KR20060009494A - Illuminating system for recognizing fiducial mark, chip mounter therewith, and method for mounting chips by use of complementary color - Google Patents

Abstract

The present invention provides an annular frame, and a red light, green light, blue light, which is provided in the annular frame for an illumination device for efficiently and quickly recognizing the physical mark, a component mounter having the same, and a component mounting method. The present invention provides a lighting apparatus for recognizing a physical mark, a component mounter having the same, and a component mounting method using complementary colors.

Description

Lighting system for recognizing fiducial mark, chip mounter therewith, and method for mounting chips by use of complementary color}

1 is a perspective view schematically showing a component mounter according to a preferred embodiment of the present invention.

Fig. 2 is a side view schematically showing the head of the component mounter according to the embodiment.

3 is a perspective view schematically showing a lighting device provided in the head of the component mounter according to the embodiment;

Fig. 4 is a sectional view schematically showing a modification of the lighting apparatus provided in the head portion of the component mounter according to the embodiment.

5 is a cross-sectional view schematically showing a lighting device provided in the head of the component mounter according to another preferred embodiment of the present invention.

6 is a conceptual view schematically showing a light path emitted from a lighting device provided in a head of a component mounter according to the embodiment.

7 is a flow chart illustrating a process of mounting a component by recognizing the Fducial Mark in accordance with the present invention.

<Description of the symbols for the main parts of the drawings>

1: Component mounter 2: Bed

3: guide rail 4: parts supply

5: first camera 6: X-axis operating mechanism

7: Y axis operating mechanism 8: Head

8a: nozzle 15a: second camera

15b, 25b: lighting device 16, 26: frame

17, 17: light emitting element 18, 28: light path changing unit

C: Component P: Printed Circuit Board

The present invention relates to a lighting device for recognizing a physical mark, a component mounter having the same, and a component mounting method using a complementary color, and more particularly, to an illumination device for recognizing a physical mark efficiently, quickly and accurately. It is related with the component mounting apparatus provided, and a component mounting method.

A component mounter is a device for mounting a component such as a semiconductor package on a printed circuit board (PCB). In recent years, printed circuit boards have high density and high functionality, and thus individual integrated circuit electronic components have high density and high functionality as well. As a result, the number of components mounted on the electronic component increases, and the spacing between the components becomes narrower, so that a fiducial mark indicating the mounting position of the components can be recognized more efficiently, quickly and accurately. It became more important.

In more detail, the fiducial mark is used to set a reference point when mounting a predetermined part on a printed circuit board. In other words, in a series of processes for mounting certain components on a printed circuit board, the fiducial mark is found and the relative position from the fiducial mark is calculated to determine the position where the component is to be mounted.

In this process, in the process of mounting a component on a printed circuit board, the process of finding the fiducial mark inputs an image of a printed circuit board photographed using a camera to a computer, and the computer may have a fiducial mark present in the printed circuit board image. After designating a region of interest as a region of interest, a template pattern having the same shape as the above-mentioned physical mark is set, and matching is performed from the upper left to the lower right by the template pattern in the region of interest. Try and find the center point of the best match.

The camera used in the above process is a black and white camera, and finds the fiducial mark by the difference in contrast. Therefore, as the difference between the amount of light irradiated to find the physical mark is reflected by the physical mark and the amount of light reflected by the periphery of the physical mark increases, the physical mark is efficiently, quickly and accurately found. I can make it.

On the other hand, the color of the fiducial mark and the color of the substrate on which the fiducial mark is displayed vary, and thus the peripheral portion of the fiducial mark and the fiducial mark according to the kind of the light source irradiated to the fiducial mark and the substrate and the like. The amount of light reflection at will be different. However, the conventional lighting apparatus that irradiates light to find the physical mark uses a monochromatic light source, that is, a light source that emits only light having one kind of wavelength, so that various colors of the physical mark and the substrate on which the medical mark is displayed are used. It was not possible to adequately cope with various colors such as, and as a result, the difference between the amount of light irradiated to find the fiducial mark and the amount of light reflected from the periphery of the fiducial mark If it is not large, there is a problem that it is impossible to find the fiducial mark quickly and accurately.

Disclosure of Invention The present invention has been made to solve various problems including the above problems, and an object of the present invention is to provide an illumination device for recognizing a physical mark efficiently, quickly and accurately, a component mounter having the same, and a component mounting method. do.

In order to achieve the above object and various other objects, the present invention is provided with an annular frame and a plurality of light emitting elements emitting red light, green light, blue light, white light or infrared light, which are provided in the annular frame. The present invention provides an illumination device for recognizing a physical mark.

According to another aspect of the present invention, the light emitting devices may be repeatedly arranged in a predetermined sequence according to the type of light emitted.

According to still another feature of the present invention, the light emitting devices may be arranged in multiple circles.

According to another feature of the invention, on the path of the light emitted from the light emitting elements, it may be provided with an optical path changing unit for changing the path of the light.

According to still another feature of the present invention, the illuminating device can emit light corresponding to the complementary color of the color of the peripheral portion of the physical mark.

According to still another feature of the present invention, the illumination device can emit light corresponding to the complementary color of the color of the physical mark.

The present invention also provides a component mounter, characterized in that provided with a lighting device for recognition of the above-mentioned fiducial mark in order to achieve the above object.

In order to achieve the above object, the present invention also provides the steps of inserting a substrate, recognizing the color of the substrate, irradiating the substrate with light corresponding to the complementary color of the substrate, and Recognizing the dual mark, mounting the component on the substrate when the physical mark is recognized in the step, and when the physical mark is not recognized in the step, the complementary color of the physical mark And a step of irradiating a corresponding light to the substrate to recognize a physical mark and mounting the component on the substrate.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view schematically showing a component mounter according to a first preferred embodiment of the present invention, FIG. 2 is a side view schematically showing a head portion of the component mounter according to the embodiment, and FIG. 3 is the embodiment. Is a perspective view schematically showing a lighting device provided in the head of the component mounter according to the present invention, and FIG. 4 is a cross-sectional view schematically showing a modification of the lighting device provided in the head of the component mounter according to the embodiment. .

1 and 2, the component mounter 1 guides the bed 2, the printed circuit board P to a predetermined position, and at the same time serves as a substrate support stage, and a printed circuit. The component supply part 4 which supports the various electronic components to be mounted on the board | substrate P, and the electronic component C supported by the said component supply part 4 are moved vertically to mount on the printed circuit board P, The head part 8 which adsorbs or detaches a component is provided.

The component mounter 1 includes a first camera 5 and a second camera 15a. The first camera 5 is mounted to be fixed to the bed 2, and the second camera 15a is fixed to the head part 8 and moves together with the head part 8.

In order for the nozzle 8a provided in the head portion 8 to pick up the electronic component C, the head portion 8 is supplied by the X-axis actuating mechanism 6 and the Y-axis actuating mechanism 7. After moving to (4), the head portion 8 is to pick up the electronic component (C). In order to adsorb the picked up electronic component C to the printed circuit board P, the head part 8 picked up the electronic component moves to the upper portion of the first camera 5 to pick up the picked up electronic component C. The state is grasped, and then the head 8 is moved onto the printed circuit board P. FIG. Thereafter, the second camera 15a photographs and recognizes a fiducial mark on the printed circuit board P on which the electronic component is mounted, and accordingly, the electronic component C causes the printed circuit board ( Mounted on P).

In this process, the illumination device 15b is provided at the bottom of the second camera 15a, thereby increasing the recognition speed and accuracy of the physical mark, and thus the component mounter 1 according to the first preferred embodiment of the present invention is provided. 3 and 4, a plurality of illumination devices 15b emitting red light, green light, blue light, white light, or infrared light, which are provided in the annular frame 16 and the annular frame 16, are provided. Two light emitting elements 17 are provided to perform this function. The cylindrical 19 frame is connected to the second camera 15a.

The operation principle of the lighting device 15b will be described in more detail as follows.

When white light is irradiated to a certain color, for example, an object that looks red, light of a wavelength corresponding to blue corresponding to the complementary color of red is absorbed by the object, and light of a wavelength corresponding to red is not absorbed to the object. Reflected, and the result is that the object appears red. As described above, the second camera 15a for recognizing the physical mark is a black and white camera, and thus the physical mark is recognized by the difference in contrast. Since the physical mark is recognized by the difference in contrast, the amount of light reflected by the physical mark and incident on the second camera 15a and the amount of light reflected by the peripheral portion of the physical mark and incident on the second camera 15a The larger the difference is, the better.

Therefore, for example, in order to recognize the physical mark by appearing brighter than the periphery of the physical mark, the amount of light reflected by the physical mark and incident on the second camera 15a is reflected by the periphery of the physical mark. The amount of light incident on the second camera 15a may be greater than that. In order to produce these results, a method of increasing the amount of light reflected by the physical mark or reducing the amount of light reflected by the periphery of the physical mark may be used.

In the former case, as described above, by irradiating light of the wavelength corresponding to the color of the medical mark, in the latter case by irradiating light of the wavelength corresponding to the complementary color of the color of the peripheral portion of the medical mark, As described above, the fiducial mark may appear brighter than the periphery of the fiducial mark so that the fiducial mark is recognized efficiently and accurately.

The method of irradiating light of a wavelength corresponding to the color of the physical mark or irradiating light of a wavelength corresponding to the complementary color of the color of the peripheral mark of the peripheral mark includes the annular frame 16 of the illumination device 15b. ) May be combined with the amount of light emitted by the plurality of light emitting elements 17 emitting red light, green light, blue light, white light or infrared light.

On the contrary, in order to make the physical mark appear to be darker than the peripheral part of the medical mark, the amount of light reflected from the medical mark and incident on the second camera 15a is reflected by the peripheral part of the medical mark. It is preferable to make it smaller than the amount of light incident on the second camera 15a. In order to produce these results, a method of reducing the amount of light reflected by the physical mark or increasing the amount of light reflected by the periphery of the physical mark may be used.

In the former case, as described above, by irradiating light of the wavelength corresponding to the complementary color of the color of the physical mark, in the latter case by irradiating light of the wavelength corresponding to the color of the peripheral portion of the fiducial mark, As described above, the physical mark may appear darker than the periphery of the medical mark, so that the medical mark can be recognized efficiently and accurately.

The method of irradiating light having a wavelength corresponding to the complementary color of the physical mark or irradiating light having a wavelength corresponding to the color of the peripheral mark of the fiducial mark includes the annular frame 16 of the illumination device 15b. ) May be combined with the amount of light emitted by the plurality of light emitting elements 17 emitting red light, green light, blue light, white light or infrared light.

In the above case, a plurality of light emitting elements 17 emitting red light, green light, blue light, white light, or infrared light, which are provided in the annular frame 16, are a series of constant orders depending on the type of light emitted. It can be repeated to be placed. For example, red light, green light, blue light, white light, infrared light, red light, green light, blue light, white light, and infrared light may be repeatedly arranged in a predetermined sequence. By arrange | positioning repeatedly in a fixed series in this way, uniform light can be irradiated to a physical mark and its peripheral part. Of course, it can also be an array of various orders other than the above. The same is true in the embodiments to be described later.

Meanwhile, referring to FIGS. 3 and 4, an optical path changing unit 18 for changing the path of the light may be provided on the path of the light emitted from the light emitting devices 17. In FIG. 3, the light path changing unit 18 is provided on the light emitting devices 17 so that the light emitting devices 17 are exposed. In FIG. 4, the light emitting devices 17 are not exposed. The light path changing unit 18 is provided in a wrapping form so as to surround the light path. The light path changing unit 18 emits or condenses the light emitted from the light emitting elements 17 in a direction of a physical mark which is located under the second camera 15a. 17) to increase the efficiency of the light extracted from. A more detailed description will be given later.

5 is a cross-sectional view schematically showing a lighting device provided in the head of the component mounter according to the second preferred embodiment of the present invention.

Referring to FIG. 5, the light emitting elements 27a and 27b provided in the annular frame 26 of the lighting device 25b are arranged in a double circle. As described above, the annular frame may include a plurality of light emitting devices, for example, light emitting devices emitting red light, green light, blue light, white light, ultraviolet light, and the like. In order to provide such a plurality of light emitting devices in the annular frame, since the size of the annular frame is limited, the plurality of light emitting devices 27a and 27b may be efficiently provided by being arranged in a double circle. Of course, it is also possible to be arranged in a plurality of circles more than two.

6 is a conceptual diagram schematically illustrating an optical path emitted from a lighting device provided in a head of a component mounter according to the embodiment.

Similarly to the lighting apparatus according to the first embodiment described above, the lighting apparatus according to the present embodiment also changes the path of the light on the path of the light emitted from the light emitting elements 27a and 27b provided in the lighting apparatus. The light path changing unit 28 may be provided.

Referring to FIG. 6, the light path changing unit 28 in the form of a convex lens or a prism is provided on the light emitting devices 27a and 27b to have a refractive index greater than that of air. As described above, light emitted from the light emitting elements 27a and 27b may be directed toward the center of the lighting device, thereby increasing light efficiency and recognizing the fiducial mark more accurately and efficiently.

7 is a flowchart illustrating a process of mounting a component by recognizing a physical mark according to the present invention.

When the substrate is inserted into the component mounter, the color of the substrate and the color of the physical mark on the substrate are recognized. Thereafter, the amount of light of the plurality of various light emitting elements provided in the lighting apparatus is determined so that the light corresponding to the complementary color of the substrate color is irradiated onto the substrate. In this case, the light quantity of each light emitting device for determining the complementary color and the like according to the color of the substrate and the physical mark may be previously determined to be automatically determined in a database.

After the amount of light of each light emitting device is determined as described above, light corresponding to the complementary color of the color of the substrate may be irradiated onto the substrate. In this case, since the substrate is dark and the fiducial mark on the substrate is relatively bright, the difference mark may allow the fiducial mark to be recognized. When the fiducial mark is recognized through this process, the component is mounted based on the position of the fiducial mark.

On the other hand, in the case of not recognizing the fiducial mark on the substrate by irradiating light corresponding to the complementary color of the substrate, the amount of light of the respective light emitting elements so that the complementary light of the color of the fiducial mark is irradiated After this determination, light of complementary color of the color of the fiducial mark may be irradiated onto the substrate. When the above light is irradiated, the fiducial mark looks dark and the substrate looks relatively bright, so that the fiducial mark is recognized through the contrast. When the fiducial mark is recognized through this process, the component is mounted based on the position of the fiducial mark.

In the above embodiments, only the component mounter has been described, but the lighting apparatus as described above may be used in various apparatuses that need to recognize any mark in addition to the component mounter.

According to the lighting apparatus for the recognition of the fiducial mark of the present invention made as described above, a component mounting apparatus having the same, and a component mounting method using complementary colors, the following effects can be obtained.

First, by providing a plurality of light emitting devices that emit light of various wavelengths, rather than monochromatic light, as a light source of the lighting device, it is possible to selectively emit light of various wavelengths.                     

Second, the plurality of light emitting elements provided in the lighting device are repeatedly arranged in a predetermined sequence according to the type of light emitted, thereby increasing the uniformity of the light emitted from the lighting device.

Third, the plurality of light emitting elements may be provided in the lighting apparatus in a plurality of circles, so that the plurality of light emitting elements may be efficiently provided in the lighting apparatus.

Fourth, by irradiating light corresponding to the complementary color of the color of the physical mark, the physical mark may appear relatively darker than the periphery of the medical mark, thereby increasing the recognition speed and accuracy of the medical mark.

Fifth, by irradiating light corresponding to the complementary color of the peripheral part of the physical mark, the physical mark may appear relatively brighter than the peripheral part of the medical mark, thereby increasing the recognition speed and accuracy of the medical mark. have.

Sixth, the optical path changing part is provided on the plurality of light emitting elements of the lighting device, thereby increasing the efficiency of the lighting device.

Seventh, by using a component mounter having a lighting device having the structure described above, it is possible to improve the accuracy and efficiency of the component mounting by increasing the recognition speed and accuracy of the physical mark.

Although the present invention has been described with reference to the embodiments shown in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (8)

Annular frame; And And a plurality of light emitting elements emitting red light, green light, blue light, white light, or infrared light, which are provided in the annular frame. The method of claim 1, The light emitting device is a lighting device for the recognition of the physical mark, characterized in that arranged repeatedly in a predetermined series according to the type of light emitted. The method of claim 1, The light emitting device is a lighting device for the recognition of the fiducial mark, characterized in that arranged in a plurality of circles. The method of claim 1, And an optical path changing unit configured to change the path of the light on a path of the light emitted from the light emitting devices. The method of claim 1, The lighting apparatus emits light corresponding to the complementary color of the color of the periphery of the physical mark. The method of claim 1, The lighting apparatus emits light corresponding to the complementary color of the color of the physical mark. A component mounter comprising a lighting device for the recognition of the fiducial mark according to any one of claims 1 to 6. (a) inserting a substrate; (b) recognizing the color of the substrate; (c) irradiating the substrate with light corresponding to the complementary color of the substrate; (d) recognizing the fiducial mark; (e) mounting a component on the substrate when the physical mark is recognized in the step (d); (f) If it is not recognized in step (d), the substrate is irradiated with light corresponding to the complementary color of the color of the physical mark to recognize the physical mark, and the component is mounted on the substrate. Component mounting method comprising a.

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