JP2009248551A - Substrate position and angle correction device in screen printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce costs by simplifying a substrate position and angle correction means with respect to a mask. <P>SOLUTION: All of the substrates 3 held on a printing table 1 are pushed up concurrently by lower suckers 5. The moving frame 7 of a positioning unit 6 is moved, and the position and angle confirmation marks 3a, 3a marked on the substrates 3 are read by a camera equipment 8. A displacement determination device 9 confirms the positions and angles of the substrates 3 according to the position and angle confirmation marks 3a, 3a of the substrates 3 read by the camera equipment 8 and determines the degree of displacement by checking them against an appropriate position and angle not causing printing displacement corresponding to a predetermined mask. With the substrates 3 sucked and lifted by an upper sucker 10, operation for correcting displacement in an X-axis direction, a Y-axis direction and a θ-direction is performed based on a result determined by the displacement determination device 9. After the forgoing process is applied to all of the substrates 3, printing is performed simultaneously on all of the substrates 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a substrate position and angle correction device in a screen printing machine.

  The screen printer presses a paste-like printing material on a mask from a mask hole of the mask with a squeegee and prints a predetermined pattern on a substrate. And in order to print a pattern correctly on the predetermined position of a board | substrate, the position and angle of a board | substrate with respect to a mask must be exact.

  Therefore, in the screen printing machine, a camera device for reading the position and angle confirmation marks displayed on the upper surface of the substrate, and the movement in the X-axis direction, the Y-axis direction, and the Z-axis direction while supporting the substrate. and a substrate support that rotates in the θ direction.

  By the way, in order to correct the position and angle of the substrate to an appropriate position and angle, it is performed by moving the substrate with such a substrate support. For example, FIG. 2 of Japanese Patent Laid-Open No. 2001-62995 (Patent Document 1). As shown in FIG. 8 of the present application, the substrate support base 100 includes a support frame 102 that receives and supports a substrate 101 displaying position and angle confirmation marks 101a, 101a at predetermined positions on the upper surface from a conveyor (not shown), A movable support base 103 that moves the support frame 102 in the substrate traveling direction (X-axis direction), the direction orthogonal to the substrate (Y-axis direction), the vertical direction (Z-axis direction), and the horizontal direction (θ direction). In addition, since the movable support base 103 requires three servo motors as a driving source, there is a problem that the cost is high. In FIG. 8, 104 is a mask, 105 is a mask hole, 106 is a mask frame, and 107 is a squeegee. The camera device is not shown.

JP 2001-62995 A

  In a screen printing machine, substrates separated into chips are held in alignment on a transfer tray, the transfer tray is aligned and held on a printing table, and each substrate in each transfer tray is printed simultaneously. FIG. 9 to FIG. 12 show such a case.

  Reference numeral 110 denotes a print table in the screen printer. Reference numeral 111 denotes a substrate that is separated into chips, and displays position and angle confirmation marks 111a and 111a at predetermined positions on the upper surface. Reference numeral 112 denotes a transport tray for aligning and holding the substrates 111 separated into chips, and substrate receiving recesses 113 are provided at predetermined intervals on the upper surface.

  Reference numeral 114 denotes a cure comprising a set of four movable cradles 114A disposed at appropriate positions on the upper surface of the printing table 110, and a suction device 114B installed at the lower center of the movable cradle 114A. It is a tool and holds each of the transport trays 112 in alignment. The movable cradle 114A holds the transport tray 112 so as to rotate inward and outward at a predetermined timing with the shaft 114a as a rotation fulcrum, and sandwiched from the front, rear, left and right sides. At this time, the transport tray 112 is supported and supported by the step portion 114b inside the movable receiving base 114A. The suction device 114B is lifted at a predetermined timing and sucks the lower surface of the transport tray 112 supported and supported by the movable receiving base 114A.

  By the way, the substrate 111 divided into chips is made in accordance with the size of the substrate receiving recess 113 of the transport tray 112. However, there is variation in the process of dividing into chips and all are the same. It's not size. A difference of about ± 20μm appears. For this reason, depending on the substrate 111, play occurs in each of the substrate receiving recesses 113 of the transport tray 112, and the center position of the substrate receiving recess 113 of the transport tray 112 may not be at the correct angle. That is, there are cases in which there is a shift in the X-axis direction, the Y-axis direction, or the θ direction. For example, as shown in FIG. 12, the center of the substrate 111 in the substrate receiving recess 113 is shifted to the upper right or left side in the drawing (in the case of “a”), or is shifted to the upper left or right side in the drawing (b). In the case of c), there is a further tilted state (in the case of c). In this state, if all the substrates 111 in one transport tray 112 are simultaneously printed, depending on the substrate 111, the position with respect to the mask may not be appropriate, so that printing may be performed at a position shifted from the normal position, the orientation may be shifted, or printing unevenness may occur. Will occur. For this reason, there has been a demand for improvement in this respect, but there is no example in which this is realized, and there is no patent document.

  The present invention has been made in view of the above points, and the correction means for the position and angle of the substrate with respect to the mask has a simpler structure than the conventional one, so that the cost can be greatly reduced and the chip shape can be reduced. It is possible to cope with the case where the separated substrates are aligned and held on the transport tray, the transport tray is aligned and held on the printing table, and the respective substrates of each transport tray are printed simultaneously. An object of the present invention is to provide an apparatus for correcting the position and angle of a substrate in a screen printing machine.

  Thus, the gist of the present invention is that it is connected to a vacuum device installed at a position directly below the substrate in a printing table that holds the substrate on which the position and angle confirmation marks are displayed at predetermined positions on the upper surface. A lower suction device that pushes up the substrate by raising the timing and sucks and stops the substrate at an appropriate timing, a moving gantry that moves onto the substrate at a predetermined timing on the printing table, and the moving gantry A camera device that reads the position and angle confirmation marks displayed on the substrate, and confirms the position and angle of the substrate from the substrate position and angle confirmation marks read by the camera device, and sets a mask in advance. And a deviation determination device that determines the degree of deviation by comparing with the appropriate position and angle corresponding to the An upper suction device that performs the displacement correction operation in the X-axis direction, the Y-axis direction, and the θ-direction based on the determination result by the displacement determination device in a state where the substrate is sucked and stopped and the substrate is sucked and raised. And a position and angle correction device for a substrate in a screen printing machine.

  In the above configuration, when printing on a plurality of substrates at the same time, the plurality of substrates are aligned and held on the printing table at a predetermined interval, and the moving frame is moved along the X axis with a stroke that matches the interval between the plurality of substrates. It is possible to move in the direction and the Y-axis direction.

  Further, in the case of simultaneously printing on the plurality of substrates, in order to keep the plurality of substrates aligned and held at a predetermined interval on the printing table, the plurality of substrates receiving and supporting the substrates from the conveyor on the printing table. The substrate support frame is arranged at a predetermined interval, or a substrate is received in the substrate receiving recess in a transfer tray provided with a plurality of substrate receiving recesses having a through hole at the center portion at a predetermined interval, It is performed through the transport tray.

  The present invention is configured as described above, and the means for correcting the position and angle of the substrate with respect to the mask has been simplified as compared with the prior art, so that significant cost reduction can be achieved. In addition, the substrate separated into chips can be aligned and held on the transport tray, the transport tray can be aligned and held on the printing table, and each substrate on each transport tray can be printed simultaneously. Is something that can be done.

  The best mode for carrying out a substrate position and angle correction apparatus in a screen printing machine according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic explanatory view of a first embodiment of a substrate position and angle correction device in a screen printing machine according to the present invention, FIG. 2 is an enlarged perspective view of a main part, and FIG. FIG. 4 is a plan view and FIG.

  In the present embodiment, printing is performed on a plurality of substrates at the same time, and the plurality of substrates are aligned and held at a predetermined interval on a printing table. Although it is possible to cope with the case where printing is performed for each individual substrate, the description is omitted because the configuration and operation are substantially the same.

  Thus, in this embodiment, a plurality of substrate support frames 2, 2, 2 that receive and support a substrate from a conveyor (not shown) are arranged on the upper surface of the printing table 1 at predetermined intervals. . The substrate 3 displays position and angle confirmation marks 3a and 3a at predetermined positions on the upper surface thereof.

  Reference numeral 4 denotes a substrate position and angle correction device. Further, the substrate position and angle correction device 4 is installed in a vacuum device (not shown) installed at a position directly below the substrate 3 in the printing table 1 that holds the substrate 3 via the substrate support frame 2. Connected, raised at an appropriate timing to push up the substrate 3 and suck and stop the substrate 3 at an appropriate timing, and on the printing table 1 on the substrate 3 at a predetermined timing A moving gantry 7 that moves, a camera device 8 that is installed on the moving gantry 7 and that reads the position and angle confirmation marks 3a and 3a displayed on the substrate 3, and the position and angle of the substrate 3 that is read by the camera device 8 A deviation determination device that confirms the position and angle of the substrate 3 from the confirmation marks 3a and 3a, and compares the position and angle with a preset mask to determine the degree of deviation. And when the substrate 3 is lifted and lowered at an appropriate timing to suck and stop the substrate 3, and the substrate 3 is sucked and lifted, the X axis is based on the determination result by the shift determination device 9. The positioning unit 6 is composed of the upper suction device 10 that performs the displacement correction operation in the direction, the Y-axis direction, and the θ direction. Further, the movable frame 7 is movable in the X-axis direction and the Y-axis direction with a stroke that matches the interval between the plurality of substrates 3.

Next, the operation of the substrate position and angle correction device 4 according to this embodiment will be described.
FIG. 4A shows a state in which the substrate 3 transferred by the conveyor is held on the printing table 1 via the substrate support frame 2.

  Next, as shown in FIG. 4 (b), all the lower suction devices 5 corresponding to the respective substrates 3 are lifted to a predetermined position all at once, and the substrates 3 are sucked from the substrate support frame 2 in a horizontal state. Push up. The lower suction device 5 stops at the position where the substrate 3 is pushed up, and maintains that state until all the substrates 3 are printed simultaneously.

  Next, as shown in FIG. 4C, the moving base 7 of the positioning unit 6 moves to a position immediately above one substrate 3, and the position of the substrate 3 and the angle confirmation marks 3a, 3a are read by the camera device 8. . Then, the position and angle of the substrate 3 are confirmed from the position and angle confirmation marks 3a and 3a of the substrate 3 read by the camera device 8 by the displacement determination device 9, and appropriateness that does not cause printing displacement corresponding to a preset mask. The degree of deviation is determined by collating with the position and angle.

  Next, as shown in FIG. 4D, the upper suction device 10 descends to suck the substrate 3. Then, as shown in FIG. 4E, the substrate 3 is sucked and raised to a predetermined position. At this position, the upper suction device 10 is moved in the X-axis direction and the Y-axis based on the determination result by the displacement determination device 9. The deviation correction operation in the direction and θ direction is performed.

  Next, as shown in FIG. 4F, the upper suction device 10 descends again to stop sucking the substrate 3, and the lower suction device 5 sucks the substrate 3 in synchronization therewith.

  Finally, as shown in FIG. 4G, the upper suction device 10 is raised and the correction work is completed. After that, the moving base 7 of the positioning unit 6 moves to a position immediately above the substrate 3 to be processed next, and the operations shown in FIG. Then, such operations are sequentially repeated, and when the correction operation is completed for all the substrates 3, printing is simultaneously performed on all the substrates 3 at that position.

  Thus, the printed substrate is lowered together with the lower suction device 5 and held on the printing table again. After the suction is released, the substrate is transferred to the next step.

  Next, a second embodiment of the present invention shown in FIGS. 5 to 7 will be described.

  This embodiment is a case where printing is simultaneously performed on a plurality of substrates as in the first embodiment, and a case where a plurality of substrates are aligned and held at a predetermined interval on a printing table.

  Thus, in the present embodiment, the substrate receiving recesses 11, 11 in the transport tray 12 provided with a plurality of substrate receiving recesses 11, 11, 11,. , 11... Are received, and a plurality of substrates 3 are arranged and held on the printing table 1 via the transport tray 12 at predetermined intervals. Further, the transport tray 12 in the present embodiment is provided with substrate receiving recesses 11, 11, 11... Aligned in 3 rows and 8 columns. Reference numeral 13 denotes a holding member for the transport tray 12 provided on the upper surface of the printing table 1.

Next, the operation of the substrate position and angle correction device 4 in this embodiment will be described.
FIG. 7A shows a state where the transport tray 12 is transferred and held on the printing table 1, and each substrate 3 is held in the substrate receiving recess 11 of the transport tray 12.

  Next, as shown in FIG. 7 (b), all the lower suction devices 5 corresponding to the respective substrates 3 are lifted to a predetermined position all at once, and the substrates 3 are sucked from the substrate receiving recesses 11 in the horizontal state. Push up. The lower suction device 5 stops at the position where the substrate 3 is pushed up, and maintains that state until all the substrates 3 are printed simultaneously.

  Next, as shown in FIG. 7C, the moving base 7 of the positioning unit 6 moves to a position immediately above one substrate 3, and the position of the substrate 3 and the angle confirmation marks 3 a and 3 a are read by the camera device 8. . Then, the position and angle of the substrate 3 are confirmed from the position and angle confirmation marks 3a and 3a of the substrate 3 read by the camera device 8 by the displacement determination device 9, and appropriateness that does not cause printing displacement corresponding to a preset mask. The degree of deviation is determined by collating with the position and angle.

  Next, as shown in FIG. 7D, the upper suction device 10 descends to suck the substrate 3. Then, as shown in FIG. 7E, the substrate 3 is sucked and raised to a predetermined position. At this position, the upper suction device 10 is based on the determination result by the displacement determination device 9 in the X-axis direction and the Y-axis. The deviation correction operation in the direction and θ direction is performed.

  Next, as shown in FIG. 7 (f), the upper suction device 10 descends again to stop sucking the substrate 3, and the lower suction device 5 sucks the substrate 3 in synchronization therewith.

  Finally, as shown in FIG. 7G, the upper suction device 10 is raised and the correction work is completed. After that, the moving base 7 of the positioning unit 6 moves to a position immediately above the substrate 3 to be processed next, and the operations shown in FIG. Then, such operations are sequentially repeated, and when the correction operation is completed for all the substrates 3 in one transport tray 12, printing is performed simultaneously on all the substrates 3 at that position, that is, above the transport tray 12. is there.

  Thus, the printed substrate is lowered together with the lower suction device 5 and held on the transport tray again. After the suction is released, the substrate is transferred to the next step.

It is a schematic explanatory drawing of 1st Embodiment of the position and angle correction apparatus of the board | substrate in the screen printer concerning this invention. It is an expansion perspective view of the principal part. It is the same top view which abbreviate | omitted and showed the positioning unit. FIG. It is a schematic explanatory drawing of 2nd Embodiment of the board | substrate position and angle correction apparatus in the screen printer which concerns on this invention. It is the same top view which abbreviate | omitted and showed the positioning unit. FIG. It is explanatory drawing of the conventional board | substrate support stand. It is a top view of a printing table in the case of holding a plurality of substrates on a printing table via a conventional conveyance tray. It is an enlarged plan view of the jig part. It is an expanded sectional view of the jig part. It is explanatory drawing of the state of the board | substrate in the board | substrate receiving recessed part of a conveyance tray.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printing table 2 Substrate support frame 3 Substrate 4 Substrate position and angle correction device 5 Lower suction device 6 Positioning unit 7 Moving stand 8 Camera device 9 Displacement determination device 10 Upper suction device 11 Substrate receiving recess 12 Transport tray

Claims (4)

  Connected to a vacuum device installed at a position directly below the substrate on the printing table that holds the substrate displaying the position and angle confirmation mark at a predetermined position on the upper surface, raised at an appropriate timing and pushed up the substrate A lower suction device that sucks and stops the substrate at a timing, a moving gantry that moves on the printing table at a predetermined timing on the printing table, and a position and angle confirmation that is installed on the moving gantry and displayed on the substrate The position and angle of the substrate are confirmed from the camera device that reads the mark for use and the position and angle confirmation mark of the substrate that is read by the camera device, and is compared with an appropriate position and angle corresponding to a preset mask. A displacement determination device that determines the degree and a device that is installed on the movable frame and lifts and lowers at an appropriate timing to suck and stop the substrate. A screen printing machine comprising a positioning unit including an upper suction device that performs a displacement correction operation in the X-axis direction, the Y-axis direction, and the θ-direction based on the determination result by the displacement determination device in a state where the substrate is sucked and raised The position and angle correction device of the substrate in   2. The screen according to claim 1, wherein a plurality of substrates are aligned and held on the printing table at a predetermined interval, and the movable frame can be moved in the X-axis direction and the Y-axis direction with a stroke that matches the interval between the plurality of substrates. A substrate position and angle correction device in a printing machine.   A plurality of substrate support frames that receive and support substrates from a conveyor are arranged at predetermined intervals on the printing table, and a plurality of substrates are aligned at predetermined intervals via the plurality of substrate support frames. 3. The apparatus for correcting the position and angle of a substrate in a screen printing machine according to claim 2, wherein the apparatus is held. A substrate is received in the substrate receiving recess in a transport tray in which a plurality of substrate receiving recesses having a through hole in the center are arranged at a predetermined interval, and the plurality of substrates are placed on the printing table via the transport tray at a predetermined interval. 3. The apparatus for correcting the position and angle of a substrate in a screen printing machine according to claim 2, wherein the apparatus is arranged and held by the apparatus.

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