JPH06255880A - Method and device for separating carrier film of ceramic green sheet - Google Patents

Abstract

PURPOSE:To surely separate a carrier film from a ceramic green sheet in the uppermost position without generating layer separation of the sheets in a condition that the ceramic green sheets with the carrier film are laminated. CONSTITUTION:A negative pressure is generated in a flat sucker surface 3 along the lengthwise direction of a circumferential surface of a drum 2, and since here, an end edge part of a carrier film (c) on a ceramic green sheet (d) is sucked, the end edge part of the carrier film (c) can be surely sucked. By rotating the drum 2 rolled while moved toward the other end edge part of the carrier film (c), in a condition that the ceramic green sheet (d) is retained from above by a peripheral surface of the drum 2, the carrier film (c) sucked to the sucker surface 3 is separated from the ceramic green sheet (d) from the one end edge part toward the other end edge part.

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 produced by holding a carrier film in a state of being held by the carrier film. A method and apparatus for peeling.

[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.

Conventionally, when peeling a carrier film from a ceramic green sheet, a suction cup is sucked onto a portion of the surface of the carrier film close to the edge, and the edge of the carrier film is stripped from the ceramic green sheet by this suction cup, and then the other A method of peeling the entire carrier film from the ceramic green sheet toward the edge was taken.

[0007]

However, in the case of such carrier film peeling means, the upper ceramic green sheet is easily peeled off from the lower ceramic green sheet together with the carrier film. Therefore, there is a problem in that air enters between the ceramic green sheets temporarily bent and the laminated ceramic green sheets are displaced.

In view of the above problems, therefore, the present invention reliably peels a carrier film from the uppermost ceramic green sheet without causing interlayer peeling between the laminated ceramic green sheets with a carrier film. It is an object of the present invention to provide a carrier film peeling method and device that enable the above.

[0009]

That is, according to the present invention,
In order to achieve the above-mentioned object, in a method of peeling a carrier film c on the upper side of a ceramic green sheet a with a carrier film mounted on a laminating stand 6 from a ceramic green sheet d, a part of the carrier film c along the longitudinal direction of the circumferential surface is used. A drum 2 having a flat suction surface 3 is used, and the flat suction surface 3 of the drum 2 is used as a negative pressure to suck the edge portion of the carrier film c on the ceramic green sheet d, and then the drum 2 is moved. Provided is a method of peeling a carrier film of a ceramic green sheet, which is characterized in that the carrier film c is moved toward the other edge portion and rolled.

Further, in an apparatus for peeling the carrier film c on the upper side of the ceramic green sheet a with a carrier film on the stacking base 6 from the ceramic green sheet d, a part of it becomes flat along the longitudinal direction of the circumferential surface. And a rotary drive mechanism for rotating the drum 2 and a linear drive mechanism for moving the drum 2 in the radial direction at the same speed as the peripheral speed. Provided is a carrier film peeling device for a ceramic green sheet, which is provided with a mechanism for moving the drum 2 up and down.

[0011]

In the method for peeling a carrier film of a ceramic green sheet according to the present invention, a negative pressure is applied to the flat suction surface 3 formed along the longitudinal direction of the circumferential surface of the drum 2, and the ceramic green sheet d is placed on the suction surface. Since the edge portion of the carrier film c is adsorbed, the carrier film c
It is possible to reliably adsorb the edge portion of the. Then, the drum 2 is moved toward the other edge of the carrier film c and is rolled and rotated, so that the ceramic green sheet d is pressed from above by the peripheral surface of the drum 2 and is attached to the suction surface 3. Adsorbed carrier film c
Can be peeled off from the ceramic green sheet d from one edge thereof to the other edge thereof. As a result, only the carrier film c can be reliably peeled off while preventing interlayer peeling of the ceramic green sheet c.

In the ceramic green sheet carrier film peeling apparatus according to the present invention, a rotary drive mechanism for rotating the drum 2 having the suction surface 3 and a linear drive mechanism for moving the drum 2 in the radial direction at the same speed as the peripheral speed thereof. As a result, the peeling operation can be reliably performed. Also,
With the mechanism for moving the drum 2 up and down, it is possible to cope with a change in the laminated thickness of the ceramic green sheets d.

[0013]

Embodiments of the present invention will now be described in detail with reference to FIGS. 1 and 2. As shown in these drawings, a guide rail 4 is installed on a stacking base 6 on which the ceramic green sheets d are stacked, and a slider 1 is attached movably along the guide rail 4. This slider 1 is driven by the linear drive motor 9 shown in FIG.
It travels along the guide rails 4.

A vertical movement mechanism 7 composed of an air cylinder is attached to the slider 1, and a bearing 8 is suspended from the slider 1 via the vertical movement mechanism 7.
A drum 2 is rotatably supported on the bearing 8, and the drum 2 is rotated by a motor 10.
Motor 10 for rotating this drum 2 and slider 1
The linear drive motor 9 for moving the drum 2
The peripheral speed and the speed of the slider 1 are controlled to be equal to each other.

The outer peripheral surface of the drum 2 is a cylindrical surface as a whole, but a part of it is a flat surface including the tangent to the cylindrical surface portion of the outer peripheral of the drum, and this flat surface serves as the suction surface 3. There is. The suction surface 3 is made to have a negative pressure or can release the negative pressure by a vacuum pipe line (not shown). As a result, the carrier film c of the ceramic green sheet a with a carrier film can be adsorbed to the adsorption surface 3 or the adsorption can be released.

Further, in the apparatus shown in the figure, a gloss sensor 5 for detecting the reflected light of the ceramic green sheet d placed on the laminating table 6 or the carrier film c on the surface thereof is provided. In the illustrated embodiment, only one side of the drum 2 is rotatably supported by the bearing 8. However, it is also possible to erected two guide rails 4 in parallel so that the drum 2 is rotatably supported from both ends thereof. Is.

Next, the method of peeling the carrier film according to the present invention using this apparatus will be described. Stacking stand 6
Above, the ceramic green sheets a with a carrier film are sequentially stacked at a position different from that shown in the figure, and after temporary pressure bonding, the stacking table 6 is moved to the position shown in the figure, where the carrier film c is peeled off. It FIG. 1 shows a state in which the carrier film c is peeled from the uppermost ceramic green sheet d.

First, with the flat suction surface 3 facing downward, the slider 1 is moved so that the suction surface 3 is located right above the edge of the carrier film c, and the vertical movement mechanism 7 is moved.
As a result, the drum 2 is lowered. As a result, FIG.
As shown by, the flat suction surface 3 abuts on the edge of the carrier film c. Here, the suction surface 3 is made to have a negative pressure, and a portion of the end edge of the carrier film c having a constant width is suctioned to the suction surface 3.

Subsequently, the drum 2 rotates in the direction indicated by the arrow, and the slider 1 moves in the direction indicated by the arrow.
It moves at the same speed as the peripheral speed of. As a result, FIG.
As indicated by, the drum 2 rotates while rolling on the carrier film c. That is, the drum 2 moves in the direction of the arrow while rotating, with its peripheral surface always in contact with the surface of the carrier film c from above. Therefore, while pressing the laminated ceramic green sheets d from above so as not to float, only the carrier film c adsorbed on the flat adsorption surface 3 is peeled from one end edge toward the other end. .

After peeling the carrier film c in this way,
The negative pressure on the suction surface 3 of the drum 2 is released, and the peeled carrier film c is separated from the drum 2 and discarded. Further, the gloss sensor 5 detects the reflected light from the carrier film c and the ceramic green sheet d, and detects the presence or absence of the carrier film c based on the difference in the reflected light amount. Thus, after the peeling operation, and when the carrier film a is not peeled off, the peeling operation is performed again.

[0021]

As described above, according to the present invention, the carrier film c adsorbed on the adsorbing surface 3 is held at one edge while the ceramic green sheet d is pressed from above by the peripheral surface of the drum 2. Since it can be peeled from the ceramic green sheet d toward the other edge portion from the other, the carrier film can be surely peeled from the uppermost ceramic green sheet without causing delamination of the ceramic green sheet. .

[Brief description of drawings]

FIG. 1 is a side view showing a carrier film peeling apparatus for a ceramic green sheet according to an embodiment of the present invention and a peeling method using the same.

FIG. 2 is a perspective view showing a carrier film peeling device for a ceramic green sheet according to an embodiment of the present invention.

[Explanation of symbols]

 1 Slider 2 Drum 3 Drum suction surface 4 Guide rail 5 Gloss sensor 7 Vertical movement mechanism 8 Bearing 9 Linear drive motor 10 Motor for drum rotation

Claims (2)

[Reference number] 0040882-01 [Claims] 1. A method for peeling a carrier film (c) on an upper side of a ceramic green sheet (a) with a carrier film mounted on a laminating table (6) from the ceramic green sheet (d), in the longitudinal direction of a circumferential surface. Using a drum (2) having a partly flat suction surface (3) along the, and using the flat suction surface (3) of the drum (2) as a negative pressure,
The edge portion of the carrier film (c) on the ceramic green sheet (d) is adsorbed there, and then the drum (2) is moved toward the other edge portion of the carrier film (c) and is rolled and rotated. A method for peeling a carrier film from a ceramic green sheet, which is characterized in that: 2. An apparatus for peeling a carrier film (c) on an upper side of a ceramic green sheet (a) with a carrier film mounted on a laminating table (6) from the ceramic green sheet (d), in a longitudinal direction of a circumferential surface. A drum (2) having a suction surface (3) whose surface is partially flat along the surface of the drum (2), a rotary drive mechanism for rotating the drum (2), and the drum (2). A carrier film peeling apparatus for a ceramic green sheet, comprising: a linear drive mechanism for moving the drum (2) in the radial direction at a peripheral speed equal to the peripheral speed; and a mechanism for moving the drum (2) up and down.