JPS5948755B2 - Transfer method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer method, which prevents wrinkles that occur on a transfer sheet, that is, a pattern support sheet, from curling during the transfer, smoothes the transfer operation, and eliminates sheet waste. The present invention relates to a transfer method devised as follows.

The transfer method to be improved by the present invention is such that a pattern support sheet supporting a desired transferably activated pattern on one surface of the thin film is fed onto a solution of the thin film, floated thereon, and then floated on top of the solution. The object to be transferred is placed on the sheet and allowed to settle in the liquid, thereby transferring the pattern onto the object. However, in the above method, when the sheet 51 reaches the surface of the solution as shown in the first figure, if the sheet is continuous, both ends along the feeding direction will curl A. This may cause problems with transcription.

This phenomenon is caused by a pattern 1 on the entire surface of the thin film 10 as shown in the second figure.
This becomes noticeable when the sheet 52 is composed of a sheet 52 having a thickness of 2.

This is thought to be because the thin film 10 swells as soon as it comes into contact with the solution, causing a difference in elongation between the front and back sides of the sheet, and the difference in elongation is further amplified by the pattern ink on the surface layer. This curl A gradually disappears as the thin film 10 of the sheet 51 swells with the solution, but it takes time to eliminate it, and even if it does, the pattern will be disturbed and the transfer operation will be hindered. This is an undesirable phenomenon because it may not be partially resolved.

On the other hand, as a means to prevent the above-mentioned curling phenomenon, as shown in the third figure, the pattern ink on both sides C of the sheet 53 is removed with a squeegee or the like before it floats on the solution, or the pattern ink does not reach both sides C of the sheet. It is also possible to prevent extreme differences in elongation due to swelling of the sheet from occurring on the front and back sides on both sides of the sheet by printing a pattern as described above.

However, even in this case, a difference in elongation occurs between the front and back surfaces of the thin film itself, so the curling phenomenon cannot be completely prevented.

The present invention aims to provide a method capable of preventing the above-mentioned curling of a sheet, thereby making it possible to perform the transfer operation smoothly.

Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings.

FIG. 4 shows the process of carrying out the transfer operation. In the figure, 14 is a tank, 16 is a liquid stored in the tank, 18 is an object to be transferred, and S is a pattern support sheet to be transferred.

The pattern support sheet S is provided with a large number of small holes 20 at equal pitches on its side edge, as shown in the fifth figure, or on its periphery, as shown in the sixth figure.

The sheet S4, which has small holes in its side edges, is continuously or intermittently fed onto the liquid and subjected to transfer. The small holes 20 may be provided in the membrane 10 before activation of the ink of the pattern 12, or alternatively may be provided after activation.

The pattern support sheet S4 may be floated on the liquid 16 after being formed into sheets.

FIG. 6 shows an example of such a case, in which small holes 20 are provided all around the single wafer pattern support sheet S. Also the 7th
8 shows a modified embodiment. In the case of the continuous sheet S6 shown in FIG. 20 is provided, and the sheet S shown in FIG.
7, a margin C is formed around the entire circumference of the thin film 10, and a small hole 20 is provided there. When printing pattern 12, the above-mentioned margin area C is printed on the printing plate in advance.
It is formed by forming the paper so as to be formed, or by performing printing on the entire surface and then operating the margin portion C with a squeegee.

The small holes 20 can also be made by any means such as a punch and die or by partial incineration with a heating rod.
(not shown).

The sheet S constructed as described above is floated on the surface of the solution 16 of the thin film 10 with its pattern side facing up, and after the thin film is suitably swollen by the solution, the transferred material 1
8 is applied to the pattern surface with its transfer surface facing down,
As shown by the chain line 22, it is deposited in the liquid and transferred.

Since the pattern ink is activated and has adhesive properties, it easily adheres to the surface to be transferred. After the object to be transferred is lifted out of the liquid, the attached thin film is removed, and the transfer is completed. Here, the pattern ink of the sheet S needs to be activated before being supplied onto the solution solution, and the pattern ink must follow the swelling of the thin film caused by the thin film 10 adhering to the solution solution 16. However, since the degree of swelling of the thin film is greater, the periphery of the sheet tends to curl A as shown in the first diagram.

However, according to the present invention, the curling phenomenon is completely prevented by the action of the small holes 20 provided in the sheet S. This small hole 2
Although the reason why curling is prevented by 0 is not completely elucidated, it is thought that the curl 24 generated at the edge of the sheet and the curl 26 generated from the vicinity of the hole on the opposite side maintain a balance as shown in Figure 9. .

Therefore, it may be better to provide the small holes 20 with a small pitch and as close to the edge of the sheet S as possible.

Also, it may be better to make the small holes oval, square, or other shapes rather than circular as shown. In addition, in the case of the sheet S6 shown in FIGS. 7 and 8, since the side edges of the sheet are only thin films, it is thought that the degree of curling phenomenon is lower than that shown in FIGS. 5 and 6. However, if no measures are taken here, it is conceivable that the thin film will come into contact with the solution 16 from one side, causing a difference in elongation between the front and back surfaces, which will cause a curling phenomenon.

However, even in this case, curling is sufficiently prevented by the small holes 20.

Now, as described above, in the present invention, a large number of small holes 20 are provided in advance on the side edge or peripheral edge of the pattern support sheet S, and the solution is supplied onto the surface of the dissolving liquid 16, and then the transfer is performed, so that the thin film of the sheet is Even if the sheet swells rapidly, the curling phenomenon is effectively prevented, the pattern is not disturbed, the transfer can be performed accurately, and the sheet can be used efficiently.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a curled pattern support sheet, Figure 2 is a perspective view of a curled pattern support sheet;
3 and 3 are perspective views of the pattern support sheet before curling. FIG. 4 is an explanatory diagram of the transfer process. 5 to 8 are perspective views of different embodiments of the pattern support sheet applied to the present invention. FIG. 9 is an explanatory diagram of the reason for preventing the curl phenomenon. S...Pattern support sheet, 1
0...Den film, 12...Pattern, 16.
...Dissolution solution, 18...Transferred material, 20.
...Small hole.

Claims (1)

[Claims] 1. Float a pattern support sheet on which a desired transferably activated pattern is supported on one side of the thin film with the pattern side facing up on the surface of the solution of the thin film, and then apply the transfer object to the sheet and apply the above. In a method of transferring the pattern to an object by settling part or all of the sheet together with the liquid in a liquid, after providing a large number of small holes on the side edge or peripheral edge of the pattern support sheet, the sheet is placed at the liquid level. A transfer method characterized by floating on top.