KR19990039797A - Appearance inspection method and device for tape carrier package parts - Google Patents

Abstract

The present invention relates to a method and apparatus for inspecting the appearance of a tape carrier package part. An apparatus for inspecting external appearance of a tape carrier package component according to the present invention includes an image processing apparatus installed at an upper end to process an image, a first camera for obtaining a front illumination image for providing an image signal to the image processing apparatus, and the first camera. A fiber ring illuminator installed at the bottom of the camera and a tape carrier package part installed at the bottom of the tape carrier package part and simultaneously performing a front lighting function and a back lighting function, and installed at the bottom of the illuminator to obtain a back lighting image. Characterized by the second camera is installed has the advantage that a high-speed inspection process is made.

Description

Appearance inspection method and device for tape carrier package parts

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for inspecting external appearance of a tape carrier package part, and more particularly, to an apparatus and method for inspecting external appearance of a tape carrier package part by an image processing apparatus.

Appearance inspection apparatus for tape carrier package parts is used to mass-produce parts such as driving semiconductor chips such as liquid crystal display devices by mounting semiconductor chips on tape-type films, and the film of the tape carrier package parts is a non-contact visual recognition method. And an apparatus for inspecting a state of a chip mounted on the film.

1 shows a configuration of a method and apparatus for inspecting appearance of a conventional tape carrier package part. Referring to the drawings, a conventional method and apparatus for inspecting external appearance of a tape carrier package component is installed on top of the image processing apparatus 11 for processing an image and a recognition CCD for providing image data to the image processing apparatus 11. (Charge Coupled Device) The first illuminator 13a and the first illuminator 13a in the form of a diffuse fiber ring illuminating the camera 12a and the camera 12a to recognize the image are illuminated. A tape carrier package component (10) on which the chip (10a) is mounted; And a second illuminator 13b in the form of a transmission fiber ring installed at a lower end of the tape carrier package component 10.

2 shows the configuration of the tape carrier package component 10. The tape carrier package part 10 has a width of about 35 mm to about 70 mm and a length of about 20 m. In addition, the tape carrier package part 10 includes a rectangular perforation hole 10d and one surface of the tape carrier package part 10 which are continuously drilled to enable the tape carrier package part 10 to be transferred by the drilling. Resin 10b for protecting the chip 10a is coated on the back surface of the chip 10a mounted on the chip 10a. In addition, the illuminators 13a and 13b are provided with shutters 15 for blocking the light from the halogen lamp 14 in the middle of the ring-guided path through the optical fiber. However, since the shutter 15 is limited in durability due to mechanical characteristics, its shutter has a short lifespan.

The conventional method and apparatus for inspecting the appearance of a tape carrier package component having the above structure operates as follows.

First, when power is applied, light is emitted from the high-pressure halogen lamp 14, and light is first supplied to the first illuminator 13a by the shutter 15 to irradiate light on the upper surface of the tape carrier package component 10. do. The image reflected by the light is incident on the camera 12a and the image data is input to the image processing apparatus 11. Then, the light emitted from the halogen lamp 14 is switched by the shutter 15, that is, the light of the first illuminator 13a is cut off and supplied to the second illuminator 13b to supply the tape carrier package part 10. Irradiate the light on the lower surface. As a result, the fiber ring illumination of the first illuminator 13a and the second illuminator 13b performs a front illumination function on the surface on which the resin 10b is applied, and a rear surface on the surface on which the opposite chip 10a is mounted. The lighting function will be performed.

The image reflected by the light of the back light is incident on the camera 12a and the image data is input to the image processing apparatus 11. The image data input by the light of the first illuminator 13a and the image data input by the light of the second illuminator 13b are stored in the vision recognition computer of the image processing apparatus 11, and this image data The data is used to determine the amount or failure of the chip 10a component and the mounting state, which are mounted on the tape carrier package component 10, by the recognition program. That is, in the recognition program, the area of the component shown in the photographed image may be compared and analyzed to determine whether the tape carrier package part 10 is abnormal.

In this case, the detection defect that can be inspected with the image obtained by the first illuminator that is the front light becomes the presence or absence of an abnormality such as foreign matter (B) or a missing (C) of the lead 10e of the chip 10a. In addition, the detection defect by the 2nd illuminator 13b becomes a tear defect A of a tape carrier package component, the hole of the tape carrier package component 10, etc. generate | occur | produce.

In the conventional apparatus as described above, the operation of turning on and off the two illuminators 13a and 13b must be performed and the image processing must be performed accordingly, thereby increasing the overall processing time. In addition, since the second illuminator 13b, which is a back light, requires a large amount of light, a mechanical shutter 15 that blocks light in the middle in the process of drawing light from the halogen light source 14 into a ring shape through an optical fiber. ), The device is complicated because of the fast light cutoff, and is limited by the life of the shutter 15. In addition, when the resin 10b is applied to the tape carrier package part 10 on the lower surface instead of the upper surface, the camera 12a needs to be moved downward, which requires complicated adjustment work during setup.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a method and apparatus for inspecting the appearance of a high speed tape carrier package part.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view for explaining an image recognition method of an appearance inspection apparatus of a conventional tape carrier package part.

2 is a plan view schematically showing a film of a tape carrier package component, a semiconductor chip mounted on the film, and various defects;

Figure 3 is a schematic diagram of the appearance inspection apparatus of the tape carrier package component to which the first embodiment of the present invention is applied.

Figure 4 is a schematic diagram of the appearance inspection apparatus of the tape carrier package component to which the second embodiment of the present invention is applied.

Fig. 5 is a schematic diagram of an appearance inspection apparatus of a tape carrier package part to which a third embodiment of the present invention is applied.

<Explanation of symbols for main parts of drawing>

10.Tape Carrier Package Parts

10a ... Chip 10b ... Resin

11 ... Image processing device 12a ... First camera

12b ... second camera 13 ... illuminator

41a ... first vision board 41b ... second vision board

In order to achieve the above object, the apparatus for inspecting the appearance of a tape carrier package component according to the present invention includes an image processing apparatus installed at an upper end to process an image, and a front illumination image for providing an image signal to the image processing apparatus. A fiber ring illuminator installed on a first camera, a tape carrier package part installed at a lower portion of the first camera, and a tape carrier package part and simultaneously performing a front lighting function and a back lighting function; And a second camera installed to obtain a back lit image.

In addition, the first and second cameras are each connected to a separate image processing board, characterized in that further comprising the processing speed is multiplied. In addition, the illuminator is further characterized in that it is installed only in one of the upper, lower with the tape carrier package parts therebetween. In addition, the illuminator is characterized in that it further comprises a top and bottom each one with the tape carrier package parts therebetween, so as to be adjusted on / off as necessary.

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

A method and apparatus for inspecting the appearance of a tape carrier package part according to the present invention is shown in Figs. Here, the same reference numerals as in the above-described drawings indicate the same components.

3 shows an appearance inspection apparatus of a tape carrier package part according to a first preferred embodiment of the present invention. Referring to the drawings, it is provided at the lower portion of the image processing apparatus 11 to obtain an image processing apparatus 11 installed at the top and processing forward image data provided to the image processing apparatus 11. A tape carrier installed at a lower end of the illuminator 13 and a fiber ring illuminator 13 which simultaneously performs a front illumination function and a rear illumination function installed at a lower portion of the first camera 12a and the first camera 12a. A package part 10 and a second camera 12b installed at a lower end of the tape carrier package part 10 to obtain a back lighting image.

The image processing apparatus 11 includes two image processing boards 41a and 41b, and a monitor 46 for presenting the processing result to an operator is installed in connection with the image processing apparatus 11.

In addition, the tape carrier package part 10 includes a rectangular perforation hole (not shown) and the tape carrier package part 10 which are continuously drilled to enable the tape carrier package part 10 to be transferred by the drilling. Resin 10b protecting the chip 10a is coated on the back surface of the chip 10a mounted on one surface of the chip 10a.

The external inspection method of the tape carrier package part according to the present invention performed as the above-described apparatus is first performed by using an illuminator 13 located on the upper part of the tape carrier package part 10 or positioned below the tape carrier package part 10. Illuminating the tape carrier package component (10); Photographing the front and back images of at least two cameras (12a) (12b) at a predetermined portion of the tape carrier package component (10) for inspection; And comparing the at least two image data photographed by the cameras 12a and 12b to determine the state of the payload on the tape carrier package component 10 and the tape carrier package component 10. It is done.

Apparatus for inspecting the appearance of the tape carrier package part according to the first embodiment of the present invention having the above structure operates as follows.

The illuminator 13 performs the front lighting function and the back lighting function at the same time and is always lit. After the tape carrier package part 10 is in progress, when the resin 10b coating portion stops immediately under the first camera 12a, the light of the illuminator 13 is reflected from the front of the tape carrier package part 10. Accordingly, the upper first camera 12a acquires the image by the front light and the lower second camera 12b obtains the image by the back light, so that it is possible to determine whether there is a defect in the part to be inspected. Each image data obtained in this way is stored in a computer for recognition of the image processing apparatus, and the image data is stored in the tape carrier package part 10 by the recognition program and the quantity or failure of the mounting state, that is, the tape carrier It is the data for judging defects such as tearing of the package part film. In other words, the recognition program analyzes the area of the component and the like shown in the captured and input image image, and the processing result is presented to the monitor 46 for output or provided as a signal to an external device (not shown).

Next, FIG. 4 shows a case where the resin coated surface is fed downward as a second preferred embodiment of the present invention.

In this case, only the illuminator 13 can be moved downward. When changing the position of the camera as in the related art, the process of adjusting or positioning the camera is complicated, but only moving the fiber ring illuminator 13 downward. This can be done with a simple operation, reducing the device setup time. Here, the fiber ring illuminator 13 which performs the front lighting function and the back lighting function at the same time is installed at the lower side, which is different from the first embodiment, and the other arrangement is the same as the first embodiment.

In addition, as shown in the first embodiment, when two vision boards 41a and 41b are installed inside the image processing apparatus to simultaneously process an image by front illumination and an image by rear adjustment, the time required for the entire inspection is halved. It can be reduced to increase the device performance.

The external inspection method and apparatus of the tape carrier package part according to the second embodiment of the present invention having the structure as described above operate as follows.

First, when power is applied to the halogen lamp 14, the light is emitted from the high-pressure halogen lamp 14, the light is supplied to the illuminator 13, which is a fiber ring light to perform the front and back lighting function. The light is irradiated on the lower surface of the tape carrier package part 10 'to obtain a forward illumination image. The image reflected by the light is incident on the second camera 12b and the image signal is input to the second vision board of the image processing apparatus 11. Thereafter, the light by the front light is projected onto the upper surface, which is the rear surface, and supplies the image by the back light to the first camera 12a and is input to the first vision board of the image processing apparatus 11.

As such, the fiber ring lighting machine performs a front lighting function on the resin coated surface and a back lighting function on the opposite chip surface.

The input image signal is stored in two vision boards 41a and 41b, and the image data is used to determine the amount or failure of the component and the mounting state of the component mounted on the tape carrier package component 10 'by a recognition program. It becomes data. That is, in the recognition program, the tape carrier package component 10 ′ is judged to have an abnormality by analyzing the image signals input from the front and the back of the area and the like of the parts shown in the captured image.

In this case, defects that can be inspected with the image obtained by the front light are torn defects in the tape carrier package part or holes in the tape carrier package part, and detection defects caused by the back lighting are foreign matter or chip lead abnormality. Becomes

In addition, a third preferred embodiment of the present invention is shown in FIG.

This is a device and method that responds more quickly than in the case of the first and second embodiments described above. When the illuminators 13a and 53b are installed one at a time and one at the top, the upper surface of the resin 10b is applied upward. The illuminator 13a is turned on and the lower illuminator 13b is turned off. On the contrary, when the resin 10b coated surface comes down, the lower illuminator 13b is turned on and the upper illuminator 13a is turned off. This additional lighting installation greatly reduces the time required to set up a device in the event of a change in the working environment, improving productivity.

That is, this third embodiment requires two illuminators 13a and 13b to selectively perform the lighting function by using the on / off switch 57, but only the operation is required at the initial work environment setting. The reliability of the device is improved by eliminating the on / off operation of the device. Since there is no operation of the fixture during the operation, the time required for this is reduced, thereby improving the processing speed.

The appearance inspection apparatus of the tape carrier package component according to the present invention has the following effects.

first; High speed inspection process is achieved.

second; Durability is improved by eliminating the need for a separate shutter.

third; Device adjustment time is reduced due to model change.

The present invention has been described with reference to one embodiment shown in the accompanying drawings, which is illustrative, and those skilled in the art will understand that various modifications and equivalent embodiments are possible therefrom. . Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (5)

An image processing apparatus installed at an upper end to process an image; A first camera for obtaining a front illumination image for providing an image signal to the image processing apparatus; A fiber ring illuminator installed at a lower portion of the tape carrier package part and a tape carrier package part installed at a lower portion of the first camera, and performing a front lighting function and a rear lighting function at the same time; Apparatus for inspecting the appearance of the tape carrier package component, characterized in that the second camera is installed at the bottom of the illuminator and installed to obtain a back lighting image. The apparatus of claim 1, wherein the first and second cameras are connected to separate image processing boards so as to double the processing speed. The apparatus of claim 1, wherein the illuminator is installed only at one of the upper and lower portions of the tape carrier package part therebetween. The apparatus of claim 1, wherein the illuminator is installed one by one above and one below with the tape carrier package part therebetween, so that the illuminator is adjusted on and off as necessary. . Photographing the predetermined portion of the tape carrier package component to be inspected with at least two cameras at positions above and below the tape carrier package component; The illuminator being positioned on top of the tape carrier package part or positioned below the tape carrier package part to irradiate light on the tape carrier package part; Comparing the at least two image data photographed by the camera to determine the quantity and defect by comparing the state of the payload and the program on the tape carrier package part, and inspecting the external appearance of the tape carrier package part. Way.