WO2006022205A1 - 画像表示装置及びその製造方法 - Google Patents
画像表示装置及びその製造方法 Download PDFInfo
- Publication number
- WO2006022205A1 WO2006022205A1 PCT/JP2005/015161 JP2005015161W WO2006022205A1 WO 2006022205 A1 WO2006022205 A1 WO 2006022205A1 JP 2005015161 W JP2005015161 W JP 2005015161W WO 2006022205 A1 WO2006022205 A1 WO 2006022205A1
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- WIPO (PCT)
- Prior art keywords
- alignment mark
- substrate
- dry plate
- display device
- image display
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
- H01J9/22—Applying luminescent coatings
- H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
- H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
- H01J9/241—Manufacture or joining of vessels, leading-in conductors or bases the vessel being for a flat panel display
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
- H01J9/26—Sealing together parts of vessels
- H01J9/261—Sealing together parts of vessels the vessel being for a flat panel display
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2329/00—Electron emission display panels, e.g. field emission display panels
Definitions
- Image display device and manufacturing method thereof
- the present invention relates to a flat image display device using an electron-emitting device and a manufacturing method thereof.
- FE field emission display
- SED surface conduction electron-emission display
- R, G, B masks are prepared for each of the three color phosphors, the R mask and the substrate to be processed are aligned, exposed, and then R Replace the mask for G with the mask for G, align and expose the G mask and the substrate to be processed, replace the G mask with the mask for B, and align the mask for B and the substrate to be processed Exposure, mask replacement and mask / substrate alignment takes time, and throughput is low. Also, since the R, G, and B masks are replaced for each of the three color phosphors, the alignment must be repeated each time, which is an impediment to improving the alignment accuracy. Disclosure of the invention
- An object of the present invention is to provide a low-cost and high-quality image display device with high productivity and a method for manufacturing the same.
- An image display device includes a rear substrate on which a large number of electron-emitting devices are arranged, a phosphor pattern disposed opposite to the rear substrate, and disposed at a position corresponding to the electron-emitting devices, and An image display device including a front substrate having a light-shielding pattern, wherein marking areas are provided in at least two locations on the inner surface of the front substrate corresponding to the dry plate side alignment marks, and each marking is provided. The area is characterized by three alignment marks.
- the alignment mark preferably has a two-dimensional plane size of not less than 0.060 mm and not more than 2 mm.
- the “two-dimensional plane size” is defined as the maximum diameter of the alignment mark on the main surface of the substrate. If the two-dimensional plane size of the mark is less than 0.060 mm, it is necessary to increase the magnification of the camera. If the alignment device is expensive, the ability to identify the mark will be reduced. On the other hand, if the two-dimensional plane size of the mark exceeds 2 mm, the mark is too large and the balance with the pixel size becomes poor, and the alignment accuracy decreases.
- the marking area is preferably within a circular area having a diameter of 6 mm. If the marking area exceeds 6mm in diameter, the camera field of vision alignment mark will be easily protruded, and it will take time for alignment.
- the marking area can be circular, square, or rectangular, and the camera field of view can be circular, square, or rectangular, but if the camera field of view is square, the field size L1 X L2 should be 4 mm X 4 mm, for example. Can do.
- the alignment mark is printed on each of the marking areas provided at the four corners of the inner surface of the front substrate.
- the alignment mark is used for photolithography or printing (including seal transfer). Although it can be formed by using a shift, it is preferable to use a photolithography method because of its high positional accuracy. When the printing method is adopted, the screen printing method is most preferable.
- the step of forming the alignment mark can be performed simultaneously with the step of forming the black matrix light-shielding layer constituting the vertical dividing lines and the horizontal dividing lines for dividing the phosphor layer into a matrix.
- the alignment marks are preferably three circular marks arranged in series at a predetermined interval (see FIGS. 5A to 5D).
- the alignment mark is preferably three circular marks arranged at each vertex of a triangle having a predetermined side length (see FIGS. 6A to 6D).
- the alignment mark may be circular, square, rectangular, cross, T-shaped, double-circle, or donut-shaped, but it is a circular mark from the viewpoint of patterning with photolithography and ease of printing. Is most preferable.
- the two-dimensional plane size of the marking area is preferably 10 times or less the unit length of an RGB pixel composed of a three-color phosphor pattern. If the alignment mark size is less than 1x (equal size) of the RGB pixels, it is necessary to increase the magnification of the camera, and this will increase the cost of the alignment device. On the other hand, if the alignment mark size exceeds 10 times the RGB pixel, the mark is too large and the balance with the pixel size becomes poor, and the alignment accuracy decreases.
- a large number of pattern openings are formed when a phosphor screen is formed on a front substrate disposed opposite to a back substrate on which a large number of electron-emitting devices are arranged.
- the front substrate is aligned with the dry plate having (a) three transmissive alignment marks are formed in at least two marking areas of the dry plate, and (b) the dry plate is provided.
- a light-shielding alignment mark is formed in at least two marking areas of the ineffective portion where the phosphor pattern of the front substrate is not formed as a portion on the front substrate side corresponding to the side alignment mark on a one-to-one basis.
- the substrate side alignment mark and the dry plate side alignment mark are each a circular mark, and the diameter of the substrate side alignment mark is smaller than the diameter of the dry plate side alignment mark. Relatively align the front substrate and the dry plate so that the substrate side alignment mark is within the dry plate side alignment mark in the camera view for all marking areas.
- the diameter dl of the substrate-side alignment mark smaller than the diameter d2 of the dry-plate-side alignment mark, the substrate-side alignment mark can be easily identified, and at least two, preferably four alignment marks can be identified. It becomes possible to balance the degree of overlap to the optimum state (see Fig. 5A to Fig. 5D, Fig. 6A to Fig. 6D).
- the diameter ratio dl / d2 between the substrate side alignment mark and the dry plate side alignment mark is 0.5-0.
- the substrate side alignment mark diameter dl is set to 500 ⁇ 2 ⁇ m
- the dry plate side alignment mark diameter d2 is set to 800 ⁇ 2 m. If the diameter ratio dlZd2 is less than 0.5, the allowable displacement of the substrate-side alignment mark in the dry plate-side alignment mark will be excessive, and this will reduce the alignment accuracy. On the other hand, when the diameter ratio dlZ d2 exceeds 0.8, the substrate-side alignment mark often enters the inside of the dry plate-side alignment mark and partially protrudes to the outside. This is because it becomes difficult to balance the alignment between the marking areas (preferably 4 locations), and the alignment accuracy tends to be lowered.
- FIG. 1 is a configuration block diagram showing an apparatus used for manufacturing an image display apparatus of the present invention.
- FIG. 2 is a perspective view showing a dry plate and a front substrate when alignment is performed.
- Fig. 3A is a plan view showing a front substrate with alignment marks.
- FIG. 3B is a plan view showing another type of front substrate with alignment marks.
- Fig. 4A is a plan view showing a dry plate with alignment marks.
- FIG. 4B is a plan view showing another type of dry plate with alignment marks.
- Figure 5A shows the substrate side alignment mark and the plate side alignment mark appearing in the camera field of view.
- FIG. 5B is an enlarged plan view showing an overlapping state of the substrate side alignment mark and the dry plate side alignment mark appearing in the camera view.
- FIG. 5C is an enlarged plan view showing an overlapping state of the substrate side alignment mark and the dry plate side alignment mark appearing in the camera view.
- FIG. 5D is an enlarged plan view showing an overlapping state of the substrate side alignment mark and the dry plate side alignment mark appearing in the camera view.
- FIG. 6A is an enlarged plan view showing the overlapping state of other types of alignment marks appearing in the camera field of view.
- FIG. 6B is an enlarged plan view showing the overlapping state of other types of alignment marks appearing in the camera field of view.
- Fig. 6C is an enlarged plan view showing the overlapping state of other types of alignment marks appearing in the camera field of view.
- Fig. 6D is an enlarged plan view showing the overlapping state of other types of alignment marks appearing in the camera field of view.
- FIG. 7A is a schematic cross-sectional view showing an example of a manufacturing process of an image display device.
- FIG. 7B is a schematic cross-sectional view showing an example of the manufacturing process of the image display device.
- FIG. 7C is a schematic cross-sectional view showing an example of a manufacturing process of the image display device.
- FIG. 8 is a plan view showing a phosphor screen and a metal back layer of the front substrate by cutting out a part of the image display device (FED).
- FED image display device
- FIG. 9 is an enlarged plan view showing a part of the phosphor screen of the image display device.
- FIG. 10 is a perspective view showing an outline of an image display device (FED).
- FED image display device
- FIG. 11 is a cross-sectional view taken along the line AA in FIG.
- an alignment apparatus 30 used for manufacturing an image display apparatus of the present invention includes a substrate holder 31, a mask holder 39, a dry plate 40, a mask holder drive unit 50, a substrate holder.
- the alignment device 30 is provided in an area extending from the standby unit 32 to the alignment unit 33, and an exposure device (not shown) is provided in or near the area.
- the overall operation of the apparatus 30 and the exposure apparatus is comprehensively controlled by the controller 70.
- the controller 70 controls each operation of the drive units 50 and 60 and the exposure apparatus based on the imaging signals sent from the four CCD cameras 72, and aligns the substrate 2 to be processed and the dry plate 40. It is like that.
- the four cameras 72 are arranged corresponding to the marking areas 44 provided at the four corners of the dry plate 40, respectively.
- each camera 72 extends along the Y axis, and the cameras are arranged so as to pass through the marking areas 24 and 44 on the substrate side and the dry plate side.
- a backlight (not shown) is provided behind the substrate 2 to be processed, and illuminates the substrate 2 from the back surface (the outer surface after FED assembly) side.
- Each camera 72 is fixed at a predetermined position so as not to be displaced with respect to the drive system of the substrate 2 to be processed and the drive system of the dry plate 40.
- the dry plate 40 is fixedly disposed at a predetermined position with respect to these fixed cameras 72.
- the substrate 2 to be processed is moved from the standby unit 32 to the alignment unit 33 and is aligned with the dry plate 40 and the camera 72.
- the substrate holder 31 is provided so as to be movable between the standby unit 32 and the alignment unit 33, and includes an alignment unit that holds and moves the front substrate 2 as a substrate to be processed in a power-saving manner. And has a rectangular shape slightly larger than the rectangular substrate 2, and a plurality of vacuum suction holes (not shown) for sucking and holding the front substrate 2 are opened at appropriate positions.
- the front substrate 2 is sucked and held by the substrate holder 31 so that the long side is in the X-axis direction and the short side is in the Z-axis direction.
- the standby unit 32 is a home position for the substrate 2 to be processed and is for waiting for the substrate 2 to be processed before alignment.
- the substrate holder 31 is moved in each of the X, ⁇ , and Z directions by three linear motion drive mechanisms (not shown), and is further rotated around the Y axis by a ⁇ rotation drive mechanism (not shown). ing.
- Each operation of these drive mechanisms is performed by the controller 70 controlling the substrate holder drive unit 60 based on the alignment mark detection signal from the CCD camera 72.
- Each is controlled by
- the substrate holder drive unit 60 includes two pairs of left and right linear guides and a ball screw (not shown). Each of the linear guide and ball screw extends in the Z-axis direction, and a nut (not shown) is screwed onto the ball screw, and the substrate 2 to be processed is held on the nut together with a frame (not shown). One end of the holder to be connected is connected. The four corners of the holder are slidably supported by two pairs of left and right linear guides.
- the drive unit 60 is backed up by the controller 70 and controls the movement start timing, movement stop timing, and movement amount of the substrate holder.
- a limit switch (not shown) is provided at the end of the linear guide together with a stopper so that the movement stroke of the substrate holder by the drive unit 60 is limited.
- a mask holder 39 for sucking and holding the dry plate 40 is provided in the alignment unit 33.
- the mask holder 39 is movably supported by the drive unit 50 and is moved in the Y-axis direction while holding the dry plate 40. Since the dry plate 40 is slightly larger than the substrate 2 to be processed, the mask holder 39 is considerably larger than the substrate holder 31.
- the dry plate holder drive unit 50 includes two pairs of left and right linear guides and a ball screw (not shown). Each of the linear guide and ball screw extends in the Z-axis direction, a nut (not shown) is screwed onto the ball screw, and a mask holder that holds the dry plate 40 together with the frame (not shown) on the nut 54. One end of 39 is connected. The four corners of the holder 39 are slidably supported by two pairs of left and right linear guides.
- the drive unit 50 is backed up by the controller 70 and controls the movement start timing, movement stop timing, and movement amount of the mask holder 39, respectively.
- a limit switch (not shown) is provided at the end of the linear guide together with a stopper, and the movement stroke of the mask holder 39 by the drive unit 50 is limited.
- the substrate to be processed 2 has marking areas 24 at the four corners A, B, C, and D (ineffective portions 23), and each marking area 24 has three light-shielding alignment marks 25R.
- , 25G, 25B are arranged in series and at equal pitch intervals along the short side.
- Alignment mark 25R is used to align the red pattern among the three-color phosphors.
- Alignment Tomark 25G is used to align the green pattern among the three-color phosphors.
- Alignment mark 25B is used to align the blue pattern among the three-color phosphors.
- the upper force is also arranged in the order of the lower alignment marks 25R, 25G, and 25B. The present invention is not limited to this arrangement.
- each marking area 24 ⁇ has three light-shielding alignment marks 25R, 25G, 25 ⁇ arranged at the vertices of an isosceles triangle or equilateral triangle. Yes. As shown in FIG. 6, the three marks 25R, 25G, 25 ⁇ are arranged at equal pitch intervals P1. In the example shown in the figure, the force for arranging the alignment mark 25G at the apex of the triangle is not limited to this arrangement. Alignment mark 25R or alignment mark 25 ⁇ may be placed at the apex of the triangle.
- Photoresist is applied to the effective portions 21 of the substrates 2 and 2 to be processed, aligned with dry plates 40 and 40 to be described later, and three-color phosphor patterns are sequentially exposed by an exposure apparatus.
- the dry plate 40 includes a large number of pattern holes 42 regularly arranged in a central pattern region (effective portion) 41. These pattern holes 42 serve as openings for allowing light to pass to the processing substrate side during exposure. Further, the dry plate 40 has marking areas 44 at the four corners A, ⁇ , C, and D of the non-pattern area (ineffective portion) 43 on the periphery, and each of the marking areas 44 has three transmission alignment marks 45R, 45G and 45mm are arranged at an equal pitch interval (pitch interval P1) in an oblique arrangement.
- the alignment mark 45R is used to align the red pattern of the three-color phosphor.
- the alignment mark 45G is used to align the green pattern among the three-color phosphors.
- the alignment mark 4 5 ⁇ is used to align the blue pattern among the three-color phosphors.
- the forces are arranged in the order from top to bottom alignment marks 25R, 25G, 25mm.
- the present invention is not limited to this arrangement. From top to bottom, mark 25G, 25 ⁇ , 25R, or mark 25G, 25R, 25 ⁇ jl, yes! / ⁇ ⁇ 3 ⁇ 4mark 25 ⁇ , 25R, 25G jl, yes! / ⁇ ⁇ 3 ⁇ 4mark 25 ⁇ , 25G, 25R
- the marks may be arranged in the order of marks 25R, 25 ⁇ , and 25G. [0030]
- each marking area 44A includes two transmissive alignment marks 45G and 45R (also used as 45B) arranged in series along the short side.
- the upper mark 45G is used for alignment of the green pattern among the three-color phosphors.
- the lower mark 45R (45B) is used for both red pattern alignment and blue pattern alignment among the three-color phosphors.
- Figures 5A, 5B, 5C, and 5D show the camera fields of the four corners A, B, C, and D when aligning the green pattern.
- the marking area 44 of the dry plate 40 is covered with a light shielding film such as a black matrix, except for the alignment marks 45R, 45G, and 45B. Therefore, only the green pattern substrate alignment mark 25G is visible in the camera's field of view, and the red and blue pattern substrate alignment marks 25R and 25B are hidden in the shaded area indicated by the diagonal lines in the figure. Talk!
- the substrate-side alignment mark 25G for the green pattern is included in each of the transmission-type alignment marks 45G on the dry plate side within the camera field of the four corners A, B, C, D. Respectively.
- the controller 70 imbalances the overlapping state of the substrate side alignment mark 25G and the dry plate side alignment mark 45G for the four corners A, B, C, D based on the input signal. As shown in the figure, slightly move the substrate holder drive unit 31 and finely align the substrate to be processed 2 with respect to the dry plate 40. Both alignment marks 25G, 45G at the four corners A, B, C, D Balance the overlapping state.
- the RGB pixel size subjected to pattern exposure is 600 ⁇ m
- the width of the strip-shaped phosphor layers is 150 m
- the space between the strip-shaped phosphor layers is 50 m
- diameter of substrate side alignment mark 25R, 25G, 25B dl is 500 / ⁇ ⁇
- diameter of plate side alignment mark 45R, 45G, 45 ⁇ diameter d2 is 800 m
- pitch PI 200 / zm when the RGB pixel size subjected to pattern exposure is 600 ⁇ m
- the width of the strip-shaped phosphor layers is 150 m
- the space between the strip-shaped phosphor layers is 50 m
- diameter of substrate side alignment mark 25R, 25G, 25B dl is 500 / ⁇ ⁇
- diameter of plate side alignment mark 45R, 45G, 45 ⁇ diameter d2 is 800 m
- the entire blue pattern alignment mark 25B enters the dry plate side alignment mark 45B and enters the blue pattern. Are aligned and can be imaged. Also, if the substrate to be processed 2 is moved to the right in the figure by the pitch interval P1, the entire red pattern alignment mark 25R will enter the dry plate side alignment mark 45R and align with the red pattern. And imaging becomes possible.
- Figures 6A, 6B, 6C, and 6D show the camera fields of the four corners A, B, C, and D, respectively, when aligning the red pattern.
- the marking area 44A of the dry plate 40A is covered with a light shielding film such as a black matrix except for the alignment marks 45R, 45G, and 45B.
- a light shielding film such as a black matrix except for the alignment marks 45R, 45G, and 45B.
- the substrate pattern alignment mark 25R for the red pattern can be seen in the camera field of view, and the substrate pattern alignment mark 25G for the green pattern is hidden behind the shaded portion indicated by the oblique lines in the figure.
- the substrate side alignment mark 25B for the blue pattern is out of the field of view of the camera.
- the substrate-side alignment mark 25R for the red pattern is included in each of the transmission-type alignment marks 45R on the dry plate side within the camera field of the four corners A, B, C, D. Respectively.
- the controller 70 imbalances the overlapping state of the board-side alignment mark 25R and the plate-side alignment mark 45R for the four corners A, B, C, and D based on the input signals. As shown in the figure, slightly move the substrate holder drive unit 31 and finely align the substrate 2A to be processed with respect to the dry plate 40A. Both alignment marks 25R, 45R at the four corners A, B, C, D Balance the overlapping state of.
- the width of the strip-shaped phosphor layers is 150 m
- the space between the strip-shaped phosphor layers is 50 m
- the camera 4mmX 4mm the substrate side alignment mark 25R, 25G, 25B diameter dl 100 / ⁇ ⁇
- dry plate side alignment mark 45R, 45G, 45 ⁇ diameter d2 400 m pitch interval PI 200 m.
- the entire alignment mark 25G for the green pattern enters the upper dry plate side alignment mark 45G.
- the green pattern is aligned and can be imaged.
- the entire blue pattern alignment mark 25B is placed in the lower dry plate side alignment mark 45B (also used as the red mark). It enters and is aligned for the blue pattern and can be imaged.
- a glass substrate 2 serving as a front substrate of the FED is cleaned using a predetermined chemical solution to obtain a desired clean surface.
- a light shielding layer forming solution containing a light absorbing material such as a black pigment is applied to the inner surface of the cleaned front substrate 2. After the coating film is heated and dried, it is exposed using a screen mask having apertures at positions corresponding to the matrix pattern, and developed, and as shown in FIG. 7A, the matrix pattern light-shielding layers 5b 1, 5b2 Form.
- the substrate 2 to be processed is transferred to the substrate holder 31 by a transfer robot (not shown) and is sucked and held. Since the receiving surface of the substrate holder 31 has a self-alignment structure, the substrate 2 to be processed is automatically roughly aligned with respect to the substrate holder 31.
- the substrate 2 to be processed is a front substrate for FED, and is coated with a photoresist on the surface on which the pattern is to be formed as described above.
- the substrate to be processed 2 is vacuum-sucked and held by the vacuum chuck of the substrate holder 31 so that the resist coating surface is on the exposure apparatus side.
- the substrate 2 to be processed is moved from the standby unit 32 to the alignment unit 33, the alignment mark is imaged by the four cameras 72, and the imaging signal is sent to the controller 70.
- the controller 70 finely aligns the substrate 2 to be processed with respect to the dry plate 40 based on the imaging signal, and thereby aligns both the substrate 2 to be processed and the dry plate 40.
- a mixed solution prepared by mixing red (R) phosphor particles at a predetermined ratio with respect to the photoresist solution (including a solvent) is applied on the front substrate 2 to a predetermined film thickness.
- the coating film is heated and dried, it is exposed and developed using a screen mask having openings at positions corresponding to the red (R) pattern.
- G green
- B blue
- a predetermined pattern is formed using the same photolithography method.
- the substrate 2 is baked to burn off the photoresist, and as shown in FIGS.
- the phosphor screen 6 in which the light body layer 6a is regularly arranged vertically and horizontally is obtained.
- the width in the X direction of the vertical partition line 13V of the phosphor layer 6a is, for example, in the range of 20 to 50 / zm.
- the width of the vertical dividing line 13V is defined by the bottom interval between the adjacent phosphor layers 6a regardless of the sectional shape (rectangular, trapezoidal, inverted trapezoid) of the phosphor layer.
- the width in the Y direction of the horizontal dividing line 13H (stripes) of the phosphor layer 6a is, for example, in the range of 50 to 250 / ⁇ ⁇ .
- These vertical and horizontal dividing lines 13V and 13H have a matrix pattern light-shielding layer 5b, and are shielded so that light does not leak to the front substrate 2.
- the metal back layer 7 is formed on the upper surface of the phosphor layer 6a of the R, G, B segment pattern.
- an aluminum (A1) film is formed on the thin film made of organic resin such as -trocellulose formed by spin coating, for example, by vacuum deposition. Furthermore, it is possible to take a method of baking this to remove organic substances.
- the phosphor screen 6 thus formed is placed in a vacuum envelope together with the electron-emitting device.
- a method is employed in which a front substrate 2 having a phosphor screen 6 and a rear substrate 1 having a plurality of electron-emitting devices 8 are vacuum-sealed with frit glass or the like to form a vacuum container. Further, a predetermined getter material is deposited in the vacuum envelope to form a getter material vapor deposition film in the region of the metal back layer 7.
- FIG. 10 and FIG. 11 show the structure of the FED common to the present embodiment.
- the FED has a front substrate 2 and a rear substrate 1 each made of rectangular glass, and the substrates 1 and 2 are arranged to face each other with an interval of 1 to 2 mm.
- a phosphor screen 6 is formed on the inner surface of the front substrate 2.
- the phosphor screen 6 includes a phosphor layer 6a that emits light of three colors of red (R), green (G), and blue (B) and a matrix-shaped light shielding layer 5b.
- a metal back layer 7 is formed which functions as an anode electrode and functions as a light reflecting film that reflects the light of the phosphor layer 6a.
- a predetermined anode voltage is applied to the metal back layer 7 by a circuit (not shown).
- a plurality of electrons that emit an electron beam for exciting the phosphor layer 7 are emitted.
- a number of electron-emitting devices 8 are provided. These electron-emitting devices 8 are arranged in a plurality of columns and a plurality of rows corresponding to each pixel. The electron-emitting device 8 is driven by wiring (not shown) arranged in a matrix.
- a large number of spacers 10 in the form of plates or columns are provided between the rear substrate 1 and the front substrate 2 as reinforcement in order to withstand the atmospheric pressure acting on these substrates 1 and 2.
- An anode voltage is applied to the phosphor screen 6 via the metal back layer 7, and the electron beam emitted from the electron emitter 8 is accelerated by the anode voltage and collides with the phosphor screen 6. As a result, the corresponding phosphor layer 6a emits light and an image is displayed.
- FIGS. 8 and 9 show the structure of the front substrate 2, particularly the phosphor screen 6, common to the embodiments of the present invention.
- the phosphor screen 6 has a number of rectangular phosphor layers that emit red (R), green (G), and blue (B).
- R red
- G green
- B blue
- the phosphor layers R, G, B are repeatedly arranged at a predetermined gap interval in the X axis direction.
- the gap between the phosphor layers 6a in the XY plane is allowed in the XY plane because the gap gap is allowed to vary within the range of manufacturing errors or within the range of design tolerances.
- the interval is not exactly constant, but here it is assumed that it is almost constant for convenience.
- the phosphor screen 6 includes light shielding layers 5a and 5b. As shown in FIG. 8, this light shielding layer is formed between the rectangular frame light shielding layer 5a extending along the peripheral edge of the front substrate 2 and the phosphor layers R, G, B inside the rectangular frame light shielding layer 5a. And a matrix pattern light shielding layer 5b extending in a matrix.
- a three-color phosphor R, G, B common mask (dry plate) and a front substrate with alignment marks are prepared, and after the common mask and the front substrate are first aligned, the mask is prepared. Since the R, G, and B3 color patterns can be exposed to the substrate one after another without changing, the throughput is greatly improved.
- the present invention it becomes unnecessary to replace the masks for R, G, and B for each pattern exposure of the three-color phosphor, and the alignment between the mask Z substrate is not re-executed.
- the positional deviation of the three-color phosphor pattern can be suppressed to within 5 m, and the alignment accuracy can be dramatically improved.
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP05772596A EP1783807A1 (en) | 2004-08-25 | 2005-08-19 | Image display device and manufacturing method thereof |
US11/671,285 US20070126334A1 (en) | 2004-08-25 | 2007-02-05 | Image display unit, and method of manufacturing the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004245297 | 2004-08-25 | ||
JP2004-245297 | 2004-08-25 |
Related Child Applications (1)
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US11/671,285 Continuation US20070126334A1 (en) | 2004-08-25 | 2007-02-05 | Image display unit, and method of manufacturing the same |
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WO2006022205A1 true WO2006022205A1 (ja) | 2006-03-02 |
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PCT/JP2005/015161 WO2006022205A1 (ja) | 2004-08-25 | 2005-08-19 | 画像表示装置及びその製造方法 |
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US (1) | US20070126334A1 (ja) |
EP (1) | EP1783807A1 (ja) |
KR (1) | KR20070036188A (ja) |
CN (1) | CN101002293A (ja) |
TW (1) | TWI282248B (ja) |
WO (1) | WO2006022205A1 (ja) |
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KR101026935B1 (ko) * | 2003-12-10 | 2011-04-04 | 엘지디스플레이 주식회사 | 디스펜서 정렬장치 및 그 방법 |
US20060024140A1 (en) * | 2004-07-30 | 2006-02-02 | Wolff Edward C | Removable tap chasers and tap systems including the same |
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- 2005-08-19 CN CNA2005800274462A patent/CN101002293A/zh active Pending
- 2005-08-19 KR KR1020077004114A patent/KR20070036188A/ko not_active Application Discontinuation
- 2005-08-19 WO PCT/JP2005/015161 patent/WO2006022205A1/ja not_active Application Discontinuation
- 2005-08-19 EP EP05772596A patent/EP1783807A1/en not_active Withdrawn
- 2005-08-24 TW TW094128985A patent/TWI282248B/zh not_active IP Right Cessation
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Also Published As
Publication number | Publication date |
---|---|
CN101002293A (zh) | 2007-07-18 |
KR20070036188A (ko) | 2007-04-02 |
EP1783807A1 (en) | 2007-05-09 |
TW200612774A (en) | 2006-04-16 |
US20070126334A1 (en) | 2007-06-07 |
TWI282248B (en) | 2007-06-01 |
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