JP2007163873A - Contaminant removing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remove contaminant which is impossible or hard to see from a terminal section of an image display panel, before mounting a chip. <P>SOLUTION: A contaminant removing method is a method for performing removing process for removing an organic substance which emits fluorescent by an emission process for emitting excited light to a terminal section of the image display panel, and electrolyte in which the organic substance is used as solute, as the contaminant at least for the terminal, from the terminal section. Thereby, as an existence position is informed by the contaminant which is impossible or hard to see by coloring for itself, the contaminant is easily and speedily removed and it is prevented that the terminal section of the image display panel is disconnected or short-circuited. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for removing pollutants, and in particular, from a terminal portion where terminals are formed in an image display panel such as a liquid crystal display panel, such as transparent saliva and sweat, invisible substances such as fine skin and dandruff. The present invention relates to a method for removing contaminants that are preferably used to remove contaminants that cause disconnection of terminals, such as substances that are difficult to visually recognize.

  In general, in an image display panel such as a liquid crystal display panel in which liquid crystal is sandwiched between two glass substrates having different lengths, various terminals are formed on terminal portions of the long glass substrate. Here, for the terminals of this image display panel, there are inorganic substances such as dust and dust, organic substances generated from the human body such as skin, human hair and dandruff, and pollutants composed of electrolytes such as sweat and saliva containing the organic substances or inorganic substances. If it adheres, the transparent electrode connected to the terminal during energization may easily corrode and eventually lead to disconnection or short circuit. Therefore, the image display panel has been manufactured with great care (see Patent Document 1).

JP 2005-121703 A

  However, no matter how much care is taken, it is inevitable that contaminants will slightly adhere to the terminals, which may adversely affect the terminals of the fine-pitch image display panel. It is necessary to individually remove contaminants from the terminal portions of the image display panel. Here, in the work of removing contaminants, inorganic contaminants are easy to detect visually, but the skin and dandruff that are organic contaminants are fine, and the organic contaminant contaminants such as sweat and saliva Since the electrolyte is transparent, even if an optical microscope is used, light passes through the contaminants by the strong light source, and visual confirmation by the optical microscope cannot be performed. Therefore, it has been difficult to completely remove the contaminant from the terminal portion of the image display panel.

  Even if a chip such as an IC is mounted on the terminal of the image display panel and the entire image display panel is cleaned by a wet cleaning method, if contaminants adhere to the terminal before mounting the chip, the chip is mounted immediately after mounting the chip. At the same time, since the contaminants are sealed by the curing of the liquid resin or the resin cover, the sealed contaminants cannot be washed.

  Therefore, the present invention has been made in view of these points, and removal of contaminants that can easily and quickly remove contaminants that are invisible or difficult to visually recognize from the terminal portion of the image display panel before mounting the chip. Its purpose is to provide a method.

  In order to achieve the above-described object, the pollutant removal method of the present invention includes, as a first aspect, an irradiation step of irradiating a terminal portion of an image display panel on which a terminal is formed with excitation light, an organic substance, an inorganic substance, and It includes a removal step of removing an organic substance that emits fluorescence by receiving excitation light in at least an irradiation step among pollutants made of an electrolyte having an organic or inorganic substance as a solute and an electrolyte having an organic substance as a solute from a terminal portion. Yes.

  According to a second aspect of the present invention, in the method for removing a contaminant according to the first aspect, the irradiation step and the removal step are performed using a fluorescence microscope.

  According to the first aspect of the present invention, a contaminant that is invisible or difficult to visually recognize is colored and notified of its location, so that the contaminant can be easily and quickly removed. Thereby, there is an effect of preventing the terminal portion of the image display panel from being disconnected or short-circuited.

  According to the second aspect of the present invention, an organic physical pollutant that develops color can be specified, and an inorganic physical pollutant that does not develop color can be visually recognized. Therefore, not only an organic physical pollutant but also an inorganic physical pollutant and an inorganic substance Electrolytic pollutants that contain solutes can be identified during the same operation and easily removed.

  Hereinafter, an embodiment of the pollutant removal method of the present invention will be described.

  In the contaminant removal method of this embodiment, the irradiation process and the removal process are performed by using the excitation light irradiation means and the contaminant removal means.

  As excitation light irradiation means, after irradiating organic substance pollutants with light (excitation light) of a specific wavelength such as ultraviolet rays, radiation, and X-rays to bring the pollutants into an excited state, they are emitted when returning to the ground state. An apparatus that can detect fluorescence generated as energy is used. In the excitation light irradiation means of the present embodiment, a fluorescence microscope having both a function of irradiating excitation light and a function as a microscope is used. This fluorescent microscope mainly includes a light source, a mirror unit, an objective lens, and the like.

  As the light source, a low-pressure mercury lamp or a halogen lamp is used.

  As the mirror unit, a unit including an excitation filter, a dichroic mirror, and an absorption filter is used. In the present embodiment, three types of mirror units or fluorescent broadband U excitation mirror units related to U excitation, B excitation, and G excitation are used. U excitation refers to excitation by ultraviolet rays having a wavelength of 330 nm to 380 nm. Similarly, B excitation refers to excitation by a blue line having a wavelength of 420 to 490 nm, and G excitation refers to excitation by a green line having a wavelength of 510 to 560 nm.

  As the objective lens, since the fluorescent image of the organic physical contaminant is dark, a lens that has high light condensing power and ultraviolet transmittance but does not cause autofluorescence or solarization is used. In the present embodiment, a dry system objective lens (metal objective lens) is used. This dry objective lens has a visual field range of at least 20 to 50 times, and preferably has a visual field range of 10 to 200 times.

  Further, as the contaminant removal means of this embodiment, a manipulator or a human hand that holds a cotton swab that does not contain bases and a cleaning agent for electronic parts such as ethanol is used.

  In the fluorescence microscope of the present embodiment, it is preferable that an image display means having a digital camera and a monitor is provided in order to display an image of an observation object (terminal portion of image display panel and contaminant). . In addition, a fluorescence spectrometer is preferably provided in order to identify the contaminant. Furthermore, in order to improve the working efficiency, it is preferable that an automatic feeding means for automatically feeding a stage on which the observation object of the fluorescence microscope is placed by a motor with a speed adjusting function is provided.

  Next, the effect | action by the removal method of the contaminant of this embodiment is demonstrated using FIG. Here, FIG. 1 shows an emission spectrum obtained by irradiating the skin, saliva, sweat, human hair and dandruff attached to the terminal portion of the image display panel with excitation light. Note that skin, saliva, sweat, human hair, and dandruff are main contaminants for the terminal portion of the image display panel.

  When an image display panel on which no chip is mounted is formed in the manufacturing process of the image display panel, it is observed using a fluorescence microscope whether contaminants are attached to the terminal portion of the image display panel. When excitation light is irradiated to the terminal part of the image display panel by a fluorescence microscope, a part of the pollutant is an organic substance (skin, human hair, dandruff, etc.) or a liquid electrolyte (sweat or Liquid such as saliva), and emits fluorescence by reciprocating between the excited state and the ground state. As a result, even if the contaminant is transparent or fine, it is notified by self-emission whether the contaminant irradiated with the excitation light exists in the terminal portion of the image display panel. Whether it has adhered can be easily and quickly detected visually.

  In addition, since three types of mirror units for U excitation, B excitation and G excitation or a fluorescent broadband U excitation mirror unit are used as the mirror unit of the fluorescence microscope, it is possible to detect a wide range of peak wavelengths of organic pollutants. Can do. For example, as shown in the experimental results of FIG. 1, it is clear that the color peak wavelength of skin, sweat, human hair, and dandruff is about 450 nm, and the color peak wavelength of saliva is about 550 nm. In addition, the detected wavelength band is different between saliva and other major contaminants. Therefore, by using a suitable mirror unit selected from three types of mirror units according to their peak wavelength, or a single fluorescent broadband U excitation mirror unit that detects fluorescence at a broadband wavelength, It can be detected reliably.

  Furthermore, when three types of mirror units related to U excitation, B excitation, and G excitation are selectively used, an image is displayed by B excitation and G excitation while detecting a pollutant emitting light blue or dark blue by U excitation. Residues of the photoresist used for panel manufacture can be detected.

  At the time of detection by this fluorescence microscope, if the magnification of the objective lens is at least 20 to 50 times, all the terminal portions of the image display panel having a terminal width of about 5 to 7 mm are within the visual field range of the fluorescence microscope, It is possible to detect whether a contaminant has adhered by examining from one end to the other end (opposite side) of the terminal portion of the image display panel at a time. Further, if the magnification of the objective lens is 10 to 200 times, not only the inspection as described above, but also the contaminants can be identified visually on the high magnification side of the objective lens. Furthermore, by observing the terminal portion of the image display panel in an enlarged manner, even when an inorganic physical contaminant that cannot be expected to be colored by excitation light irradiation adheres to the terminal portion, the presence of the inorganic physical contaminant is visually confirmed. Therefore, by using a fluorescent microscope, not only organic pollutants and organic pollutants that use organic pollutants as solutes, but also inorganic pollutants and electrolytic pollutants that use inorganic pollutants as solutes can be used. Can be easily detected.

  Furthermore, since organic pollutants have unique color peak wavelengths, the pollutants can be specified by using a fluorescence spectrometer in combination with a fluorescence microscope. Here, when coloring contaminants by U excitation, it is possible to detect faint coloration due to contaminants within a wide wavelength band of 400 to 750 nm. By automatically comparing and determining the coloring wavelength of the obtained contaminant, the contaminant can be identified instantly. This identification can be said to be one of the suitable means for pursuing the cause of the adhesion of the pollutant and preventing the subsequent adhesion.

  And if it is confirmed that the contaminant has adhered to the terminal part of the image display panel with a fluorescence microscope, the contaminant can be wiped off using a cotton swab coated with a cleaning agent for electronic parts.

  When the contaminant is removed from the terminal portion of the image display panel, the chip is mounted on the image display panel. Here, it is possible to further prevent disconnection and short-circuit by reconfirming whether or not contaminants are attached to the image display panel after mounting the chip.

  That is, according to the contaminant removal method of the present embodiment, the invisible or difficult-to-view contaminant that easily adheres to the terminal portion of the image display panel informs itself of its location, so that the contaminant can be easily removed. it can. Thereby, there is an effect of preventing the terminal portion of the image display panel from being disconnected or short-circuited.

  Moreover, since the fine inorganic physical contaminant that does not develop color can be visually recognized by the contaminant removal method of the present embodiment, it is possible to remove the organic contaminant that does not develop color and the inorganic contaminant that does not develop color together with the electrolytic contaminant. it can.

  In addition, this invention is not limited to embodiment mentioned above etc., A various change is possible as needed.

The graph which shows the emission spectrum obtained by irradiating excitation light with respect to the skin, saliva, sweat, human hair, and dandruff adhering to the terminal part of an image display panel in one Embodiment in the removal method of the contaminant of this invention.

Claims (2)

An irradiation step of irradiating the terminal portion of the image display panel on which the terminal is formed with excitation light;
Of the organic substance, the inorganic substance, and the pollutant composed of the organic substance or the electrolyte having the inorganic substance as a solute, the organic substance emitting fluorescence by receiving the excitation light at least in the irradiation step and the electrolyte having the organic substance as a solute And a removing step of removing from the terminal portion. The contaminant removal method according to claim 1, wherein the irradiation step and the removal step are performed using a fluorescence microscope.