JP3489445B2 - Laminated body manufacturing method and laminated body manufacturing apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a laminated body, and more particularly to a method for manufacturing a laminated body by stacking green sheets supported by a carrier film and a manufacturing apparatus used therefor.

[0002]

2. Description of the Related Art A monolithic ceramic capacitor, which is one of typical monolithic electronic components, usually has a green sheet (ceramic green sheet) and a conductive paste serving as an internal electrode formed in a predetermined pattern. A predetermined number of printed electrode-printed sheets and green sheets (cover sheets) on which no conductive paste is printed are laminated and pressure-bonded to form a laminated pressure-bonded body, which is cut at a predetermined position. After cutting out each ceramic element and firing it, conductive paste is applied to both ends including the end surface of the ceramic element and baked,
It is manufactured by forming an external electrode that is electrically connected to the internal electrode.

By the way, a green sheet used for manufacturing such a laminated electronic component has a small mechanical strength,
Although careful handling is required, in recent years, as the demand for miniaturization of electronic components has increased, extremely thin green sheets having even lower mechanical strength have been used. Therefore, various methods have been proposed and implemented in which the green sheet is handled while being supported by a carrier film so that the green sheet is not damaged during handling.

As a method for manufacturing a laminated body by laminating and pressing the green sheets supported on the carrier film, for example, as shown in FIG. 6, one surface of the carrier film 51 (the lower surface in FIG. 6). After the green sheet (sheets to be laminated) 52a supported on the table 53 is positioned above the table 53, as shown in FIG.
By pressing and lowering the laminated sheet 52
After a is pressure-bonded to the upper surface of the table 53 or the green sheet 52b on the table 53, the carrier film 51 is lifted up to raise the laminated sheet 5 as shown in FIG.
Peel off from 2a, stack the next laminated sheet again,
The laminate is manufactured by pressure bonding.

However, in the above-mentioned conventional method, the laminated sheet 52a is pressed by the press head 54a having a flat lower surface.
Since the green sheet 52b is pressed and pressure-bonded via the carrier film 51, air sometimes enters between the laminated sheet 52a and the green sheet 52b, and the laminated sheet 52a and the green sheet 52b.
There is a problem in that even after pressure bonding, it remains between layers, causing delamination and poor adhesion.

Therefore, in order to prevent air from entering between the laminated sheet 52a and the green sheet 52b, for example, a method of manufacturing a laminated body as shown in FIG. 9 has been proposed. That is, in this method, the green sheet (sheets to be laminated) 52 a supported on one surface (lower surface in FIG. 9) of the carrier film 51 is placed on the table 53,
Stacked on the upper surface side of the green sheet 52b, the roller 54
The laminated sheet 5 through the carrier film 51.
While pressing the 2a against the green sheet 52b, the roller 54 is moved in a substantially horizontal direction (the direction of arrow A) to expel the air between the laminated sheets 52a and the green sheet 52b without causing air to enter between the sheets. The laminated sheet 52a is to be pressure-bonded to the green sheet 52b, and then the carrier film 51 is peeled off and moved in a predetermined direction (the direction of arrow B in this example) to stack the next laminated sheet. This intends to form a laminated body. In this method,
In some cases, the laminate formed by pressing the green sheet with a roller is finally pressed again.

However, in the case of this method, it is possible to prevent air from entering between the green sheets forming the laminated body, but the roller 54 and the carrier film 51 are prevented.
In the state of being pressed against, the pressure is applied while moving in the direction orthogonal to the stacking direction of the laminated sheets 52a (moving in the direction of arrow A) (that is, by removing the air by moving the roller 54). Instead, the laminated sheet 52a is transferred to the green sheet 5 by the roller 54.
It is necessary to press the roller 54 against the carrier film 51 comparatively strongly, because the roller 54 is pressed against the carrier film 51. Therefore, there arises a problem that stacking deviation of the green sheets occurs due to this, and desired electrical characteristics cannot be obtained.

The present invention solves the above problems and prevents air from entering between the green sheets forming the laminate and remaining in the laminate without causing stacking of the green sheets. However, it is an object of the present invention to provide a laminated body manufacturing method and a laminated body manufacturing apparatus capable of efficiently manufacturing a highly reliable laminated body having desired characteristics without delamination or poor adhesion. To do.

[0009]

In order to achieve the above object, the method for producing a laminate of the present invention (claim 1) is a method for producing a laminate by stacking green sheets supported by a carrier film. , Green sheet supported on one side of carrier film (laminated sheet)
A該被laminated sheet is laminated, a step to position to the green sheet and the facing to be crimped, the primary press (pre-press) means for pressing the object to be laminated sheet on the green sheet through the carrier film, displacement pile Raw
It is almost horizontal while pressing it against the carrier film so that it does not twist
It is moved in a direction, while expelling air between the stacked sheets and green sheets, a primary press preliminarily crimp the the stacked sheet on the green sheet (pre-press) process, vertical
By lowering the secondary pressing means operating in the straight direction,
Ri, the primary press (pre-press) the stacked sheet formed in the step and the preliminary pressure-bonded body of the green sheets, and less up through the carrier film, the secondary pressing step for crimping the stacked sheet on the green sheet , In the secondary pressing process
It includes a peeling step of peeling away the carrier film from the laminated sheet that is pressed against the green sheet, a, and the product
The primary press (preliminary press) work for each layer sheet
After performing the secondary pressing step and the peeling step,
It is characterized by forming a layered body .

A method for manufacturing a laminated body according to the present invention (claim 1)
In the primary pressing (preliminary pressing) step, the primary pressing (preliminary pressing) means is moved in a substantially horizontal direction while being pressed against the carrier film to the extent that stacking does not occur, and the air between the laminated sheet and the green sheet is removed. While kicking out
After pre-pressing the laminated sheet to the green sheet,
Secondary pressing means that operates vertically in the secondary pressing process
By lowering the preliminary compression of the stacked sheets and green sheets, and less up through the carrier film, after crimping the stacked sheet on the green sheet, peeling off the carrier film from the laminated sheet is crimped I will do it
The primary press for each layer of laminated sheets
Performs (preliminary pressing) process, secondary pressing process and peeling process
Since it is applied to form a laminated body, it does not cause stacking of the green sheets, prevents air from entering between the sheets, has no delamination or adhesion failure, and has desired characteristics. A highly reliable laminated body can be efficiently manufactured. That is, in the preliminary pressing step, the purpose is to preliminarily crimp while expelling the air between them,
Since it is not necessary to press so strongly as to cause stacking by the primary pressing (preliminary pressing) means, it is possible to prevent the stacking from occurring in the pressing process by the roller that occurs in the conventional method, and to perform the secondary pressing after that. By pressing, the respective sheets are reliably pressure-bonded, and it is possible to obtain a highly reliable laminated body having desired characteristics without delamination or defective adhesion.

Further, in the method for manufacturing a laminated body according to a second aspect, the primary pressing (preliminary pressing) means used in the primary pressing (preliminary pressing) step moves the carrier film in a predetermined direction while rotating. It is characterized by being a roller that can.

As the primary pressing means used in the primary pressing step, by using a roller capable of moving in a predetermined direction on the carrier film while rotating, the primary pressing means is smoothly moved while being pressed against the carrier film. The air between the laminated sheet and the green sheet can be efficiently expelled without causing stacking, and the present invention can be more effectively realized.

The method for manufacturing a laminated body according to a third aspect of the present invention is such that a predetermined number of green sheets are laminated and pressure-bonded, and then the whole is pressed to finally pressure-bond each green sheet. It is characterized in that it is equipped with a third pressing process.

[0014] stacking the green sheets of Jo Tokoro number, after crimping, if you choose to press the entire Finally, it is possible to further improve the adhesion of the sheet,
It becomes possible to obtain a highly reliable laminated body.

A laminated body manufacturing apparatus of the present invention (Claim 4) is a laminated body manufacturing apparatus used for carrying out the laminated body manufacturing method according to Claim 1, 2, or 3, the used in the primary press (pre-press) process, product
By moving in a substantially horizontal direction while being pressed against the carrier film to the extent that misregistration does not occur, the laminated sheet is pressed against the green sheet via the carrier film, and air between the laminated sheet and the green sheet is removed. A primary press (preliminary press) means for preliminarily press-bonding the laminated sheet to the green sheet while ejecting, and a vertical press used in the secondary pressing step .
By performing a secondary pressing of the pre-pressed body of the laminated sheet and the green sheet formed in the primary pressing step through a carrier film, a secondary pressing means for press-bonding the laminated sheet to the green sheet, and It is characterized by having.

As described above, the laminated body manufacturing apparatus of the present invention (Claim 4) is such that the carrier does not become unstacked.
It can move in a substantially horizontal direction while being pressed against the film.
By doing so, the laminated sheet is guided through the carrier film.
By pressing it against the lean sheet, the laminated sheet and the green sheet
Glee the laminated sheet while expelling the air between the sheets.
Primary press (preliminary press) for preliminarily crimping the sheet
By means of vertical movement by means of
Pressure of laminated sheet and green sheet formed by
Secondary pressing the body through the carrier film
According to the present invention, the laminated sheet is provided with a secondary pressing means for press- bonding the laminated sheet to the green sheet, the method for producing a laminated body of the present invention is efficiently carried out, and there is no delamination or adhesion failure, and desired characteristics are obtained. It is possible to efficiently manufacture a highly reliable laminated body having the above.

Further, in the apparatus for manufacturing a laminated body according to a fifth aspect, the primary pressing (preliminary pressing) means used in the primary pressing (preliminary pressing) step moves the carrier film in a predetermined direction while rotating. It is characterized by being a roller that can.

As a primary pressing means used in the primary pressing step, by using a roller capable of moving in a predetermined direction on the carrier film while rotating, the primary pressing means is smoothly moved while being pressed against the carrier film. The air between the laminated sheet and the green sheet can be efficiently expelled without causing stacking, and the present invention can be more effectively realized.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The features of the present invention will be described below in more detail with reference to the embodiments of the present invention.
In addition, in this embodiment, an apparatus for manufacturing a laminated body by laminating and press-bonding green sheets (sheets to be laminated) supported on the lower surface side of the carrier film will be described as an example.

FIG. 1 is a diagram showing a schematic structure of a laminated body manufacturing apparatus used in this embodiment. As shown in FIG. 1 to FIG. 5, the laminated body manufacturing apparatus of this embodiment has a carrier film 1 supporting a green sheet (sheet to be laminated) 2a.
Is conveyed, and the green sheet (sheets to be laminated) 2a supported on the lower surface side thereof is placed on the table (pressure receiving plate) 3,
That is, the carrier rollers 20a and 20b positioned so as to face the green sheet 2b on the table 3 and the carrier film 1 used in the primary pressing (preliminary pressing) step.
The roller 4 which is a primary press (preliminary press) means for pressing the laminated sheet 2a against the green sheet 2b through the carrier film 1 by moving the upper surface side while being pressed against The green sheet preliminary press-bonded body 23 (FIG. 5) is provided with a press head 14 which is a secondary pressing means for secondary pressing through the carrier film 1.

The roller 4 as the primary pressing means is
It is constructed so that it can be operated in a predetermined direction by a driving means (not shown), and the press head 14 which is a secondary pressing means is constructed so that it can be moved up and down by a driving means (not shown). ing.

Next, a method of manufacturing a laminated body using the above laminated body manufacturing apparatus will be described. 1 to 5 are
It is a figure which shows typically each process of the manufacturing method of the laminated body of this embodiment.

In this embodiment, as shown in FIGS. 1 to 5, a green sheet (sheets to be laminated) 2a supported on the lower surface side of the carrier film 1 is laminated on the green sheet 2b on the table 3 by pressure bonding. A case where the laminated body is manufactured by using the above will be described as an example.

(1) First, as shown in FIG. 1, the green sheet (sheets to be laminated) 2a supported on the lower surface of the carrier film 1 is positioned above the green sheet 2b on the table 3.

(2) Then, as shown in FIG. 2, the roller 4 is lowered to bring the end of the laminated sheet 2a supported on the lower surface of the carrier film 1 into contact with the end of the upper surface of the green sheet 2b. Let

(3) Then, as shown in FIG. 3, while pressing the roller 4 against the carrier film 1, the roller 4 is gradually moved in the direction of arrow A (substantially horizontal direction), and finally, as shown in FIG.
As shown in, the roller 4 is moved to the opposite end of the laminated sheet 2a to perform the primary pressing (preliminary pressing). In this primary pressing process, the roller 4
In the process of moving in the direction of arrow A, air is expelled from between the laminated sheet 2a and the green sheet 2b, and the lower surface of the laminated sheet 2a adheres to the upper surface of the green sheet 2b. As a result, the laminated sheet 2a and the green sheet 2b
It is possible to reliably prevent air from remaining during the period.

(4) Then, in this state, as shown in FIG. 5, the press head 14 is lowered to remove the carrier film 1.
From above, the pre-pressed body 23 of the laminated sheet 2a and the green sheet on the table 3 is pressed (secondary press),
The laminated sheet 2a is pressure bonded to the green sheet 2b.

(5) Then, the press head 14 is raised to separate the carrier film 1 from the upper surface of the laminated sheet 2a, and then the carrier film 1 is moved to the state shown in FIG. By repeating the operation of
A predetermined number of green sheets are laminated to form a laminate.

(6) Then, the laminated body formed in (5) is finally pressed (tertiary press) to obtain a laminated body in which the respective sheets are firmly adhered. This tertiary pressing can be easily performed by using the press head 14 which is the secondary pressing means, but may be performed by using other known pressing means.

In the above embodiment, the case where the roller 4 is moved in the direction of the arrow A to perform the preliminary pressing has been described. However, the roller 4 is moved to the opposite side for each laminated sheet 2a. It is also possible to shorten the moving distance of the roller 4 and efficiently perform the preliminary pressing.

Further, in the above embodiment, the case where the roller is used as the primary pressing (preliminary pressing) means has been described. It is also possible to use a bar-shaped pressing member as the primary pressing means and slide them while pressing them against the carrier film. Further, in the above embodiment, the case where the laminated sheets 2a supported by the carrier film 1 are stacked on the green sheet 2b has been described, but it goes without saying that the laminated sheets 2a may be directly pressure-bonded to the table. That is, all the laminated sheets that form the laminated body may be stacked in the same manner.

In the above embodiment, the case where only the green sheets are repeatedly laminated and pressure-bonded has been described as an example. However, after laminating and pressure-bonding one green sheet, an electrode is printed on the surface thereof. The method and apparatus of the present invention can be applied to the case where the green sheets are laminated and pressed again after that. Further, it goes without saying that the present invention can be applied to a case where green sheets having arbitrary electrodes are laminated and pressure-bonded.

The invention of the present application is not limited to the above-mentioned embodiment in other points as well, and various applications and modifications are possible within the scope of the gist of the invention with respect to a specific structure of the secondary pressing means. It is possible to add.

[0034]

As described above, in the method for manufacturing a laminated body of the present invention (claim 1), stacking occurs in the primary pressing (preliminary pressing) means in the primary pressing (preliminary pressing) step.
Substantially horizontal direction while pressing the carrier film to an extent not
It moved countercurrently, while expelling air between the stacked sheets and green sheets, after preliminarily crimp the the stacked sheets in the green sheet, the secondary pressing process, the operation in the vertical direction
By lowering the secondary pressing means, the pre-pressed body of the laminated sheet and the green sheet is pressed through the carrier film, and the laminated sheet is pressure-bonded to the green sheet. film has to be peeled off, the stacked sheets each layer
First press (preliminary press) process, secondary press process and
And a peeling process are performed to form a laminated body.
Therefore, it does not cause stacking of the green sheets, prevents air from entering between the sheets, has no delamination or adhesion failure, and efficiently manufactures a highly reliable laminated body having desired characteristics. Will be able to. That is, in the preliminary pressing step, since the purpose is to preliminarily crimp while expelling the air between the two, it is not necessary to press so strongly that the primary pressing (preliminary pressing) means causes stacking. It is possible to prevent stacking from occurring in the pressing process by the roller that occurs in the conventional method, and the subsequent secondary pressing ensures that each sheet is pressed firmly, resulting in delamination, defective adhesion, etc. It is possible to obtain a highly reliable laminated body having desired characteristics.

Further, as in the method for manufacturing a laminated body according to claim 2, as the primary pressing means used in the primary pressing step, a roller capable of moving in a predetermined direction on the carrier film while being rotated is used. This makes it possible to move the primary pressing means smoothly while pressing it against the carrier film, and efficiently expel the air between the laminated sheet and the green sheet without causing stacking error, which makes the present invention more effective. be able to.

Further, as in the method for producing a laminate according to claim 3, the green sheet of Jo Tokoro number laminate, after bonding,
When the whole is finally pressed, the adhesion of each sheet can be further improved, and a highly reliable laminated body can be obtained.

Further, as described above, the laminated body manufacturing apparatus of the present invention (Claim 4) has a key to such an extent that stacking does not occur.
Moves in a substantially horizontal direction while being pressed against the carrier film
By using the carrier film,
The green sheet against the laminated sheet and the green sheet.
While removing the air between the stack sheets ,
The primary press (preliminary press) means for preliminarily crimping to the green sheet and the primary press by operating in the vertical direction.
Of the laminated sheet and green sheet formed in the
Secondary press the pre-bonded body through the carrier film.
By pressing the laminated sheet to the green sheet
Since the secondary press means is provided, it is possible to efficiently carry out the method for producing a laminate of the present invention, and to produce a highly reliable laminate without delamination or defective adhesion. become.

Further, as in the apparatus for manufacturing a laminated body according to claim 5, as the primary pressing means used in the primary pressing step, a roller capable of moving in a predetermined direction on the carrier film while being rotated is used. This makes it possible to move the primary pressing means smoothly while pressing it against the carrier film, and efficiently expel the air between the laminated sheet and the green sheet without causing stacking error, which makes the present invention more effective. be able to.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a manufacturing apparatus used for carrying out a method for manufacturing a laminated body according to an embodiment of the present invention.

FIG. 2 is a diagram showing a primary pressing (preliminary pressing) step of the method for manufacturing a laminate according to the embodiment of the present invention.

FIG. 3 is a diagram showing a primary pressing (preliminary pressing) step of the method for manufacturing a laminate according to the embodiment of the present invention.

FIG. 4 is a diagram showing a primary pressing (preliminary pressing) step of the method for manufacturing a laminate according to the embodiment of the present invention.

FIG. 5 is a diagram showing a secondary pressing (preliminary pressing) step of the method for manufacturing a laminate according to the embodiment of the present invention.

FIG. 6 is a diagram showing one step of a conventional method for manufacturing a laminated body.

FIG. 7 is a diagram showing another step of the conventional method for manufacturing a laminated body.

FIG. 8 is a diagram showing still another step of the conventional method for manufacturing a laminated body.

FIG. 9 is a diagram showing another example of a conventional method for manufacturing a laminated body.

[Explanation of symbols]

1 carrier film 2a Green sheet (laminated sheet) 2b green sheet 3 table (pressure plate) 4 rollers (primary pressing means) 14 Press head (secondary press means) 20a, 20b transport rollers 23 Pre-bonded body

Claims (5)

(57) [Claims] 1. A method for producing a laminate by stacking green sheets supported on a carrier film, comprising: laminating a green sheet (a laminated sheet) supported on one surface of a carrier film, A step of positioning so as to face the green sheet to be pressure-bonded, and a primary press (preliminary press) means for pressing the laminated sheet against the green sheet via the carrier film ,
The degree of stacking deviation is not caused to move in a substantially horizontal direction while pressed against the carrier film while expelling air between the stacked sheets and green sheets, primary press preliminarily crimp the the stacked sheet on the green sheet (prepress ) Step and lowering the secondary pressing means operating vertically
More, the primary press (pre-press) the stacked sheet formed in the step and the preliminary pressure-bonded body of the green sheets, and less up through the carrier film, the secondary pressing step for crimping the stacked sheet on the green sheet , The laminated sheet that is pressure-bonded to the green sheet in the secondary pressing process
Includes a peeling step of peeling away the carrier film from over preparative, a, and, for each the stacked sheets one layer, said primary press (pre-pre
Process), the secondary pressing process, and the peeling process
A method of manufacturing a laminated body, comprising: 2. The primary pressing (preliminary pressing) means used in the primary pressing (preliminary pressing) step is a roller capable of moving in a predetermined direction on a carrier film while rotating. The method for manufacturing a laminate according to claim 1. 3. A stacking the green sheets of Jo Tokoro number, the claims after crimping, characterized in that it comprises a final press (tertiary Press) a step of bonding the green sheets across and pressed finally 1. The method for producing a laminate according to 1 or 2. 4. A manufacturing apparatus of a laminated body used for carrying out the method according to claim 1, 2 or 3 laminate, wherein used in the primary press (pre-press) process, loading not
By moving in a substantially horizontal direction while being pressed against the carrier film to the extent that this does not occur, the laminated sheet is pressed against the green sheet via the carrier film, and the air between the laminated sheet and the green sheet is expelled. Meanwhile, a primary press (preliminary press) means for preliminarily press-bonding the laminated sheet to the green sheet, and a vertical press used in the secondary pressing step .
The secondary press means for press-bonding the laminated sheet to the green sheet by secondary pressing the pre-pressed body of the laminated sheet and the green sheet formed in the primary pressing step via the carrier film. An apparatus for manufacturing a laminated body, comprising: 5. The primary pressing (preliminary pressing) means used in the primary pressing (preliminary pressing) step is a roller capable of moving in a predetermined direction on a carrier film while rotating. The manufacturing apparatus of the laminated body according to claim 4.