A beam of collimated monochromatic light is formed for illuminating the mask pattern so that the light-field transmitted by the mask forms Talbot image planes separated by a Talbot distance. N sub-exposures of the mask with the beam are performed and the separation between sub-exposures are changed so that the relative separation during the ith sub-exposure with respect to that during the first sub-exposure is given by (m+n/N) times the Talbot distance. The mask pattern is exposed to the same energy density of illumination for each sub-exposure, wherein the period is selected in relation to the wavelength so that only the zeroth and first diffraction orders are transmitted by the mask.

Methods and systems for printing periodic patterns

A lithographic method related to Talbot imaging for printing a desired pattern of features that is periodic or quasi-periodic in at least one direction onto a substrate surface, which method includes providing a mask bearing a pattern of mask features, arranging the substrate parallel and in proximity to the mask, providing an illumination source having a central wavelength and a spectral bandwidth, forming from said source an illumination beam with an angular distribution of intensity, arranging the distance of the substrate from the mask and exposing the mask pattern to said beam so that each angular component of illumination exposes the substrate to substantially the entire range of lateral intensity distributions that occur between successive Talbot image planes for the illumination wavelengths, wherein the angular distribution of the beam is designed in conjunction with the pattern of features in the mask and the distance of the substrate from the mask.

Lithographic fabrication of general periodic structures by exposing a photosensitive layer to a range of lateral intensity distributions

An apparatus and a method for printing a desired pattern into a photosensitive layer. A mask bears a pattern of linear mask features parallel to a first direction. The layer is arranged parallel to and separated from the mask. Substantially monochromatic light is generated and the mask pattern is illuminated with the light over a range of angles of incidence in a plane parallel to the first direction, at substantially a single angle in an orthogonal plane of incidence and so that the light of each angle of incidence transmitted by the mask forms a light-field component at the layer. The integration of the components prints the desired pattern. The range of angles is selected so that the integration of the components is substantially equivalent to an average of the range of transversal intensity distributions formed between Talbot image planes by light at one of the angles of incidence.

Apparatus and method for printing a periodic pattern with a large depth of focus

A method for printing a desired pattern into a photosensitive layer that includes providing a mask bearing a pattern of linear features that are parallel to a first direction, arranging the layer parallel to and separated from said mask, generating substantially monochromatic light, and illuminating the mask pattern with said light over a range of angles of incidence in a plane parallel to said first direction, at substantially a single angle in an orthogonal plane of incidence and so that the light of each angle of incidence transmitted by the mask forms a light-field component at the layer whereby the integration of said components prints the desired pattern, wherein the range of angles is selected so that the integration of said components is substantially equivalent to an average of the range of transversal intensity distributions formed between Talbot image planes by light at one of the angles of incidence.

Method and apparatus for printing a periodic pattern with a large depth of focus

A method for printing a pattern of features including the steps of providing a substrate having a recording layer disposed thereon, providing a mask bearing a periodic pattern of features, arranging the substrate parallel to the mask and with a separation having an initial value, providing an illumination system for illuminating the mask with an intensity of monochromatic light to generate a transmitted light-field for exposing the recording layer, and illuminating the mask for an exposure time while changing the separation by a distance having a desired value and with a rate of change of separation, wherein at least one of the rate of change of separation and the intensity of light are varied during the change of separation, whereby the mask is illuminated by an energy density per incremental change of separation that varies over said distance.

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Turgi, Switzerland

Christian Dais