Abstract:
The present invention relates to a method and an apparatus for the photopolymerization and the washing in series of digital printing plates for flexography. The method according to the present invention is characterised in that it implements in series the exposure and washing steps of the printing plate, which is continuously moved. The present invention further concerns an apparatus adapted to implementing said method.
Abstract:
An optical wavelength dispersion device (10) includes a first substrate (11), an input unit (12) formed on the first substrate (11) having a slit (121) for receiving an optical signal, a grating (13) formed on the first substrate (11) for producing diffracted light beams from the optical signal, a first optical reflector (14) formed on the first substrate (11) for reflecting the diffracted light beams from the grating (13) for outputting, and a second substrate (16) covered on the top of the input unit (12) and the grating (13), wherein the input unit (12), the grating (13) and the first optical reflector (14) are formed from a photo-resist layer (111) by high energy light source exposure.
Abstract:
A method and apparatus for printing a pattern of periodic features into a photosensitive layer, including the steps of providing a substrate bearing the layer, providing a mask, arranging the substrate such that it has a tilt angle with respect to the substrate in a first plane orthogonal thereto, providing collimated light for illuminating the mask pattern so as to generate a transmitted light-field composed of a range of transversal intensity distributions between Talbot planes separated by a Talbot distance, and so that said transmitted light-field has an intensity envelope in the first plane, illuminating the mask with said light whilst displacing the substrate relative to the mask in a direction parallel to the first plane and to the substrate, wherein the tilt angle and the intensity envelope are arranged so that the layer is exposed to an average of the range of transversal intensity distributions.
Abstract:
The present invention solves the stitching problem and the problem of a predetermined integer number of grating lines per closed circle of a cylindrical grating by resorting to a novel phase mask method which proposes to geometrically transform and to optically transfer a standard planar radial grating pattern (1) into a cylindrical photoresist pattern (9) at the circularly cylindrical wall (7) of a given element (3). The planar radial grating pattern can be easily written with an integer number of lines having strictly constant period without any stitching problem by means of the available tools of planar technologies such as a laser or electron beam generator and reactive ion etching. The photolithographic transfer is made by illumination means (19) which permit the needed geometrical transformation from a planar radial grating to a circularly cylindrical grating, in particular by providing a cylindrical wave having a non-zero axial component and the same central axis (A) as said circularly cylindrical wall or a spherical wave (B) with its center on this central axis.
Abstract:
Dry adhesives and methods for forming dry adhesives. A method of forming a dry adhesive structure (30) on a substrate (10), comprises: forming a template backing layer (12) of energy sensitive material on the substrate (10); forming a template layer (14) of energy sensitive material on the template backing layer (12); exposing the template layer (14) to a predetermined pattern of energy; removing a portion of the template layer (14) related to the predetermined pattern of energy, and leaving a template structure (20) formed from energy sensitive material and connected to the substrate (10) via the template backing layer (12).