JP2007249235A - Liquid crystal display element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent generation of corrosion resulting from adhesion of moisture common output wiring is maintained even at low resistance and its width is narrowed down. <P>SOLUTION: The common output wiring 30 is provided on the upper surface of a segment substrate 11. In this case, a part inside a seal member 13 of the common output wiring 30 has two-layer structure in which a transparent metal oxide layer 30b is provided on a low resistance metal layer 30a comprised of Cr, etc. and parts other than that have one-layer structure of the transparent metal oxide layer. As a result, the width is comparatively narrowed down with keeping a resistance value of the part inside the seal member 13 as it is small and consequently, a leading area is reduced. In addition, a part outside the seal member 13 of the common output wiring 30 is prevented from being corroded even if moisture is adhered. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquid crystal display element.

  FIG. 11 shows a partial cross-sectional view of an example of a conventional liquid crystal display element. This liquid crystal display element is of a simple matrix type, and a segment substrate 1 and a common substrate 2 disposed on the segment substrate 1 are bonded together via a substantially rectangular frame-shaped sealing material 3, and the sealing material 3 and both substrates are bonded. The liquid crystal 4 is sealed in a space surrounded by 1 and 2.

  On the upper surface of the segment substrate 1 (the surface facing the common substrate 2), a plurality of segment electrodes 5 made of ITO are provided on the inner side of the sealing material 3 so as to extend in a direction perpendicular to the paper surface in FIG. On the lower surface of the common substrate 2 (the surface facing the segment substrate 1), a plurality of common electrodes 6 made of ITO are provided extending in the left-right direction in FIG. The segment electrode 5 and the common electrode 6 are disposed so as to be orthogonal to each other, and a pixel portion is formed by an opposing region of the intersection.

  One side of the segment substrate 1 protrudes from the common substrate 2. A plurality of common wires 7 and a plurality of segment wires (not shown) made of ITO are provided on the upper surface of the protruding portion 1a. One end of the segment wiring is connected to the corresponding segment electrode 5.

  One end of the common wiring 7 is connected to the segment substrate side common terminal 8 made of ITO provided in the arrangement region of the sealing material 8 on the upper surface of the segment substrate 1. A common substrate side common terminal 9 made of ITO is provided in a portion corresponding to the segment substrate side common terminal 8 on the lower surface of the common substrate 2. The common substrate side common terminal 9 is connected to one end of the corresponding common electrode 6.

  The segment substrate side common terminal 8 and the common substrate side common terminal 9 that correspond to each other pass through the conductive material 10 made of conductive particles mixed in the seal material 3 in the region where the seal material 3 and the segment substrate side common terminal 9 overlap. Are electrically connected.

  By the way, in the conventional liquid crystal display element, in particular, the segment electrode 5, the segment wiring, the common wiring 7 and the segment substrate side common terminal 8 provided on the upper surface of the segment substrate 1 are formed of ITO. In this case, since ITO is a transparent metal having a relatively high resistance, in particular, the width of the common wiring 7 cannot be reduced in order to maintain the common wiring 7 at a low resistance.

  On the other hand, recently, a liquid crystal display element used particularly in a mobile phone is required to be small and have a relatively large display capacity. However, the above-mentioned conventional liquid crystal display element has a limit in miniaturization, in particular, since the routing area of the relatively wide common wiring 7 becomes large.

  Therefore, a liquid crystal display element in which the common wiring 7 is maintained at a low resistance and the width thereof is narrowed has been developed. FIG. 12 shows a partial cross-sectional view of an example of such a conventional liquid crystal display element. This liquid crystal display element is of a reflective type, and segment electrodes 5, common wires 7, segment substrate side common electrodes 8 and segment wires (not shown) provided on the upper surface of the segment substrate 1 are made of ITO layers 5a, 7a, 8a and ITO. Also, it has a two-layer structure of low resistance Cr layers 5b, 7b, and 8b.

However, in the liquid crystal display device shown in FIG. 12, the common wiring 7 is exposed outside the sealing material 3, and therefore, when moisture is attached to the exposed common wiring 7, There was a problem that the Cr layer 7b of the steel sometimes corroded. Since the ITO layer does not corrode even when moisture is attached, the common wiring 7 does not corrode in the liquid crystal display element shown in FIG. However, the liquid crystal display element shown in FIG. 11 has a problem in that there is a limit to downsizing since the routing area of the relatively wide common wiring 7 becomes large as described above.
An object of the present invention is to prevent corrosion caused by adhesion of moisture even if the wiring is maintained at a low resistance and its width is narrowed.

In the first aspect of the present invention, the first substrate and the second substrate are sealed with a sealing material, a display region is formed in an inner region of the sealing material, and a plurality of first electrodes are formed in the display region. A plurality of second electrodes orthogonal to the first electrode, a first terminal and a second terminal disposed in an outer region of the sealing material, and the second electrode disposed in an outer region of the display region. In the liquid crystal display element in which the first wiring connecting the first electrode and the first terminal and the second wiring connecting the second electrode and the second terminal are disposed, The first wiring in the outer region from the outer wall surface and the second wiring in the outer region from the outer wall surface of the sealing material are formed of a transparent metal oxide, and at least the second wiring is an inner wall surface of the sealing material. Between the outer side of the display area and the display area, and formed of a metal having a lower resistance than the transparent metal oxide. And it is characterized in and.
According to a second aspect of the present invention, in the first aspect, the first terminal, the first wiring, the first electrode and the second terminal, and the second wiring are the first Formed on one substrate, the second electrode is formed on the second substrate, and the second electrode and the second wiring are connected via a conductive material. It is.
According to a third aspect of the present invention, in the first aspect of the invention, the first substrate has a protruding portion protruding from one side of the second substrate, and the first terminal and the second terminal The terminal is formed in a semiconductor chip mounting region formed in the projecting portion.
According to a fourth aspect of the present invention, in the third aspect of the present invention, the second wiring is routed to a pair of opposite side surfaces of the display area. .
According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the second wiring is routed to a side surface opposite to the display area every other one of the second terminal arrays. It is characterized by being.
According to a sixth aspect of the invention, in the first aspect of the invention, the second wiring has a resistance lower than that of the transparent metal oxide at least between the outside of the inner wall surface of the sealing material and the display region. It has a two-layer structure of a metal layer and a transparent metal oxide layer.
The invention according to claim 7 is the invention according to claim 6, wherein the transparent metal oxide layer is formed on a metal layer having a resistance lower than that of the transparent metal oxide.
The invention according to claim 8 is the invention according to claim 7, wherein the first electrode has the transparent metal oxide layer formed on a metal layer having a lower resistance than the transparent metal oxide. It is a feature.
According to the present invention, at least the second wiring is formed of a metal having a resistance lower than that of the transparent metal oxide between the outside of the inner wall surface of the sealing material and the display region. A portion can be maintained at a low resistance and its width can be narrowed. Moreover, the first wiring outside the outer wall surface of the sealing material and the second wiring outside the outer wall surface of the sealing material are transparently oxidized. Since it is made of metal, corrosion due to moisture adhesion can be prevented.

  As described above, according to the present invention, at least the second wiring is formed of a metal having a resistance lower than that of the transparent metal oxide between the outside of the inner wall surface of the sealing material and the display region. At least a part of the wiring of the second wiring can be maintained at a low resistance and the width thereof can be narrowed. As a result, the routing area of the second wiring can be reduced, and the first area outside the outer wall surface of the sealing material can be reduced. Since the second wiring in the region outside the outer wall surface of the wiring and the sealing material is made of transparent metal oxide, it is possible to prevent corrosion caused by the adhesion of moisture.

  FIG. 1 is a plan view showing the main part of a liquid crystal display device as a first embodiment of the present invention. This liquid crystal display element is of a simple matrix type, and a segment substrate 11 and a common substrate 12 disposed on the segment substrate 11 are bonded together via a substantially rectangular frame-shaped sealing material 13, and the sealing material 13 and both substrates are bonded. The liquid crystal 14 (see FIG. 5) is sealed in a space surrounded by 11 and 12.

  In the rectangular display region 15 surrounded by the alternate long and short dash line on the upper surface of the segment substrate 11 (the surface facing the common substrate 12), only one segment display 16 is shown in FIG. It is provided to extend. Although only one is shown in FIG. 1 on the lower surface of the common substrate 12 (the surface facing the segment substrate 11), a plurality of common electrodes 17 are provided extending in the row direction. The segment electrode 16 and the common electrode 17 are arranged so as to be orthogonal to each other, and a pixel portion is formed by an opposing region of the intersection.

  One side of the segment substrate 11 (the lower side in FIG. 1) protrudes from the common substrate 12. A rectangular semiconductor chip mounting region 18 is provided at the center of the upper surface of the protruding portion 11a. On the semiconductor chip mounting area 18, a rectangular semiconductor chip 19 made of a liquid crystal driving LSI or the like is mounted via an anisotropic conductive adhesive (not shown).

  2 is a partial plan view of the liquid crystal display element shown in FIG. 1, FIG. 3 is a partial plan view of the segment substrate 11, and FIG. FIG. In this case, the semiconductor chip 19 is omitted in FIGS.

  In FIG. 3, a plurality of segment output terminals 21 are provided on the upper side of the semiconductor chip mounting area 18, a plurality of common output terminals 22 are provided on the left side of the lower side, and a plurality of output terminals 22 are provided on the right side of the lower side. Input terminal 23 is provided. The lower end portion of the segment electrode 16 provided in the display area 15 is connected to the segment output terminal 21 via the segment output wiring 24 provided below the display area 15 on the upper surface of the segment substrate 11. .

  In FIG. 3, a plurality of external connection terminals 25 are provided at substantially the center of the upper surface of the lower end of the segment substrate 11. The external connection terminal 25 and the input terminal 23 are connected via an input wiring 26 provided on the segment substrate 11 between them.

  In FIG. 3, a plurality of segment substrate side common terminals 27 and 28 are provided on the left outer side and the right outer side of the display area 15 on the upper surface of the segment substrate 11, respectively. The segment substrate side common terminals 27 and 28 are arranged over substantially the entire vertical direction of the display area 15 shown in FIG.

  In this case, as shown in FIG. 3, the outer end surfaces of the segment substrate side common terminals 27 and 28 are disposed at the same distance from the left end surface or the right end surface of the segment substrate 11 in the vicinity thereof, and the inner end surfaces are It is arranged at a position gradually approaching the display area 15 side from the lower side toward the upper side. In other words, the segment substrate side common terminals 27 and 28 are arranged such that their outer end surfaces are aligned at the same distance from the side end of the segment substrate 11, and the lengths of the segment substrate common terminals 27 and 28 are gradually increased toward the upper side. Is formed.

  In FIG. 3, every other common output terminal 22 among the plurality of common output terminals 22 is below the left side of the lower side of the semiconductor chip mounting region 18 on the upper surface of the segment substrate 11 and on the segment substrate 11. A common output wiring 29 provided on the left side of the upper surface is connected to the inner end of the left segment board side common terminal 27.

  In FIG. 3, every other common output terminal 22 among the plurality of common output terminals 22 is arranged in the center in the width direction in the semiconductor chip mounting region 18 on the upper surface of the segment substrate 11 and the upper surface of the segment substrate 11. Is connected to the inner end of the segment board side common terminal 28 on the right side via a common output wiring 30 provided on the right side of the.

  In this case, as described above, the segment substrate side common terminals 27 and 28 are arranged over almost the entire vertical direction of the display area 15 shown in FIG. 1, and the common output wirings 29 and 30 are arranged in the display area 15. Are connected to the segment board side common terminals 27 and 28 in order from the furthest away from the terminal, and the one closest to the display area 15 is connected to the uppermost segment board side common terminals 27 and 28. The display area 15 is arranged so as to extend over the entire length in the vertical direction.

  In FIG. 4, a plurality of common substrate side common terminals 31 and 32 are provided on the lower left side and the right outer side of the display area 15 on the lower surface of the common substrate 12. The common substrate side common terminals 31 and 32 are arranged over substantially the entire vertical direction of the display region 15 shown in FIG.

  In this case, as shown in FIG. 4, the outer end surfaces of the common substrate side common terminals 31 and 32 are arranged at the same distance from the left end surface or the right end surface of the common substrate 12 in the vicinity thereof, and the inner end surface is the vicinity thereof. Are arranged at the same distance from the left or right side of the display area 15. In other words, the common substrate side common terminals 31 and 32 are arranged at equal intervals with the same length.

  As shown in FIG. 4, the left end portion of every other common electrode 17 among the plurality of common electrodes 17 provided in the display region 15 is connected to the common substrate side common terminal 31 on the left side. Yes. The right end portion of the other common electrode 17 of every other common electrode 17 is connected to the common substrate side common terminal 32 on the right side.

  The common board side common terminals 31 and 32 and the segment board side common terminals 27 and 28 corresponding to each other are mixed in the sealing material 13 in a region where they overlap with the sealing material 13 as shown in FIG. Conductive connection is made through a conductive material 33 (see FIG. 5) made of conductive particles.

  As a result, the plurality of common output terminals 22 provided in the semiconductor chip mounting region 18 include common output wirings 29 and 30, segment substrate side common terminals 27 and 28, a conductive material 33 and a common substrate side common terminal 31, 32 is connected to the common electrode 17.

  In this case, as described above, the plurality of segment output terminals 21 provided in the semiconductor chip mounting region 18 are connected to the segment electrode 16 via the segment output wiring 24. Therefore, one semiconductor chip 19 mounted on the semiconductor chip mounting region 18 has a built-in segment electrode for supplying voltages to the plurality of segment electrodes 16 and the plurality of common electrodes 17 and a drive circuit for driving the common electrodes. Is.

  Here, as shown in FIG. 2, the outer wall surface of the right side portion of the sealing material 13 is disposed at a substantially central portion between the right end surfaces of the substrates 11 and 12 and the outer end surfaces of the common terminals 28 and 32. . The inner wall surface of the right side of the sealing material 13 is disposed slightly outside the inner end surface of the lowermost segment substrate side common terminal 28 in FIG. In other words, the common terminals 28 and 32 are disposed between the outer wall surface of the sealing material 32 and the display area 15. The arrangement of the sealing material 13 is the same for the left side portion of FIG.

  Next, the structure and materials of both the electrodes 16 and 17 will be described with reference to a cross-sectional view of the portion along the line AA in FIG. Of the common output wiring 30 (same as the common output wiring indicated by reference numeral 29 in FIG. 3), the single-layer structure of only the transparent metal oxide layer 30b such as ITO in the width of the sealing material 13 and the region outside the outer wall surface. In a region inside the inner wall surface of the sealing material 13, a two-layer structure is provided in which a transparent metal oxide layer 30b is provided on a low-resistance metal layer 30a described later. The low resistance metal layer 30a is made of a metal having a lower resistance than the transparent metal oxide layer such as Cr, Ta, Ti, Mo, Al, Ag, and alloys thereof (hereinafter the same).

  Both electrodes 16 and 17 have a single layer structure of a transparent metal oxide layer such as ITO. The common substrate side common terminals 31 and 32 have a single layer structure of a transparent metal oxide layer such as ITO. Further, as shown in FIG. 2, the segment substrate-side common terminals 27 and 28 have different lengths, and the portion within the width of the sealing material 28 has a single layer structure of a transparent metal oxide layer. The portion in the inner region from the inner wall surface of the material 28 has a two-layer structure in which the transparent metal oxide layer 30b is provided on the low resistance metal layer 30a.

  Although not shown, the segment output terminal 21, the common output terminal 22, the input terminal 23, the segment output wiring 24, the external connection terminal 25 and the input wiring 26 are transparently oxidized. It has a single layer structure of metal layers.

  Thus, in this liquid crystal display element, in particular, a portion of the common output wiring 30 (the same as the common output wiring indicated by reference numeral 29 in FIG. 3) in the region inside the inner wall surface of the sealing material 13 is provided with a low resistance. Since the metal layer 30a and the transparent metal oxide layer 30b have a two-layer structure, a required low resistance value can be ensured even if the width of the common output wirings 29 and 30 in this portion is relatively narrow.

  In this case, as described above, since the common output wirings 29 and 30 are particularly extended closer to the display area 15 toward the upper side, the effect of lowering the resistance value is large. Since the width can be reduced, in FIGS. 1 to 3, the width of the routing area of the common output wirings 29 and 30 on the left outer side and the right outer side of the display area 15 can be reduced. Can be narrowed.

  Further, in this liquid crystal display element, a single layer structure of a transparent metal oxide layer that does not corrode all the wirings including the common output wirings 29 and 30 in the arrangement region of the sealing material 13 and outside thereof is provided. It is possible to prevent corrosion even if moisture adheres to the surface.

  Next, FIG. 6 shows a sectional view similar to FIG. 5 of a liquid crystal display element as a second embodiment of the present invention. In this liquid crystal display element, a portion of the common output wiring 30 (the same as the common output wiring indicated by reference numeral 29 in FIG. 3) in the region inside the inner wall surface of the sealing material 13 is one layer of the low-resistance metal layer 30a. It has a structure, and the other part has a single layer structure of a transparent metal oxide layer.

  Both electrodes 16 and 17 have a single layer structure of a transparent metal oxide layer. The common substrate side common terminals 31 and 32 have a single layer structure of a transparent metal oxide layer such as ITO. Further, the segment substrate side common terminals 27 and 28 have a single layer structure of a transparent metal oxide layer in a portion within the width of the sealing material 28, and a portion of the inner region from the inner wall surface of the sealing material 28 has a low resistance metal layer. 1 layer structure. Although not shown, the segment output terminal 21, the common output terminal 22, the input terminal 23, the segment output wiring 24, the external connection terminal 25 and the input wiring 26 are transparently oxidized. It has a single layer structure of metal layers.

  Thus, in this liquid crystal display element, in particular, the portion within the width of the sealing material 13 in the common output wiring 30 (the same as the common output wiring indicated by reference numeral 29 in FIG. 3) is the low-resistance metal layer 30a. Therefore, even if the width of the common output wiring 30 is relatively narrow, a necessary low resistance value can be ensured. As a result, in FIGS. 1 to 3, the width of the routing area of the common output wirings 29 and 30 on the left outer side and the right outer side of the display area 15 can be reduced, and thus the width of the frame can be reduced.

  Further, this liquid crystal display element has a single layer structure of a transparent metal oxide layer that does not corrode all the wirings including the common output wirings 29 and 30 within the width of the sealing material 13 and outside the outer wall surface. These wirings can be prevented from corroding even if moisture adheres to them.

  Further, in this liquid crystal display element, a portion within the width of the sealing material 13 in the common output wiring 30 (the same as the common output wiring indicated by reference numeral 29 in FIG. 3) is a one-layer structure of the low-resistance metal layer 30a. Therefore, compared with the case of the two-layer structure shown in FIG. 5, the step in this portion is relaxed, and the gap can be made uniform.

  5 and 6, when the low-resistance metal layer 30a is a material that is easily corroded when formed within the width of the sealing material 15, the positions of the inner wall surface and the outer wall surface of the sealing material 15 vary considerably. The end surface of the low-resistance metal layer 30a may be positioned in the inner region from the inner wall surface of the sealing material 15 and in the inner region from the outer wall surface by the distance allowing the variation. In any case, on the outside of the sealing material 13, all the wirings including the common output wirings 29 and 30 have a single layer structure of a transparent metal oxide layer so that even if moisture adheres to these wirings, they do not corrode. Can be.

  Next, FIG. 7 shows a sectional view similar to FIG. 5 of a liquid crystal display device as a third embodiment of the present invention. In this liquid crystal display element, a portion of the common output wiring 30 (the same as the common output wiring indicated by reference numeral 29 in FIG. 3) in the region outside the inner wall surface of the sealing material 13 is low on the transparent metal oxide layer 30b. It has a two-layer structure in which the resistance metal layer 30a is provided, and the other part has a one-layer structure of a transparent metal oxide layer.

  Further, as shown in FIG. 2, the segment substrate-side common terminals 27 and 28 have different lengths, and the portion within the width of the sealing material 28 has a single layer structure of a transparent metal oxide layer. The portion in the inner region from the inner wall surface of the material 28 has a two-layer structure in which the low-resistance metal layer 28a is provided on the transparent metal oxide layer 28b. Both electrodes 16 and 17 have a single layer structure of a transparent metal oxide layer. Although not shown, the segment output terminal 21, the common output terminal 22, the input terminal 23, the segment output wiring 24, the external connection terminal 25 and the input wiring 26 are transparently oxidized. It has a single layer structure of metal layers.

  Thus, in this liquid crystal display element, in particular, a portion of the common output wiring 30 (the same as the common output wiring indicated by reference numeral 29 in FIG. 3) in the region inside the inner wall surface of the sealing material 13 is transparently oxidized. Since the metal layer 30b and the low resistance metal layer 30a have a two-layer structure, a necessary low resistance value can be ensured even if the common output wiring 30 is relatively narrow. As a result, in FIGS. 1 to 3, the width of the routing area of the common output wirings 29 and 30 on the left outer side and the right outer side of the display area 15 can be reduced, and thus the width of the frame can be reduced.

  Further, in this liquid crystal display element, the common output wirings 29 and 30 have a single layer structure of a transparent metal oxide layer within the width of the sealing material 13 and outside the outer wall surface, so that moisture adheres to these wirings. Even if it does not corrode.

  Furthermore, in this liquid crystal display element, for example, a portion of the common output wiring 30 in a region inside the inner wall surface of the sealing material 13 is provided with a low-resistance metal layer 30a on the transparent metal oxide layer 30b. Therefore, the transparent metal oxide layer and the low resistance metal layer can be successively formed in this order, and the formed low resistance metal layer and the transparent metal oxide layer can be patterned in this order.

  In contrast, in the case of the first embodiment shown in FIG. 5, a transparent metal oxide layer is formed, then the formed transparent metal oxide layer is patterned, and then a low resistance metal layer is formed. Next, the formed low resistance metal layer is patterned. Therefore, in the case of this embodiment, compared with the first embodiment shown in FIG. 5, the transparent metal oxide layer and the low resistance metal layer can be continuously formed in this order, so that the productivity can be improved. Improvements can be made.

  Next, FIG. 8 shows a sectional view similar to FIG. 5 of a liquid crystal display element as a fourth embodiment of the present invention. This liquid crystal display element is of a reflective type, and a portion of the common output wiring 30 (the same as the common output wiring indicated by reference numeral 29 in FIG. 3) in the region inside the inner wall surface of the sealing material 13 is a low resistance metal. The layer 30a has a single-layer structure, and the other portions have a single-layer structure of a transparent metal oxide layer.

  The segment substrate side common terminal 28 (same as the segment substrate side common terminal denoted by reference numeral 27 in FIG. 3) has a single layer structure of a low resistance metal layer. The common substrate side common terminal 32 (the same as the common substrate side common terminal indicated by reference numeral 31 in FIG. 4) has a single layer structure of a transparent metal oxide layer. The segment electrode 16 has a single layer structure of a low resistance metal layer. The common electrode 17 has a single layer structure of a transparent metal oxide layer. Although not shown, the segment output terminal 21, the common output terminal 22, the input terminal 23, the segment output wiring 24, the external connection terminal 25 and the input wiring 26 are transparently oxidized. It has a single layer structure of metal layers.

  Thus, in this liquid crystal display element, in particular, a portion of the common output wiring 30 (the same as the common output wiring indicated by reference numeral 29 in FIG. 3) in the region inside the inner wall surface of the sealing material 13 is provided with a low resistance. Since the metal layer 30a has a single-layer structure, a necessary low resistance value can be ensured even if the width of the common output wiring 30 is relatively narrow. As a result, in FIGS. 1 to 3, the width of the routing area of the common output wirings 29 and 30 on the left outer side and the right outer side of the display area 15 can be reduced, and thus the width of the frame can be reduced.

  Further, in this liquid crystal display element, the common output wirings 29 and 30 have a single layer structure of a transparent metal oxide layer within the width of the sealing material 13 and outside the outer wall surface, so that moisture adheres to these wirings. Even if it does not corrode.

  Next, FIG. 9 shows a sectional view similar to FIG. 5 of a liquid crystal display device as a fifth embodiment of the present invention. This liquid crystal display element is of a reflective type, and a portion of the common output wiring 30 (the same as the common output wiring indicated by reference numeral 29 in FIG. 3) in the region inside the inner wall surface of the sealing material 13 is a low resistance metal. It has a two-layer structure in which a transparent metal oxide layer 30b is provided on the layer 30a, and the other part has a one-layer structure of a transparent metal oxide layer.

  The segment substrate side common terminal 28 (the same as the segment substrate side common terminal denoted by reference numeral 27 in FIG. 3) has a two-layer structure in which a transparent metal oxide layer 28b is provided on a low resistance metal layer 28a. The common substrate side common terminal 32 (the same as the common substrate side common terminal indicated by reference numeral 31 in FIG. 4) has a single layer structure of a transparent metal oxide layer. The segment electrode 16 has a two-layer structure in which a transparent metal oxide layer 16b is provided on a low resistance metal layer 16a. The common electrode 17 has a single layer structure of a transparent metal oxide layer. Although not shown, the segment output terminal 21, the common output terminal 22, the input terminal 23, the segment output wiring 24, the external connection terminal 25 and the input wiring 26 are transparently oxidized. It has a single layer structure of metal layers.

  Thus, in this liquid crystal display element, in particular, a portion of the common output wiring 30 (the same as the common output wiring indicated by reference numeral 29 in FIG. 3) in the region inside the inner wall surface of the sealing material 13 is provided with a low resistance. Since it has a two-layer structure in which the transparent metal oxide layer 30b is provided on the metal layer 30a, a necessary low resistance value can be ensured even if the width of the common output wiring 30 is relatively narrow. As a result, in FIGS. 1 to 3, the width of the routing area of the common output wirings 29 and 30 on the left outer side and the right outer side of the display area 15 can be reduced, and thus the width of the frame can be reduced.

  Further, in this liquid crystal display element, the common output wirings 29 and 30 have a single layer structure of a transparent metal oxide layer within the width of the sealing material 13 and outside the outer wall surface, so that moisture adheres to these wirings. Even if it does not corrode.

  Next, FIG. 10 is a sectional view similar to FIG. 5 of a liquid crystal display device as a sixth embodiment of the present invention. This liquid crystal display element is of a reflective type, and a portion of the common output wiring 30 (the same as the common output wiring indicated by reference numeral 29 in FIG. 3) in the region inside the inner wall surface of the sealing material 13 is transparent metal oxide. The layer 30b has a two-layer structure in which a low-resistance metal layer 30a is provided, and the other part has a one-layer structure of a transparent metal oxide layer.

  The segment substrate side common terminal 28 (same as the segment substrate side common terminal denoted by reference numeral 27 in FIG. 3) has a two-layer structure in which a low resistance metal layer 28a is provided on a transparent metal oxide layer 28b. The common substrate side common terminal 32 (the same as the common substrate side common terminal indicated by reference numeral 31 in FIG. 4) has a single layer structure of a transparent metal oxide layer. The segment electrode 16 has a two-layer structure in which a low resistance metal layer 16a is provided on a transparent metal oxide layer 16b. The common electrode 17 has a single layer structure of a transparent metal oxide layer. Although not shown, the segment output terminal 21, the common output terminal 22, the input terminal 23, the segment output wiring 24, the external connection terminal 25 and the input wiring 26 are transparently oxidized. It has a single layer structure of metal layers.

  Thus, in this liquid crystal display element, in particular, the portion of the common output wiring 30 (the same as the common output wiring indicated by reference numeral 29 in FIG. 3) in the region inside the inner wall surface of the sealing material 13 is transparent oxidation. Since it has a two-layer structure in which the low-resistance metal layer 30a is provided on the metal layer 30b, a necessary low resistance value can be ensured even if the width of the common output wiring 30 is relatively narrow. As a result, in FIGS. 1 to 3, the width of the routing area of the common output wirings 29 and 30 on the left outer side and the right outer side of the display area 15 can be reduced, and thus the width of the frame can be reduced.

  Further, in this liquid crystal display element, the common output wirings 29 and 30 have a single layer structure of a transparent metal oxide layer within the width of the sealing material 13 and outside the outer wall surface. It is possible to prevent corrosion even if it adheres.

  Further, in this liquid crystal display element, for example, a portion of the common output wiring 30 inside the sealing material 13 has a two-layer structure in which the low-resistance metal layer 30a is provided on the transparent metal oxide layer 30b. The transparent metal oxide layer and the low resistance metal layer can be successively formed in this order, and the formed low resistance metal layer and the transparent metal oxide layer can be patterned in this order.

  On the other hand, in the case of the fifth embodiment shown in FIG. 9, a transparent metal oxide layer is formed, then the formed transparent metal oxide layer is patterned, and then a low resistance metal layer is formed. Next, the formed low resistance metal layer is patterned. Therefore, in the case of the present embodiment, the transparent metal oxide layer and the low resistance metal layer can be successively formed in this order as compared with the fifth embodiment shown in FIG. Can be improved.

  7 to 10, when the low-resistance metal layer 30 a is a material that is easily corroded when formed within the width of the sealing material 15, the end face of the low-resistance metal layer 30 a is expected to vary in the sealing material 15. You may make it locate in the inner side area | region of the inner wall surface of the sealing material 15, and the outer side area | region of an outer wall surface by the distance. In any case, on the outside of the sealing material 13, all the wirings including the common output wirings 29 and 30 have a single layer structure of a transparent metal oxide layer so that even if moisture adheres to these wirings, they do not corrode. Can be.

  By the way, in the said embodiment, although the segment output wiring 24 is made into 1 layer structure of a transparent metal oxide layer, as shown in FIG. 2, the routing area | region of the segment output wiring 24 inside the outer wall surface of the sealing material 13 is shown. Is relatively small, its resistance value is not a problem. However, it goes without saying that the segment output wiring 24 inside the outer wall surface of the sealing material 13 may have a low resistance as in the case of the common output wirings 29 and 30.

  In the above embodiment, the segment output terminal 21, the common output terminal 22, and the input terminal 23 have a single-layer structure of a transparent metal oxide layer. A two-layer structure of a metal layer and a metal layer having a lower resistance than that of the transparent metal oxide layer may be used. In this case, by combining the wirings 30a and 30b illustrated in FIG. 10 and forming each terminal with a metal layer having a lower resistance than the transparent metal oxide layer on the transparent metal oxide layer, production can be efficiently performed. can do.

  Further, in the above embodiment, the segment electrode 16 and the common electrode 17 are simple matrix type liquid crystal display elements arranged in a straight line on the segment substrate 1 and the common substrate 2, respectively. The present invention can also be applied to an active matrix type liquid crystal display element in which a data electrode is formed on an active substrate and a common electrode is formed on a counter substrate. In this case, the data electrode is connected to either or both of a scanning electrode and a data electrode. In the wiring, the resistance in the inner region of the inner wall surface of the sealing material may be reduced.

The top view of the principal part of the liquid crystal display element as 1st Embodiment of this invention. FIG. 2 is a partial transmission plan view of the liquid crystal display element shown in FIG. 1. The top view of a part of segment board | substrate shown in FIG. FIG. 2 is a transmission plan view of a part of the common substrate shown in FIG. 1. FIG. 3 is a cross-sectional view of a portion along a line AA in FIG. 2 and a part of a display region. Sectional drawing similar to FIG. 5 of the liquid crystal display element as 2nd Embodiment of this invention. Sectional drawing similar to FIG. 5 of the liquid crystal display element as 3rd Embodiment of this invention. Sectional drawing similar to FIG. 5 of the liquid crystal display element as 4th Embodiment of this invention. Sectional drawing similar to FIG. 5 of the liquid crystal display element as 5th Embodiment of this invention. Sectional drawing similar to FIG. 5 of the liquid crystal display element as 6th Embodiment of this invention. FIG. 10 is a partial cross-sectional view of an example of a conventional liquid crystal display element. Sectional drawing of a part of other example of the conventional liquid crystal display element.

Explanation of symbols

11 Segment substrate 12 Common substrate 13 Sealing material 14 Liquid crystal 15 Display region 16 Segment electrode 16a Low resistance metal layer 16b Transparent metal oxide layer 17 Common electrode 18 Semiconductor chip mounting region 19 Semiconductor chip 21 Segment output terminal 22 Common output terminal 23 Input Terminal 24 Segment output wiring 25 External connection terminal 26 Input wiring 27, 28 Segment substrate side common terminal 28a Low resistance metal layer 28b Transparent metal oxide layer 29, 30 Common output wiring 30a Low resistance metal layer 30b Transparent metal oxide layer 31, 32 Common substrate side common terminal 33 Conductive material

Claims (8)

  The first substrate and the second substrate are sealed with a sealing material, a display region is formed in an inner region of the sealing material, a plurality of first electrodes in the display region, and orthogonal to the first electrode A plurality of second electrodes are disposed, a first terminal and a second terminal are disposed in an outer region of the sealing material, and the first electrode and the first terminal are disposed in an outer region of the display region. In the liquid crystal display element in which the first wiring for connecting the second electrode and the second wiring for connecting the second electrode and the second terminal are disposed, the first region in the region outside the outer wall surface of the sealing material is disposed. And the second wiring in a region outside the outer wall surface of the sealing material is formed of a transparent metal oxide, and at least the second wiring is between the outside of the inner wall surface of the sealing material and the display region. A liquid crystal display characterized by being formed of a metal having a lower resistance than that of a transparent metal oxide. Child.   The invention according to claim 1, wherein the first terminal, the first wiring, the first electrode, the second terminal, and the second wiring are formed on the first substrate, 2. The liquid crystal display element according to claim 2, wherein the second electrode is formed on the second substrate, and the second electrode and the second wiring are connected via a conductive material.   The invention according to claim 1, wherein the first substrate has a protruding portion protruding from one side of the second substrate, and the first terminal and the second terminal are formed in the protruding portion. A liquid crystal display element formed in a semiconductor chip mounting region.   4. The liquid crystal display element according to claim 3, wherein the second wiring is routed to a pair of opposing side surfaces of the display region.   5. The liquid crystal display element according to claim 4, wherein the second wiring is routed to the side surface opposite to the display area every other one of the second terminal arrays. .   In the invention according to claim 1, the second wiring includes a metal layer having a lower resistance than the transparent metal oxide and a transparent metal oxide layer at least between the outer side of the inner wall surface of the sealing material and the display region. A liquid crystal display element having a two-layer structure.   7. The liquid crystal display element according to claim 6, wherein the transparent metal oxide layer is formed on a metal layer having a resistance lower than that of the transparent metal oxide.   8. The liquid crystal display element according to claim 7, wherein the first electrode has the transparent metal oxide layer formed on a metal layer having a resistance lower than that of the transparent metal oxide.

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