Device and method for producing a screen printing stencil having

Details Device and method for producing a screen printing stencil having Device and method for producing a screen printing stencil having

1995-07-14

1998-10-13

Reinhart, Mark J.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

B41J 247

Patent

active

058219803

ABSTRACT:
A device for producing a screen printing stencil has a light source for emitting a bundle of light whose focus lies in the region of a light-sensitive layer present on a stencil screen. Furthermore, there is an apparatus for generating a relative movement between the bundle of light being incident on the light-sensitive layer in accordance with a desired stencil pattern. The bundle of light is linearly polarized in at least one section. An electro-optical modulator for rotating the plane of oscillation of the bundle of light is arranged in this section. The electro-optical modulator rotates the plane of oscillation of the bundle of light in accordance with received stencil pattern data. An analyzer is positioned in the light path downstream of the electron optical modulator. The analyzer passes the bundle of light having a plane of oscillation at one orientation and blocks the bundle of light having a plane of oscillation at an opposite orientation. As a result of the device, the bundle of light is able to be switched on and off of the light-sensitive layer very rapidly, which leads to extremely sharp edges of the pattern structure.

REFERENCES:
patent: 3664737 (1972-05-01), Lipp
patent: 3696742 (1972-10-01), Parts et al.
patent: 4553822 (1985-11-01), Mahlein
Patent Abstracts of Japan, vol. 11, No. 74 (M-568) (2521) Mar. 6, 1987; JPA-61-229560.

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