Printing screen and method for imaging a printing screen

Abstract

The invention relates to a printing screen with at least one screen-like fabric layer (1) as a carrier structure with fabric threads (6) oriented at an angle to one another and with an imaged stencil layer ( 2), wherein the stencil layer (2) and the fabric layer (1) are connected to each other, and the stencil layer (2) is provided with channels (3). According to the invention, each channel (3) has a smaller opening (9) on the printing material side (4) of the printing screen (10) than on the squeegee side (5) of the printing screen (10), and each The channel forms a continuous channel. Such a printing screen (10) has sufficient stability and advantageously allows printing of very fine lines and dots. The invention also relates to methods for imaging such printing screens.

Description

technical field

[0001] The invention relates to a printing screen for screen printing processes having the features described in the preamble of claim 1 . Background technique

[0002] The industrial use of screens and fabrics is known in many fields.

[0003] Screens used for screening purposes usually have square mesh openings. This mesh shape has also been used in the printing industry. With existing photosensitive layers and known application methods, acceptable image resolution can only be achieved with a large number of "supports". This is why the use of high mesh fabrics is becoming more and more common.

[0004] The field of printed electronics requires the use of the thinnest possible screens or fabrics made of the thinnest possible threads to provide smooth flow of paste and to enable printing of very complex images.

[0005] The field of coating solar cells, i.e. metallized solar cells, requires the application of large amounts of paste and very precise and hi...

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