JPH0320099A - Device and method of screen printing - Google Patents

Abstract

PURPOSE:To acquire a screen printing mean having improved operating efficiency by mounting a mask observing camera on an XYZ table device integrally, which observes a reference point provided to a mask. CONSTITUTION:A mask observing camera 25 to observe reference points A2, B2 provided to a mask 33 is installed to an XYZ table device 1 integrally. The XYZ table device 1 is driven to move the camera 25 below the mask 33, and the reference points A2, B2 of the mask 33 are observed. The XYZ table device 1 is driven to move a substrate 24 below a substrate observating camera 31 and the reference points A1, B1 of the substrate 24 are observed. The XYZ table device 1 is driven to match the reference points A1, B1 of the substrate 24 to the reference points A2, B2 of the mask 33, and the substrate 24 is moved below the mask 33. Then, the substrate 24 is made to rise and is brought into contact with a lower side of the mask 33 by pressing. A squeegee 34 is slid and cream solder is printed. Thereby, it is possible to improve operating efficiency of screen printing.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a screen printing device and a screen printing method, and the present invention relates to a screen printing device and a screen printing method. is made to match the reference point of the mask, and cream solder is printed on the circuit pattern of the board.

(Prior Art) Before mounting electronic components such as IC chips, capacitor chips, and resistor chips on a board, cream solder is printed on the circuit pattern of the board using a screen printing device. FIG. 2 shows a conventional screen printing device, in which 100 is an XYZ table device, and an X table 10
1. It is constructed by stacking a Y table 102, a rotary table 103, and a Z table 104. 105 is a board positioned on the Z table 104, and the motor MXI
, MYI and actuator MZI, XY
It moves in the Z direction, and also moves in the θ direction (
horizontally).

107 is a board observation camera, which is mounted on the XYZ table device 10B. 109,110.111 is
X table, Y table, Z table, MX2 respectively
, MY2, and MZ2 are motors. 1l2 is a screen device, which includes a mask 114 supported on a support stand 113;
Ya, I've been warned by Squeegee 115. 116 is mask 1
This is a circuit pattern hole shaped like 14. Next, we will explain the operation. To print cream solder on the substrate 105, first move the camera 107 above the mask 114, observe the reference points A2 and B2 provided on the mask 114,
Observe the position of the mask 114 in the XYθ directions. In this case, in order to prevent the squeegee 115 from interfering with the observation by the camera 107, the squeegee 115 must be moved upward or to the side by a device (not shown).

Next, the camera 107 is moved above the substrate 105, and the reference point AI. Observe Bl and set this reference point A
The positions of I and Bl in the XYθ directions are detected.

After observing the positions of the mask 114 and the base Vi 105 in this way, drive the motors MXI, MYI, Mθ to align the reference points A1, B1 of the substrate 105 with the reference points A2, B2 of the mask 114. , move the substrate 105 directly below the mask 114, then drive the actuator MZ1 to raise the base Fi 105, press the substrate 105 against the lower surface of the mask 114, and then slide the squeegee 115 to remove the substrate 105. Print cream solder on. (Problems to be Solved by the Invention) However, the above conventional device had the following problems. (B) Since two XYz table devices 100 and 108 are required, one for the substrate 105 and one for the camera 107, the device becomes large and complicated.

(Mouth) When observing the mask 114 with the camera 107, so that the squeegee 115 does not obstruct the camera 107.
A device is required to move the squeegee 115 upward or to the side. (c) The camera 107 is connected to the board 105
The stroke in the X direction becomes long, and the work efficiency decreases accordingly.

Therefore, an object of the present invention is to provide a screen printing means that solves the problems of the above-mentioned conventional means. (Means for Solving the Problems) For this purpose, the present invention provides an XYZ table device for positioning a board, a board observation camera for observing a reference point provided on this board, and a mask and a squeegee to detect the circuit of this board. A screen printing device is composed of a screen device for printing cream solder on a pattern, and a mask observation camera for observing reference points provided on the mask is integrally installed in the XYZ table device.

(Operation) According to the above structure, the reference point of the mask is observed by driving the XYZ table device and moving the camera integrated therewith below the mask. Also XY
Drive the Z table device to move the board below the board observation camera and observe the reference point of the board. Next, in order to match the reference point of the substrate with the reference point of the mask, the XYZ table device is driven to move the substrate below the mask, and then the substrate is raised and pressed against the lower surface of the mask, and the squeegee is slid. to print cream solder.

(Example) Next, embodiments of the present invention will be described with reference to the drawings.

Fig. 1 is a perspective view of the screen printing apparatus, and Fig. 2 is a front view of the screen printing apparatus. The warning comes from the screen device 3 installed at the The XYZ table device 1 has an X table 5, a Y table 6. The rotary table 7 and the Z table 8 are arranged in stages. The X table 5 has a base plate 4
The motor MX. It reciprocates in the X direction by the feed screw l3. The Y-table 6 is placed on a Y-direction rail l5 provided on the X-table 5 via a slider 16.
Motor MY. It reciprocates in the Y direction by the feed screw l7.
The rotary table 7 has a corner thereof connected to Y via the rotary shaft portion l8.
It is rotatably placed on table 6. Further, a motor Mθ and a feed screw 19 are provided on the Y table 6. 20 is a nut portion screwed onto the feed screw 19; 2l;
is a roller attached to the tip of an arm 22 extending from the rotary table 7 and fitted into the nut portion 20. As shown in FIG.

Therefore, when the motor Mθ is driven and the nut portion 20 slides along the feed screw l9, the rotary table 7 is moved to the shaft portion 18.
Rotate horizontally around . 2 table 8 is attached to a certain actuator MZ from a cylinder provided in the center of rotary table 7. 23 is a guide rod portion. 24 is a substrate positioned on the Z table 8, and a reference point AI.24 is positioned on the Z table 8. B1 is provided. Reference numeral 25 denotes a mask observation camera, which is integrally attached to the side of the Y table 6.

The substrate observation device 2 is configured by attaching a substrate observation camera 3l to a support 30, and the reference point Al of the substrate 24 that has been moved below the camera 31. Observe Bl from above.

The screen device 3 includes a mask 33 supported by a frame 32 and a mask 33 driven by a drive device (not shown).
The mask 33 is protected from the squeegee 34 sliding on it, and the mask 33 is provided with reference points A2 and B2. Reference numeral 35 designates pattern holes opened in the mask 33.

This screen printing device consists of the above-mentioned structure,
Next, the operation will be explained.

The camera 25 is moved below the mask 33 by driving the motor MX (see the broken line in FIG. 2), and then the motor MX. M
By driving Y and moving the camera 25 in the X and Y directions, two reference points A2 and 82 of the mask 33 are observed. Next, drive the motor MX to move the board 24 to the camera 31.
, and then drive the motors MX and MY to move the substrate 24 in the X and Y directions, thereby moving the substrate 24 from the two reference points AI. Observe Bl (see dashed line in Figure 2)
．． Next, the substrate 24 with respect to the mask 330 reference points A2, B2
Reference point AI. Calculate the positional deviation of Bl in the xyθ directions. Such calculations and control of each motor are performed by a control device such as a computer. Next, each motor MX. MY, M
The substrate 24 is moved directly below the mask 33 by driving θ. Next, the actuator MZ is driven to raise the substrate 24 and press it against the lower surface of the mask 33, and then the squeegee 34
to print cream solder on the circuit pattern of the board 24 (see the chain line in FIG. 2). Once you have finished printing,
The substrate 24 returns to its original position and is transported to the next process by a conveyor (not shown). (Effects of the Invention) As explained above, the present invention provides an XY
The XYZ table device is equipped with a Z table device, a board observation camera for observing reference points provided on this board, and a screen device for printing cream solder on the circuit pattern of this board using a mask and a squeegee. Since the mask observation camera that observes the reference points provided on the mask is integrally attached, only one XYZ table device needs to be installed for the board, and the mask observation camera can be attached to the XYZ table device. Since the mask is integrally attached to the table and the mask is observed from below, the squeegee does not interfere with the camera's observation, thus eliminating the need for a device to move the squeegee upward or to the side. Furthermore, when observing a mask with a camera, the movement stroke of the camera is small, which has the effect of improving work efficiency.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a perspective view of a screen printing device, FIG. 2 is a front view, and FIG. 3 is a perspective view of a conventional device. 1...XYZ table device 2...Screen device 24...Substrate 25...Mask observation camera 31...Substrate observation camera 33...Mask 34...Squeegee AI. Bl... Reference point of substrate A2, B2... Reference point of mask

Claims (2)

[Claims] (1) Equipped with an XYZ table device for positioning the board, a board observation camera for observing reference points provided on the board, and a screen device for printing cream solder on the circuit pattern of the board using a mask and squeegee, Above X
A screen printing apparatus characterized in that a mask observation camera for observing a reference point provided on the mask is integrally attached to a YZ table apparatus. (2) After moving the mask observation camera integrally provided on the XYZ table device below the mask of the screen device and observing the reference point provided on this mask, the camera was positioned on this XYZ table device. The substrate is moved below the substrate observation camera to observe the reference point provided on the substrate, and then the XYZ table device is driven to align the reference point of the substrate with the reference point of the mask. The method is characterized in that the mask is moved below, the board is then raised and pressed against the bottom surface of the mask, and a squeegee is slid on the mask to print cream solder on the circuit pattern of the board. Screen printing method.