JP4680778B2 - Printing inspection method and printing apparatus - Google Patents

Description

The present invention relates to a method and a printing apparatus for efficiently inspecting a printed state after a mask sheet is overlaid on a substrate and a paste such as cream solder is printed on the substrate through an opening formed in the sheet. Is.

  Conventionally, while conveying a substrate (PWB) on which a circuit pattern is formed, first, a paste such as a cream solder or a conductive paste on the substrate is printed (printed) on a mounting location in a printing apparatus, and then a surface mounting machine (hereinafter, referred to as a surface mounting machine). In order to produce a substrate (PCB), components are sequentially mounted on the printed portion by a mounting machine).

For example, the printing apparatus places a mask sheet on a substrate set on a stage, and presses the paste supplied on the mask sheet with a squeegee, so that the printing device is placed at a predetermined position on the substrate through an opening formed in the mask sheet. It is configured to print a paste. Then, after printing, the printing state is inspected by recognizing the printing position (Patent Document 1). Also, instead of directly inspecting the printing state by recognizing the printing position in this way, for example, by recognizing each printing opening of the mask sheet after printing and inspecting its dirt and clogging state, Indirect inspection of the printing state is also performed.
Japanese Patent Laid-Open No. 11-17328

  By the way, in a printing apparatus, since a single mask sheet is placed on a substrate and the whole is subjected to a printing process, the printing state is always inspected regardless of the type of substrate, that is, all printing positions. The current situation is that inspections are being conducted. This also applies to the case where each printing opening of the mask sheet is imaged during the indirect inspection.

  On the other hand, in a so-called multi-sided substrate including a plurality of areas where the same circuit is formed, a mark is formed in the area for an area having a severe defect, and the mark is recognized by the mounting machine. Although it is possible to omit the mounting process, it is impossible for the printing apparatus to omit only the printing process for a part of the board. In general, all inspections are conducted without exception. Therefore, there is room for improvement in this respect.

  The present invention has been made in view of the above circumstances, and an object thereof is to increase the efficiency of the inspection by rationally proceeding with the print inspection after the paste is printed on the substrate.

In order to solve the above problems, the present invention provides a multi-substrate butt marks are formed on unnecessary defective area mounting parts of the plurality of these areas only chromatic One area which a circuit is formed which independently of one another As a substrate to be processed , a printing device for printing a paste on the substrate through a printing opening formed on the substrate by overlaying a mask sheet on the substrate, and a component on the substrate after printing by the printing device a printing test how in the printing device of the component mounting system comprising a surface mounter to implement, a data used for mounting processing of the substrate by the surface mounter, the mounting position of the component in the substrate Mounting position data that defines the mounting position data that defines which of the plurality of areas the mounting position of the component belongs to, and data that the printing apparatus has Then, based on the coordinate position data of the printing opening of the mask sheet and the mounting position data of the component, the coordinate position of the printing opening and the mounting position of the component are associated, and the result of this association and a step of creating an area data associated with each of said plurality and said printing apertures in the mask sheet area based on said mounting area data, a step of acquired presence information bat marks in the plurality of areas Using a camera provided in the printing apparatus so as to be movable relative to the substrate, and inspecting the printing state by imaging each printing position on the substrate by moving the camera; In the step of inspecting the printing state, the presence / absence information of the bat mark, the area data, and the coordinate position of the printing opening of the mask sheet Based on chromatography data, it is obtained so as to inspect the print state of the area by capturing only the print position in the area bat mark is not formed among the plurality of areas of the substrate (claim 1).

  If the inspection of the area where the mark is formed (the area where no parts are mounted) is omitted by using the information of the bat mark in this way, the existing information (bat mark) can be used for the time required for the print inspection. Can be rationally shortened.

In this method, for example, in the step of acquiring the presence information of the butt mark, that Tokusu preparative the existence information of the batt mark by imaging the coordinate position of the bat marks of the plurality of areas using the camera (Claim 2).

  If the bat mark is recognized using the camera for recognizing the printing state in this way, it is possible to acquire the presence / absence information of the bat mark using the existing equipment as it is.

On the other hand, indicia SuriSo location according to the present invention, a multi-substrate butt marks are formed on unnecessary defective area mounting parts of the plurality of these areas only chromatic One area which a circuit is formed which independently of one another As a substrate to be processed , a printing device for printing a paste on the substrate through a printing opening formed on the substrate by overlaying a mask sheet on the substrate, and a component on the substrate after printing by the printing device A printing apparatus incorporated in a component mounting system including a surface mounting machine for mounting a substrate, and a position of a substrate imaging camera movable relative to the substrate and a position of a printing opening of the mask sheet. Data storage means for storing mask-related data including defined coordinate position data, and an area for creating area data in which the mask sheet printing openings and the plurality of areas are associated with each other And over data create means controls the printing operation, after printing, by imaging the printing position on the substrate by the camera the camera drive control to the control unit for inspecting a printing state based on the imaging data , Data used for mounting a substrate by the surface mounter, mounting position data defining a mounting position of a component on the substrate, and which of the plurality of areas of the substrate the mounting position of the component belongs to Communication means for communicating information with an external device in order to obtain board-related data including mounting area data that defines the position of the bat mark and coordinate position data of the bat mark that defines the position on the substrate on which the bat mark is formed. The area data creation means acquires the substrate related data via the communication means, and stores the print data stored in the data storage means Based on the coordinate position data of the opening and the mounting position data, the coordinate position of the printing opening and the mounting position of the component are associated, and the area data is based on the result of the association and the mounting area data. The control means acquires the presence / absence information of the bat mark in each area based on the image data by causing the camera to image the coordinate position based on the coordinate position data of the bat mark, and the bat mark The plurality of the substrates by causing the camera to image only the print positions of the areas where the bat marks are not formed among the plurality of areas based on the presence / absence information, the area data, and the coordinate position data of the printing openings. Only the areas where no bat mark is formed are inspected for printing. (Claim 3).

According to this structure, when the substrate to be inspected is a multi-faced substrate, based on control by the control unit, pre-coordinate position of the bat mark is captured by the camera, the butt mark with the presence or absence of bar Ttomaku is image recognition An area where no exists is identified as an inspection target. In the inspection of the printing state, only the printing position included in the area where the bat mark does not exist is imaged by the camera. Therefore, in the printing apparatus, the inspection method according to claim 2 can be automated.

Another printing inspection method according to the present invention, multi-substrate in which the bat mark unnecessary defective area mounting parts of only a plurality of independent circuits are formed areas Yes One of these areas is formed with one another A substrate to be processed , a mask sheet overlaid on the substrate, and a printing device that prints a paste on the substrate through a printing opening formed on the substrate, and a substrate after printing by the printing device a printing test how in the printing device of the component mounting system comprising a surface mounter which mounts a component, a data used for mounting processing of the substrate by the surface mounter, the part of the substrate Obtaining a mounting position data defining a mounting position and mounting area data defining which of the plurality of areas the mounting position of the component belongs to; And associating the coordinate position of the printing opening with the mounting position of the component based on the coordinate position data of the printing opening of the mask sheet and the mounting position data of the component. results and a step of creating an area data associated with each of said plurality and said printing apertures in the mask sheet area based on said mounting area data, the step of acquired presence information bat marks in the plurality of areas And using a camera provided in the printing apparatus so as to be movable relative to the mask sheet, and moving the camera based on the coordinate position data of the printing opening, Including inspecting the printing state of the paste on the substrate indirectly by imaging each printing opening, and inspecting the printing state Existence information of the butt mark, based on the coordinate position data of the printing opening in the region data and the mask sheet, the batt mark among the plurality of areas of the printing openings in a by and the substrate of the mask sheet is obtained so as to image only the printing openings corresponding to not formed area (claim 4).

  That is, even when the mask sheet opening is imaged and the printed state on the substrate is inspected based on the image, the opening corresponding to the area where the mark is formed (the area where no part is mounted) using the bat mark information. By omitting the inspection, it is possible to rationally reduce the time required for the inspection by utilizing existing information (presence / absence of bat mark).

In this method, when the camera is the first camera, the second camera provided in the printing apparatus is different from the first camera and is movable relative to the substrate. It may be set to so that Tokusu preparative the existence information of the batt mark by imaging the coordinate position of the bat marks of the plurality of areas (claim 5).

It should be noted that “ the second camera provided in the printing apparatus so as to be movable relative to the substrate, different from the first camera” in claim 5 has two types of cameras. However, it is intended that each camera is provided so as to be movable relative to the substrate, and is not intended to be limited to that provided so that each camera can be individually moved with respect to the substrate. The same about).

On the other hand, another indicia SuriSo location according to the present invention, multi-panel independently to the circuit has a plurality of areas are formed and is butt mark unwanted defect area mounting parts of these areas are formed together A printing apparatus that uses a substrate as a substrate to be processed, and a mask sheet is overlaid on the substrate and prints a paste on the substrate through a printing opening formed on the substrate, and a substrate printed by the printing apparatus to a the printing device incorporated in the component mounting system comprising a surface mounting apparatus for mounting components, a first camera for the mask sheet recognition can be moved relative to the mask sheet relative to the substrate a second camera for board imaging relatively movable Te, a data storage means for storing mask-related data including coordinate position data defining a position of the printing apertures of said mask sheet, said Ma Area data creating means for creating area data in which the print opening of the sheet and the plurality of areas are associated with each other, and a printing operation are controlled, and after printing, the first camera is driven and controlled by the first camera. Control means for indirectly inspecting the printed state of the substrate based on the imaging data by imaging the printing opening of the mask sheet, and data used for the substrate mounting process by the surface mounter. Mounting position data defining the mounting position of the component on the substrate, mounting area data defining which of the plurality of areas of the substrate the mounting position of the component, and on the substrate on which the bat mark is formed Communication means for performing information communication with an external device to obtain board-related data including coordinate position data of a bat mark that defines a position; The area data creation means obtains the substrate related data via the communication means, and based on the coordinate position data of the printing opening and the mounting position data stored in the data storage means. perform association between the coordinate position and the component mounting position of the printing apertures, to create the area data based further on the the association result as the mounting area data, the control means, the coordinate position of the butt mark Based on the data, the coordinate position is captured by the second camera to obtain the presence / absence information of the bat mark in each area based on the image data, and the presence / absence information of the bat mark, the area data, and the printing opening On the basis of the coordinate position data of the mask sheet, and the bat mark has a shape. Only printing openings corresponding to areas that have not been made is to inspect areas only print when no butt marks are formed among the plurality of areas of the substrate by the imaging by the first camera (according Item 6).

According to this structure, when the substrate to be inspected is a multi-faced substrate, based on the control by the control means, prior to the coordinate position of the bat mark on the substrate is imaged by the second camera, the printing openings in the mask sheet printing openings belonging to the area where there is no bat mark is identified among. Then, during the inspection of the printed state, and only the printing opening corresponding to the area where there is no bat mark of printing apertures in the mask sheet is captured by the first camera. Therefore, in the printing apparatus, the inspection method according to claim 5 can be automated.

According to the printing inspection method and indicia SuriSo location according to the present invention, utilizing a butt mark formed on multi-faced substrate, skip inspection of printing conditions for the area where the mark is formed (the area where the component is not mounted) As a result, it is possible to rationally reduce the time required for the print inspection by utilizing the existing information (presence / absence of the bat mark). Therefore, a series of printing processes including the inspection of the printing state can be performed more efficiently, and as a result, the tact time can be shortened.

  A preferred embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 schematically shows a component mounting line. This line has a configuration in which a loader 1, a screen printing device 2, a first surface mounter 3, a second surface mounter 4, a third surface mounter 5, a reflow furnace 6 and an unloader 7 are arranged in series from the upstream side. It has become. The printed circuit board (hereinafter simply referred to as a board) is sequentially fed out from the loader 1 so that each process of solder paste printing, component mounting (mounting), and paste curing is sequentially performed on the board and taken out to the unloader 7. Yes. The present invention is applied to the screen printing apparatus 2 in this mounting line.

  Each of the devices 1 to 7 is an autonomous device provided with a control device, and each of the devices 1 to 7 is individually driven and controlled by its own control device. Further, the screen printing apparatus 2 and the surface mounters 3 to 5 are connected to the LAN 8, and various information relating to the production of the substrate can communicate with each other via the LAN 8. In the figure, reference numeral 9 denotes a server.

  2 and 3 schematically show the screen printing apparatus 2. FIG. 2 is a side view of a main part with the cover removed, and FIG. 3 shows the screen printing apparatus 2 in a front view.

  As shown in these drawings, a printing stage 13 is provided on a base 11 of a screen printing apparatus 2 (hereinafter abbreviated as a printing apparatus 2). The upstream conveyor 12A and the downstream conveyor 12C for loading and unloading the substrate P on the printing stage 13 are arranged along the transport line. In the following description, the conveyance direction of the board P by the conveyors 12A and 12C (the same as the conveyance direction of the board P in the component mounting system, that is, the arrangement direction of the devices 1 to 7) is the X-axis direction, and on the horizontal plane. In the following description, the direction orthogonal to the Y-axis direction and the direction orthogonal to both the X-axis and Y-axis directions are defined as the Z-axis direction.

  The printing stage 13 holds the substrate P and positions it from the lower side with respect to the mask sheet 35 to be described later, and is mainly composed of a main conveyor 12B, a lifting table 28, a clamp mechanism 14 and the like which will be described later. .

  The printing stage 13 is supported by a four-axis unit 20 and is moved to the X axis, the Y axis, the Z axis, and the R axis (rotation about the Z axis) by the operation of the unit 20.

  More specifically, a rail 21 is disposed on the base 11 along the Y-axis direction in a horizontal plane, and a Y-axis table 22 is slidably attached to the rail 21. A ball screw mechanism (not shown) provided on the base 11 is connected to the Y-axis table 22, and the Y-axis table 22 is moved in the Y-axis direction with respect to the base 11 by driving the ball screw mechanism. Is configured to move.

  A rail 23 is disposed on the Y-axis table 22 along the X-axis direction, and an X-axis table 24 is slidably attached to the rail 23. A ball screw mechanism (not shown) provided on the Y-axis table 22 is connected to the X-axis table 24, and the X-axis table 24 is driven with respect to the Y-axis table 22 by driving the ball screw mechanism. Configured to move in the direction.

  An R-axis table 26 is provided on the X-axis table 24 so as to be rotatable around a vertical line (Z-axis direction). The R-axis table 26 is Z with respect to the X-axis table 24 by driving means (not shown). It is designed to rotate around the axis.

  A slide column 27 is slidably attached to the R-axis table 26 along the vertical direction (Z-axis direction), and an elevation table 28 is attached to the upper portion of the slide column 27. A ball screw mechanism 29 is provided between the elevating table 28 and the R-axis table 26. The elevating table 28 is guided to the R-axis table 26 while being guided by the slide column 27 by driving the ball screw mechanism 29. It is configured to move in the Z-axis direction (vertical direction).

  Thus, the 4-axis unit 20 moves the printing stage 13 to the X axis, Y axis, Z axis, and R axis (rotation around the Z axis) by individually driving the tables 22, 24, 26, and 28. It is configured to let you.

  On the lifting table 28, a pair of main conveyors 12B are provided along the X-axis direction, and a clamp mechanism 14, a positioning mechanism 15, a placement table 30, and the like are provided. As described above, the printing stage 13 for holding the substrate P is constituted by the lifting table 28, the main conveyor 12B, and the like.

  The main conveyor 12B moves integrally with the lifting / lowering table 28, and the lifting / lowering table 28 is at a predetermined home position (a lower end position and predetermined in the X-axis, Y-axis, and R-axis directions). In the state set at the origin position), the upstream conveyor 12A and the downstream conveyor 12C are arranged in the X-axis direction. Then, when the elevating table 28 is set to the home position in this way, the substrate P is transferred from the upstream conveyor 12A to the printing stage 13 (main conveyor 12B), and the substrate P is transferred from the printing stage 13 to the downstream conveyor 12C. Is being carried out.

  The clamp mechanism 14 holds the substrate P in a fixed manner during the operation, and has a pair of clamp pieces 14a that can contact and separate in the Y-axis direction. The clamp pieces 14a sandwich the substrate P from both sides in the Y-axis direction. It is comprised so that it may fix. The clamp mechanism 14 uses an air cylinder as a drive source, and is configured to be switched between a clamped state in which the clamp pieces 14a approach each other and an unclamped state in which the clamp pieces 14a are separated from each other by the operation of the air cylinder. .

  Although not shown in detail, the positioning mechanism 15 positions the substrate P by restricting the bending of the substrate P and the like before the substrate P is clamped by the clamp mechanism 14.

  The mounting table 30 supports the substrate P by lifting the substrate P on the main conveyor 12B from below. The mounting table 30 is supported by the slide column 31 so as to be movable up and down on the lift table 28, and is connected to a ball screw mechanism (not shown) provided between the table 30 and the lift table 28. The ball screw mechanism is driven to move in the Z-axis direction (vertical direction) with respect to the lifting table 28.

  On the other hand, a mask holding unit 16, a squeegee unit 17, an imaging unit 18, a cleaner 19 and the like are disposed above the printing stage 13 and the like.

  The mask holding unit 16 holds the mask sheet 35. As shown in FIGS. 4 and 5, the mask holding unit 16 has mask support bases 36 fixed to a pair of elevated frames 40 supported on the base 11, and these mask support bases 36. The mask sheet 35 is clamped in a state where the mask sheet 35 is stretched horizontally above the printing stage 13 by a mask clamp 37 provided on the printing stage 13.

  The squeegee unit 17 expands while rolling (kneading) paste such as cream solder or conductive paste supplied onto the mask sheet 35 from a nozzle (not shown) on the mask sheet 35.

  The squeegee unit 17 is fixed on each frame 40 and has rails 41 extending in the Y-axis direction. The squeegee unit 17 is mounted so as to straddle the rails 41 and moves in the Y-axis direction by a driving mechanism (not shown). And a pair of squeegees 43, 43 for expanding the paste on the mask sheet 35, and an elevating mechanism provided on the beam 42 for individually raising and lowering the squeegees 43, 43. Is configured to expand the paste on the mask sheet 35 by sliding these squeegees 43 and 43 along the surface of the mask sheet 35 alternately while reciprocating in the Y-axis direction.

  The imaging unit 18 is for imaging the substrate P and the mask sheet 35 and is provided below the mask holding unit 16.

  The imaging unit 18 includes a camera head 50 integrally including a mask recognition camera 51 and a substrate recognition camera 52, and a drive mechanism that moves the camera head 50. The camera head 50 is moved in the X-axis direction and The mask sheet 35 and the substrate P are imaged by moving in a plane in the Y-axis direction.

  Specifically, a pair of rails 45 extending in the Y-axis direction are provided on the lower surface of each frame 40, and a beam 46 extending in the X-axis direction is movably mounted on the rails 45. A ball screw shaft 48 supported by the motor 47 and driven to rotate by a motor 47 is screwed into a nut portion of the beam 46 which is not shown. The beam 46 is provided with a pair of rails 49 extending in the X-axis direction. The camera head 50 is movably mounted on the rails 49, and a motor-driven ball screw shaft mounted on the beam 46 is not shown. The camera head 50 is screwed into a nut portion (not shown). That is, as the ball screw shafts rotate, the beam 46 moves in the Y-axis direction with respect to the frame 40, and the camera head 50 moves in the X-axis direction with respect to the beam 46, whereby the camera head 50 prints. The work area and the retreat area outside the work area are configured to move in a planar manner.

  The mask recognition camera 51 and the substrate recognition camera 52 are both composed of a CCD camera or the like equipped with an illumination device. Among these cameras, the mask recognition camera 51 captures a fiducial mark for position recognition provided on the lower surface of the mask sheet 35 and is provided upward. On the other hand, the substrate recognition camera 52 captures various marks such as fiducial marks for position recognition and bat marks provided on the substrate P, and at the time of inspection of the printed state of the substrate (print inspection), An image of the printing position is provided and is provided downward. Note that these cameras 51 and 52 are assembled to the camera head 50 in a vertically symmetrical positional relationship so that the optical axes are arranged coaxially, and thereby the objects at the same coordinate position on the XY coordinate plane can be simultaneously moved up and down. It can be taken.

  The cleaner 19 cleans the mask sheet 35 from the lower surface side as necessary, and is integrally attached to the beam 46 of the imaging unit 18.

  The cleaner 19 has a cleaning head 54 that is driven up and down by a driving mechanism (not shown). At the time of cleaning, the cleaning head 54 is set at the raised position, so that the head 46 is moved along with the movement of the beam 46. The mask sheet 35 is slidably brought into contact with the mask sheet 35 for cleaning. Although not shown in detail, the cleaning head 54 holds a roll around which the wiping paper is wound, and the wiping paper drawn out from this roll wipes off the mask sheet lower surface and the residual paste on the opening. It is configured as follows.

  FIG. 6 schematically shows a control system of the printing apparatus in a block diagram.

  The printing apparatus 2 is provided with a controller 60 that comprehensively controls the various units described above. The controller 60 stores a well-known CPU that executes logical operations, a ROM that stores various programs for controlling the CPU in advance, a RAM that temporarily stores various data during a printing operation, and various data and software. The main control means 61, print program storage means 62, actuator control means 63, external input / output means 64, communication means 65, image processing means 66, mask information storage means 67. And area data creating means 68 and the like.

  The main control means 61 performs a series of printing operations according to the printing program stored in the printing program storage means 62, that is, a series of operations from loading to unloading of the substrate P into the printing apparatus 2, and the squeegee unit 17 and the four axes. In addition to comprehensively controlling the driving of the unit 20 and the like, various arithmetic processes associated with the work are performed. In particular, at the time of a print inspection described later, the camera head 50 is driven and controlled to sequentially move the substrate recognition camera 52 to the printing position of the substrate P. If necessary, the substrate recognition camera is preceded by this print inspection. The camera head 50 is driven and controlled so as to image a butt mark described later on the substrate P by 52.

  The print program storage means 62 stores various programs related to print processing.

  The actuator control means 63 drives and controls various actuators such as a servo motor that drives the conveyors 12A to 12C, the four-axis unit 20, the squeegee unit 17 and the camera head 50, and a pneumatic cylinder that drives the squeegees 43 and 43. (In the illustrated example, only the servo motor 47 for driving the camera head 50 is shown). In this embodiment, the main control means 61, the actuator control means 63 and the like correspond to the control means according to the present invention.

  The external input / output means 64 controls signal input from various sensors 69 incorporated in the printing apparatus 2.

  The communication means 65 performs communication control with the server 9 and the respective surface mounters 3 to 5. When necessary, the communication means 65 controls information between the surface mounters 3 to 5 under the control of the communication means 65. Communication is to be performed. For example, in the case where the substrate to be processed P is a multi-planar substrate described later, an information request signal is transmitted to the surface mounters 3 to 5 via the communication means 65 and the LAN 8, thereby relating to the mounting process of the substrate P. Data, specifically parts-related data (part type, shape, dimensions, etc.) and board-related data (board type, part mounting position data, mounting area data, coordinates of various marks formed on the board Position data, shape data, etc.) is transmitted from the surface mounters 3 to 5 to the printing apparatus 2.

  The image processing means 66 performs predetermined image processing on the image data output from the mask recognition camera 51 and the substrate recognition camera 52. The main control means 61 is formed on the mask sheet 35 and the substrate P based on the image data. In addition to recognizing the various marks to be printed, the quality of the print state is determined based on the image data at the time of print inspection.

  The mask information storage means 67 stores information related to the mask sheet 35 (referred to as mask-related data). Specifically, the coordinate position data, the same shape data, the mask of each printing opening 35a of the mask sheet 35 are stored. Coordinate position data, shape data, and the like of various marks formed on the sheet 35 are stored. The main control means 61 is based on mask-related data stored in the storage means 65 at the time of print inspection. The camera head 50 is driven and controlled.

  The area data creation means 68 is a mask-related data stored in the mask information storage means 67 and a component transmitted from the surface mounters 3 to 5 via the LAN 8 when the substrate P to be processed is a multi-sided board. In addition, based on the substrate-related data, data (referred to as area data) that associates each printing opening 35a of the mask sheet 35 with each area of the substrate P is created.

  Here, the outline of the area data creation method by the area data creation means 68 will be described together with the configuration of the multi-sided substrate and the mask sheet 35 corresponding thereto.

  FIG. 7A schematically shows an example of a so-called multi-planar substrate P, and FIG. 7B schematically shows a mask sheet 35 corresponding to the substrate P.

  The multi-sided board P includes, for example, a plurality of areas (six areas E1 to E6 in the illustrated example) where the same circuit is formed, and paste printing and component mounting processing are performed as a single board. Thereafter, each of the areas E1 to E6 is separated and used individually. A pair of fiducial marks M1 (referred to as FID marks M1) for recognizing the position is formed on the substrate P, and each area E1 to E6 has a mounting accuracy by the surface mounters 3 to 5. Fiducial marks M2 (referred to as FID marks M2) for increasing are individually formed. Further, for areas E1 to E6 that have severe defects that cannot be mounted due to circuit damage or the like, the surface mounters 3 to 5 have a bat mark M3 for determining the area and omitting the mounting process. It is formed at a specific position in each of the areas E1 to E6. The bat mark M3 is formed only in the areas E1 to E6 having a defect. However, for convenience of explanation, the bat mark M3 is shown in which all the areas E1 to E6 are formed.

  On the other hand, the mask sheet 35 has printing openings 35a corresponding to the pattern of the multi-planar substrate P, that is, the printing positions (the white portions of the areas E1 to E6 shown in FIG. 7A), as shown in FIG. Is formed. A fiducial mark Ma (FID mark Ma) for position recognition is formed at the corner of the lower surface of the printing apparatus 25 (the surface facing the substrate P fixed to the printing stage 13).

  The area data creation means 68 is based on the mask related data stored in the mask information storage means 67 with respect to the mask sheet 35 as described above, and the component and board related data transmitted from each surface mounter 3-5. Create area data. Specifically, each printing is performed as shown in FIG. 8 based on the coordinate position data and shape (dimension) data of the printing opening 35a of the mask sheet 35 and the component mounting position data and component (shape, dimension) data. The overlapping state of the opening for printing 35a and the part C is virtually obtained, and those overlapping each other are examined, and based on the result, the coordinate position of the printing opening 35a and the mounting position of the part are associated (linked). That is, since the coordinate position of the printing opening 35a and the mounting position on the substrate P correspond to each other, the relationship between the printing opening 35a and the component mounting position is specified by examining the overlapping state as described above. Can do. After this association, based on the mounting area data included in the board-related data, that is, data defining which area E1 to E6 the component mounting position belongs to, the coordinate position of each printing opening 35a and the area E1 To E6, and this data (area data) is stored.

  That is, in this printing apparatus 2, as will be described in detail later, print inspection is performed in area units. However, since the printing apparatus 2 has only the coordinate position data of each printing opening of the mask sheet 35, Although the printing position on the substrate P can be obtained from the coordinate position data of the printing opening 35a, which area E1 to E6 includes each printing position on the substrate P has information on the areas E1 to E6. I can't ask for it. Accordingly, by transferring the component and board related data from the surface mounters 3 to 5 as described above, each printing opening 35a of the mask sheet 35 is based on these data and the mask related data of the printing apparatus 2. The area data is created by examining the correspondence between the areas E1 to E6.

As will be described later, the main control means 61 performs a print position to be inspected based on the recognition result of the bat mark M3 and the area data created by the area data creation means 68 in the print inspection. Is to identify .

  Next, the printing operation control of the substrate P by the controller 60 will be described with reference to the flowchart of FIG.

  When production is started in the printing apparatus 2, first, the upstream conveyor 12A is driven, and the substrate P is carried from the loader 1 onto the printing stage 13 and fixed (step S1). At this time, the printing stage 13 is previously set at the home position (the lift table 28 in the four-axis unit 20 is set at the lower end position and set at predetermined origin positions in the X-axis, Y-axis, and R-axis directions). It is assumed that it is set to. The substrate P is fixed on the printing stage 13 by first lifting the mounting table 30 to lift the substrate P carried into the main conveyor 12 </ b> B, and positioning the substrate P by the positioning mechanism 15 while clamping the substrate P by the clamping mechanism 14. This is done by sandwiching P.

  Next, the camera head 50 is moved from a predetermined home position outside the printing work area to above the printing stage 13, and the coordinate position of the FID mark M 1 of the substrate P is sequentially imaged by the substrate recognition camera 52 and masked by the mask recognition camera 51. The FID mark Ma on the sheet 35 is imaged and recognized (step S2). Note that the FID mark Ma of the mask sheet 35 may be imaged only immediately after replacement of the mask sheet 35 due to, for example, a change in the type of the substrate P.

  When the recognition of the marks M1 and Ma is completed, the camera head 50 is reset to the home position, and the 4-axis unit 20 is operated to raise the substrate P integrally with the printing stage 13, thereby lowering the mask sheet 35. The substrate P is loaded from the side (step S3). At this time, the main control means 61 obtains a relative positional relationship between the mask sheet 35 and the substrate P based on the recognition results of the marks Ma and M1 in step S2, and drive-controls the 4-axis unit 20 and the like based on this positional relationship. By doing so, the substrate P is positioned with respect to the mask sheet 35.

  Further, in parallel with this heavy loading operation, the squeegees 43 and 43 of the squeegee unit 17 are moved to a predetermined printing start position, and one squeegee 43 is lowered and brought into contact with the surface of the mask sheet 35 to complete this operation. Then, after supplying the solder paste onto the mask sheet 35 by a supply device (not shown), the squeegee 43 is moved in the Y-axis direction to expand the paste (step S4). As a result, the paste is printed (applied) at a predetermined position of the substrate P through the printing opening 35a of the mask sheet 35.

  When the printing operation on the substrate P is completed, the substrate P is detached from the mask sheet 35 by lowering the printing stage 13 by a small amount (plate separation), and promptly reset to the home position (step S5).

  Next, it is determined whether or not the substrate to be processed is a multi-planar substrate P. If NO is determined here, a print inspection by image recognition is performed on all print positions on the substrate P (step S20). Specifically, the camera head 50 is driven, and the printing position is imaged while the board recognition camera 52 is sequentially moved to each printing position on the board P. At this time, the movement control of the substrate recognition camera 52 is performed based on the coordinate position data of the printing opening 35 a of the mask sheet 35 stored in the mask information storage unit 67. The driving of the camera head 50 is controlled using the data of the mask sheet 35 in this way, as described above, the printing position on the substrate P corresponds to the position of each printing opening 35a of the mask sheet 35. Therefore, it is possible to use the coordinate position data of the printing opening 35a as it is, and it is rational because the data can be shared.

  On the other hand, if “YES” is determined in the step S6, it is determined whether or not there is recognition result data of the bat mark M3. For example, if image recognition of the bat mark M3 is performed in the upper process device of the printing apparatus 2 and the recognition result data has already been acquired via the LAN 8, it is determined as YES in step S6. However, in this embodiment, since the loader 1 is arranged in the upper process of the printing apparatus 2 and the image recognition of the bat mark M3 is impossible (refer to FIG. 1), it is always determined NO and the process proceeds to step S8. Transition.

  In step S8, the camera head 50 is driven, the substrate recognition camera 52 is sequentially moved to the coordinate position of each bat mark M3 of the multi-sided board P, and the position is imaged. Based on the image data, the bats in the areas E1 to E6 are captured. The presence or absence of the mark M3 is determined. At this time, movement control of the board recognition camera 52 is performed based on board related data (coordinate position data of the bat mark M3) transferred from the surface mounters 3 to 5 via the LAN 8.

  Next, based on the recognition result of the bat mark M3, the main control means 61 identifies the areas E1 to E6 where the bat mark M3 is formed, and further sets an initial value “1” to the area counter that identifies the areas E1 to E6. (Step S9). If YES is determined in step S7, the recognition result data of the bat mark M3 is read (step S15), and the areas E1 to E6 where the bat mark M3 is formed are specified based on the data.

  Then, it is determined whether or not the print inspection of the area (for example, area E1) corresponding to the counter value n of the area counter is performed, that is, whether or not the bat mark M3 is formed in the area E1 (step S10). If YES is determined here, the camera head 50 is driven, and the print position is imaged while the substrate recognition camera 52 is sequentially moved to each print position included in the area E1 (step S11). At this time, the main control means 61 specifies the print position included in the area E1 based on the coordinate position data of each printing opening 35a of the mask sheet 35 and the area data created by the area data creation means 68, and The camera head 50 is driven and controlled based on the specific result. As a result, each print position in the area E1 is recognized as an image. The reason why the driving of the camera head 50 is controlled using the data of the mask sheet 35 in the print inspection of the multi-sided substrate P in this way is the same as the reason described in the process of step S20.

  When imaging of each printing position in the area E1 is completed, it is then determined whether or not the value of the area counter is the total area number N (“6” in the present embodiment) of the multi-sided substrate P (step S12). If NO is determined, the counter value of the area counter is incremented by “1” (step S16), and then the process returns to step S10, so that the print inspection is executed for the next area (for example, area E2). Make a decision. If NO is determined in step S10, the process proceeds to step S16 and the counter value of the area counter is incremented by “1”.

  Thus, finally, when YES is determined in step S12, that is, when imaging of each printing position by the substrate recognition camera 52 is completed for all the areas E1 to E6 where the bat mark M3 is not formed, the main control is performed based on the image data. The means 61 determines whether or not the printing state is acceptable (step S13). If YES, that is, if it is determined to pass, the substrate P of the printing stage 13 is released and the conveyors 12B and 12C are driven. The board P is unloaded from the printing apparatus 2 (step S14), and the printing process for the series of boards P is completed.

  On the other hand, if NO is determined in step S13, that is, if a printing failure is found at any of the picked-up printing positions, the notifying means (not shown) is operated to let the operator know the position of the printing failure and its state (level). And visual confirmation (good / bad determination) by the operator is performed (step S17). If it is determined that the operator's determination result is acceptable (YES in step S18), specifically, the operator determines that the result is acceptable by visual confirmation, and an input to continue the process is made by operating the input means (not shown). If so, the process moves to step S14 and the substrate P is unloaded. On the other hand, when it is determined that the operator's determination result is unacceptable (NO in step S18), specifically, when the operator determines that the result is unsuccessful by visual confirmation and an operation stop is input by operating the input means. In this case, an instruction for removing the substrate P is displayed on a display device (not shown), and the operator removes the substrate P by manual operation according to this display (step S19), thereby completing a series of printing processes.

  As described above, in the printing apparatus 2 according to the present invention, after the printing process, each printing position is imaged by the board recognition camera 52 and the printing state is inspected. Regarding the inspection of the so-called multi-sided board P, As described above, presence / absence information of the bat mark M3 is acquired in advance by imaging the coordinate position of the bat mark M3 in each of the areas E1 to E6 by the substrate recognition camera 52, and the bat mark M3 is formed based on the presence / absence information. The areas E1 to E6 that are not present are specified, and only this specific area E1 to E6 is subjected to the main inspection, that is, the printing position is imaged by the substrate recognition camera 52, and the printing state is inspected. In the mounting machines 3 to 5, it is possible to omit the inspection of the printing positions in the areas E1 to E6 where no components are mounted. Therefore, the print inspection can be efficiently performed as compared with the conventional apparatus (inspection method) of this type that recognizes all the printing positions uniformly. In particular, the printing apparatus 2 of the above embodiment consistently performs from the printing process to the print inspection (in other words, the inspection apparatus that inspects the printing state is integrally incorporated). Thus, the throughput of the printing apparatus 2 can be improved by increasing the efficiency of the print inspection.

  The component mounting system described above is an application example of a screen printing apparatus (a screen printing apparatus to which the printing inspection method according to the present invention is applied) incorporating the printing inspection apparatus according to the present invention. The configuration, for example, the specific configuration of the screen printing apparatus and the specific print inspection method can be appropriately changed without departing from the gist of the present invention. For example, it is possible to adopt the following aspects.

  (1) In the printing apparatus 2 according to the embodiment, after the printing process as described above, a printing position on the substrate P is imaged by the substrate recognition camera 52, and a so-called direct inspection is performed based on the image data. For example, a so-called indirect inspection is performed in which the printing opening 35a of the mask sheet 35 is imaged by the mask recognition camera 51 and the printing state on the substrate P is indirectly inspected by recognizing the state. You may make it implement. That is, the actual printing state on the substrate P and the state of the printing opening 35a immediately after printing are closely related, and the printing state can be detected by recognizing the image of the printing opening 35a. Therefore, such indirect inspection may be performed in the printing apparatus 2 described above.

  In this case, the printing operation control by the controller 60 basically follows the flowchart of FIG. 9, but in steps S9 to S12 and S15 in the case of indirect inspection control, positions corresponding to the printing openings 35a of the mask sheet 35. The printing aperture 35a may be imaged while the mask recognition camera 51 is sequentially moved. In particular, in steps S10 and 11, the main control means 61 should take an image based on the recognition result of the bat mark M3 acquired in step S8 (S15) and the area data created by the area data creation means 68. The printing opening 35a is specified (the printing opening 35a corresponding to the areas E1 to E6 where the bat mark M3 does not exist is specified), and the camera head 50 may be driven and controlled based on the specifying result. In step S13, the main control means 61 may perform pass / fail judgment of the printing state on the substrate P based on the image data of the printing opening 35a captured by the mask recognition camera 51. Even when such an indirect inspection is performed, the main control means 61, the area data creation means 68, and the like correspond to the specifying means according to the present invention. The mask recognition camera 51 corresponds to the first camera according to the present invention, and the mask recognition camera 52 corresponds to the second camera according to the present invention.

  (2) In the printing apparatus 2 of the embodiment, by transferring board related data (coordinate position data of the bat mark M3, component mounting area data, etc.) from the surface mounters 3-5 to the printing apparatus 2 via the LAN 8, Although the bat mark M3 is recognized based on the data and the print inspection associated with the areas E1 to E6 is performed, of course, the substrate related data may be stored in the printing apparatus 2 in advance.

  (3) In the printing apparatus 2 of the embodiment, the printing apparatus 2 integrally has a print inspection function for inspecting the printing state of the substrate P. That is, the printing inspection apparatus is integrated into the printing apparatus 2. However, for example, a dedicated print inspection apparatus having a camera that can move relative to the substrate may be interposed between the printing apparatus 2 and the first surface mounter 3. In this case, if this print inspection apparatus performs a print inspection in units of areas according to the presence or absence of the bat mark M3 in accordance with the control as described above (steps S1, S6 to S20 in FIG. 9). Good.

1 is a schematic front view showing an example of a component mounting system to which the present invention is applied. 1 is a side view illustrating an example of a screen printing apparatus (a screen printing apparatus in which a printing inspection method according to the present invention is implemented) in which a printing inspection apparatus according to the present invention is incorporated. It is a front view which shows a screen printing apparatus. It is a perspective view which shows a screen printing apparatus. It is a perspective view which shows the part of the imaging unit and cleaner of a screen printing apparatus. It is a block diagram which shows the control system of a screen printing apparatus. (A) is a top view which shows an example of a structure of a multi-sided board | substrate, (b) is a top view which shows the mask sheet corresponding to the multi-sided board | substrate shown to (a). It is a conceptual diagram for demonstrating the creation method of the area data by an area data creation means. It is a flowchart figure which shows an example of the printing operation control in a screen printing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Loader 2 Screen printing device 3 1st surface mounting machine 4 2nd surface mounting machine 5 3rd surface mounting machine 6 Reflow furnace 7 Unloader 50 Camera head 51 Mask recognition camera 52 Board recognition camera 60 Controller 61 Main control means 62 Print program memory | storage Means 63 Actuator control means 64 External input / output means 65 Communication means 66 Image processing means 67 Mask information storage means 68 Area data creation means P Printed circuit board / multiple substrate

Claims (6)

The multi-substrate butt marks are formed on unnecessary defective area mounting parts of the plurality of these areas only chromatic One area which a circuit is formed which independently of one another as the target substrate, the heavy mask sheet to the substrate A component mounting system comprising: a printing device that prints a paste on the substrate through a printing opening formed on the substrate; and a surface mounter that mounts a component on the substrate after printing by the printing device a printing test how in the printing apparatus,
Data used for board mounting processing by the surface mounter, wherein the mounting position data that determines the mounting position of the component on the board and which of the plurality of areas the mounting position of the component belongs to A process of obtaining the mounting area data;
A printing apparatus is a data, and based on the coordinate position data of the printing opening portion of the mask sheet and the mounting position data of the component, the coordinate position of the printing opening portion and the mounting position of the component are associated, A step of creating area data associating the printing openings of the mask sheet with the plurality of areas based on the result of the association and the mounting area data;
A step of acquired presence information bat marks in the plurality of areas,
Using a camera provided in the printing apparatus so as to be movable relative to the substrate, and inspecting the printing state by moving the camera and imaging each printing position on the substrate; Including
In the step of inspecting the printing state, the bat mark is not formed among the plurality of areas of the substrate based on the presence / absence information of the bat mark, the area data, and the coordinate position data of the printing opening of the mask sheet. A printing inspection method, wherein only a printing position in an area is imaged to inspect a printing state of the area . The printing inspection method according to claim 1,
In the step of acquiring the presence information of the butt mark, print inspection, wherein Rukoto Tokusu preparative the existence information of the batt mark by imaging the coordinate position of the bat marks of the plurality of areas using the camera Method. The multi-substrate butt marks are formed on unnecessary defective area mounting parts of the plurality of these areas only chromatic One area which a circuit is formed which independently of one another as the target substrate, the heavy mask sheet to the substrate A component mounting system comprising: a printing device that prints a paste on the substrate through a printing opening formed on the substrate; and a surface mounter that mounts a component on the substrate after printing by the printing device The printing device incorporated in
A camera for board imaging that is movable relative to the board;
Data storage means for storing mask-related data including coordinate position data defining the position of the printing opening of the mask sheet;
Area data creating means for creating area data associating the plurality of areas with the printing openings of the mask sheet;
Control means for controlling the printing operation and, after printing, driving the camera to inspect the printing state based on the imaging data by causing the camera to image the printing position on the substrate;
Data used for mounting a substrate by the surface mounter, mounting position data defining a mounting position of a component on the substrate, and which of the plurality of areas of the substrate the mounting position of the component belongs to Communication means for performing information communication with an external device to obtain board-related data including predetermined mounting area data and coordinate position data of a bat mark that defines a position on the board on which the bat mark is formed. ,
The area data creation means acquires the substrate-related data via the communication means, and prints based on the coordinate position data of the printing opening and the mounting position data stored in the data storage means. Perform the association between the coordinate position of the opening and the mounting position of the component, and further create the area data based on the result of this association and the mounting area data,
The control means acquires the presence / absence information of the bat mark in each area based on the image data by causing the camera to take an image of the coordinate position based on the coordinate position data of the bat mark, Based on the area data and the coordinate position data of the printing opening, only the printing position of the area where the bat mark is not formed among the plurality of areas is imaged by the camera. A printing apparatus for inspecting a printing state only in an area where a bat mark is not formed . The multi-substrate butt marks are formed on unnecessary defective area mounting parts of the plurality of these areas only chromatic One area which a circuit is formed which independently of one another as the target substrate, the heavy mask sheet to the substrate Component mounting comprising: a printing device that prints a paste on the substrate through a printing opening formed on the substrate; and a surface mounter that mounts the component on the substrate after printing by the printing device a printing test how in the printing device of the system,
Data used for board mounting processing by the surface mounter, wherein the mounting position data that determines the mounting position of the component on the board and which of the plurality of areas the mounting position of the component belongs to A process of obtaining the mounting area data;
A printing apparatus is a data, and based on the coordinate position data of the printing opening portion of the mask sheet and the mounting position data of the component, the coordinate position of the printing opening portion and the mounting position of the component are associated, A step of creating area data associating the printing openings of the mask sheet with the plurality of areas based on the result of the association and the mounting area data;
A step of acquired presence information bat marks in the plurality of areas,
Each printing of the mask sheet is performed by moving the camera based on the coordinate position data of the printing opening using a camera provided in the printing apparatus so as to be movable relative to the mask sheet. And indirectly inspecting the printing state of the paste on the substrate by imaging the opening for use,
In the step of inspecting the printing state, based on the presence / absence information of the bat mark, the area data, and the coordinate position data of the printing opening of the mask sheet, the printing opening of the mask sheet and the substrate printing inspection method characterized by imaging only printing opening corresponding to an area not formed the batt mark among the plurality of areas. The print inspection method according to claim 4,
When the camera is a first camera, a second camera provided in the printing apparatus, which is different from the first camera and is movable relative to the substrate, is used for the plurality of areas . printing inspection method according to claim Rukoto Tokusu preparative the existence information of the batt mark by imaging the coordinate position of the bat mark. A multi-sided substrate having a plurality of areas in which circuits independent from each other are formed and in which a bat mark is formed in a defective area that does not require component mounting is used as a substrate to be processed, and a mask sheet is overlapped on the substrate. Component mounting comprising: a printing device that prints a paste on the substrate through a printing opening formed on the substrate; and a surface mounter that mounts the component on the substrate after printing by the printing device a the printing device incorporated in the system,
A mask first camera for sheet recognition can be moved relative to the mask sheet,
A second camera for board imaging relatively movable with respect to the substrate,
Data storage means for storing mask-related data including coordinate position data defining the position of the printing opening of the mask sheet;
Area data creating means for creating area data associating the plurality of areas with the printing openings of the mask sheet;
In addition to controlling the printing operation, after printing, the first camera is driven and controlled, and the first camera is used to image the printing opening of the mask sheet, so that the printing state of the substrate is indirectly based on the imaging data. Control means for inspecting automatically,
Data used for mounting a substrate by the surface mounter, mounting position data defining a mounting position of a component on the substrate, and which of the plurality of areas of the substrate the mounting position of the component belongs to Communication means for performing information communication with an external device to obtain board-related data including predetermined mounting area data and coordinate position data of a bat mark that defines a position on the board on which the bat mark is formed. ,
The area data creation means acquires the substrate-related data via the communication means, and prints based on the coordinate position data of the printing opening and the mounting position data stored in the data storage means. Perform the association between the coordinate position of the opening and the mounting position of the component, and further create the area data based on the result of this association and the mounting area data,
The control means acquires the presence / absence information of the bat mark in each area based on the image data by causing the second camera to take an image of the coordinate position based on the coordinate position data of the bat mark. Based on the information, the area data, and the coordinate position data of the printing opening , only the printing opening corresponding to the area that is the printing opening of the mask sheet and the bat mark is not formed is described above. A printing apparatus that inspects a printing state only in an area where a bat mark is not formed among a plurality of areas of the substrate by imaging with a first camera .

Images