Design method for printing ink hole plugging tool

Abstract

The invention provides a design method for a printing ink hole plugging tool. The design method comprises the steps that a base plate is placed on a PCB, an inverted-cone-shaped hole is formed in the base plate, the position of the inverted-cone-shaped hole is matched with that of a plug hole formed in the PCB, the size of the lower surface of the inverted-cone-shaped hole is matched with that of the plug hole, the axial section of the inverted-cone-shaped hole has the inclination degree, and therefore printing ink can be subjected to pushing force applying into the inverted-cone-shaped hole when squeegee is screen-printed to the inverted-cone-shaped hole. According to the design method, the hole plugging force is increased, the hole plugging fullness can be effectively guaranteed, the product quality is improved, and the good rate of finished products is guaranteed; the stressed area of the squeegee is increased, the hole plugging efficiency is effectively improved, and the hole plugging time is shortened.

Description

technical field [0001] The invention relates to the field of via green oil or resin hole filling in the process of PCB production, in particular to a design method for an ink plugging tool. Background technique [0002] As the number of PCB board layers increases and the thickness of the board gradually increases, in order to save wiring space, the aperture of the via hole is also getting smaller and smaller. Under this background, the problem of ink plugging in the via hole is becoming more and more difficult. Traditional The most common method of plugging holes is to use aluminum sheets to make screens or screen printing plug holes, but as the diameter of via holes becomes smaller and the depth of holes becomes deeper and deeper, it is difficult for this method to meet the requirements of hole filling, and it is impossible to plug the holes. full. [0003] At present, the design of the ink plug hole tool adopts the cylindrical hole of the aluminum sheet, and the aperture ...

AI Technical Summary

Problems solved by technology

[0002] As the number of PCB board layers increases and the thickness of the board gradually increases, in order to save wiring space, the aperture of the via hole is also getting smaller and smaller. Under this background, the problem of ink plugging in the via hole is becoming more and more difficult. Traditional The most common method of plugging holes is to use aluminum sheets to make screens or screen printing plug holes, but as the diameter of via holes becomes smaller and the depth of holes becomes deeper and deeper, it is difficult for this method to meet the requirements of hole filling, and it is impossible to plug the holes. full

[0003] At present, the design of the ink plug hole tool adopts the cylindrical hole of the aluminum sheet, and the aperture of the cylindrical hole of the aluminum sheet is adapted to the aperture size of the corresponding plug hole on the PCB board, so as to prevent printing offset. When printing, the cylindrical hole of the aluminum sheet The effective area after overlapping with the PCB hole is π, so the diameter of the cylindrical hole of the unilateral aluminum sheet cannot improve the plugging capacity (such as figure 1 and figure 2 shown)

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