A screen printing apparatus for printing paste on a printed pattern of a print target constituted of a substrate or a plurality of aligned substrates includes a mask having a plurality of opening patterns different in size from one another. The screen printing apparatus images the substrate or one of the aligned substrates constituting the print target, and calculates a level of deformation by expansion and contraction of the print target, based on a result of the imaging. The screen printing apparatus then selects an opening pattern from among the opening patterns, based on the calculated level of deformation by expansion and contraction of the print target, brings the print target into contact with the mask to superimpose the selected opening pattern on the printed pattern, and deposits the paste on the printed pattern.

A screen printing apparatus for printing paste on a printed pattern of a print target constituted of a substrate or a plurality of aligned substrates includes a mask having a plurality of opening patterns different in size from one another. The screen printing apparatus images the substrate or one of the aligned substrates constituting the print target, and calculates a level of deformation by expansion and contraction of the print target, based on a result of the imaging. The screen printing apparatus then selects an opening pattern from among the opening patterns, based on the calculated level of deformation by expansion and contraction of the print target, brings the print target into contact with the mask to superimpose the selected opening pattern on the printed pattern, and deposits the paste on the printed pattern.

An apparatus that communicates with a screen printer and a solder inspection device is disclosed. The apparatus according to the present disclosure may include a process that is configured to: obtain first information associated with each of a plurality of pads on the substrate; obtain second information associated with each piece of the solder paste applied to each of the plurality of pads from the solder inspection device; determine a position correction value for the stencil mask with respect to the substrate based on the first information and the second information; and deliver the position correction value to the screen printer.

An apparatus that communicates with a screen printer and a solder inspection device is disclosed. The apparatus according to the present disclosure may include a process that is configured to: obtain first information associated with each of a plurality of pads on the substrate; obtain second information associated with each piece of the solder paste applied to each of the plurality of pads from the solder inspection device; determine a position correction value for the stencil mask with respect to the substrate based on the first information and the second information; and deliver the position correction value to the screen printer.

Disclosed are a screen printing stencil, a light guide plate and a display device. The screen printing stencil includes a pattern printing section arranged corresponding to a light guide plate to be printed, and at least one positioning mark hole arranged on the periphery of the pattern printing section. The light guide plate is manufactured using the screen printing stencil according to the embodiment of the invention by firstly aligning in position the pattern printing section of the screen printing stencil with the light guide plate to be printed, using the at least one positioning mark hole, and then printing on the light guide plate to be printed. A corresponding pattern of positioning marks is printed on the light guide plate in addition to the corresponding pattern. As compared with the prior art, the precision of aligning in position the screen printing stencil with the light guide plate to be printed can be improved to thereby improve the displaying quality of the display product.

Disclosed are a screen printing stencil, a light guide plate and a display device. The screen printing stencil includes a pattern printing section arranged corresponding to a light guide plate to be printed, and at least one positioning mark hole arranged on the periphery of the pattern printing section. The light guide plate is manufactured using the screen printing stencil according to the embodiment of the invention by firstly aligning in position the pattern printing section of the screen printing stencil with the light guide plate to be printed, using the at least one positioning mark hole, and then printing on the light guide plate to be printed. A corresponding pattern of positioning marks is printed on the light guide plate in addition to the corresponding pattern. As compared with the prior art, the precision of aligning in position the screen printing stencil with the light guide plate to be printed can be improved to thereby improve the displaying quality of the display product.

A photosensitive stencil includes a porous stencil carrier that can be a sheet of woven material with crisscrossing filaments. The stencil carrier is coated with a photopolymer emulsion that is water based to form a stencil blank. In use, a light mask is disposed atop the stencil blank. The light mask can be contained on a sheet of paper or a transparent film. Alternatively the stencil blank is fed through an inkjet printer and the light mask is printed directly onto the stencil blank using common inks. The stencil blank is then exposed to light for a few minutes, which cross-links the photopolymer emulsion in unmasked regions. After exposure, the stencil blank is developed by being washed out with water. The water removes emulsion and adhesive, where present, within areas that were masked by the light mask, revealing open or open regions through which ink or paint can be applied.

A photosensitive stencil includes a porous stencil carrier that can be a sheet of woven material with crisscrossing filaments. The stencil carrier is coated with a photopolymer emulsion that is water based to form a stencil blank. In use, a light mask is disposed atop the stencil blank. The light mask can be contained on a sheet of paper or a transparent film. Alternatively the stencil blank is fed through an inkjet printer and the light mask is printed directly onto the stencil blank using common inks. The stencil blank is then exposed to light for a few minutes, which cross-links the photopolymer emulsion in unmasked regions. After exposure, the stencil blank is developed by being washed out with water. The water removes emulsion and adhesive, where present, within areas that were masked by the light mask, revealing open or open regions through which ink or paint can be applied.

Thin films of precious metals such as platinum and gold have the required ability to withstand high temperatures, but in pure form can suffer from grain growth, agglomeration and dewetting at high temperature. Grain boundaries must therefore be pinned by alloying with other metals and/or by inclusion of non-metallic nanoparticles. While such bulk materials are known in the prior art, they have not existed previously as printable inks that can be deposited by additive manufacturing direct-write methods. These materials have been formulated for the first time as alloy and composite inks so that they may be applied by direct-write additive manufacturing techniques directly onto three-dimensional components or on high temperature substrates that can be adhered to complex components.

A method is disclosed for electroforming metal screen. The method deposits photoresist over a mandrel, and then exposes the photoresist with light through a plurality of openings in a photo tool to form hardened resist pillars. Unexposed photoresist is removed without affecting the resist pillars. The method then electroforms the metal screen in areas free of the hardened resist pillars such that the metal screen forms apertures defined by each of the resist pillars, a space between at least two of the resist pillars defining a support bar that forms at a reduced thickness as compared to portions of the metal screen that are not between the resist pillars. Finally, the method detaches the metal screen from the mandrel.