JP2006053030A - Edge detection method for translucent film, edge detection system and manufacturing method and manufacturing equipment of laminated ceramic electronic part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a edge detection method for translucent film capable of accurately detecting the edge of a translucent film and reducing placing space. <P>SOLUTION: On one side of the translucent film 2, a light source 6 and a photographing device 7 are arranged and light is cast from the light source 6 on one side of the translucent film 2. On the other side of the translucent film 2 in the part the light is cast, a hardly reflexive material 5 is arranged. With a camera 7 the part where the edge 2a of the translucent film 2 exists is photographed so as to receive the reflection light reflected from the upper surface of the translucent film 2. The edge 2a is detected in the edge detection method for translucent film 2 from the brightness difference in the image between the upper surface of the translucent film 2 and the part where the hardly reflexive material 5 is provided outside the edge 2a of the translucent film 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method and an apparatus for detecting an edge of a translucent synthetic resin film, and more specifically, for example, a multilayer ceramic using a composite sheet in which a ceramic green sheet and a conductor pattern are laminated on a translucent film. The present invention relates to an edge detection method and apparatus capable of optically detecting an edge of a light-transmitting film in the manufacture of an electronic component, and a method and apparatus for manufacturing a multilayer ceramic electronic component using the edge detection method and apparatus.

  Conventionally, when manufacturing a multilayer ceramic electronic component, a long translucent film made of a synthetic resin is often used as a support film. For example, a ceramic green sheet and / or a conductor pattern is formed on a long translucent film, and a composite sheet is prepared. This composite sheet is once wound up in a roll shape. In the next step, the composite sheet wound in a roll shape is conveyed in the length direction, and the ceramic green sheet and / or the conductor pattern supported by the translucent film is predetermined from above the translucent film. It is cut to the size of and peeled off. And the laminated body is obtained by laminating | stacking several cut | disconnected ceramic green sheets and / or conductor patterns.

  By the way, when a ceramic green sheet and / or a conductor pattern is cut out from the composite sheet and peeled off, the position in the width direction of the conductor pattern needs to be controlled with high accuracy. Otherwise, the cutting cannot be performed with high accuracy.

  Therefore, conventionally, when the composite sheet is conveyed, the position in the width direction is controlled on the basis of the side edge, that is, the edge of the translucent film. An example of an apparatus for detecting the edge of a translucent film is disclosed in Patent Document 1 below.

  14A and 14B are a partially cutaway side view and a front view for explaining an edge detection method for a light-transmitting film described in Patent Document 1. FIG. In FIG. 14A, the long translucent film 101 is conveyed along the length direction L thereof. A light source 102 is disposed below the long translucent film 101. An image camera 103 is disposed above the translucent film 101. The image camera 103 is connected to the image sensor 104.

Here, light is irradiated from the light source 102 to the lower surface of the film 101 so as to form an inclination angle α. Then, the image camera 103 images the translucent film 101 from a direction that forms an inclination angle α with the upper surface of the translucent film 101. In this way, the edge of the translucent film 101 is formed on the edge of the translucent film 101 based on the difference between the brightness of the portion that has passed through the translucent film 101 and the brightness of the portion where the translucent film 101 does not exist. It is possible to detect.
JP-A-6-60805

  However, in the edge detection method of the translucent film described in Patent Document 1, the irradiation direction of light from the light source 102 to the translucent film 101 is set so as to form the inclination angle α, and the image camera 103 is also used. The light entering from a direction that forms an inclination angle α with the upper surface of the translucent film 101 is received. The inclination angle α had to be set to an appropriate size depending on the transparency of the translucent film 101, that is, the light attenuation factor. That is, when the translucent film 101 is changed, the inclination angle α has to be adjusted again to an appropriate size.

  In addition, since the light source 102 and the image camera 103 must be disposed separately above and below the translucent film 101, a large space is required. Furthermore, in order to measure a plurality of edges, a plurality of image cameras 103 and a plurality of light sources 102 have to be required.

  In addition, when the translucent film 101 is not a long film but a translucent film having a certain area, the area can be obtained by the method described in Patent Document 1. There wasn't.

  Further, as described above, when manufacturing a multilayer ceramic electronic component, when cutting a ceramic green sheet and / or a conductor pattern supported on a translucent film into a predetermined size, the edge of the translucent film is It is necessary to arrange not only the position but also the area to be cut, that is, the conductor pattern printing area, with respect to the cutting blade or the like with high accuracy. Therefore, it has been necessary to accurately detect the distance between the edge of the translucent film and the conductor pattern.

  On the other hand, in the roll around which the composite sheet is wound, the distance between the edge of the translucent film and the region to be cut must be varied for each roll.

  An object of the present invention is to provide an edge detection method and a detection device for a translucent film, and a translucency, which can automatically detect the edge of the translucent film with high accuracy in view of the current state of the prior art. Manufacturing method of multilayer ceramic electronic component including process capable of accurately detecting distance between edge of film and conductor pattern and correcting position of composite sheet with high accuracy, and manufacturing used in the manufacturing method To provide an apparatus.

  The edge detection method of the translucent film of the present invention includes a light source disposed on one side of the translucent film, and light emitted from the light source is regularly reflected on one side of the translucent film. An imaging device is disposed on the same side of the translucent film as the light source is disposed so that reflected light is incident, and the light source and the imaging device of the translucent film are disposed. A step of disposing a non-reflective member having a surface on which light emitted from the light source is less likely to be regularly reflected than the translucent film, on the outside of the surface opposite to the side, and from the light source, Irradiating light toward the translucent film part inside the edge of the translucent film and the outer part of the edge, and imaging the part including the edge of the translucent film with the imaging device; To images taken by the imaging device There are, said a region where the reflected light is observed, characterized in that the boundary between the reflected light is not observed region and a step of detecting an edge of the translucent film.

  A method for producing a multilayer ceramic electronic component according to the present invention comprises preparing a composite sheet in which a ceramic green sheet is formed on a long translucent film and a conductor pattern is formed on the ceramic green sheet. The composite sheet was transported in the length direction of the translucent film, and the ceramic green sheet and the conductor pattern supported by the translucent film were cut out and cut out at a cutting station so as to have a predetermined planar shape. A method for producing a laminated ceramic electronic component comprising the steps of laminating a plurality of ceramic green sheets and conductor patterns, wherein after preparing the composite sheet, according to the edge detection method of a translucent film according to the present invention, While detecting the edge of the light film, the image taken by the imaging device A step of detecting an edge of the conductor pattern close to an edge of the translucent film based on a difference between a photographed image of the ceramic green sheet and the conductor pattern, and when the composite sheet is conveyed to the cutting station, a cutting station And a step of correcting the position of the translucent film in the width direction based on the distance between the edge of the translucent film and the edge of the conductive pattern.

  An edge detection device for a translucent film according to the present invention is an apparatus for detecting an edge of a translucent film, and is disposed on one surface side of the translucent film. A light source that irradiates light in a direction and a light-transmitting film that is disposed on the same surface side as the light-transmitting film side of the light-transmitting film. An imaging device that receives reflected light after being reflected on the surface and images an area including an edge portion of the translucent film, and a side on which the light source and the imaging device of the translucent film are disposed It is disposed on the opposite surface and is connected to the imaging device with a non-reflective member having a surface that makes it difficult to regularly reflect light from the light source as compared to the translucent film. Processing the obtained image, Characterized in that it comprises an image processing device for detecting an edge of the light-transmitting film based on the.

  An apparatus for manufacturing a multilayer ceramic electronic component according to the present invention provides a composite sheet in which a ceramic green sheet is formed on a long translucent film and a conductor pattern is formed on the ceramic green sheet. The composite sheet is conveyed in the length direction of the translucent film, and the ceramic green sheet and the conductor pattern supported by the translucent film are cut out and cut out at a cutting station so as to have a predetermined planar shape. An apparatus used in the manufacture of a multilayer ceramic electronic component comprising the steps of laminating a plurality of ceramic green sheets and a conductor pattern, comprising: a translucent film edge detection device configured according to the present invention; and the composite sheet. A conveying means for conveying the translucent film in a length direction; and the cutting station. And a film moving means for moving the translucent film in the width direction in order to correct the position in the width direction of the translucent film, and the image processing apparatus includes an edge of the translucent film. And detecting an outer edge of the conductor pattern based on an image photographed by the imaging device, between the outer edge of the conductor pattern and the edge of the translucent film. A correction amount of the position in the width direction of the translucent film on the upstream side of the cutting station is obtained based on the distance, and further includes control means for driving the film moving means according to the correction amount. To do.

  In the edge detection method of the translucent film which concerns on this invention, since the said light source and an imaging device should just be arrange | positioned in the one surface side of a translucent film, a space can be reduced. That is, since it is only necessary to arrange a non-reflective member on the opposite surface side of the translucent film, the space can be reduced as compared with the configuration in which the light source and the imaging device are dispersedly arranged on both sides of the film. it can.

  In the edge detection method of the present invention, light is emitted from the light source toward the translucent film portion inside the edge of the translucent film and the outer portion of the edge, and the portion including the edge is imaged by the imaging device. Is done. And in the image image | photographed with the imaging device, the area | region where reflected light is observed becomes bright, and it becomes relatively dark in the area | region which is outside an edge and it is difficult to obtain reflected light with a hardly reflective member. Therefore, the edge of the translucent film can be easily detected from the image photographed by the photographing apparatus.

  Further, in the method for manufacturing a multilayer ceramic electronic component according to the present invention, a composite sheet formed by forming a ceramic green sheet and a conductor pattern on a long translucent film is conveyed in the length direction of the translucent film. The laminate is obtained by laminating a plurality of ceramic green sheets and conductor patterns cut out at a cutting station so that the ceramic green sheet and the conductor pattern supported by the translucent film have a predetermined planar shape. obtain. In this manufacturing method, after preparing the composite sheet, the edge of the translucent film is detected according to the edge detection method of the translucent film of the present invention. Therefore, the edge of the translucent film can be detected quickly and with high accuracy from the image taken by the imaging device without requiring a large space. In addition, along with the detection of the edge of the translucent film, the edge of the conductor pattern close to the edge of the translucent film is higher due to the difference between the captured image of the ceramic green sheet and the conductor pattern. Detected with accuracy. Therefore, when the distance between the edge of the translucent film and the edge of the conductor pattern is obtained and the composite sheet is conveyed to the cutting station based on the distance, the position in the width direction of the translucent film can be easily set. In addition, correction can be performed with high accuracy. Therefore, even if the distance between the edge of the translucent film and the edge of the conductor pattern varies in the prepared composite sheet, the ceramic green sheet and the conductor pattern can be cut out with high accuracy at the cutting station. it can. In the production of the multilayer ceramic electronic component, it is possible to increase the accuracy of the obtained multilayer body.

  An edge detection device for a translucent film according to the present invention includes the light source, an imaging device, a hardly reflective member, and an image processing device. Therefore, the translucent film edge detection method according to the present invention is transparent. It becomes possible to detect the edge of the light film with high accuracy.

  The multilayer ceramic electronic component manufacturing apparatus according to the present invention includes a transport means for transporting the composite sheet in the length direction of the translucent film, in addition to the translucent film edge detecting apparatus configured according to the present invention. And the film moving means for moving the translucent film in the width direction, and the width direction of the translucent film on the upstream side of the cutting station based on the distance between the outer edge of the conductor pattern and the edge of the film A ceramic green sheet supported by a translucent film according to the method for producing a laminated ceramic electronic component of the present invention, and a control means for determining a position correction amount and driving a film moving means according to the correction amount The conductor pattern can be cut out with high accuracy at the cutting station. Therefore, the precision of the obtained multilayer ceramic electronic component can be effectively increased when manufacturing the multilayer ceramic electronic component.

  Hereinafter, the present invention will be clarified by describing specific embodiments of the present invention with reference to the drawings.

  FIGS. 1A and 1B are a perspective view for explaining a method of manufacturing a multilayer ceramic electronic component according to the first embodiment of the present invention and a schematic diagram showing an image taken by a camera.

  In this embodiment, first, a composite sheet 1 shown in FIG. The composite sheet 1 has a long translucent film 2. The translucent film 2 is made of a transparent or translucent synthetic resin film such as a polypropylene film or a polyethylene terephthalate film. A ceramic green sheet 3 is formed on the upper surface of the long translucent film 2 along the length direction of the translucent film 2. One end edge 3 a of the ceramic green sheet 3 is arranged at a predetermined distance from the edge 2 a of the translucent film 2. A conductor pattern 4 is formed on the ceramic green sheet 3. The conductor pattern 4 is formed by an appropriate method such as screen printing of a conductive paste. The edge 4a of the conductor pattern 4 on the side close to the edge 2a of the translucent film 2 is disposed with a gap from the edge 3a of the ceramic green sheet 3.

  Below the composite sheet 1, a hardly reflective plate 5 as a hardly reflective member is disposed. The hard-reflective plate 5 as a hard-reflective member can be made of an appropriate material that makes it difficult to regularly reflect light from a light source described later than the translucent film 2. Examples of such a material include an irregularly reflective member and a light absorbing member that absorbs light from a light source.

  It is only necessary that at least the upper surface of the hardly reflective member is made of a hardly reflective material. FIG. 2 is a cross-sectional view of the long composite sheet 1 shown in FIG. The composite sheet 1 described above is placed on the upper surface of the hardly reflective plate 5.

  On the other hand, in the production of the multilayer ceramic electronic component of the present embodiment, the long composite sheet 1 is conveyed in the length direction, and the ceramic green sheet 3 and the conductive pattern are cut at a cutting station schematically shown by Z in FIG. 4 is cut out so as to have a predetermined planar shape.

  As will be described later, the cut ceramic green sheet 3 and the conductor pattern 4 are laminated on a lamination stage, thereby obtaining a laminated body for obtaining a laminated ceramic electronic component.

  On the other hand, the composite sheet 1 is previously wound in a roll shape, and is sent out from the structure wound in the roll shape, and the length of the composite sheet 1 is indicated by an arrow A in FIG. Being conveyed in the direction. This conveyance is performed by a conveyance means (not shown). An appropriate drive source such as a motor can be used as the transport means.

  On the other hand, a light source 6 and a camera 7 as an imaging device are disposed above the composite sheet 1. In the present embodiment, the light source 6 projects ring-shaped light onto a region including the edge 2 a of the translucent film 2 of the composite sheet 1. Further, in the region where light is projected downward from the light source 6, the above-described hardly reflective plate 5 is disposed. In the translucent film 2, the light projected from the light source 6 is reflected, the reflected light is received by the camera 7 as an imaging device, and the area where the lower light is projected is photographed by the camera 7. The

  As the light source 6, an appropriate lighting device that can irradiate ring-shaped light can be used. Examples of such lighting devices include LED lighting and halogen lighting.

  Further, as the camera 7, various imaging devices such as an image camera can be used.

  An image processing device 8 is electrically connected to the camera 7. The image processing device 8 is provided with a video signal photographed by the camera 7, performs image processing, and displays an image. FIG. 1B shows an image processed by the image processing apparatus 8 and displayed on a monitor provided in the image processing apparatus 8 or outside the image processing apparatus 8.

  In FIG. 1B, in the image 11, the ring-shaped light is reflected in the portion where the ring-shaped light is reflected by the translucent film 2, that is, inside the edge 2 a of the translucent film 2. The portion 12 is indicated by a white graphic. This is because the reflected light is received by the camera 7 and the portion where the reflected light is generated looks bright. On the other hand, in the region where the hardly reflective plate 5 is disposed, the light is absorbed on the hardly reflective plate 5 side, so that the reflected light is not generated. Accordingly, as shown by hatching shown by crossing the oblique lines in FIG. 1B, the portion where the light-transmitting film 2 is not present on the upper surface is darkly displayed in the region where the hardly reflective plate 5 is arranged. Is done. Therefore, it can be easily understood that the boundary between the portion 12 brightly displayed by the reflected light and the portion darkly displayed by the hardly reflective plate 5 is the edge 2a.

  On the other hand, since the ceramic green sheet 3 is brighter than the conductor pattern 4, the boundary between the ceramic green sheet 3 and the conductor pattern 4, that is, the edge 4 a of the conductor pattern 4 is also obtained by the image processing apparatus 8. Can be easily grasped.

  In the present embodiment, based on the image obtained by the image processing device 8 in this way, the control device 9 shown in FIG. 1 performs the operation between the edge 2 a of the translucent film 2 and the edge 4 a of the conductor pattern 4. The distance X is calculated.

  As described above, the distance X between the edge 2a of the translucent film 2 and the edge 4a of the conductor pattern 4 must be varied for each roll prepared. In the present embodiment, even if the distance X varies, the control device 9 uses the translucent film so that the ceramic green sheet 3 and the conductor pattern 4 are accurately cut out at the cutting station Z according to the measured value of the distance X. The position correction amount in the width direction of 2 is calculated. The position correction amount in the width direction is accurately positioned at the target distance predetermined in the width direction of the translucent film 2 with respect to the cutting tool at the edge 4a of the conductor pattern 4 at the cutting station Z. Thus, it is an amount necessary to move the width direction position of the translucent film 2 in the width direction on the upstream side of the cutting station Z.

  Then, after calculating the position correction amount, the control device 9 drives the film moving device 10 schematically shown in FIG. 1 to move the translucent film 2 by an amount according to the position correction amount. It is moved in the width direction on the upstream side of the cutting station Z. Therefore, at the cutting station Z, the edge 4a of the conductor pattern 4 is arranged with a high precision by the target distance described above in the width direction of the cutting tool and the film 2. Therefore, in the cutting station Z, the ceramic green sheet 3 and the conductor pattern 4 can be cut out with high accuracy.

  In the present embodiment, a plurality of ceramic green sheets and conductor patterns cut out as described above are laminated, thereby obtaining a mother laminate 13 shown in FIG. Thereafter, the mother laminate 13 is pressed in the thickness direction, and then cut into individual laminate ceramic electronic component units. A ceramic sintered body 14 shown in FIG. 4 can be obtained by firing the laminate thus obtained. In the ceramic sintered body 14, the plurality of internal electrodes 15a to 15d are arranged so as to overlap with each other with the ceramic layer interposed therebetween. And since the conductor pattern 4 is cut out with high precision in the cutting station Z as mentioned above, in the obtained ceramic sintered compact 14, several internal electrodes 15a-15d are arrange | positioned with high precision. become. Therefore, by forming the external electrodes 17 and 18 on the end faces 14a and 14b of the ceramic sintered body 14, the multilayer ceramic capacitor 19 having excellent dimensional accuracy and positional accuracy of the internal electrodes 15a to 15d is provided. It becomes possible to do.

  Although the multilayer ceramic capacitor 19 has been described as an example of the multilayer ceramic electronic component, the multilayer ceramic electronic component can be used to manufacture other multilayer ceramic electronic components other than the multilayer ceramic capacitor. That is, the present invention can be used for manufacturing various multilayer ceramic electronic components such as multilayer ceramic inductors, ceramic multilayer substrates, multilayer varistors and the like.

  In the above embodiment, the light source 6 that irradiates ring-shaped light is disposed above the translucent film 2, and light is emitted from the light source 6 in a direction perpendicular to the upper surface of the translucent film 2. The position of the camera is not limited to the configuration shown in FIG. FIGS. 5A and 5B are a front sectional view and a partially cutaway side sectional view for explaining the method of manufacturing the multilayer ceramic electronic component of the second embodiment in which the positions of the light source and the camera are changed.

  As shown in FIGS. 5A and 5B, a light source 26 and a camera 27 are disposed above the composite sheet 1. Here, the composite sheet 1 is irradiated with light from the light source 26 so as to form an inclination angle β. And the light reflected by the translucent film 2 of the composite sheet 1 proceeds to the camera 27 side so as to form an inclination angle α. Thus, the light source 26 may be arranged such that the direction of light emitted from the light source 26 toward the upper surface of the translucent film 2 forms an inclination angle β with the upper surface of the translucent film 2. In the embodiment shown in FIG. 5, the hardly reflective plate 5 is separated downward from the lower surface of the translucent film 2. As described above, the hardly reflective member 5 may be in contact with the lower surface of the translucent film 2 or may be spaced downward from the lower surface.

  FIG. 6 is a schematic diagram showing an image sent from the camera 27 to the image processing apparatus and obtained by the image processing apparatus in the configuration shown in FIGS. 5 (a) and 5 (b). As is clear from FIG. 6, in this image as well, the portion where the translucent film 2 is located becomes bright and light is not reflected by the hardly reflective plate 5. It can be easily detected that the boundary is the edge 2 a of the translucent film 2. Similarly, since the brightness of the ceramic green sheet 3 and the conductor pattern 4 are greatly different in the image, the edge 4a of the conductor pattern 4 can be easily detected.

  FIG. 7 is a perspective view for explaining a method for manufacturing a multilayer ceramic electronic component according to a third embodiment of the present invention, and FIG. 8 is a cross-sectional view schematically showing an essential part thereof.

  In the third embodiment, the coaxial incident lens 31 is disposed above the composite sheet 1. The coaxial incident lens 31 is connected to an optical waveguide 33 that guides light from the light source 32. The upper end of the coaxial incident lens 31 is connected to a camera 34 as an imaging device.

  As shown in FIG. 8, the light from the light source 32 is guided into the coaxial incident lens 31 via the optical waveguide 33, the direction is changed in the coaxial incident lens 31, and the lower composite sheet 1 is irradiated. The And the light reflected by the upper surface of the translucent film 2 of the composite sheet 1 returns as reflected light to the coaxial incident lens 31 side. This reflected light is received by the camera 34.

  As described above, a structure in which the optical waveguide 33 and the coaxial incident lens 31 are combined with the light source 32 and the camera 34 may be used. Even in this case, as schematically shown in FIG. 9, the region where the reflected light is received is observed brightly, whereby the boundary between the bright region and the region where the hardly reflective plate 5 is located is It can be easily detected that the edge 2a of the translucent film 2 is present. Although not particularly illustrated, the boundary between the ceramic green sheet 3 and the conductor pattern 4 can also be easily detected by the brightness difference in the image.

  FIG.10 and FIG.11 is a figure for demonstrating the modification which detects the both ends edge of an elongate translucent film. As shown in FIGS. 8A and 8B, the translucent film 42 is disposed above the translucent film 42 so that the edges 42a and 42b of the long translucent film 42 can be detected. A light source 43 that irradiates light having a width larger than the dimension in the width direction is arranged. Further, below the translucent film 42, a difficult-to-reflect plate 44 larger than the width direction dimension of the translucent film 42 is disposed. The camera 45 is configured so as to be able to photograph a region having a dimension in the width direction larger than the edges 42a and 42b of the translucent film 42. Therefore, as shown in FIG. 11, in the image obtained from the camera 45, the entire part of the transversal film 42 in the width direction is displayed in the image. In the translucent film 42, since the light is reflected, the portion where the translucent film 42 is located is displayed brightly, and the outer sides of the edges 42a and 42b are displayed darkly due to the presence of the hardly reflective plate 5. The Therefore, the edges 42a and 42b can be easily detected by the brightness difference.

  In this manner, the light source and the camera may be set so that an image larger than the width-direction dimension of the translucent film is obtained, and thereby the edges on both sides of the translucent film may be detected.

  Moreover, in embodiment mentioned above, although the edge of the elongate translucent film was detected, you may detect the edge of the translucent film which is not elongate in this invention. That is, as shown in FIG. 12, in the structure in which a plurality of triangular translucent films 12 are arranged on the upper surface of the hardly reflective plate 5, the positions of the edges 52a to 52c of each translucent film 52 are set. It is also possible to detect.

  In this case, light is irradiated from the light source 53 above one triangular translucent film 52, and the irradiated light is irradiated so as to reach the inside and the outside of the edges 52a to 52c. And what is necessary is just to image | photograph the part containing the translucent film 52 with the camera 54. FIG. As a result, as shown in FIG. 13, in the obtained image, a portion where the translucent film 52 is present is observed brightly, so the positions of the edges 52 a to 52 c of the translucent film 52 are accurately detected. be able to.

  Alternatively, the area of light irradiated by the light source 53 may be widened, and the camera 54 may be used to photograph a portion where a plurality of translucent films 52 are present. In that case, the edges 52a to 52c of the plurality of translucent films 52 can be detected.

  In addition, in FIG. 12, although demonstrated about the method to detect the edges 52a-52c of the triangular translucent film 52, the area of the translucent film 52 is calculated | required easily by detecting the position of the edges 52a-52c. be able to. Therefore, according to the present invention, not only the detection of the edge of the translucent film but also the area of the translucent film can be obtained from the position of the obtained edge.

  In addition, the present invention can be used not only to detect the transparent film 52 having a triangular shape but also to detect a transparent edge having another planar shape such as a rectangle or a pentagon. Furthermore, the edge does not necessarily need to be a straight line, and the present invention can be used to detect a part of the edge of a translucent film such as a circle.

(A) is a fragmentary perspective view for demonstrating the principal part of the manufacturing apparatus of the multilayer ceramic electronic component which concerns on the 1st Embodiment of this invention, (b) is the image processing apparatus in 1st Embodiment. The schematic diagram which shows the image obtained. In the 1st Embodiment of this invention, the partial notch sectional drawing for demonstrating the process which irradiates light from the upper direction of a elongate composite sheet, and image | photographs with a camera. Front sectional drawing which shows the laminated body of the mother obtained by 1st Embodiment. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front sectional view showing a multilayer ceramic capacitor as a multilayer ceramic electronic component obtained in a first embodiment. (A) is sectional drawing which shows the process of irradiating light to a composite sheet in 1st Embodiment, (b) is side sectional drawing which shows the process of irradiating light from the upper direction of a composite sheet in 2nd Embodiment. . The schematic diagram which shows the image obtained by the image processing apparatus in 2nd Embodiment. The partial notch perspective view which shows the process of irradiating light from the upper direction of a composite sheet in 3rd Embodiment. The typical partial notch sectional view for demonstrating the process of irradiating light using the coaxial incident lens from the upper direction of a composite sheet in 3rd Embodiment, and receiving the reflected light. FIG. 10 is a schematic diagram illustrating an image obtained from an image processing apparatus according to a third embodiment. (A) is front sectional drawing for demonstrating the process of irradiating light from the upper direction of a translucent film in 4th Embodiment, (b) is the side sectional drawing. FIG. 10 is a schematic diagram illustrating an image obtained by an image processing apparatus according to a fourth embodiment. The perspective view for demonstrating the process of irradiating light to a translucent film in 4th Embodiment. FIG. 10 is a schematic diagram illustrating an image displayed by an image processing apparatus according to a fourth embodiment. (A) is a side view which shows an example of the edge detection method of the conventional translucent film, (b) is the front sectional drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Composite sheet 2 ... Translucent film 2a ... Edge 3 ... Ceramic green sheet 3a ... End edge 4 ... Conductor pattern 4a ... End edge 5 ... Difficult-reflective board 6 ... Light source 7 ... Camera (imaging device)
DESCRIPTION OF SYMBOLS 8 ... Image processing apparatus 9 ... Control apparatus 10 ... Film moving apparatus 26 ... Light source 29 ... Camera 31 ... Coaxial incident lens 32 ... Light source 33 ... Optical waveguide 42 ... Translucent film 42a, 42b ... Edge 43 ... Light source 44 ... Hard reflection 45 ... Camera 52 ... Translucent film 53 ... Light source 54 ... Camera

Claims (4)

A method for optically detecting an edge of a translucent film,
A light source is disposed on one side of the translucent film, and the translucent light is incident so that reflected light is incident when the light emitted from the light source is regularly reflected on the one side of the translucent film. An imaging device is disposed on the same side of the film as the side on which the light source is disposed, and the outer side of the surface of the translucent film opposite to the side on which the light source and the imaging device are disposed, A step of arranging a light-reflective member having a surface that is hard to regularly reflect light emitted from a light source as compared to the light-transmitting film;
Light is emitted from the light source toward the translucent film part inside the edge of the translucent film and the outer part of the edge, and the part including the edge of the translucent film is imaged by the imaging device. And a process of
A step of detecting a boundary between an area where the reflected light is observed and an area where the reflected light is not observed as an edge of the translucent film in an image taken by the imaging device. A method for detecting an edge of a translucent film, which is characterized. A ceramic green sheet is formed on a long translucent film, a composite sheet having a conductor pattern formed on the ceramic green sheet is prepared, and the composite sheet is arranged in the length direction of the translucent film. Each step of laminating a plurality of ceramic green sheets and conductor patterns cut out at a cutting station so that the ceramic green sheets and conductor patterns supported by the translucent film are cut out so as to have a predetermined planar shape A method for producing a multilayer ceramic electronic component comprising:
After the composite sheet is prepared, according to the edge detection method of the light transmissive film according to claim 1, the edge of the light transmissive film is detected, and in the image photographed by the imaging device, the light transmissive property is detected. Detecting the edge of the conductor pattern close to the edge of the film by the difference between the ceramic green sheet and the captured image of the conductor pattern;
When transporting the composite sheet to the cutting station, based on the distance between the edge of the translucent film and the edge of the conductor pattern, in the width direction of the translucent film upstream of the cutting station And a step of correcting the position. A method of manufacturing a multilayer ceramic electronic component. An apparatus for detecting an edge of a translucent film,
A light source disposed on one side of the translucent film and irradiating light on one side of the translucent film;
Reflected light after the light irradiated from the light source toward the translucent film is reflected on the translucent film surface, which is disposed on the same surface side as the side where the light source of the translucent film is disposed. An imaging device that receives the light and images an area including an edge portion of the translucent film;
The translucent film is disposed on a surface opposite to the side where the light source and the imaging device are disposed, and has a surface on which light from the light source is less likely to be regularly reflected compared to the translucent film. A non-reflective member;
An image processing device connected to the imaging device, processing an image obtained by the imaging device, and detecting an edge of the translucent film based on the image; Film edge detection device. A ceramic green sheet is formed on a long translucent film, and a composite sheet in which a conductor pattern is formed on the ceramic green sheet is prepared,
The composite sheet was conveyed in the length direction of the translucent film, and the ceramic green sheet and the conductor pattern supported by the translucent film were cut out and cut out at a cutting station so as to have a predetermined planar shape. An apparatus used for manufacturing a multilayer ceramic electronic component comprising each step of laminating a plurality of ceramic green sheets and conductor patterns,
The edge detection device of the translucent film according to claim 3,
Conveying means for conveying the composite sheet in the length direction of the translucent film;
On the upstream side of the cutting station, comprising a film moving means for moving the translucent film in the width direction in order to correct the width direction position of the translucent film,
The image processing device is configured to detect an edge of the translucent film and detect an outer edge of the conductor pattern based on an image photographed by the imaging device,
Based on the distance between the outer edge of the conductor pattern and the edge of the translucent film, a correction amount of the position in the width direction of the translucent film on the upstream side of the cutting station is obtained, and according to the correction amount A multilayer ceramic electronic component manufacturing apparatus, further comprising control means for driving the film moving means.

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