Squeeze for screen printer

Abstract

Disclosed is a squeeze for a screen printer. The present invention provides a squeeze for a screen printer, which coats a printed circuit board with an adhesive paste while moving parallel over a metal mask on the printed circuit board, the printed circuit board being open through an opening of the metal mask, the squeeze including a solvent storage unit for storing solvents; and solvent discharging holes for discharging the solvents, stored in the solvent storage unit, to an adhesive paste. Accordingly, the squeeze for a screen printer of the present invention may be useful to prevent a dog ear phenomenon, namely that an adhesive paste layer is asymmetrically formed in an indented manner, by controlling a viscosity of an adhesive paste by discharging a solvent onto an adhesive paste layer that comes in contact with the squeeze when the adhesive paste layer is formed in the printed circuit board.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Other objects and aspects of the present invention will become apparent from the following description of embodiments with reference to the accompanying drawings. However, it should be understood that the description proposed herein is just a preferable example for the purpose of illustrations only, not intended to limit the scope of the invention. In the drawings:

FIG. 1 is a schematic view showing a procedure for coating a printed circuit board with an adhesive paste using a squeeze for a screen printer.

FIG. 2 is a schematic view illustrating a dog ear phenomenon caused in the adhesive paste when the printed circuit board is coated with an adhesive paste using the squeeze for a screen printer.

FIGS. 3A, 3B and 3C are cross-sectional views schematically showing a body of a squeeze for a screen printer according to one preferred embodiment of the present invention.

FIG. 4 is a schematic view showing a procedure for coating a printed circuit board with an adhesive paste using the squeeze for a screen printer according to one embodiment of the present invention, the squeeze having the body as shown in FIG. 3A.

FIG. 5 is a cross-sectional view showing that the printed circuit board is coated with the adhesive paste according to the procedure as shown in FIG. 4.

FIG. 6 is a cross-sectional view schematically showing a body of a squeeze for a screen printer according to another embodiment of the present invention.

FIG. 7 is a schematic view showing that an eddy current is generated in the solvent and the paste using the squeeze according to one embodiment of the present invention, the squeeze having the body as shown in FIG. 6.

Claims

1. A squeeze for a screen printer, which coats a printed circuit board with an adhesive paste while moving parallel over a metal mask on the printed circuit board, the printed circuit board being open through an opening of the metal mask, the squeeze comprising: a body having an inner space formed therein for storing solvents; andsolvent discharging holes formed in a surface of the body that comes in contact with the adhesive paste when the squeeze moves parallel over the metal mask.

2. The squeeze for a screen printer according to claim 1, wherein the body further includes an irregular structure for inducing an eddy current to mix the adhesive paste with the solvent discharged through the solvent discharging holes, the irregular structure being formed in the surface of the body that comes in contact with the adhesive paste when the squeeze for a screen printer moves parallel.

3. The squeeze for a screen printer according to claim 2, wherein a concave portion of the irregular structure is in a round shape.

4. A squeeze for a screen printer, which coats a printed circuit board with an adhesive paste while moving parallel over a metal mask on the printed circuit board, the printed circuit board being open through an opening of the metal mask, the squeeze comprising: a body including a chamber having an inner space formed therein for storing solvents; andsolvent discharging holes formed in a surface of the body that comes in contact with the adhesive paste when the squeeze moves parallel over the metal mask.

5. The squeeze for a screen printer according to claim 4, wherein the body further includes an irregular structure for inducing an eddy current to mix the adhesive paste with the solvent discharged through the solvent discharging holes, the irregular structure being formed in the surface of the body that comes in contact with the adhesive paste when the squeeze for a screen printer moves parallel.

6. The squeeze for a screen printer according to claim 5, wherein a concave portion of the irregular structure is in a round shape.