RU1815239C - Method for producing microcircuit picture by templet printing method - Google Patents

Abstract

Usage: in screen printing. SUMMARY OF THE INVENTION: at the beginning of the paste application process, fill the holes of the stencil with a counter-grill, and then align the paste in the holes of the stencil while squeezing it onto the substrate with a doctor blade located at an angle of 100-160 °; to the print surface. 1 ill., 1 tab.

Description

The invention relates to a technique in which the use of screen printing is possible, in particular in the production of gas-discharge devices.

An object of the present invention is to improve the quality of prints.

The drawing shows a diagram of the proposed method of image acquisition.

The method consists in pressing a stencil 2 onto a substrate 1, filling the holes in the stencil 2 with a paste 4 using counter-rake 3, and then aligning it in the holes of the stencil with simultaneous rattling of the paste onto the substrate with a squeegee 5 located at an angle of 100-160 ° to the surface of the stencil .

If during printing the angle of inclination of the squeegee will be less than 100 °; then the rakel blade exerts strong pressure on the paste and it can leak under the stencil. As a result of this, the imprint is crushed on the substrate and, as a result, the scatter of the geometrical dimensions of the imprint sharply increases.

When the angle of inclination of the squeegee is more than 160 °, the pressure on the paste caused by the movement

squeegee, is insufficient and does not provide the protrusion of the paste from the holes in the stencil onto the substrate. The consequence of this is a large variation in the thickness of the print on the substrate.

In order to achieve the required accuracy in the formation of prints according to the proposed technical solution, it is necessary to use pastes with viscosities from 2000 to 10000 Pe. When using pastes with a viscosity of less than 2000 Pe, the imprint has an increased geometrical size due to spreading it after separation of the stencil.

The use of pastes with a viscosity of more than 10,000 Pe does not completely fill all the holes in the stencil. And when the squeegee moves, it is cleaned without being pressed onto the substrate.

The invention is illustrated by an example.

A stencil made of a metal tape 0.2 mm thick was used to form the prints in the form of stripes. The imprint was formed on a glass substrate with elements in the form of barriers.

WITH

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hundredth 0.15 mm, in the direction perpendicular to the arrangement of the barriers. Printing mode: the speed of movement of the doctor blade 52 mm / sec, the pneumatic pressure on the doctor blade - 9.81 104 n / m2. The formation of the elements was carried out according to the method with the angles of inclination of the squeegee 95 °, 100 °, 110 °, 160 °, 165 °, and the counter-rocket - 60 °. The viscosity of the paste is 8400 Pz. The pattern on the stencil is made in the form of through longitudinal strips 0.47 mm wide and 190 mm long. The location of the bands parallel to the course of the squeegee. Fingerprint parameters are given in the table.

Thus, the proposed image acquisition method allows

to increase the accuracy of prints and makes it possible to form dividing elements on a relief surface.

Claims (1)

SUMMARY OF THE INVENTION A method for producing an image of a microcircuit by screen printing, which consists in aligning the paste on the screen with a countergun and forcing it through the screen with a squeegee, characterized in that in order to improve the quality of the prints when forcing the paste through the stencil, the squeegee is placed at an angle of 100-160 ° to the surface of the stencil. YU