Window thermal transfer device and method for mobile device and tablet PC

Abstract

The present invention relates to a method for forming a printed layer through thermal transfer. More particularly, the present invention relates to a window thermal transfer method for a mobile device or a tablet PC, which can eliminate demerits generated in a conventional hot stamping method and thermal transfer method through a heating roller by using a temporary bonding or main bonding process, and improve yield and printing quality. Also, the present invention relates to a window thermal transfer method for the mobile device or the tablet PC, which prevents printing errors of an edge or corner of a base film while a printing area of a transfer film to be transferred to the base film is larger than that of the base film, improves yield, and reduces prime cost.

Description

technical field [0001] The present invention relates to a method of forming a printed layer by thermal transfer, and more particularly, to a window thermal transfer method for a mobile device or a tablet personal computer (PC), in which a thermal stamping method-based temporary joining process and a roller-based method are used. The main joining process is to make up for the shortcomings of the hot stamping method and the roller method, and to improve the yield and printing quality. Furthermore, the present invention relates to a window heat transfer method for mobile devices or tablet PCs, in which heat transfer is performed under the condition that the printed area of ​​the transfer film to be transferred to the base film is larger than the base film, thereby preventing corners or Misprinting at the edges, thereby increasing yield and reducing costs. Background technique [0002] Mobile devices such as smartphones and tablet PCs include a touchpad as an input device, and ...

AI Technical Summary

Problems solved by technology

[0007] However, the conventional roller method has a problem that the quality of printing is lowered due to uneven transfer because the pressing pressure of the roller moving on the surface of the transfer object is not equal between the center area and the edge area of ​​the transfer object

In addition, the roller method has the problem that unevenness or foaming occurs due to the movement of the ink used in printing while moving the roller

[0008] Meanwhile, the conventional hot stamping method has a problem that a difference in quality of thermal transfer printing occurs depending on the flatness of the pressing jig and the transfer object in contact with the jig, which causes ink detachment and foaming

Also, this hot stamping method requires frequent changes of jigs, which leads to increased costs and reduced productivity

[0009] In addition, the conventional heat transfer method has a problem that when an uneven pressure is applied to the surface of the base film or when the pressure varies because the base film to be used as the transfer target object and the transfer film to be transferred are manufactured to have the same size, When the printing layer is printed, the printing quality is deteriorated or misprinting may occur because the printing layer is not transferred evenly or the printing area is not formed within the corner or edge of the base film

As a result, yields are reduced and costs are increased

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