JP2004314436A - Method and apparatus for manufacturing laminate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform lamination of high positional precision and the automation of lamination by image processing. <P>SOLUTION: The alignment mark 23 of a copper clad laminated sheet 21 and the alignment mark 31 of a translucent plastic film 29 are photographed by a CCD camera 9 equipped with an imaging part 3. At this time, the mark 23 of the copper clad laminated sheet can be recognized by changing the quantity of light of an LED 11 even if it is overlapped with the translucent plastic film 29. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and apparatus for manufacturing a laminate, and more particularly, to improve the accuracy of position recognition in image processing by making it easier to recognize alignment marks on a copper-clad laminate and a translucent film with a camera image. The present invention relates to a method for manufacturing a laminated body for producing a precise laminated body and an apparatus therefor.
[0002]
[Prior art]
In general, in order to align the copper-clad laminate and the translucent plastic film, the position of the alignment mark between the copper-clad laminate and the translucent plastic film is image-processed and read by a camera, and the position is determined. In some cases, the presence / absence of misalignment and the amount of misalignment of a translucent plastic film are measured (for example, Patent Document 1).
[0003]
For example, a copper-clad laminate, a translucent plastic film, a camera, and illumination (eg, LED) are arranged, and the camera recognizes alignment marks between the copper-clad laminate and the translucent plastic film.
[0004]
[Patent Document 1]
JP-A-62-132394 [0005]
[Patent Document 2]
Japanese Patent Application No. 2003-110298
[Problems to be solved by the invention]
The method for manufacturing such a laminate has the following problems. In other words, if the position of the alignment mark on the copper-clad laminate is hidden by not aligning with the hole position of the alignment mark on the translucent plastic film, if the lighting is brightened, the copper-clad laminate can be seen through the translucent plastic film. Can be recognized. However, in this case, the hole positions of the alignment marks of the translucent plastic film have low contrast and are difficult to recognize.
[0007]
Further, when the illumination is darkened, the position of the hole of the alignment mark of the translucent plastic film is increased in contrast and is easily recognized. However, in this case, if the alignment mark of the copper-clad laminate is hidden without aligning the hole of the alignment mark of the translucent plastic film, the translucent plastic film cannot be made transparent, so that the copper-clad laminate cannot be transparent. The alignment mark cannot be recognized.
[0008]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and the invention according to claim 1 is a method of performing positioning of a copper-clad laminate and a translucent plastic film, and laminating these at predetermined positions. A method of manufacturing a body, by irradiating the translucent plastic film superimposed on the copper-clad laminate with illumination from the side of the translucent plastic film, and appropriately adjusting the light amount of the illumination. A method of manufacturing a laminate in which an alignment mark provided on the copper-clad laminate and an alignment mark provided on the translucent plastic film are imaged and aligned.
[0009]
The invention according to claim 2 is a method for manufacturing a laminate in which a copper-clad laminate and a translucent plastic film are aligned and laminated at a predetermined position, wherein the alignment mark is formed at a predetermined position. A step of superposing the provided copper-clad laminate and a translucent plastic film provided with an alignment mark at a position corresponding to the alignment mark of the copper-clad laminate; and A step of irradiating illumination from the translucent plastic film side with the plastic films stacked, and adjusting the amount of illumination so that the translucent plastic film is transparent to image the alignment marks of the copper clad laminate. At the same time, adjust the amount of light to increase the contrast of the alignment marks on the translucent plastic film. Production of a laminate including a step of imaging the alignment mark of the LUM, and a step of correcting a deviation between the alignment mark of the imaged copper-clad laminate and the alignment mark of the translucent plastic film within a predetermined range. Is the way.
[0010]
The invention according to claim 3 is the method for manufacturing a laminate, wherein the alignment mark is recognized by changing at least one of the type, color, and position of the illumination.
[0011]
The invention according to claim 4 is an apparatus for manufacturing a laminate in which a copper-clad laminate and a translucent plastic film are aligned and laminated at a predetermined position, wherein the laminate is laminated on the copper-clad laminate. Means for irradiating the translucent plastic film with illumination from the side of the translucent plastic film, and an alignment mark provided on the copper-clad laminate by appropriately adjusting the amount of illumination. Means for imaging and positioning the alignment mark provided on the translucent plastic film.
[0012]
The invention according to claim 5 is an apparatus for manufacturing a laminate for aligning a copper-clad laminate and a translucent plastic film and laminating them at a predetermined position, wherein an alignment mark is formed at a predetermined position. The provided copper-clad laminate, means for superimposing a translucent plastic film provided with an alignment mark at a position corresponding to the alignment mark of the copper-clad laminate, and the translucent A means for irradiating illumination from the translucent plastic film side with the plastic films stacked, and adjusting the amount of illumination so that the translucent plastic film passes through, and imaging the alignment marks of the copper clad laminate. At the same time, adjust the amount of light to increase the contrast of the alignment marks on the translucent plastic film. Means for imaging the alignment mark of the LUM, and means for correcting the deviation between the alignment mark of the imaged copper-clad laminate and the alignment mark of the translucent plastic film within a predetermined range. Manufacturing equipment.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
[0014]
FIG. 1 shows a schematic configuration of a laminated body manufacturing apparatus 1 according to the present invention. The laminate manufacturing apparatus 1 includes an imaging unit 3, a bonding unit 5, and a control unit 7. Then, the laminate manufacturing apparatus 1 images the alignment mark of the copper-clad laminate set on the bonding apparatus 5 and the alignment mark of the translucent plastic film by the CCD camera 9. Here, the alignment mark provided at a predetermined position of the copper-clad laminate is formed by a punched hole of a substantially circular conductive foil, and the alignment mark provided at a predetermined position of the translucent plastic film is provided. The mark is a substantially circular punched hole, which is larger than the punched hole of the conductive foil.
[0015]
In this example, the copper-clad laminate has, for example, a copper conductor pattern attached to the laminate. Further, the translucent plastic film includes a coverlay or the like for protecting the copper pattern. Then, the two sheets are laminated to produce a flexible printed board or the like.
[0016]
Return description. The imaging unit 3 includes a CCD camera 9 for imaging the alignment mark of the copper-clad laminate and the alignment mark of the translucent plastic film, an illumination unit (LED or the like) 11 for irradiating an imaging location when imaging, A light amount adjusting unit 13 for adjusting the amount of light to be irradiated is provided. When imaging the alignment mark 23 of the copper-clad laminate, the light-amount adjusting unit 13 increases the light amount and makes the translucent plastic film 29 transparent. Thereby, even if the alignment mark 23 of the copper-clad laminate 21 is located below the translucent plastic film 29 (back side), it can be recognized.
[0017]
Further, when imaging the alignment mark 31 of the translucent plastic film 29, the light amount is weakened. The darker illumination provides a sharper contrast and allows more accurate reading of the alignment marks on the translucent plastic film. By measuring the positions of the alignment marks 23 and 31 without moving the CCD camera 9, the relative positions of the two can be accurately read.
[0018]
The bonding section 5 (in FIG. 1, a cross-sectional view as viewed from the side) includes one stage 19 that supports the copper-clad laminate 21 and the other stage 25 that supports a translucent plastic film 29. ing. The copper clad laminate 21 is provided with an alignment mark 23, and the translucent plastic film 29 is provided with an alignment mark 31. The other stage 25 is provided with an observation hole 27 for observing the alignment marks 23 and 31 with the CCD camera 9.
[0019]
The bonding unit 5 includes a mechanical unit 15 that is a mechanical part, and a driving unit 17 that drives the mechanical unit 15 based on sequence data or the like. Thereby, the stage can be moved to a predetermined position.
[0020]
FIG. 2 shows an embodiment in which the alignment mark of the copper-clad laminate is recognized through a translucent plastic film. Referring to FIG. This is a state in which a positioning mark (for example, a portion having no conductor; the same applies hereinafter) 67 of the copper-clad laminate 65 is completely inside a mark (for example, a hole; the same applies hereinafter) 63 of the translucent plastic film 61. In this case, the circular shape of the alignment mark of the copper clad laminate 67 can be recognized without any problem.
[0021]
Referring to FIG. The circular shape of the alignment mark 71 of the translucent plastic film 69 and the circular shape of the alignment mark 75 of the copper-clad laminate 73 partially overlap. In this case, the translucent plastic film 69 can be seen through since the image is read with the illumination light amount being appropriate (increased). Therefore, the circular shape of the alignment mark 75 of the copper-clad laminate 73 can be recognized without any problem.
[0022]
FIG. 2C is referred to. An alignment mark 83 of the copper-clad laminate 81 exists outside the circular shape of the mark 79 of the translucent plastic film 77. In this case, the translucent plastic film 77 can be seen through since the image is read with the illumination light amount being appropriate (increased). Therefore, the circular shape of the alignment mark 83 of the copper clad laminate 81 can be recognized without any problem.
[0023]
FIG. 3 shows an embodiment in which the alignment mark of the translucent plastic film is recognized. Referring to FIG. The alignment mark 91 of the copper clad laminate 89 is completely inside the alignment mark 87 of the translucent plastic film 85. In this case, the circular shape of the alignment mark 87 of the translucent plastic film 85 can be recognized without any problem. Further, since the illumination is darkened, the outline of the edge of the alignment mark 87 becomes clear, and the hole position can be read accurately.
[0024]
Referring to FIG. The circular shape of the alignment mark 95 of the translucent plastic film 93 and the circular shape of the alignment mark 99 of the copper-clad laminate 97 partially overlap. In this case, since most of the circular shape of the alignment mark 95 of the translucent plastic film 93 can be recognized, the position of the alignment mark 95 of the translucent plastic film 93 can be calculated although the positional accuracy is slightly lowered.
[0025]
Referring to FIG. The alignment mark 107 of the copper-clad laminate 105 exists outside the circular shape of the alignment mark 103 of the translucent plastic film 101. In this case, the circular shape of the alignment mark 103 of the translucent plastic film 101 can be completely recognized.
[0026]
FIGS. 4 and 5 show a change in an image due to a change in illuminance of illumination. FIG. 4A shows each alignment mark image when the thickness is 50 (μm) and the illuminance is 100 (lx). In the following description, the thickness refers to the sum of the thickness of the plastic film and the thickness of the adhesive.
[0027]
FIG. 4B shows each alignment mark image when the thickness is 25 (μm) and the illuminance is 100 (lx). FIG. 5A shows each alignment mark image captured when the thickness is 50 (μm) and the illuminance is 200 (lx). FIG. 5B is an image of each alignment mark when the thickness is 50 (μm) and the illuminance is 300 (lx). FIG. 5C shows each alignment mark image when the thickness is 25 (μm) and the illuminance is 200 (lx).
[0028]
From the above image, for example, when the thickness is 25 μm as shown in FIG. 4B, an illuminance of 100 (lx) is suitable for observing the alignment marks on the translucent plastic film 111. In order to observe the alignment mark of the copper-clad laminate, if the alignment mark of the copper-clad laminate is hidden by the translucent plastic film, the translucent plastic film is illuminated at an illuminance of 100 (lx). The range that can be seen through is narrow. Therefore, as shown in FIG. 5C, when the illuminance is increased to 200 (lx), the range that can be observed through the translucent plastic film 119 is widened.
[0029]
In the case of a thickness of 50 (μm), an illuminance of 100 (lx) is suitable for observing the alignment marks on the translucent plastic film 109 as shown in FIG. However, when observing the alignment mark of the copper-clad laminate, if the alignment mark of the copper-clad laminate is hidden by a translucent plastic film, it is impossible to observe the alignment mark at an illuminance of 100 (lx) at all. Can not. Therefore, as shown in FIG. 5A, when the illuminance is increased to 200 (lx), the range that can be observed through the slightly translucent plastic film 115 is widened. When the illuminance is further increased to 300 (lx) as shown in FIG. 5B, the range that can be observed through the more translucent plastic film 117 becomes wider.
[0030]
As described above, if the amount of illumination is set to a predetermined value in advance for a translucent plastic film and a change in thickness, the alignment mark of the copper-clad laminate and the alignment mark of the translucent plastic film are appropriate. Can be recognized.
[0031]
Here, not only the brightness of the illumination is changed, but also the type, color, and position of the illumination can be changed, so that the conductor mark and the translucent plastic film mark can be properly recognized. For example, the copper pattern of a copper-clad laminate reflects neatly like a mirror (a lot of direct light), so when observing the copper pattern, irradiate the LED from the vertical direction as much as possible (so that much light enters the camera). . Conversely, since a translucent plastic film reflects irregularly like paper (a lot of indirect light), when observing a translucent plastic film, irradiate the LED from an oblique direction as much as possible (so that almost no direct light enters the camera). . Since light having a shorter wavelength has a higher scattering rate, that is, is suitable for viewing indirect light, LED light of a shorter wavelength (such as blue) is used when observing a translucent plastic film.
[0032]
FIG. 6 is a flowchart showing the operation of the manufacturing apparatus 1 for a laminate.
[0033]
First, in step S601, a copper-clad laminate (hereinafter, referred to as CCL) and a translucent plastic film (hereinafter, referred to as CL) are overlaid. In step S603, the camera is moved so that the alignment mark can be observed with the camera from the CL side.
[0034]
In step S605, the light amount of the LED is increased (brightened) during CCL observation. The position of the CCL mark in the field of view of the camera is measured with the amount of light increased. In step S607, the light amount of the LED is reduced (darkened) during CL observation. The position of the CL mark in the field of view of the camera is measured with the light amount reduced.
[0035]
In step S609, a relative position (a positional deviation amount) between CCL and CL is calculated from the results obtained in step S605 and step S607.
[0036]
In step S611, if necessary, steps S603 to S609 are repeated on a plurality of alignment marks to calculate the amount of positional deviation between CCL and CL.
[0037]
In step S613, the amount of positional deviation between CCL and CL is calculated from the results of the above-described processes, and the CCL (or CL) is moved so that the positional deviation is minimized.
[0038]
The present invention is not limited to the above-described embodiments, but can be embodied in other modes by making appropriate changes.
[0039]
【The invention's effect】
ADVANTAGE OF THE INVENTION As mentioned above, according to the manufacturing method and apparatus of the laminated body which concerns on this invention, the alignment mark of a copper-clad laminated board and the alignment mark of a translucent plastic film can be recognized. That is, for example, there is an effect that the two types of alignment marks can be recognized simply by changing only the illumination without moving the CCD camera. Then, there is an effect that the position reading accuracy is improved.
[0040]
Further, the type, color, and position of the illumination are changed. For example, since the copper pattern of the copper-clad laminate reflects finely like a mirror, when observing the copper pattern, the LED is irradiated from the vertical direction as much as possible. Conversely, a translucent plastic film reflects irregularly like paper, so that when observing a translucent plastic film, the LED is irradiated from an oblique direction as much as possible. In addition, since light having a shorter wavelength has a higher scattering rate, that is, it is suitable for viewing indirect light, LED light having a shorter wavelength is used when observing a translucent plastic film. Thereby, both alignment marks can be imaged more clearly.
[Brief description of the drawings]
FIG. 1 is a schematic diagram for explaining an outline of an apparatus for manufacturing a laminate.
FIG. 2 is an explanatory diagram illustrating recognition of an alignment mark.
FIG. 3 is an explanatory diagram illustrating recognition of an alignment mark.
FIG. 4 is an explanatory diagram illustrating a change in an image of a positioning mark due to illumination.
FIG. 5 is an explanatory diagram illustrating a change in an image of a positioning mark due to illumination.
FIG. 6 is a flowchart illustrating an operation of the apparatus for manufacturing a laminate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Manufacturing apparatus 3 of a laminated body 3 Imaging part 5 Bonding part 7 Control part 9 CCD camera 11 LED
13 Light intensity adjustment unit 15 Mechanism unit 17 Drive unit

Claims (5)

A method for producing a laminate in which a copper-clad laminate and a translucent plastic film are aligned, and these are laminated at a predetermined position.
The semi-transparent plastic film superimposed on the copper-clad laminate is irradiated with illumination from the side of the semi-transparent plastic film, and the light amount of the illumination is appropriately adjusted to provide the copper-clad laminate. A method of manufacturing a laminated body, characterized in that the alignment marks provided and the alignment marks provided on the translucent plastic film are imaged and aligned. A method for producing a laminate in which a copper-clad laminate and a translucent plastic film are aligned, and these are laminated at a predetermined position.
A step of superimposing a copper-clad laminate provided with an alignment mark at a predetermined position and a translucent plastic film provided with an alignment mark at a position corresponding to the alignment mark of the copper-clad laminate,
Irradiating illumination from the translucent plastic film side in a state where the translucent plastic film is overlaid on the copper-clad laminate,
The amount of illumination is adjusted so that the translucent plastic film is transparent, and the alignment mark of the copper-clad laminate is imaged, and the amount of illumination is adjusted so as to increase the contrast of the alignment mark of the translucent plastic film. Imaging the alignment mark of the translucent plastic film;
A step of correcting the misalignment between the alignment mark of the captured copper-clad laminate and the alignment mark of the translucent plastic film within a predetermined range,
A method for producing a laminate, comprising: The method according to claim 1, wherein the alignment mark is recognized by changing at least one of a type, a color, and a position of the illumination. A copper-clad laminate and a translucent plastic film are aligned with each other, and a laminate manufacturing apparatus for laminating them at a predetermined position,
A means for irradiating the translucent plastic film superimposed on the copper-clad laminate with illumination from the side of the translucent plastic film,
By appropriately adjusting the amount of light of this illumination, a positioning mark provided on the copper-clad laminate, and means for imaging and positioning a positioning mark provided on the translucent plastic film,
An apparatus for manufacturing a laminate, comprising: A copper-clad laminate and a translucent plastic film are aligned with each other, and a laminate manufacturing apparatus for laminating them at a predetermined position,
A copper-clad laminate provided with an alignment mark at a predetermined position, and means for superimposing a translucent plastic film provided with an alignment mark at a position corresponding to the alignment mark of the copper-clad laminate,
Means for irradiating illumination from the translucent plastic film side in a state where the translucent plastic film is overlaid on the copper-clad laminate,
The amount of illumination is adjusted so that the translucent plastic film is transparent, and the alignment mark of the copper-clad laminate is imaged, and the amount of illumination is adjusted so as to increase the contrast of the alignment mark of the translucent plastic film. Means for imaging the alignment mark of the translucent plastic film,
Means for correcting the deviation between the alignment mark of the imaged copper-clad laminate and the alignment mark of the translucent plastic film within a predetermined range,
An apparatus for manufacturing a laminate, comprising:

Images