JP3381860B2 - Ceramic green sheet reversing jig and reversing method using the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceramic green sheet for manufacturing a multilayer electronic component such as a multilayer chip capacitor or a multilayer chip inductor, which is a magazine in which a large number of ceramic green sheets held by a carrier film are stacked. The present invention relates to a jig which is turned upside down in a state of being housed in a housing, and a method for turning the direction of the ceramic green sheet with a carrier film using the jig.

[0002]

2. Description of the Related Art A monolithic ceramic capacitor, which is the most typical example of a monolithic electronic component, has a large number of dielectric ceramic layers each having an internal electrode, and the internal electrodes are alternately drawn out to the end face of the laminated body. Then, external electrodes are formed on the end faces of the stacked body from which these internal electrodes are drawn out.

The conventional manufacturing method of such a monolithic ceramic capacitor is to form a green sheet by molding a ceramic slurry in which a dielectric ceramic powder is dispersed in an organic binder into a sheet, and by a screen printing method or the like.
An internal electrode pattern is printed on this green sheet with a conductive paste. Then, the green sheets on which the internal electrode patterns are printed are stacked in a predetermined order, and a plurality of green sheets on which the internal electrode patterns are not printed are stacked on both sides thereof. The laminate thus obtained is cut into chips so that the internal electrodes are exposed at the end faces, and the chips are fired. As a result, a sintered laminate is obtained. Then, a conductive paste is applied to the end surface of the sintered multilayer body where the internal electrodes are exposed, and this is baked to form external electrodes, whereby the multilayer chip capacitor is completed.

While many circuit components are miniaturized, such monolithic ceramic capacitors are also miniaturized,
Larger capacity is required. Against this background, it has become common practice to manufacture laminated ceramic capacitors by laminating extremely thin green sheets having a thickness of 10 μm or less. In order to manufacture such a capacitor with a high yield, it is necessary to have a technique of printing on the extremely thin green sheet with high precision and stacking it.
In this case, since the ceramic green sheet is extremely thin, it must be handled carefully so that the green sheet will not be stretched or distorted when it is transported, printed or laminated.

The ceramic green sheet is formed by coating a carrier film such as a polyethylene terephthalate film with a ceramic slurry to a constant thickness and drying. Conventionally, a thin ceramic green sheet is formed on a carrier film as described above, punched out into a predetermined size together with the carrier film, printed with an internal electrode pattern, and further laminated in sequence. However, a method of peeling the carrier film is adopted.

[0006]

However, in this method, the step of printing the internal electrodes on the ceramic green sheet is performed with the side of the ceramic green sheet facing upward, but the step of laminating is performed on the side of the ceramic green sheet. After stacking and crimping in order with the face down,
This is performed by peeling off the upper carrier film. Therefore, the ceramic green sheet with a carrier film is placed at 180 ° between the printing process and the laminating process.
It is necessary to reverse it and change its direction.

Conventionally, the reversal of the ceramic green sheet with a carrier film has been manually performed, but there is a problem that the efficiency is poor and the positional deviation easily occurs. Therefore, in view of the above-mentioned problems, the present invention provides a jig that can be reversed at a time by a simple operation in a state where a large number of ceramic green sheets with carrier films are stacked, without causing mutual displacement. It is an object to provide an inversion method using this.

[0008]

That is, according to the present invention,
In order to achieve the above-mentioned object, a pair of magazines in which a plurality of columns 12, 13, 22, and 23 are installed in parallel from the main surface of the plates 11 and 21 so as to surround the ceramic green sheet a with a carrier film to be stored. 1 and 2 of the plate bodies 11 and 12 of the magazines 1 and 2, respectively, at positions corresponding to the columns 22, 23, 12, 13 of the other magazine 2, 1 respectively. There is provided a ceramic green sheet reversing jig having through holes 15, 14, 25, 24 capable of fitting with.

Furthermore, a method of stacking a plurality of ceramic green sheets a with a carrier film, in which a ceramic green sheet is formed on a carrier film, and storing them in a magazine, and turning them upside down, is a method for inverting the plates 11, 21. A plurality of support columns 12 surrounding the ceramic green sheet a with a carrier film to be stored from the main surface of
A pair of magazines 1, 2 in which 13, 22, 23 are erected in parallel, and plate bodies 11, 1 of these magazines 1, 2 are provided.
2 each of the other magazines 2, 1 columns 22, 23, 1
At the positions corresponding to 2, 13, the columns 22, 23, 1
Prepare magazines 1 and 2 having through holes 15, 14, 25 and 24 into which 2 and 13 can be fitted, and a plurality of ceramic greens with a carrier film between columns 12 and 13 of one magazine 1. The sheets a are stacked and accommodated, and the columns 12, 13, 22, and 23 of the magazines 1 and 2 are fitted into the through holes 25, 24, 15, and 14 of the other magazine 2 and 1, respectively, so that the plate 11 , 12, a ceramic green sheet a with a carrier film is sandwiched, and the magazines 1, 2 are turned upside down in this state, and then the columns 12, 13, 22, 23 of the respective magazines 1, 2 are attached to the other magazine 2, A ceramic green sheet reversing method is provided in which the magazines 1 and 2 are separated from each other by pulling out from the through holes 25, 24, 15 and 14 of 1.

[0010]

By using the jig according to the present invention, a plurality of ceramic green sheets a with carrier films are stacked and stored between the columns 12 and 13 of one magazine 1, and the magazines 1 and 2 of each magazine are stored. Columns 12, 1
3, 22, 23 through holes 25, 2 of the other magazine 2, 1
The ceramic green sheet a with a carrier film can be sandwiched between the plate bodies 11 and 12 by fitting the ceramic green sheets a to the plate bodies 11 and 12. Therefore, in this state, magazine 1,
(2) By turning upside down, a plurality of ceramic green sheets with a carrier film a can be turned upside down without shifting. After that, the columns 12, 13, 22, 23 of each magazine 1, 2 can be separated from each other by pulling out the columns 12, 13, 22, 23 from the through holes 25, 24, 15, 14 of the other magazine 2, 1. The thus-stacked ceramic green sheets a with carrier films are stored in the other magazine 2 and the reversal is completed while being held between the columns 22 and 23.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIGS.
The ceramic green sheet reversing jig according to the present invention has a pair of magazines 1 and 2. These magazines 1,
2 are columns 12, 1 near the four sides of the main surface of a rectangular plate body 11, 12 having a plane size slightly larger than the ceramic green sheet a with a carrier film to be stored.
3, 22, and 23 are projected in parallel, and the through holes 14 and 1
5, 24 and 25 are perforated.

As shown in FIGS. 1 and 3 (a), in the first magazine 1, one support column 12 is provided at the center of the plate body 11 slightly inside the pair of opposing sides. 12 is provided in a protruding manner, and through holes 15, 15 are bored on both sides thereof.
In addition, two support columns 13 and 13 are provided so as to project slightly inward from the sides of the other set of the plate body 11 that face each other, and through holes 14 and 14 are bored therebetween. These opposing columns 1
The intervals of 2, 12 and 13, 13 correspond to the intervals of the opposing sides of the ceramic green sheet a with a carrier film to be stored, that is, the width and the length.

On the other hand, as shown in FIGS. 1 and 3 (b), in the second magazine 2, two columns 22 are provided inside each of a pair of opposing sides of the plate 11. Are projected, and through holes 25, 25 are bored therebetween. Further, one column 23, 23 is provided in a protruding manner at a central portion slightly inside the side of the other pair of the plate body 11 facing each other, and through holes 14, 14 are formed on both sides thereof. The interval between these opposing columns 12, 12 and 13, 13 also corresponds to the width and length of the ceramic green sheet a with a carrier film to be stored.

The columns 12, 1 of these magazines 1, 2
The diameters of 3, 22, and 23 are the same, and the through holes 14 and 1
The diameters of 5, 24 and 25 are slightly larger than the diameters of these columns. Further, the columns 12 and 13 on the first magazine 1 side correspond to the positions of the through holes 25 and 24 of the second magazine 2, respectively, and the columns 22 and 23 on the second magazine side also It corresponds to the positions of the through holes 15 and 14 of the magazine 1.

Next, a method of reversing the vertical direction of a stack of a plurality of ceramic green sheets a with carrier films by using a jig composed of these two magazines 1 and 2 will be described. As shown in FIG. 2A and FIG. 3A, a plurality of green sheets a with carrier films are stacked in the first magazine 1
It is held between the columns 12, 13. Normally, in this state, the green sheet a with a carrier film is stored in the magazine 1 with the green sheet side facing up.

From this state, the columns 2 of the second magazine 2
The same magazine 2 is superposed on the magazine 1 with 2, 23 facing downward, and the columns 12, 13 of the first magazine 1 are inserted into the through holes 25, 24 of the second magazine 2 and the columns 22, 22 of the second magazine 2. 23 are inserted into the through holes 15 and 14 of the first magazine 1, respectively, and as shown in FIG.
A ceramic green sheet a with a carrier film is sandwiched between Nos. 1 and 21.

Next, as shown in FIG. 2 (c), the magazines 1 and 2 combined as described above are reversed by 180 ° and the top and bottom thereof are reversed. Then, as shown in FIG. 2D, when the first magazine 1 is separated from the second magazine 2 to the upper side, the green sheet a with the carrier film placed on the plate body 21 of the magazine 2 is Stanchions 22, 23
It remains in the magazine 2 in a state of being held surrounded by. A plan view of this state is shown in FIG. The green sheet with carrier film stored in this magazine 2
The top and bottom of the magazine 1 are reversed, and the carrier film is stored so as to face upward. This completes the reversal of the green sheet a with the carrier film.

In the above embodiment, the magazines 1, 2 are
Both have six columns, but the columns are erected in parallel so as to surround the green sheet a with the carrier film in the four sides so as not to move, and with the magazines 1 and 2, If the arrangement of the columns is different, the number and arrangement thereof are arbitrary. Each magazine 1,
It goes without saying that the second plate body has through-holes corresponding to the positions of the supporting columns on the other side, into which the supporting columns can be inserted.

[0019]

As described above, according to the present invention, a large number of ceramic green sheets with carrier films can be reversed at a time by a simple operation without causing mutual displacement of the sheets. Therefore, efficient and highly accurate reversal is possible.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a ceramic green sheet reversing jig according to an embodiment of the present invention.

FIG. 2 is a side view showing a procedure for reversing a green sheet with a carrier film using the ceramic green sheet reversing jig.

FIG. 3 is a view (a) taken along the line AA of FIG. 2 (a) and FIG.
It is a BB line arrow view (b) of (d).

[Explanation of symbols]

1 magazine 2 magazines 11 plate 12 props 13 props 14 through holes 15 through holes 21 plate 22 props 23 props 24 through holes 25 through holes a Ceramic green sheet with carrier film

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-63-99150 (JP, A) JP-A-61-140445 (JP, A) Actual flat 4-105017 (JP, U) Actual flat 2- 4837 (JP, U) S. 44-14507 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B28B 13/06 B65G 47/248 H01G 4/30 311

Claims (2)

(57) [Reference number] 0040883-01 [Claims] 1. A plurality of columns (12), (13), (2) surrounding the ceramic green sheet (a) with a carrier film to be housed from the main surfaces of the plate bodies (11), (21).
2), a pair of magazines (1) and (2) in which (23) are erected in parallel are provided, and these magazines (1) and (2)
The plates (11) and (12) of the other magazines (2) and (1) columns (22), (23) and (12), respectively.
At the position corresponding to (13), the columns (22), (2
3), (12) and (13) can be fitted with through holes (15),
A ceramic green sheet reversing jig having (14), (25) and (24). 2. A method of turning upside down a plurality of ceramic green sheets (a) with a carrier film, in which a ceramic green sheet is formed on a carrier film, stacked in a magazine, and turned upside down. A plurality of columns (12), (13), (22) and (23) are erected in parallel from the main surfaces of (11) and (21) so as to surround the ceramic green sheet (a) with a carrier film to be stored. A pair of magazines (1) and (2), which are plate bodies (11) of these magazines (1) and (2),
The columns (22), (23), (12) are located at positions corresponding to the columns (22), (23), (12), (13) of the other magazine (2), (1) of (12). ), (1
3) through holes (15), (14), (25),
Prepare magazines (1) and (2) having (24), and place a plurality of ceramic green sheets (a) with a carrier film between columns (12) and (13) of one magazine (1). Are stored in a stack, and the columns (12), (13), (22) of the magazines (1) and (2) are stored.
(23) through the other magazines (2), (1) through holes (2
5), (24), (15) and (14) are fitted to hold the ceramic green sheet (a) with a carrier film between the plate bodies (11) and (12), and in this state the magazine After flipping (1) and (2) upside down, the columns (12), (13) and (2) of the magazines (1) and (2), respectively.
2) and (23) are removed from the through holes (25), (24), (15) and (14) of the other magazine (2) and (1) to remove these magazines (1) and (2). A method for reversing a ceramic green sheet, characterized in that they are separated from each other.