JP2013000906A - Electronic component mounting system, and manufacturing method for mounting substrate in electronic component mounting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic component mounting system and a manufacturing method for a mounting substrate in the electronic component mounting system which reduce shifts between the positions of solder paste printed on discrete substrates and the mounting positions of components even when the components are mounted on a multiple substrate composed of the discrete substrates.SOLUTION: To determine a plurality of print target positions at which paste is to be printed on electrodes 43 in a substrate 4 are determined, based on a recognition result obtained by recognizing mask recognition marks 22a and substrate recognition marks 4a prior to a screen print process and based on mounting position data, the substrate 4 is aligned with a screen mask 22 so that a degree of approximate matching of a plurality of pattern holes 22b to the plurality of print target positions based on the recognition result of the mask recognition marks 22a and print position data is maximized under a condition that an element substrate 42* with a bad mark BM detected thereon is excluded.

Description

  The present invention relates to an electronic component mounting system for manufacturing a mounting substrate by mounting electronic components on a substrate, and a mounting substrate manufacturing method in the electronic component mounting system.

  An electronic component mounting system that manufactures a mounting substrate by mounting electronic components on a substrate by solder bonding is a printing device that prints a solder paste for component bonding on a substrate electrode, and the electronic component is mounted on a substrate on which the solder paste is printed A plurality of electronic component mounting devices, such as an electronic component mounting device that performs such processing and a reflow device that melts and solidifies solder paste, are connected. In such an electronic component mounting system, with the recent miniaturization of electronic components and the increase in mounting density, the positional accuracy required when mounting electronic components on a substrate has also been advanced. That is, it is required to secure the printing position accuracy when the solder paste is printed on the electrode position in the printing apparatus and the mounting position accuracy when mounting the electronic component on the solder paste on the printed board at a high level. For this reason, as a printing apparatus, a configuration for the purpose of accurately aligning the substrate and the screen mask is known (see Patent Document 1).

  In the prior art example shown in Patent Document 1, a recognition device having a configuration in which two recognition means are arranged in parallel in the horizontal direction is positioned between the screen mask and the substrate, thereby simultaneously recognizing the substrate and the screen mask. An example is shown in which the vertical movement stroke at the time of mask alignment is reduced to minimize the displacement error generated during the alignment operation.

JP 2007-130910 A

  However, in the prior art including the above-described prior art examples, the following problems have occurred when aligning the substrate and the screen mask. In other words, conventionally, as the position reference when aligning the substrate and the screen mask, the center of the substrate is made to coincide with the center position of the screen mask. When expansion / contraction due to deformation or the like occurs, the pattern of the screen mask that hardly undergoes expansion / contraction deformation and the electrode of the substrate do not coincide with each other in the peripheral region of the substrate, resulting in misalignment. When screen printing is executed in such a state, the solder paste is printed on the substrate while being displaced from the electrodes.

  The board that is the target of component mounting is provided with a plurality of recognition marks associated with the positions of the component mounting points, and in the component mounting process, each recognition mark is captured and recognized based on the recognition result. Mounting position data serving as a target position when mounting an electronic component on a component mounting point is calculated. Since the position of the recognition mark is similarly displaced when the substrate is expanded and contracted as described above, the mounting position data calculated based on the recognition result of the recognition mark is the displacement accompanying the expansion and contraction of the substrate. The minutes are corrected.

  Therefore, the position of the solder paste printed by the screen mask pattern does not coincide with the corrected component mounting position corrected by the recognition mark recognition, and the electronic component after mounting is out of position from the solder paste. Become. If the amount of misregistration generated in this way becomes excessive, a joining failure such as “part standing” or “bridge” occurs due to an imbalance of the surface tension of the molten solder in the reflow process. In order to prevent such problems as much as possible, the position at the time of alignment between the substrate and the screen mask is such that the screen mask pattern and the corrected component mounting position corrected by recognition of the recognition mark match as much as possible. It is desirable to make corrections.

  By the way, there is a multi-sided board on which a plurality of individual boards are formed as a board for mounting components. These multi-sided substrates are inspected in advance for each individual substrate in the substrate inspection in the previous process, and a bad mark indicating that it is not necessary to make it a work target in the subsequent process on each individual substrate determined to be a defective substrate It is formed. The individual substrates in which the bad mark is detected in the subsequent processes are excluded from the work target. However, in the screen printing, the printing operation is collectively performed on the entire multi-sided substrate. In the alignment of the substrate and the screen mask, the land of the individual substrate to which the bad mark is attached is also the object of alignment.

  If a land with a bad mark is misaligned from the normal position, position correction is performed including the land in the misaligned state. Therefore, an appropriate position correction result is not always obtained. As a result, the required alignment accuracy is lowered. As described above, in the conventional technique, when a multi-sided board on which a plurality of individual boards are formed is targeted, a position shift occurs between the position of the solder paste printed on each individual board and the component mounting position. There was a problem that a defect might occur.

  Therefore, the present invention reduces misalignment between the position of the solder paste printed on each individual substrate and the component mounting position even when the target is a multi-sided substrate on which a plurality of individual substrates are formed. It is an object of the present invention to provide an electronic component mounting system and a mounting board manufacturing method in the electronic component mounting system.

  An electronic component mounting system according to the present invention is configured by connecting a plurality of electronic component mounting apparatuses, and mounting the electronic component on a multi-sided substrate on which a plurality of individual substrates are formed to manufacture the mounting substrate. In the mounting system, the electronic component mounting apparatus picks up an electronic component by a mounting head from a component supply unit and a screen printing device that prints a paste for bonding the component on the electrode formed on the individual substrate. An electronic component mounting device mounted on an individual substrate on which the paste is printed, and the screen printing device is formed on the screen mask by sliding a squeegee on the screen mask supplied with the paste. A screen printing mechanism for printing a paste on each individual substrate of the substrate that is positioned and held in the substrate positioning portion via the patterned hole; The first mark recognition means for recognizing the mask recognition mark formed on the screen mask and the position reference mark formed on the substrate, and the individual substrate formed on the individual substrate requires execution of work in a later process. A first bad mark detecting means for detecting the presence or absence of a bad mark indicating a defective substrate, and the substrate positioning unit based on a recognition result of the first mark recognizing means, thereby controlling the screen. A positioning control unit for positioning the substrate with respect to the mask, and the electronic component mounting apparatus mounts the electronic component on the component mounting position of the individual substrate on which the paste is printed by the mounting head. A mechanism, a second mark recognition means for recognizing a substrate recognition mark formed on the individual substrate, and detecting the presence or absence of the bad mark First bad mark detection means, and a mounting control section for mounting the electronic component at the component mounting position by controlling the component mounting mechanism based on the recognition result of the second mark recognition means. Further, reference data used in the alignment of the substrate, the printing position data indicating the positional relationship between the pattern hole arrangement and the mask recognition mark, and the position of the component mounting point on the substrate and the position reference mark And a data storage unit for storing the mounting position data indicating the positional relationship for each board type, and the alignment control unit is based on the recognition result of the position reference mark by the first mark recognition unit and the mounting position data. A plurality of print target positions on which the paste is to be printed on the substrate, and then the recognition result of the mask recognition mark and the previous The degree to which the plurality of pattern holes approximately match the plurality of print target positions based on the printing position data is a condition that excludes individual substrates from which the bad mark is detected among the plurality of individual substrates. The board is aligned so as to be a maximum at the bottom, and the mounting controller excludes the individual board from which the bad mark is detected, and the component mounting is performed based on the recognition result of the second mark recognition means. The component mounting position is obtained by correcting the position of the point according to a predetermined position correction algorithm.

  A method for manufacturing a mounting board in an electronic component mounting system according to the present invention is configured by connecting a plurality of electronic component mounting apparatuses and mounting the electronic component on a multi-sided board on which a plurality of individual boards are formed. A method of manufacturing a mounting board in an electronic component mounting system for manufacturing a board, wherein the electronic component mounting apparatus includes a screen printing apparatus that prints a component bonding paste on an electrode formed on the individual substrate; An electronic component mounting device that picks up an electronic component from a component supply unit by a mounting head and mounts the electronic component on a printed circuit board on which the paste is printed, and the screen printing device displays a squeegee on the screen mask supplied with the paste. By sliding, the substrate positioned and held by the substrate positioning portion through the pattern hole formed in the screen mask Prior to a screen printing process for printing a paste on an individual substrate, a first mark recognition process for recognizing a mask recognition mark formed on the screen mask and a position reference mark formed on the substrate, and the individual substrate Obtained in a first bad mark detection step for detecting the presence or absence of a bad mark indicating that the individual substrate is a defective substrate that does not require execution of work in a subsequent step, and the first mark recognition step. And an alignment control step of aligning the substrate with respect to the screen mask by controlling the substrate positioning unit based on the recognition result, and the electronic component mounting apparatus is configured to perform the electronic component using the mounting head. Prior to the component mounting step of mounting the paste at the component mounting position of the individual substrate on which the paste is printed. The second mark recognition step for recognizing the board recognition mark and the second bad mark detection step for detecting the bad mark are performed, and the recognition obtained in the second mark recognition step in the component mounting step. By controlling the component mounting mechanism based on the result, the electronic component is mounted at the component mounting position, and the electronic component mounting system is reference data used in alignment of the board, and the pattern Data storage for storing, for each board type, printing position data indicating the positional relationship between the array of holes and the mask recognition mark, and mounting position data indicating the positional relationship between the position of the component mounting point on the substrate and the position reference mark A position reference mark recognition result and mounting in the first mark recognition step in the alignment control step A plurality of print target positions for printing the paste on the substrate are obtained based on the position data, and then a plurality of pattern holes are formed at the plurality of print target positions based on the recognition result of the mask recognition mark and the print position data. In the component mounting step, the substrate is aligned so that the degree of the approximate matching is maximized under the condition of excluding the individual substrate from which the bad mark is detected among the plurality of individual substrates. The component mounting position is corrected by correcting the position of the component mounting point according to a predetermined position correction algorithm based on the recognition result in the second mark recognition step, excluding the individual board from which the bad mark is detected. Ask for.

  According to the present invention, the paste should be printed on the substrate based on the recognition result and the mounting position data obtained in the first mark recognition step for recognizing the mask recognition mark and the substrate recognition mark prior to the screen printing step. When obtaining a plurality of print target positions, the individual substrate on which the bad mark is detected to the extent that the plurality of pattern holes approximately match the plurality of print target positions based on the recognition result of the mask recognition mark and the print position data. By aligning the substrate so that it becomes maximum under the predetermined conditions excluding the above, even when targeting a multi-sided substrate on which a plurality of individual substrates are formed, printed on each individual substrate Misalignment between the position of the solder paste and the component mounting position can be reduced.

The block diagram which shows the structure of the electronic component mounting system of one embodiment of this invention The side view of the screen printing apparatus in the electronic component mounting system of one embodiment of this invention Explanatory drawing of the board | substrate recognition and mask recognition by the screen printing apparatus in the electronic component mounting system of one embodiment of this invention FIG. 7 is a diagram illustrating the arrangement of pattern holes in a screen mask and the configuration of a multi-sided board in an electronic component mounting system according to an embodiment of the present invention The top view of the electronic component mounting apparatus in the electronic component mounting system of one embodiment of this invention Explanatory drawing of the board | substrate recognition by the electronic component mounting apparatus in the electronic component mounting system of one embodiment of this invention The block diagram which shows the structure of the control system of the electronic component mounting system of one embodiment of this invention The flowchart of the manufacturing process of the mounting substrate in the electronic component mounting system of one embodiment of this invention The flowchart which shows the screen printing method in the electronic component mounting system of one embodiment of this invention Process explanatory drawing of the board | substrate alignment process in the screen printing apparatus of one embodiment of this invention Process explanatory drawing of the board | substrate alignment process in the screen printing apparatus of one embodiment of this invention Process explanatory drawing of the board | substrate alignment process in the screen printing apparatus of one embodiment of this invention

  Next, embodiments of the present invention will be described with reference to the drawings. First, an electronic component mounting system will be described with reference to FIG. In FIG. 1, the electronic component mounting system includes a screen printing device M1, a print inspection device M2, an electronic component mounting device M3, a mounting state inspection device M4, and a reflow device M5, all of which are electronic component mounting devices. The electronic component mounting line 1 is connected by a communication network 2 and is controlled by a management computer 3 as a whole. The electronic component mounting line 1 has a function of mounting an electronic component on a substrate and manufacturing a mounting substrate. In the present embodiment, an example is shown in which a multi-planar substrate in which a plurality of individual substrates are formed as a substrate is a work target.

  The screen printing apparatus M1 screen-prints a component bonding paste (solder paste) on the electrodes formed on the substrate. The print inspection apparatus M2 inspects the print state of the paste on the printed substrate. The electronic component mounting apparatus M3 picks up an electronic component from the component supply unit by a mounting head and mounts the electronic component on a printed board. The mounting state inspection apparatus M4 inspects the presence / absence of the electronic component and the displacement on the substrate after the electronic component is mounted. The reflow device M5 heats and melts the solder by heating the substrate after mounting the electronic component, and solder-bonds the electronic component to the substrate.

  Next, the structure and function of the screen printing apparatus M1 will be described with reference to FIG. In FIG. 2, the screen printing apparatus M <b> 1 is configured by disposing a screen printing mechanism 5 above the substrate positioning unit 11. The substrate positioning unit 11 has a function of holding the substrate 4 to be printed and aligning it relative to the screen mask 22 of the screen printing mechanism 5. The substrate positioning unit 11 stacks a Y-axis table 12, an X-axis table 13, and a θ-axis table 14, and further places horizontal base plates 15a and 16a on the upper surface of a horizontal base plate 14a provided on the upper surface of the θ-axis table 14. Are constructed by combining a first Z-axis table 15 and a second Z-axis table 16 that lift and lower each independently.

  Two vertical frames 15b are erected on the base plate 15a, and a substrate transport mechanism 18 is held at the upper end of the vertical frame 15b. The substrate transport mechanism 18 is disposed in the substrate transport direction (X direction--the direction perpendicular to the paper surface in FIG. 1), and supports and transports both ends of the substrate 4 to be printed by the conveyor mechanism. By driving the first Z-axis table 15, the substrate 4 held by the substrate transport mechanism 18 can be moved up and down with respect to the screen printing mechanism 5. A substrate support 17 is detachably mounted on the upper surface of the base plate 16a. The substrate receiving part 17 receives and holds the substrate 4 transported to the printing position by the screen printing mechanism 5 from below.

  By driving the second Z-axis table 16, the substrate receiving part 17 moves up and down with respect to the substrate 4 held by the substrate transport mechanism 18. Then, the substrate receiving portion 17 supports the substrate 4 from the lower surface side by contacting the lower surface of the substrate receiving portion 17 with the lower surface of the substrate 4. The upper surface of the substrate transport mechanism 18 is provided with two clamp members 19 disposed opposite to each other, and the clamp member 19 on one side is advanced and retracted by the drive mechanism 19a, whereby the substrate 4 is clamped and fixed from both sides. To do.

  Next, the screen printing mechanism 5 that prints the paste on the substrate 4 that is disposed above the substrate positioning unit 11 and transported to the printing position will be described. In FIG. 2, the screen printing mechanism 5 has a configuration in which a squeegee unit 23 is horizontally moved by a squeegee moving mechanism 24 above a mask unit 20 having a configuration in which a screen mask 22 is extended on a mask frame 21. As shown in FIG. 3B, a print target area 22d for the substrate 4 is set on the screen mask 22, and mask recognition marks 22a are formed at diagonal positions of the print target area 22d. . As shown in FIG. 3C, the substrate 4 to be printed is a multi-sided substrate, and a plurality (three in this case) of individual substrates 41 are formed on the substrate 4.

  Here, the arrangement of the pattern holes 22b and the configuration of the substrate 4 in the print target area 22d will be described with reference to FIG. As shown in FIG. 4B, the substrate 4 has a configuration in which a plurality of individual substrates 41 are mounted on a substrate carrier 40 serving as a base. An adhesive sticking surface is formed on the surface of the substrate carrier 40, and the individual substrate 41 made of a resin substrate can be detachably attached and held. When the individual substrate 41 is mounted on the substrate carrier 40, the substrate 41 is attached to the bonding surface of the substrate carrier 40 while being aligned with the substrate carrier 40 by positioning means such as positioning pins provided on the substrate carrier 40. Press against it.

  A substrate recognition mark 4a as a pair of position reference marks is formed at a diagonal position of the substrate carrier 40, and the position of the entire substrate 4 is detected by imaging the substrate recognition mark 4a and recognizing the position. . The position reference mark is used as a position reference in alignment between the substrate 4 and the screen mask 22. A substrate recognition mark 41a is formed at a diagonal position of each individual substrate 41, and the position of the individual substrate 41 is individually detected by imaging the substrate recognition mark 41a and recognizing the position. In detecting the position of the substrate 4, instead of providing the substrate recognition mark 4a on the substrate carrier 40, among the substrate recognition marks 41a formed on each individual substrate 41, the substrate 4 is attached to the substrate carrier 40. A pair of substrate recognition marks 41a (for example, a pair of substrate recognition marks 41a indicated by an arrow A) positioned diagonally may be used as position reference marks for detecting the entire position of the substrate 4.

  The individual substrate 41 has a structure in which a plurality of (here, two) element substrates 42 are formed on a single resin substrate. That is, the substrate 4 as a parent substrate is composed of an individual substrate 41 as a child substrate and an element substrate 42 as a grandchild substrate. The element substrate 42 is formed with a plurality of electrodes 43 to which the electrodes of the electronic components to be mounted are joined. As shown in FIG. Corresponding to the arrangement of the electrodes 43, a plurality of pattern holes 22b are formed. In the screen printing operation, solder paste is collectively printed on each electrode 43 of the plurality of element substrates 42 through the pattern holes 22b of the screen mask.

  Each element substrate 42 is provided with a mark forming land 42a for applying a mark, and a bad mark BM is applied to the mark forming land 42a in the previous step. In the example shown in FIG. 4B, a bad mark BM is applied to the element substrate 42 * on the upper side of the central piece substrate 41. The bad mark BM indicates that the element substrate 42 is a defective substrate that does not require the work execution in the subsequent process, based on the result of the inspection performed in the previous process. When it is determined, it is automatically applied, or when it is determined to be defective by an operator's visual inspection, it is applied manually. Then, the element substrate 42 in which the bad mark BM is detected in the subsequent process is determined to be unnecessary to perform the subsequent work, and is excluded from the work target.

  That is, in the embodiment shown here, the individual substrate 41 is a composite substrate that is further divided into a plurality of element substrates 42 in the subsequent process, and the bad mark BM is formed for each element substrate 42. . Then, calculation processing for alignment of the substrate 4 is executed under conditions excluding the element substrate 42 in which the bad mark BM is detected. In this embodiment, an example in which a plurality of resinous individual substrates 41 are bonded to a substrate carrier 40 as a multi-sided substrate is shown. A configuration in which individual substrates as a plurality of sub-substrates are formed on a solid substrate as a parent substrate is also included. In this case, after the operation is completed, the parent substrate is divided for each individual substrate.

  A squeegee unit 23 is disposed on the mask unit 20. The squeegee unit 23 has a configuration in which two squeegee raising / lowering mechanisms 27 for raising and lowering a pair of squeegee members 26 arranged opposite to each other are arranged on a horizontal plate 25. By driving the squeegee lifting mechanism 27, the squeegee member 26 moves up and down, and the squeegee member 26 contacts the upper surface of the screen mask 22 in the lowered state. The squeegee unit 23 is reciprocally movable in the horizontal direction by a squeegee moving mechanism 24 configured to rotate the feed screw 24b by a squeegee moving motor 24a.

  A camera unit 28 is disposed between the lower surface of the screen mask 22 and the upper surface of the substrate 4 held by the substrate positioning unit 11 so as to be horizontally movable in the X and Y directions by a camera moving mechanism (not shown). Yes. As shown in FIG. 3A, the camera unit 28 includes a substrate recognition camera 28a for imaging the substrate 4 from above and a mask recognition camera 28b for imaging the screen mask 22 from the lower surface side. Then, by driving the camera moving mechanism to move the camera unit 28, the mask recognition mark 22a formed on the screen mask 22 and the substrate recognition mark 4a (or the substrate recognition mark 41a as the position reference mark formed on the substrate 4). ) And the mark formation land 42a of each element substrate 42 can be imaged by the mask recognition camera 28b and the substrate recognition camera 28a, respectively. The imaging result is recognized by the recognition processing unit 55 (see FIG. 6), whereby the position of the mask recognition mark 22a and the position reference mark (substrate recognition mark 4a or substrate recognition mark 41a) and the bad mark of each element substrate 42 are detected. BM is detected.

  Next, the printing operation by the screen printing mechanism 5 will be described. First, the substrate transport mechanism 18 carries the substrate 4 to be printed into the printing position and aligns it with the substrate receiving portion 17. Next, the second Z-axis table 16 is driven to raise the substrate receiving portion 17 and receive the lower surface of the substrate 4. Next, after the substrate positioning unit 11 is driven and the substrate 4 is aligned with the screen mask 22, the first Z-axis table 15 is driven to raise the substrate 4 together with the substrate transport mechanism 18, and the pattern hole 22b. Is brought into contact with the lower surface of the screen mask 22 provided. Thereafter, the horizontal position of the substrate 4 is fixed by clamping the substrate 4 with the clamp member 19.

  In this state, one of the two squeegee members 26 is lowered and brought into contact with the screen mask 22 supplied with the paste. Next, by sliding the squeegee member 26 on the screen mask 22 in the squeegeeing direction (Y direction), the pattern holes are formed in the electrodes 43 of the plurality of element substrates 42 constituting the substrate 4 held by the substrate positioning unit 11. The paste is printed via 22b.

  In the above-described printing operation, the substrate 4 to be printed is correctly aligned with the screen mask 22, and the electrodes 43 of the plurality of element substrates 42 and the positions of the pattern holes 22b are accurately matched. Is very important, but the position of the individual electrodes 43 and the position of the pattern holes 22b depend on the alignment accuracy of the individual substrate 41 to the substrate carrier 40 in the substrate 4 and the temporal deformation of the individual substrate 41 itself. In many cases, they do not always match and misalignment occurs in printing. For this reason, in this embodiment, in order to prevent the positional deviation of printing due to the positional error between the individual substrates 41 of the substrate 4 and the screen mask 22 as much as possible, the positional deviation is corrected by the method described later. Like to do.

  Next, the configuration and function of the electronic component mounting apparatus M3 will be described with reference to FIG. In FIG. 5, a substrate transport mechanism 32 is disposed in the X direction at the center of the base 31. The board transport mechanism 32 receives the board 4 after the printing inspection by the printing inspection apparatus M2, and positions and holds the board 4 at a mounting work position by a component mounting mechanism described below. The substrate 4 is a multi-sided substrate in which a plurality of individual substrates 41 are bonded to a substrate carrier 40. A component supply unit 33 is disposed on both sides of the substrate transport mechanism 32, and a plurality of tape feeders 34 are arranged in parallel on the component supply unit 33. The tape feeder 34 feeds the carrier tape holding the electronic components mounted on the substrate 4 to the component pick-up position by the component mounting mechanism by pitch feeding.

  A Y-axis moving table 36Y equipped with a linear motor-driven linear motion mechanism is arranged in the Y direction at one end of the base 31 in the X direction. Similarly, the Y-axis moving table 36Y has a linear motor-driven linear motion mechanism. Two X-axis moving tables 36X provided with a moving mechanism are coupled so as to reciprocate in the Y direction. A mounting head 37 having a plurality of suction nozzles 37a is mounted on the X-axis moving table 36X so as to be reciprocally movable in the X direction, and the mounting head is driven by driving the Y-axis moving table 36Y and the X-axis moving table 36X. 37 moves horizontally in the X and Y directions.

  As a result, the mounting head 37 takes out the electronic component P (see FIG. 6A) from the tape feeder 34 of the component supply unit 33, and the component mounting position of the substrate 4 on which the paste is printed and positioned by the substrate transport mechanism 32. An electronic component P is mounted on the. The Y-axis movement table 36Y, the X-axis movement table 36X, and the mounting head 37 constitute a component mounting mechanism 35 that mounts the electronic component P on the component mounting position of the substrate 4 on which the paste is printed by the mounting head 37.

  A component recognition camera 39 is disposed on the movement path of the mounting head 37 between the substrate transport mechanism 32 and the component supply unit 33, and the mounting head 37 that has picked up the electronic component from the tape feeder 34 is connected to the component recognition camera 39. By moving upward, the component recognition camera 39 images the electronic component held by the mounting head 37 from below. The mounting head 37 is provided with a substrate recognition camera 38 that is located on the lower surface side of the Y-axis moving table 36Y and moves integrally with the mounting head 37 with the imaging direction facing downward.

  As shown in FIG. 6A, when the mounting head 37 is moved above the substrate 4 held by the substrate transport mechanism 32, the substrate recognition camera 38 is also moved above the substrate 4 and the substrate 4 of the substrate 4 is moved. The position reference mark (substrate recognition mark 4a or substrate recognition mark 41a indicated by arrow A in FIG. 4B) formed on the carrier 40 and the mark formation land 42a of each element substrate 42 are imaged. The recognition result is recognized by the recognition processing unit 64 (see FIG. 7), whereby the position recognition of the position reference mark and the presence / absence of the bad mark BM on each element substrate 42 are detected.

  Then, by executing position correction processing using a predetermined position correction algorithm based on the position recognition result of the position reference mark, the position of the component mounting point corresponding to the electrode 43 formed on each element substrate 42 on the substrate 4 is determined. It is corrected and the component mounting position is obtained. In the component mounting operation by the mounting head 37, the electronic component is mounted with the component mounting position corrected in this way as a target. The element substrate 42 in which the bad mark BM is detected is excluded from the execution target of the component mounting operation.

  Next, the configuration of the control system will be described with reference to FIG. Here, only the control systems of the screen printing device M1 and the electronic component mounting device M3 among the plurality of electronic component mounting devices constituting the electronic component mounting line 1 are described. 7, the management computer 3 includes a data storage unit 30 as an external storage device, and the data storage unit 30 stores work execution data such as print position data 30a and mounting position data 30b. The printing position data 30a and the mounting position data 30b are reference data used for alignment of the substrate 4 in the screen printing apparatus M1, and the printing position data 30a is a positional relationship between the arrangement of the pattern holes 22b and the mask recognition marks 22a. The mounting position data 30b indicates the position of the component mounting point on the board 4, that is, the positional relationship between the electrode 43 and the board recognition mark 4a. Here, data combining mark position data indicating the relative position between the substrate recognition mark 4 a and the substrate recognition mark 41 a and electrode position data indicating the relative position between the substrate recognition mark 41 a and the electrode 43 on the individual substrate 41 is obtained. It is remembered.

  A control system of the screen printing apparatus M1 will be described. The communication unit 50 is connected to the communication network 2, and transmission / reception of signals between other units such as the management computer 3 and the print inspection apparatus M 2 and the following units is performed via the communication unit 50. The print control unit 51 controls the screen printing operation by the screen printing mechanism 5. The alignment control unit 52 controls the substrate positioning operation by the substrate positioning unit 11. The storage unit 53 stores a position correction program 53a, printing position data 53b, and mounting position data 53c.

  The position correction program 53a is an arithmetic processing program that performs position correction for obtaining the print target position for the electrode 43 based on the position detection result of the substrate recognition mark 41a on the substrate 4. The printing position data 53b and the mounting position data 53c are work execution data having the same purpose and the same contents as the printing position data 30a and the mounting position data 30b stored in the data storage unit 30. In this example, the data storage unit 30 of the management computer 3 and the storage unit 53 of the screen printing apparatus M1 store these data redundantly. However, these data are stored only in one of them. It may be.

  The mechanism drive unit 54 is controlled by the print control unit 51 and the alignment control unit 52 to drive the substrate positioning unit 11 and the screen printing mechanism 5. Thereby, the screen printing operation is executed. The recognition processing unit 55 performs recognition processing on the imaging results obtained by the substrate recognition camera 28a and the mask recognition camera 28b. Thereby, the position of the mask recognition mark 22a on the screen mask 22, the position recognition of the position reference mark on the substrate 4, and the presence / absence of the bad mark BM on each element substrate 42 are detected. The alignment of the substrate 4 to the screen mask 22 is performed by the alignment control unit 52 controlling the substrate positioning unit 11 based on these position recognition results.

  The substrate recognition camera 28a, the mask recognition camera 28b, and the recognition processing unit 55 constitute first recognition means for recognizing the mask recognition mark 22a formed on the screen mask 22 and the position reference mark formed on the substrate 4. The base alignment control unit 52 aligns the substrate 4 with respect to the screen mask 22 by controlling the substrate positioning unit 11 based on the recognition result of the first mark recognition unit. Further, the substrate recognition camera 28a and the recognition processing unit 55 detect the presence or absence of a bad mark BM that is formed on the element substrate 42 and indicates that the element substrate 42 is a defective substrate that does not require work execution in a subsequent process. It is a bad mark detection means.

  In the present embodiment, when the alignment control unit 52 performs alignment of the substrate 4, as described below, position correction applied to the substrate 4 in the electronic component mounting apparatus M3, that is, substrate recognition. A print target for printing the paste for the electrode 43 in the screen printing apparatus M1 by correcting the component mounting position for the electrode 43 performed by applying a predetermined position correction algorithm based on the recognition result of the mark 4a. It helps to set the position.

  In other words, the positional reference mark in the screen printing apparatus M1 is the positional displacement of the electrode 43 on the substrate 4 due to the positional displacement when the individual substrate 41 is mounted on the substrate carrier 40 or the aging of the individual substrate 41 itself. Is estimated using a position correction algorithm stored in the storage unit 53 as the position correction program 53a. Here, as the position correction algorithm, it is desirable that the print target position is obtained by the same method as the position correction algorithm applied in the mounting position correction in the electronic component mounting apparatus M3. As long as the tendency of position correction is approximate, it may be partially different.

  When the screen mask 22 is aligned with the substrate 4, the expansion and contraction of the screen mask 22 is negligibly small with respect to the displacement of the electrode 43 on the substrate 4. The tendency of displacement and the displacement due to expansion / contraction of the pattern hole 22b in the screen mask 22 do not coincide. For this reason, in the position adjustment for alignment, the pattern hole 22b of the screen mask 22 and the electrode 43 of the substrate 4 are approximately matched with each other in such a manner that the solder bonding is not affected as much as possible. Adjust the position.

  In the present embodiment, the degree of approximate coincidence is maximized under a predetermined condition, that is, a condition excluding the element substrate 42 from which the bad mark BM is detected among the plurality of element substrates 42. This position adjustment is performed. That is, when approximately aligning the plurality of electrodes 43 and the pattern holes 22b having misalignment errors with each other, generally, the smaller the number of the target electrodes 43 and the pattern holes 22b, the more the two are approximately. The degree of matching increases. For this reason, here, the number of the alignment target electrodes 43 and the pattern holes 22b is reduced by excluding the element substrate 42 which is detected as the bad mark BM and is not a work target in the subsequent process from the position adjustment targets. I have to.

  That is, the alignment control unit 52 obtains a plurality of print target positions where the paste is to be printed on the substrate 4 based on the recognition result of the substrate recognition mark 4a and the mounting position data 53c, and then the recognition result of the mask recognition mark 22a and The degree to which the plurality of pattern holes 22b approximately match the plurality of print target positions based on the print position data 53b is determined under the condition where the element substrate 42 in which the bad mark BM is detected is excluded from the plurality of element substrates 42. It has a function of aligning the substrate 4 so as to be maximized.

  A control system of the electronic component mounting apparatus M3 will be described. The communication unit 60 is connected to the communication network 2, and transmission / reception of signals between other units such as the management computer 3 and the screen printing apparatus M 1 and the following units is performed via the communication unit 60. The mounting control unit 61 controls the component mounting operation by the component mounting mechanism 35. The position correction program 62a is an arithmetic processing program for correcting the positions of the electrodes 43 and the like based on the position detection results of the board recognition mark 4a and the board recognition mark 41a in the component mounting mechanism 35, and the position correction program of the screen printing apparatus M1. A position correction algorithm similar to that of the program 53a is used.

  The mounting position data 62b is work execution data having the same purpose and content as the printing position data 30a stored in the data storage unit 30. Here, an example is shown in which these data are duplicated and stored in the data storage unit 30 of the management computer 3 and the storage unit 62 of the electronic component mounting apparatus M3, but these data are stored in only one of them. You may do it.

  The mechanism driving unit 63 is controlled by the mounting control unit 61 to drive the board transport mechanism 32 and the component mounting mechanism 35. Thereby, a component mounting operation is executed. The recognition processing unit 64 performs recognition processing on the imaging results obtained by the board recognition camera 38 and the component recognition camera 39. Thus, the substrate recognition mark 4a of the substrate 4 positioned and held by the substrate transport mechanism 32, the position recognition of the substrate recognition mark 41a on the individual substrate 41, and the detection of the presence or absence of the bad mark BM formed on each element substrate 42 And the electronic component in the state hold | maintained at the mounting head 37 is recognized. The electronic component P is mounted on the board 4 by the mounting control unit 61 controlling the component mounting mechanism 35 based on the position recognition results.

  The substrate recognition camera 38 and the recognition processing unit 64 constitute second mark recognition means for recognizing the substrate recognition mark 4a formed on the substrate 4 in the print inspection apparatus M2. Then, the mounting control unit 61 controls the component mounting mechanism 35 based on the recognition result of the second mark recognizing means to mount the electronic component P on the board 4. The substrate recognition camera 38 and the recognition processing unit 64 serve as second bad mark detection means for detecting the presence or absence of a bad mark BM formed on the element substrate 42 of the substrate 4.

  Next, a method for manufacturing a mounting board in the electronic component mounting system shown in FIG. 1 will be described with reference to FIG. In FIG. 8, first, the substrate 4 to be worked is carried into the screen printing apparatus M1 (ST1). Next, first mark recognition is performed (ST2). That is, the mask recognition mark 22a formed on the screen mask 22 and the position reference (substrate recognition mark 4a or substrate recognition mark 41a) formed on the substrate 4 are imaged by the mask recognition camera 28b and the substrate recognition camera 28a, respectively. The recognition processing unit 55 recognizes the imaging result, thereby recognizing the positions of the mask recognition mark 22a and the position reference mark (first mark recognition step). Next, first bad mark detection is executed (ST3). That is, the presence or absence of the bad mark BM is detected by imaging the mark formation land 42a of each element substrate 42 and performing recognition processing of the imaging result by the recognition processing unit 55 (first bad mark detection step).

  Next, on the basis of the mark recognition result in the first mark recognition step and the detection result of the bad mark BM in the first bad mark detection step, alignment control for aligning the substrate 4 with the screen mask 22 is executed ( ST4). That is, the alignment control unit 52 controls the substrate positioning unit 11 based on the recognition result obtained in the first mark recognition process, thereby aligning the substrate 4 with respect to the screen mask 22 (alignment control process). ).

  Next, screen printing is executed (ST5). That is, by sliding the squeegee member 26 on the screen mask 22 to which the paste is supplied, the paste is printed on the substrate 4 positioned and held by the substrate positioning portion 11 through the pattern holes 22b formed in the screen mask 22. (Screen printing process). Then, the board | substrate 4 is carried in to the printing test | inspection apparatus M2, and the quality of the printing state of the paste printed by imaging the board | substrate 4 is optically determined (ST6). And the board | substrate 4 determined that the printing state is favorable here is carried in to the electronic component mounting apparatus M3 (ST7).

  Next, second mark recognition is performed (ST8). That is, the substrate 4 is imaged by the substrate recognition camera 38, and the imaging result is recognized by the recognition processing unit 64, thereby recognizing the position of the substrate recognition mark 4a (second mark recognition step). Next, second bad mark detection is performed (ST9). That is, the presence or absence of the bad mark BM is detected by imaging the mark formation land 42a of each element substrate 42 and performing recognition processing on the imaging result by the recognition processing unit 64 (second bad mark detection step). Note that the detection result in the first bad mark detection step (ST3) may be received via the communication network 2 and the second bad mark may be omitted.

  Next, an electronic component mounting operation by the component mounting mechanism 35 is executed (ST10). Then, the substrate 4 after mounting the electronic component is carried into the mounting state inspection apparatus M4, and the mounting state inspection is executed (ST11). If it is determined that the mounting state is good, the substrate 4 is carried into the reflow apparatus M5 (ST12). Here, by heating the substrate 4 according to a predetermined heating profile, the solder in the paste is melted and the electronic component P is soldered to the substrate 4 (ST13). Thereby, the manufacturing process of the mounting substrate is completed.

  In the mounting substrate manufacturing process described above, the screen printing apparatus M1 is obtained in the first mark recognition process, the first bad mark detection process, and the first mark recognition process prior to the screen printing process. An alignment control step of aligning the substrate 4 with respect to the screen mask 22 based on the recognition result is executed. The electronic component mounting apparatus M3 includes a second mark recognition process for recognizing the board recognition mark 4a and a second bad mark detection process for detecting the bad mark BM prior to the component mounting process by the component mounting mechanism 35. The electronic component P is mounted on the component mounting position based on the recognition result obtained in the second mark recognition step in the component mounting step.

  Then, in the alignment control process, a plurality of print target positions where the paste is to be printed on the board 4 is obtained based on the recognition result of the board recognition mark 4a in the first mark recognition process and the mounting position data 53c, and then the mask recognition mark Based on the recognition result 22a and the print position data 53b, the bad mark BM of the element substrates 42 of the plurality of individual substrates 41 detects the degree to which the plurality of pattern holes 22b approximately match the plurality of print target positions. The substrate 4 is aligned so as to be maximized under the conditions excluding the element substrate 42 formed.

  Then, in the subsequent component mounting process, the component board 42 where the bad mark BM is detected is excluded and the position of the component mounting point is corrected according to a predetermined position correction algorithm based on the recognition result in the second mark recognition process. Then, the component mounting position when the electronic component P is actually mounted by the mounting head 37 is obtained. Here, by obtaining a plurality of print target positions by a method similar to the position correction algorithm used in the component mounting process in the alignment control process, the component mounting position and the print target position can be approximated as much as possible. Thereby, it is possible to reduce problems caused by the positional deviation between the printed paste and the mounted electronic component P.

  Next, in the electronic component mounting system described above, prior to electronic component mounting by the electronic component mounting device M3, a screen in the electronic component mounting system in which paste for component bonding is printed on the electrodes formed on the substrate 4 by the screen printing device M1. The printing method will be described with reference to FIGS. 10 to 12 in accordance with the flow of FIG.

  First, the substrate 4 to be worked is carried into the screen printing apparatus M1 (ST21), and the substrate 4 is clamped by the substrate positioning unit 11 in a state where the substrate 4 is received by the substrate receiving unit 17 (ST22). As shown in FIG. 10A, the substrate carrier 40 constituting the substrate 4 has a substrate recognition mark 4 a as a position reference mark formed at a diagonal position, and an individual substrate 41 attached to the substrate carrier 40. An electrode 43 for mounting an electronic component by solder bonding is formed on the element substrate 42 that is built in step (b).

  Next, the camera unit 28 is moved, and the position reference mark (here, the substrate recognition mark 4a) and the mask recognition mark 22a are recognized by the substrate recognition camera 28a and the mask recognition camera 28b (ST23). As a result, as shown in FIG. 10B, the positional deviation of the substrate recognition mark 4a from the normal position (see the substrate recognition mark 4a * indicated by the broken line) is detected. Here, the direction of displacement and the amount of displacement are indicated by vectors with arrows a1 and a2. Then, the substrate recognition camera 28a images the mark formation lands 42a of each element substrate 42, and the recognition processing unit 55 performs recognition processing to detect the presence or absence of the bad mark BM (ST24) (bad mark detection). Process).

  Next, based on the recognition result of the substrate recognition mark 4a, the print target position is calculated by excluding the element substrate 42 of the individual substrate 41 where the bad mark BM is detected (ST25). That is, the positional deviation correction is performed by converting the position coordinates of the electrode 43 indicated by the mounting position data 53c into the positional coordinates on the correction coordinate system corrected by the positional deviation of the substrate recognition mark 4a according to a predetermined position correction algorithm. A later print target position is determined. That is, like the electrode 43 surrounded by an ellipse in FIG. 10B, the position of the electrode 43 that has been displaced by the arrows b1 and b2 from the normal position (electrode 43 * indicated by the broken line) is displaced. Calculated as the target position.

  As the position correction algorithm used here, a position correction calculation formula using a coordinate conversion formula known in the technical field is appropriately selected and used. By executing such position correction calculation, it is possible to efficiently obtain the print target position without recognizing the actual electrode 43 on the substrate 4. Here, an example is shown in which two substrate recognition marks 4a arranged at diagonal positions of the substrate 4 are used as position reference marks. However, for the purpose of improving position correction accuracy, the substrate recognition of each individual substrate 41 is performed. The print target position may be obtained by recognizing the position of the mark 41a. Thereby, the error resulting from the positional deviation of the individual substrate 41 in the substrate carrier 40 can be reduced, and more accurate position correction can be performed.

  Next, the substrate 4 is aligned with the screen mask 22 based on the print target position obtained by the calculation (ST26). Here, the position of the pattern hole 22b in the mask unit 20 shown in FIG. 10 (c) corresponds to the electrode 43 in FIG. 10 (b). Therefore, when aligning the substrate 4 with the screen mask 22, it is necessary to adjust the relative position between the pattern hole 22 b and the electrode 43. This relative position adjustment will be described.

  FIGS. 11A and 11B show alignment reference lines for the screen mask 22 and the substrate 4. That is, in the mask unit 20 shown in FIG. 11A, by recognizing the two mask recognition marks 22a, the mask X axis 22X and the mask Y axis 22Y orthogonal to the XY direction through the center point 22CP of the screen mask 22 are recognized. Is required. Similarly, in the substrate 4 shown in FIG. 11B, by recognizing the two substrate recognition marks 4a, the substrate X axis 4X and the substrate Y axis 4Y orthogonal to the XY direction pass through the center point 4CP of the substrate 4. Desired. As shown in FIG. 11C, δy indicating the offset amount in the Y direction between the mask X axis 22X and the substrate X axis 4X, and δx indicating the offset amount in the X direction between the mask Y axis 22Y and the substrate Y axis 4Y. Is specified to define the manner in which the substrate 4 is aligned with the screen mask 22. Note that the element substrate 42 * in which the bad mark BM is detected on the substrate 4 is excluded from the target of component mounting work, and therefore may be excluded from the target of adjusting the relative position between the pattern hole 22b and the electrode 43. .

  That is, as shown in FIG. 12, when aligning the substrate 4, the substrate 4 is aligned with the screen mask 22 under the condition that the electrode 43 of the element substrate 42 * where the bad mark BM is detected is excluded. The degree of coincidence between the electrode 43 and the pattern hole 22b is optimized. Here, the offset amounts δx and δy are calculated for all the electrodes 43 of each element substrate 42 constituting the substrate 4 so that the degree of positional deviation from the pattern hole 22b is uniform.

  At this time, since the position adjustment of the pattern hole 22b and the electrode 43 is performed under conditions excluding the electrode 43 of the element substrate 42 * where the bad mark BM is detected, the position adjustment calculation is facilitated and the alignment accuracy is increased. It is possible to improve. That is, as shown in FIG. 12B, when the element substrate 42 * on which the bad mark BM is detected has a large positional deviation d, the positional adjustment is performed by excluding the misaligned electrode 43. An operation is performed. Therefore, in the method of approximately aligning the electrode 43 and the pattern hole 22b by allocating the overall misregistration amount to each printing position, the misregistration factor can be excluded and the alignment accuracy can be improved. Can do.

  After the alignment of the substrate 4 is completed in this way, the first Z-axis table 15 is driven to raise the clamped substrate 4 and bring it into contact with the screen mask 22 (ST27). Next, a squeegeeing operation is performed in which the squeegee member 26 is slid while the squeegee member 26 is in contact with the upper surface of the screen mask 22 supplied with the paste (ST28). Thus, the paste is printed on the electrode 43 of the substrate 4 through the pattern hole 22b. Thereafter, a plate separating operation for lowering the substrate 4 and separating it from the lower surface of the screen mask 22 is performed (ST29), thereby completing the screen printing operation (ST30).

  As described above, in the screen printing used in the electronic component mounting system shown in the present embodiment, the mask recognition mark 22a and the substrate recognition as the position reference mark are performed prior to the screen printing process of printing the paste on the substrate 4. Based on the mark recognition process for recognizing the mark 4a, the bad mark detection process for detecting the bad mark BM, the recognition result obtained in the mark recognition process and the mounting position data 53c stored in advance, the substrate positioning unit 11 is controlled. Thus, an alignment control process for aligning the substrate 4 with respect to the screen mask is performed.

  In this alignment control step, a plurality of print target positions where the paste is to be printed on the substrate 4 is obtained based on the recognition result of the position reference mark and the mounting position data 30b, and then the recognition result and the print position of the mask recognition mark 22a. A condition in which the degree to which the plurality of pattern holes approximately match the plurality of print target positions based on the data 53b excludes the element substrate 42 in which the bad mark BM is detected among the element substrates 42 of the plurality of individual substrates 41. The substrate 4 is aligned so as to have a maximum below. Accordingly, even when a multi-planar board on which a plurality of individual boards are formed is targeted, it is possible to reduce misalignment between the position of the paste printed on the board 4 and the component mounting position.

  The electronic component mounting system and mounting board manufacturing method according to the present invention include the position and components of the solder paste printed on each individual board, even when a multi-sided board on which a plurality of individual boards are formed is targeted. It has the effect of reducing the displacement from the mounting position, and is configured by connecting multiple electronic component mounting devices, and is useful in the field of manufacturing a mounting substrate by mounting electronic components on a substrate by solder bonding It is.

DESCRIPTION OF SYMBOLS 1 Electronic component mounting line 2 Communication network 3 Management computer 4 Board 4a Board recognition mark 5 Screen printing mechanism 11 Board positioning part 22 Screen mask 22a Mask recognition mark 22b Pattern hole 23 Squeegee unit 28a Board recognition camera 28b Mask recognition camera 33 Component supply part 35 Component mounting mechanism 37 Mounting head 38 Substrate recognition camera 40 Substrate carrier 41 Single substrate 41a Substrate recognition mark 42 Element substrate 43 Electrode BM Bad mark P Electronic component

Claims (5)

An electronic component mounting system configured to connect a plurality of electronic component mounting apparatuses and mount the electronic component on a multi-sided board on which a plurality of individual substrates are formed to manufacture a mounting board,
In the electronic component mounting apparatus, the paste is printed by picking up an electronic component from a component supply unit by a mounting head, and a screen printing apparatus that prints a paste for bonding the component on the electrode formed on the individual substrate. Including an electronic component mounting device mounted on a single substrate,
In the screen printing apparatus, each individual substrate of the substrate that is positioned and held by the substrate positioning portion through a pattern hole formed in the screen mask by sliding a squeegee on the screen mask supplied with the paste A screen printing mechanism to print the paste on,
First mark recognition means for recognizing a mask recognition mark formed on the screen mask and a position reference mark formed on the substrate;
First bad mark detection means for detecting the presence or absence of a bad mark formed on the individual substrate and indicating that the individual substrate is a defective substrate that does not require work in a subsequent process;
An alignment control unit that aligns the substrate with respect to the screen mask by controlling the substrate positioning unit based on a recognition result of the first mark recognition unit;
The electronic component mounting apparatus recognizes a component mounting mechanism that mounts an electronic component on the component mounting position of the individual substrate on which the paste is printed by the mounting head, and a substrate recognition mark formed on the individual substrate. The electronic component by controlling the component mounting mechanism based on a recognition result of the second mark recognition unit, a second bad mark detection unit that detects the presence or absence of the bad mark, and a recognition result of the second mark recognition unit And a mounting control unit for mounting at the component mounting position,
Further, reference data used in the alignment of the board, the printing position data indicating the positional relationship between the pattern hole array and the mask recognition mark, and the position of the component mounting point on the board and the position reference mark A data storage unit that stores mounting position data indicating the positional relationship for each board type,
The alignment control unit obtains a plurality of print target positions on which the paste is to be printed on the substrate based on the recognition result of the position reference mark by the first mark recognition unit and the mounting position data, and then the mask recognition mark The degree to which the plurality of pattern holes approximately match the plurality of print target positions based on the recognition result of the print position data and the print position data, and the individual substrate from which the bad mark is detected among the plurality of individual substrates Align the substrate so that it is maximal under conditions
The mounting control unit corrects the position of the component mounting point according to a predetermined position correction algorithm based on the recognition result of the second mark recognizing means, excluding the individual board where the bad mark is detected. An electronic component mounting system characterized in that the component mounting position is obtained.   The electronic component mounting system according to claim 1, wherein the alignment control unit obtains the plurality of print target positions by a method similar to the position correction algorithm.   The individual substrate is a composite substrate that is further divided into a plurality of element substrates in a subsequent process, and the bad mark is formed for each element substrate, and the bad mark is detected among the plurality of element substrates. The electronic component mounting system according to claim 1, wherein the substrate is aligned under a condition excluding the element substrate formed. A mounting substrate manufacturing method in an electronic component mounting system in which a mounting substrate is manufactured by mounting an electronic component on a multi-sided substrate formed by connecting a plurality of electronic component mounting devices and forming a plurality of individual substrates. There,
In the electronic component mounting apparatus, the paste is printed by picking up an electronic component from a component supply unit by a mounting head, and a screen printing apparatus that prints a paste for bonding the component on the electrode formed on the individual substrate. Including an electronic component mounting device mounted on a single substrate,
In the screen printing apparatus, each individual substrate of the substrate that is positioned and held by the substrate positioning portion through a pattern hole formed in the screen mask by sliding a squeegee on the screen mask supplied with the paste Prior to the screen printing step of printing the paste on the first substrate, the first mark recognition step for recognizing the mask recognition mark formed on the screen mask and the position reference mark formed on the substrate, and the individual substrate. A first bad mark detection step for detecting the presence or absence of a bad mark indicating that the individual substrate is a defective substrate that does not require work execution in a later step, and a recognition result obtained in the first mark recognition step. By controlling the substrate positioning unit based on the position of the substrate relative to the screen mask. Run the alignment control step of Align,
The electronic component mounting device recognizes a substrate recognition mark formed on the individual substrate prior to a component mounting step of mounting the electronic component on the component mounting position of the individual substrate on which the paste is printed by the mounting head. A second mark recognition step for detecting the bad mark, and a second bad mark detection step for detecting the bad mark, and the component based on the recognition result obtained in the second mark recognition step in the component mounting step. By controlling the mounting mechanism, the electronic component is mounted at the component mounting position,
Further, the electronic component mounting system is reference data used in the alignment of the board, and print position data indicating a positional relationship between the pattern hole arrangement and the mask recognition mark, and a position of the component mounting point on the board And a data storage unit that stores mounting position data indicating a positional relationship between the position reference mark and each board type,
In the alignment control step, a plurality of print target positions where the paste is to be printed on the substrate are obtained based on the recognition result of the position reference mark and the mounting position data in the first mark recognition step, and then the mask recognition mark The degree to which the plurality of pattern holes approximately match the plurality of print target positions based on the recognition result of the print position data and the print position data, and the individual substrate from which the bad mark is detected among the plurality of individual substrates Align the substrate so that it is maximal under conditions
In the component mounting step, the position of the component mounting point is corrected according to a predetermined position correction algorithm based on the recognition result in the second mark recognition step, excluding the individual board where the bad mark is detected. A mounting board manufacturing method in an electronic component mounting system, wherein the component mounting position is obtained.   The individual substrate is a composite substrate that is further divided into a plurality of element substrates in a subsequent process, and the bad mark is formed for each element substrate, and the bad mark is detected among the plurality of element substrates. 6. The method of manufacturing a mounting board in an electronic component mounting system according to claim 5, wherein the board is aligned under a condition excluding the element board formed.

Images