JP2521299B2 - Character mask for laser mark - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a laser mark character mask used in laser marking, and more specifically, by connecting a blank display character to a mask plate surface, The present invention relates to an improvement in the structure of the connecting portion that prevents the separation.

[Conventional technology]

A laser mask character mask of this kind according to the conventional example, particularly a metal laser mark character mask in this case, is shown in FIG. 3 and the laser mask character mask is used as a mark. The form of the display mark when the cut-out character is projected and displayed on the symmetrical object surface by the laser beam is shown in FIG.

That is, in the laser mark character mask shown in FIG. 3, reference numeral 11 is a mask plate made of a thin metal plate such as steel metal, stainless steel, and the like. The cut-out character 12 to be displayed as a mark is extracted and formed by a means such as photo-etching, and among the displayed cut-out characters 12, characters which are hollow, for example, "6", "8", etc. If it is a number or an alphabetic character such as “A”, “B”, “D”, “O”,
If this is cut out and formed on the mask plate 11 in the same manner, the plate surface portion 11a left inside is cut off from the mask plate 11 surface, and therefore, the cutouts that are to be hollowed out. A plate surface portion 11a left inside the character 12 is joined to the surface of the mask plate 11 and a connecting portion 13 for preventing the separation is attached.

Therefore, as shown in FIG. 4, by using this laser mark character mask, the cut-out character 12 which is the inside thereof is irradiated with a laser beam to produce a symmetrical object surface, for example, a display surface of a semiconductor device or the like. The shape of the mark 14 projected onto the mask plate 11 is the portion corresponding to the connecting portion 13 where the plate surface portion 11a left inside the cutout character 12 is joined to the mask plate 11 surface. 15 is a display in a mode that is cut off from the display surface.

[Problems to be solved by the invention]

As described above, in the conventional metal laser mark character mask, when the cutout character 12 is hollow, the plate surface portion 11a left inside is connected to the mask plate 11 surface to prevent separation. Since 13 is formed, the mark 14 that is displayed on the symmetrical object surface by the irradiation of the laser beam also has a chipped portion 15 with no display corresponding to the same connection portion 13, and is not hollow. Compared to the display of the cut-out character 12, it was very difficult to see.

Then, the connecting portion 13 for connecting the plate surface portion 11a left inside the cutout character 12 of this kind to the mask plate 11 surface.
In general, the connection width can be narrowed only to the thickness of the mask plate 11, and the connection width of the connection portion 13 is made as narrow as possible so that the chipped portion 15 of the displayed mark 14 is conspicuous as much as possible. In order to eliminate it, it is inevitable that the plate thickness of the mask plate 11 itself should be as thin as possible, but on the other hand,
In this way, reducing the thickness of the mask plate 11 not only weakens the strength of the mask plate 11 itself, but also the plate surface portion left inside the cutout character 12 that is hollowed out on the mask plate 11 surface.
In fact, it will hinder the binding of 11a.
There are problems such as being unfavorable.

The present invention has been made in order to improve such conventional problems, and an object thereof is to reduce the thickness of the mask plate as much as possible so that a portion where a mark to be displayed is missing. The object of the present invention is to provide a character mask for a laser mark of this kind, which can make the mark as inconspicuous as possible and also has sufficient strength.

[Means for solving problems]

In order to achieve the above object, the character mask for laser marks according to the present invention is formed by using a mask plate made of a thin metal plate such as steel plate gold or stainless steel, and extracting cutout characters to be displayed as marks on the mask plate. And, among the cutout characters displayed, the plate surface portion left inside the characters to be hollowed out, in the laser mark character mask in which the mask plate surface is joined at the connection portion, with respect to the mask plate, at least the above It is characterized in that a holding plate capable of transmitting a laser beam is attached and reinforced by including a plate surface portion left inside a cut-out character to be hollowed out.

[Action]

That is, in the present invention, since the mask plate made of a thin metal plate includes a plate surface portion left inside the cut-out character to be hollowed out, a holding plate that can transmit a laser beam is attached and reinforced, Even if a thinner metal plate is used as the material of this mask plate, there is no fear that the strength of the mask plate itself will be lost, and on the other hand, the mask plate thickness should be reduced in this way. As a result, it is possible to make the connecting portion on the plate surface portion left inside the cut-out character to be hollowed out as inconspicuous as possible.

〔Example〕

Hereinafter, different embodiments of the character mask for laser marks according to the present invention will be described in detail with reference to FIGS. 1 and 2.

FIG. 1 is an overall perspective view showing a schematic configuration of a laser mark character mask to which a first embodiment of the present invention is applied,
FIG. 2 is an overall perspective view showing a schematic structure of a laser mark character mask to which a second embodiment of the present invention is applied by cutting away a part thereof.

That is, also in the character masks for laser marks shown in the first and second embodiments, reference numeral 11 is a mask plate made of a thin metal plate such as steel alloy or stainless steel, which is more than that of the conventional example. Also, it is possible to use a thinner plate, and 12 is a cutout character formed by cutting out on this mask plate 11, and even here, it is a middle cutout of the displayed cutout characters 12. The cut-out character 12 has a plate surface portion 11a left on the inside, and this plate surface portion 11a
There is provided a connecting portion 13 for connecting to the mask plate 11 surface.

Therefore, in the first embodiment shown in FIG. 1, the mask plate 11 configured as described above includes a plate surface portion 11a left inside the cut-out character 12 which is a hollowed portion, and the laser beam The holding plate 16a that is made to be permeable, and this is a thick metal plate in which the observation holes 18 are hollowed out in the shape of a frame are attached and reinforced so as to be sandwiched from the front side and the back side, respectively. It is a thing.

Therefore, in the case of the first embodiment, a holding plate made of a thick metal plate is provided on both front and back surfaces of the mask plate 11 which is made relatively thin.
Since 16a is attached and reinforced, the strength of the mask plate 11 itself can be sufficiently secured, and on the other hand, since the mask plate 11 is made thin in this manner, the cutout character 12
When projected onto the display surface of the symmetrical object by irradiating a laser beam, the existence of the connecting portion 13 that joins the plate surface portion 11a left inside the cutout character 12 to the mask plate 11 surface is conspicuous as much as possible. It can be lost.

In addition, in the second embodiment shown in FIG. 2, the mask plate 11 is thick enough to include the plate surface portion 11a left inside the cutout character 12 which is the hollow, and can transmit the laser beam. The transparent holding plate 16b is attached and reinforced so as to be sandwiched from the front surface side and the back surface side, respectively.
The same action and effect as the previous example can be obtained.

In each of the first and second embodiments, the mask plate is used.
In contrast to 11, a metal plate holding plate 16a and a transparent plate holding plate 16b
Is attached from both the front surface side and the front surface side to reinforce, but it goes without saying that it may be attached to either the front surface side or the back surface side.

〔The invention's effect〕

As described above in detail, according to the present invention, a mask plate made of a thin metal plate such as a steel alloy or stainless steel is used, and the cut-out character to be displayed as a mark is formed and displayed on the mask plate. Among the cut-out characters, the plate surface part left inside the character to be hollowed out, in the character mask for laser mark constructed by connecting this to the mask plate surface at the connection part, at least the center The mask plate material, including the plate surface portion left inside the cut-out character to be cut out, is attached to reinforce the mask plate, so that the mask plate material is made even thinner. Even if you use, there is no fear that the strength of the mask plate itself will be lost, and on the other hand, by reducing the thickness of the mask plate in this way, It is possible to make the plate surface part to be made as inconspicuous as possible and to make the connection part that connects it to the mask plate surface as inconspicuous as possible. Moreover, it is relatively structurally simple and can be implemented easily and inexpensively. It has excellent features.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing a schematic structure according to a first embodiment of a laser mark character mask according to the present invention, and FIG. 2 is a partial cutaway view showing a schematic structure according to a second embodiment of the same character mask. FIG. 3 is an overall perspective view, FIG. 3 is an overall perspective view showing a schematic configuration of a conventional laser mark character mask, and FIG. 4 is the same as above, but using the character mask, cutout characters are made symmetrical with a laser beam on the object plane. It is explanatory drawing which shows the form of the display mark at the time of carrying out projection display. 11 …… Mask plate, 11a …… Plate surface part, 12 …… Cutout character, 1
3 …… Connection part, 16a …… Holding plate (metal plate), 16b …… Holding plate (transparent plate), 18 …… Window hole.

Claims (5)

(57) [Claims] 1. A mask plate made of a thin metal plate such as steel alloy or stainless steel is used, and cut-out characters to be displayed as marks on the mask plate are extracted and formed. In the character mask for the laser mark in which the plate surface portion left inside the character to be joined to the mask plate surface at the connection portion, the plate surface portion left inside the cutout character to be at least the hollow with respect to the mask plate A character mask for a laser mark, characterized in that a holding plate capable of transmitting a laser beam is attached and reinforced. 2. A laser mark character mask according to claim 1, further comprising a holding plate capable of transmitting a laser beam attached to either the front surface or the back surface of the mask plate. . 3. The character mask for laser marks according to claim 1, wherein a holding plate that can transmit a laser beam is attached to both the front surface and the back surface of the mask plate. 4. The holding plate attached to the mask plate is a thick metal plate having a frame-shaped window hole in which a laser beam can be transmitted. Character mask for laser mark according to the first, second or third range. 5. The laser according to claim 1, 2, or 3, wherein the holding plate attached to the mask plate is a transparent plate capable of transmitting a laser beam. Character mask for marks.