KR-20260066311-A - Metal mask-based spray printing devices for improved print quality

Abstract

The present invention relates to a metal mask-based spray printing device for improving print quality, wherein a metal mask having a stencil pattern formed thereon and a printing substrate are sequentially stacked, and ink is sprayed onto the printing substrate by spraying ink through a spray formed on the upper surface of the metal mask. The device comprises: a fixing chuck for fixing the metal mask and the printing substrate; an actuator formed on the fixing chuck for forming an incline on the printing substrate; and a control unit that transmits a control command to the actuator to form an incline on the printing substrate when the spray is executed. The device is characterized by tilting the printing substrate when the spray is executed to allow ink to flow within the stencil pattern, thereby ensuring that the ink is evenly applied within the stencil pattern. The present invention has the advantage of providing a metal mask-based spray printing device with improved print quality that eliminates ink quality damage caused by a bridge pattern installed for stencil protection.

Inventors

• 정성일
• 김판겸
• 하태규

Assignees

• 한국전기연구원

Dates

Publication Date

20260512

Application Date

20241104

Claims (6)

1. In a metal mask-based spray printing device that sequentially stacks a metal mask having a stencil pattern and a printing substrate, and prints the printing substrate by spraying ink through a spray formed on the top of the metal mask, A fixing chuck for fixing the above metal mask and printed circuit board; An actuator formed on the fixed chuck above to form an incline on the printed circuit board; and A control unit that transmits a control command to the actuator to form a slope on the printed circuit board when the spray is executed; It is composed including A metal mask-based spray printing device with improved print quality, characterized by tilting the printing substrate during spray execution to allow ink to flow within the stencil pattern so that the ink is evenly applied within the stencil pattern.
2. In paragraph 1, the fixed chuck is A metal mask-based spray coating device for improving print quality, characterized by being formed with a vacuum chuck that fixes the metal mask and the printed circuit board using vacuum pressure.
3. In paragraph 2, the vacuum chuck is It is installed below the above metal mask and printed circuit board. A printed circuit board groove formed in the center to accommodate a printed circuit board; A vacuum channel formed on the outer periphery of the above-mentioned printing board groove and connected to the outer periphery of the lower surface of a metal mask having a larger area than the printing board, thereby fixing the metal mask and the printing board by vacuum pressure; O-ring grooves formed on the outer periphery of the vacuum channel and formed on the outer periphery of the lower surface of the metal mask; and An O-ring inserted into the above O-ring groove to maintain vacuum pressure; A metal mask-based spray coating device for improving print quality, characterized by being configured to include
4. In paragraph 3, the vacuum chuck is An ink collection groove formed along the outer edge of the metal mask and around the outer periphery of the O-ring groove to collect residual ink; A metal mask-based spray coating device for improving print quality, characterized by being configured to include additional components.
5. In paragraph 1, the control unit A metal mask-based spray coating device for improving print quality, characterized by controlling the inclination of the printed substrate at an inclination of 5° or less.
6. In paragraph 1, the control unit A metal mask-based spray coating device for improving print quality, characterized by controlling the printing board tilt time in conjunction with the operation of the spray device.

Description

Metal mask-based spray printing devices for improved print quality The present invention relates to a metal mask-based spray printing device for improving print quality, and more specifically, to a technology for improving spray printing quality using a metal mask having a bridge pattern formed thereon for protecting a stencil pattern. Metal mask-based spray printing is a printing method that uses a metal mask, created by punching tiny holes in a thin metal plate, to precisely spray substances such as ink. Metal mask-based spray printing can form desired patterns according to the hole shapes of the metal mask, and is particularly useful for forming fine circuit patterns. Since such fine holes are formed using a stencil method, they are called stencil patterns. Metal mask-based spray printing can achieve high precision by precisely spraying ink through the stencil pattern, and since the ink thickness can be maintained uniformly by adjusting the ink spray pressure and distance, it is possible to form fine patterns at the micrometer or nano scale. The above ink can utilize various functional materials such as adhesives, metals, and ceramics, and since it allows printing on flexible substrates and rapid printing over large areas, it is used in the fabrication of electronic circuits, semiconductors, sensors, displays, printed circuit boards, biosensors, or solar cells. Prior art regarding metal mask-based spray printing includes Korean Patent Application No. 10-2013-0048698, Korean Patent Application No. 10-2020-0140852, Korean Patent Application No. 10-2021-0139842, and Korean Patent Application No. 10-2023-0057579, which contribute to improving the precision of stencil patterns. As mentioned above, metal mask-based spray printing technology is used for micro or nano-scale ultrafine printing, and the aforementioned prior art introduces a bridge pattern for protecting stencil patterns at such ultrafine scales. More specifically, the stencil serves as an ejection space for printing ink formed on a metal mask; in the case of the wiring pattern of a touch module, it is formed as a thin and long pattern, which carries a risk of damage or deformation, and it is impossible to form circular or mesh patterns. To this end, a stencil support is formed in the shape of a screen, and in the following description, the structure supporting the stencil is defined and described as a 'bridge or bridge pattern'. However, in the case of spray printing, since ink is sprayed from above the metal mask in a normal direction to the printing surface, a technical problem is observed where bridge patterns installed for stencil protection are implemented in the print, damaging the ink quality. Meanwhile, in the case of spray printing, ink is applied to the front surface of the printed circuit board, but there is a technical problem that a method for recovering residual ink remaining on the surface of the metal mask is required. FIG. 1 is a configuration diagram of the present invention FIG. 2 is a side cross-sectional structural diagram of the vacuum chuck of the present invention. FIG. 3 is a planar structural diagram of the vacuum chuck of the present invention. FIG. 4 is an exemplary illustration of an embodiment of the present invention. FIG. 5 is an exemplary illustration of a metal mask-based spray printing embodiment using the present invention. The present invention will be examined below with reference to the drawings. In describing the present invention, if it is determined that a detailed description of related known technologies or configurations may unnecessarily obscure the essence of the invention, such detailed description will be omitted. Furthermore, the terms described below are defined in consideration of their functions in the present invention; since these may vary depending on the intentions or practices of the user or operator, their definitions should be based on the content throughout this specification describing the present invention. Figure 1 below is a configuration diagram of the present invention, Figure 2 is a side cross-sectional structural diagram of the vacuum chuck (11) of the present invention, Figure 3 is a planar structural diagram of the vacuum chuck (11) of the present invention, Figure 4 is an exemplary embodiment of the present invention, and Figure 5 is an exemplary embodiment of metal mask-based spray printing using the present invention. As shown in the drawing, the present invention relates to a metal mask-based spray printing device for improving printing quality, and is largely composed of a metal mask (30) having a stencil pattern (40) formed thereon, a printing substrate (20), a spray (60), a fixing chuck (10), an actuator (not shown), and a control unit. Hereinafter, the present invention will be examined together with Fig. 1. As shown in FIG. 1, the present invention sequentially stacks a metal mask (30) having a stencil pattern (40) formed thereon and a printed substrate (20), and a spr