JPH02196656A - Lamiantor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a laminator, and particularly to a technique that is effective when applied to a technique for attaching a film to a substrate.

[Prior Art] In this type of conventional laminator, the substrate is transported to the continuous film attachment position of the laminator.

The leading end of the continuous film is suctioned and conveyed to the continuous film attachment position using a suction member, and the continuous film is deposited in a manner corresponding to the length of the substrate with the leading end of the continuous film attached to the front end of the substrate. cutting to form a film sheet, and placing the cut film sheet on the substrate;
The layers were deposited one after another using a heat roll (see Japanese Patent Application Laid-Open No. 14876/1983).

[Problems to be Solved by the Invention] However, in the conventional laminator, when the film sheets are sequentially attached onto the substrate with a hero roll, minute air bubbles and water droplets are present on the surface of the substrate. As a result, there are problems in that air bubbles are generated at the interface between the film sheet and the substrate surface, and wrinkles are generated in the film sheet.

The present invention has been made to solve the above problems.

An object of the present invention is to prevent air bubbles from forming at the interface between the film sheet and the substrate surface and wrinkles from forming on the film sheet when the film sheets are sequentially attached onto the substrate using a hero roll. Our goal is to provide technology that can prevent this.

Another object of the present invention is, for example, to provide a technique that can improve the quality of printed wiring boards.

The above and other objects and novel features of the present invention are explained by the following description of the specification and the accompanying drawings.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a means for transporting a substrate to a continuous film adhesion position of a laminator, and a suction member to hold the leading end of the continuous film to the continuous film adhesion position. and a means of suctioning and transporting it.

means for cutting the continuous film in a manner corresponding to the length of the substrate with the leading end of the continuous film attached to the front end of the substrate; and means for sequentially attaching the cut film sheets to the substrate. In the laminator, when the film sheet is attached onto the substrate,
The most important feature is that a fluid spraying means is provided at the continuous film deposition position to prevent bubbles and wrinkles from occurring.

[Function] According to the above-mentioned means, when the film sheet is attached to the substrate, even if minute bubbles or water droplets are present on the substrate surface, the fluid spraying can move the means to the film attachment position. By spraying fluid (e.g. air) toward the substrate surface, it removes minute air bubbles and water droplets existing on the substrate surface, so air bubbles are not generated at the interface between the film sheet and the substrate surface. It is possible to prevent wrinkles from forming on the film sheet. This results in
For example, it is possible to improve the quality of printed wiring boards.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing the main parts of an autolaminator according to an embodiment of the present invention, in which a substrate 1 whose thickness is usually around 1.6 layers is transported in three directions of arrows by an inlet side feed roll 2. Films 4, 4 fed from both the top and bottom sides of the substrate 1 are laminated by thermocompression bonding by a pair of heat rolls 5, 5 consisting of induction heating jacket rollers, and then sent out by a feed roll 6. It is configured so that

Since these devices are arranged symmetrically on both the upper and lower ends of the substrate 1, the upper side of the substrate 1 will be described below for convenience of explanation.

In the feeding device for the film 4, a film formed of three layers including a photoresist layer as an intermediate layer, a polyethylene layer and a polyethylene terephthalate film layer on the surface is wound around a winding roll 7, and polyethylene is removed from the film layer. A take-up roll 8 is used to remove the layer. In addition, in order to send a predetermined length of film 4 to a predetermined length of substrate l, a free roller 9 that displaces its position up and down is used, and the film 4 is sent to a newly conveyed substrate 1. Each time, the free roller 9 moves under tension from the illustrated position 98 to the illustrated position 9b, and feeds the film 4 of a fixed length corresponding to the amount of displacement to the substrate 1.

A main vacuum plate 10 is provided vertically below the free roller 9. The main vacuum plate 10 has a vacuum chamber integrally formed therein and applies a suction force to the surface of the main vacuum plate 10. (Piston rod of) via a connecting member 12 so as to be movable in the vertical direction, and a vacuum chamber inside the vacuum pump (
(not shown) so that the film 4 is attracted by the main vacuum plate 10.

7 The first air cylinder 11 has connecting members 14a, 14
It is connected to the second air cylinder 15 via b,
Further, the second air cylinder 15 also includes a connecting member 14.
a, 14b, a rotary cutter device 16;
A sub-vacuum plate 17 that faces the cutter 16a of the cutter device 16, has an adsorption effect on its surface, and is located below the tip 10a of the main vacuum plate 10 operates in the horizontal direction via the piston rond 18a. It is connected to the third air cylinder 18. In addition,
The tip portion 10a of the main vacuum plate 10 has an arcuate cross section and includes a heater 13 therein.

Further below the sub-vacuum plate 17, a nozzle plate 19 is provided at a rear position in the advancing direction of the heat roll 5 and the substrate 1 facing thereto. In order to prevent the rear end of the film 4 cut by 16a from hanging down and to ensure that the rear end of the cut film 4 is properly attached to the substrate 1 without bubbles or wrinkles, The function is to blow out a small amount of air toward the heat roll 5.

FIG. 2 is an enlarged cross-sectional view of essential parts showing an embodiment of the drive device for the heat rolls 5, in which the pair of heat rolls 5, 5 are
They are respectively attached to a pair of frames 23, 23 so as to be rotationally driven via an intermediate gear 22 by a pair of transmission gears 21, 21 that mesh with each other, and both frames 23, 23 are connected to a hydraulic cylinder 24. As a result, the pair of heat rolls 5.5 are oscillated relative to each other about the rotation axis of the transmission gear 21 so that the distance between them facing each other is adjusted. One of the transmission gears 21 is connected to a rotating shaft of a drive motor. These mechanisms are attached to a piston 26 of a fluid pressure cylinder 25 via a moving body 27, and are configured to move in parallel to the traveling direction of the substrate 1 by the action of the fluid pressure cylinder 25. ing.

In addition, in the figure, 28 indicates a guide member.

The operation order according to this embodiment is as follows.

For convenience of explanation, the upper side of the board will be explained.
Exactly the same operation is performed on the lower side.

(1) After winding up the polyethylene layer of the film 4 composed of the three layers wound around the winding roll 7, the leading end of the film 4 is first Manually remove the lower main vacuum plate 1.
0 to the position of the tip 10a, that is, the cutter 16a.

(II) The substrate 1 is brought to a fixed position by the entrance side feed roll 2.
When the sub-vacuum plate 17 is conveyed, the inside of the sub-vacuum plate 17 is communicated with a vacuum pump, and the suction force of the sub-vacuum plate 17 causes the pulled-down film 4 (when continuous operation is performed, the film cut by the cutter 16a 4
), and while it is still attached, move the third air cylinder 1.
8, the leading end of the film 4 is wrapped around the arcuate surface of the leading end 10a of the main vacuum plate 10 where the vacuum suction action is working. At the same time, a film of a length that allows some leeway in the stroke of the main vacuum plate 10 is slackened by the free roller 9.

When the leading end of the substrate 1 is conveyed to a position almost directly below the main vacuum plate 10, the rotation of the entrance side feed roll 2 is stopped, and thereby the substrate 1 is stopped. Next, two pressing members hang down (not shown) and press the substrate 1.

(III) The first air cylinder 11 is operated to lower the film 4 adsorbed to the arcuate surface of the main vacuum plate 10, especially the tip 10a, to the position of the substrate 1, thereby applying uneven heat to the substrate 1. Crimp.

(rV) After the tip of the film 4 is unevenly pressed to the substrate 1, the vacuum adsorption action of the main vacuum plate 10 is temporarily stopped, and the film 4 is left free.

The main vacuum plate 10 is lifted upward from the substrate 1 by the first air cylinder 11. At this time, the second air cylinder 15 also operates, and the rotary cutter device 16, sub-vacuum plate 17, and connecting member 14a of the first air cylinder 11 also move upward away from the substrate 1 together.

(V) At the same time as the main vacuum plate 10 is moved away from the substrate 1 by a certain distance, the heat roll 5 approaches the substrate 1, rotates while clamping the substrate 1 to which the tip of the film 4 is unevenly heat-pressed, and 4 is thermocompressed and sent out. At this time, the vacuum suction action of the sub-vacuum plate 17 is stopped, and the sub-vacuum plate 17 returns to its original position on the left side of the figure, facing the cutter 16a.

(VI) With the film 4 sufficiently clamped by the heat roll 5 (during this time, the film 4 is continuously laminated onto the substrate 1), the free roller 9 returns to its original position 9a.

(■) When the film 4 is fed by a certain amount (a certain length), the second air cylinder 15 is activated, and the entire apparatus begins to descend and approach the substrate 1. At this time.

The film 4 is vacuum-adsorbed by the main vacuum plate 10 and the sub-vacuum plate 17, and the lamination speed of the film 4 on the substrate 1 is controlled by the main vacuum plate 10 and the sub-vacuum plate 17 by the second air cylinder 15 (the circumference of the heat roll 5). descend at a speed greater than (equal to the velocity).

When the main vacuum plate 10 and sub-vacuum plate 17 descend to a certain position (the lowest point), the main vacuum plate 10 and the sub-vacuum plate 17 stop descending. At this point in time, the film 4 is being moved between the sub-vacuum plate 17 and the heat roll 5.
is in a sagging condition.

During the period until the part of the film 4 in this slack state is completely fed to the heat roll 5, the part of the film located in the cutter unit is in a stopped position, so the cutter (rotary cutter) 16a is used to continuously cut the film 4 By moving the film 4 in the width direction of the
cut.

Note that the cutter 16a is lowered integrally with the main vacuum plate 10 and the sub-vacuum plate 17, and the lowering speed is set to be substantially the same or slightly faster than the circumferential speed of the heat roll 5. The cutter 16a may be cut while moving the continuous film in the width direction during the stroke process. In this case as well, the film 4 and the cutter 16a located in the cutter device section are moved relative to each other in the film feeding direction. Therefore, the film can be cut in the same way as when the film is in the stopped state.

(■) To prevent the film 4 cut as described above from hanging down, and to ensure a normal pressure bonding action without bubbles or wrinkles when the film 4 is thermocompression bonded to the substrate at the rear end of the cut film. Then, air is blown out from the nozzle plate 19 toward the heat roll 5. Note that by adjusting the amount of air blown from the nozzle plate 19, etc., the pressure flow rate and direction of the minute air can be adjusted.

(IK) After that, the clamping action of the heat rolls 5 is released, and the pair of heat rolls 5, 5 separate from each other and return to their original positions. At this time, the first to third air cylinders li, 1B have been returned to the position of the next preparation stage (the position shown in FIG. 1).

In addition, in the above embodiment, the free roller 9 which is subjected to tension action is used to smoothly feed the film 4.
However, this free roller is not necessarily necessary, and it is possible to replace it with other means, and it is also possible to use a hydraulic cylinder instead of the first to third air cylinders 11, 18, etc. Of course, the design of the device can be changed as appropriate. Note that the arcuate curved surface formed at the tip of the main vacuum plate 10 may have any shape as long as it allows the tip of the film 4 to be bonded to the substrate 1 by partial heat compression, and the shape is of course not limited to an arcuate cross section. be.

[Effects of the Invention] As explained above, according to the present invention, minute air bubbles and water droplets existing on the substrate surface are removed, so that air bubbles are not generated at the interface between the film sheet and the substrate surface. It is possible to prevent wrinkles from forming on the film sheet. Thereby, for example, it is possible to improve the quality of the printed wiring board.

[Brief explanation of the drawing]

FIG. 1 is a side view showing essential parts of an autolaminator according to an embodiment of the present invention. FIG. 2 is an enlarged view of essential parts showing an embodiment of a heat roll drive device used in the autolaminator of FIG. 1. FIG. In the figure, 1...Substrate, 4...Film, 5...Heat roll, 10...Main vacuum plate, 10
a...Tip of main vacuum plate, 11...
・First air cylinder, 15... Second air cylinder, 16... Rotary cutter device, 17... Sub-vacuum plate, 18... Third air cylinder,
19... Nozzle plate.

Claims (1)

[Claims] (1) means for conveying the substrate to the continuous film attachment position of the laminator; means for conveying the continuous film to the continuous film attachment position by suctioning the leading end of the continuous film with a suction member; A laminator comprising means for cutting a continuous film corresponding to the length of the substrate with the tip attached, and means for sequentially attaching the cut film sheet to the substrate,
A laminator characterized in that a fluid spraying means is provided at the continuous film attachment position to prevent bubbles and wrinkles from occurring when the film sheet is attached to the substrate.