CN206990966U - Circuit substrate and display device - Google Patents

Abstract

The utility model provides a circuit substrate and a display device capable of positioning the substrate with high precision. The circuit board includes: a first board provided with a first alignment mark including a first extending portion extending along a first direction, and a first wiring extending along a second direction intersecting the first direction; 2. A substrate provided with a second alignment mark including a first linear portion extending along a first direction, and a second wiring opposed to the first wiring, and the second substrate is opposed to a part of the first substrate. The configuration is that the first extension part is disposed outside the region of the first substrate overlapping with the second substrate.

Description

Circuit board and display device

technical field

The utility model relates to a circuit substrate and a display device.

Background technique

A display panel such as a liquid crystal display panel or an organic EL display panel is connected via a flexible substrate to a printed circuit board on which a drive circuit for display driving and the like are mounted. In the connection between the flexible substrate and the printed circuit board, or the connection between the display panel and the printed circuit board, alignment marks are used as a reference for positioning. In the following Patent Document 1, the exposed portion of the dummy connection terminal of the circuit board is used as a mark, and the connection between the circuit board and the FPC board is performed by aligning the connection terminal of the FPC board and the exposed portion of the dummy connection terminal in a straight line. position.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2011-129554.

Utility model content

In Patent Document 1, although the FPC board can be positioned in the direction in which a plurality of dummy connection terminals are arranged, there is a possibility that the FPC board cannot be positioned with high accuracy in the direction in which the dummy connection terminals extend.

An object of the present invention is to provide a circuit board and a display device capable of positioning the board with high precision.

A circuit substrate according to an aspect of the present invention includes: a first substrate provided with a first alignment mark including a first extension extending along a first direction; and a second alignment mark extending along a second direction intersecting the first direction. a first wiring extending in a direction; and a second substrate provided with a second alignment mark including a first linear portion extending in the first direction and a second wiring opposing the first wiring, In addition, the second substrate is disposed facing a part of the first substrate, and the first extension portion is provided outside a region of the first substrate overlapping with the second substrate.

In the circuit board according to an aspect of the present invention, a plurality of the first extending portions are arranged in the second direction, and the first linear portion is adjacent to the second extending portion in the second direction. The distance between the first extending parts is arranged linearly.

In the circuit board according to one aspect of the present invention, the width of the space is larger than the width of the first linear portion.

In the circuit board according to one aspect of the present invention, the first linear portion and the first extension portion are arranged linearly.

In the circuit board according to one aspect of the present invention, the width of the first extending portion is larger than the width of the first linear portion.

In the circuit board according to one aspect of the present invention, the first extension portion is arranged at a distance from the outer edge of the second board.

In the circuit board according to one aspect of the present invention, the first extension portion is provided outside a region overlapping the second substrate and a region overlapping the second substrate.

In the circuit board according to one aspect of the present invention, the first extension portion includes a first portion and a second portion arranged along the first direction with a slit portion interposed therebetween, and the outer edge of the second board is It is disposed opposite to the slit portion.

In the circuit board according to an aspect of the present invention, the end of the second wiring is disposed inside the outer edge of the second substrate, and the end of the first linear portion extends to the first line. 2 the outer edge of the substrate.

In the circuit board according to one aspect of the present invention, the first alignment mark includes a circular portion, and the second alignment mark includes a wire that is connected to the first linear portion and connects the circular portion. At least a partially enclosed annular portion.

In the circuit substrate according to an aspect of the present invention, the first alignment mark includes a second extension portion extending along the second direction and provided on the first substrate and the second extension portion. Outside the area where the second substrate overlaps, the second alignment mark includes a second linear portion extending along the second direction.

In the circuit board according to an aspect of the present invention, the second substrate is a flexible substrate having flexibility and a light transmittance higher than that of the first substrate.

A display device according to an aspect of the present invention includes the circuit board described above, and a display panel connected to the second board.

Description of drawings

FIG. 1 is a cross-sectional view showing a schematic cross-sectional structure of a display device according to a first embodiment.

Fig. 2 is a top view of the display device.

FIG. 3 is a plan view of a first substrate.

FIG. 4 is a plan view of a second substrate.

FIG. 5 is a plan view showing the relationship between the first substrate and the second substrate.

Fig. 6 is a sectional view taken along line IV-IV' of Fig. 5 .

7 is a side view showing an example of a positioning method between a first substrate and a second substrate.

8 is a plan view showing the relationship between the first alignment mark and the second alignment mark in the first embodiment.

9 is a plan view showing a relationship between a first alignment mark and a second alignment mark according to a first modified example of the first embodiment.

10 is a plan view showing a relationship between a first alignment mark and a second alignment mark according to a second modified example of the first embodiment.

11 is a plan view showing a relationship between a first alignment mark and a second alignment mark according to a third modified example of the first embodiment.

12 is a plan view showing a relationship between a first alignment mark and a second alignment mark according to a fourth modification of the first embodiment.

13 is a plan view showing a relationship between a first alignment mark and a second alignment mark according to a fifth modified example of the first embodiment.

14 is a plan view showing the relationship between the first alignment mark and the second alignment mark in the second embodiment.

15 is a plan view showing a relationship between a first alignment mark and a second alignment mark according to a first modified example of the second embodiment.

16 is a plan view showing a relationship between a first alignment mark and a second alignment mark according to a second modified example of the second embodiment.

Explanation of reference signs

1 display device

6 liquid crystal layer

8 Circuit board

10 display panel

13 Anisotropic conductive adhesive materials

19 Display control IC

21 Lower base plate

31 Upper base plate

51 1st substrate

52 1st Wiring

53 Dummy wiring

55, 55A, 55B 1st alignment mark

56A, 56B, 56C, 56D, 56E 1st extension

57A, 57B, 57C 2nd extension

58 circular part

61 Second board

62 2nd wiring

63 basement membrane

64 cover film

65, 65A, 65B 2nd alignment mark

65X Connector

66A, 66B 1st linear part

67 2nd linear part

69 Annulus

75 Adhesive alignment part

SL1 1st slit part

SL2 2nd slit part

SL3 3rd slit part

SL4a, SL4b, SL4c 4th slit

SL5a, SL5b 5th slit

SL6a, SL6b 6th slit

SL7 7th slit

detailed description

A mode (embodiment) for implementing the present invention will be described in detail with reference to the drawings. This invention is not limited by the content described in the following embodiment. In addition, the constituent elements described below include constituent elements that can be easily conceived by those skilled in the art, and substantially the same constituent elements. In addition, the constituent elements described below can be appropriately combined. In addition, the disclosure is only an example at all times, and those skilled in the art can easily conceive of appropriate changes that retain the gist of the invention and are naturally included in the scope of the invention. In addition, in order to clarify the description, the drawings may schematically show the width, thickness, shape, etc. of each part compared with the actual form, but this is always an example and does not limit the interpretation of the present invention. In addition, in this specification and each drawing, the same code|symbol is attached|subjected to the same element as the said figure mentioned already, and detailed description may be omitted suitably.

(first embodiment)

FIG. 1 is a cross-sectional view showing a schematic cross-sectional structure of a display device according to a first embodiment. Fig. 2 is a top view of the display device. The display device 1 of the present embodiment includes a display panel 10 and a circuit board 8 . As shown in FIG. 1 , the display panel 10 includes: a pixel substrate 2; a counter substrate 3 arranged to face the surface of the pixel substrate 2 in a direction perpendicular to the surface of the pixel substrate 2; and a liquid crystal layer as a display function layer. 6 , which is located between the pixel substrate 2 and the opposite substrate 3 .

The pixel substrate 2 includes a lower substrate 21 as a circuit substrate, a pixel electrode 22 , and a common electrode COML. The lower substrate 21 is, for example, a glass substrate or a resin substrate. The common electrode COML is disposed on the lower substrate 21. The pixel electrodes 22 are provided on the upper side of the common electrode COML with an insulating layer 24 interposed therebetween, and are arranged in a plurality in a matrix in a plan view. In addition, a polarizing plate 26 may be provided on the lower side of the lower substrate 21 through the adhesive layer 25 . For the pixel electrode 22 and the common electrode COML, a light-transmitting conductive material such as ITO (Indium Tin Oxide) is used.

The counter substrate 3 includes an upper substrate 31 and a color filter 32 . The upper substrate 31 is, for example, a glass substrate or a resin substrate. A polarizer 36 is provided on the upper side of the upper substrate 31 via an adhesive layer 35 . The color filter 32 is provided on a surface of the upper substrate 31 that faces the lower substrate 21 , and faces the liquid crystal layer 6 in a direction perpendicular to the lower substrate 21 . The color filter 32 can periodically arrange color regions colored in three colors, for example, red (R), green (G), and blue (B). One color region is provided corresponding to one pixel electrode 22 , and one set of three color regions constitutes one pixel. In addition, the color filter 32 is not limited to a combination of three colors, but may be a combination of four or more colors. In addition, the color filter 32 may also be disposed on the lower substrate 21 .

The lower substrate 21 and the upper substrate 31 are arranged facing each other with a predetermined interval provided via the spacer 27 . A liquid crystal layer 6 is provided between the lower substrate 21 and the upper substrate 31 . The liquid crystal layer 6 is used to modulate passing light according to the state of the electric field. For example, liquid crystals in a transverse electric field mode such as IPS (In-Plane Switching) including FFS (Fringe Field Switching: Fringe Field Switching) are used. Alternatively, an alignment film may be provided between the liquid crystal layer 6 and the pixel substrate 2 and between the liquid crystal layer 6 and the counter substrate 3 shown in FIG. 1 .

A backlight (not shown) is provided under the lower substrate 21 . The backlight has light sources such as LEDs, for example, and emits light from the light sources toward the lower substrate 21 . Light from the backlight passes through the pixel substrate 2, and the part where the light is not emitted and the part where the light is emitted are switched according to the state of the liquid crystal at the position, thereby displaying an image on the display surface 10A (see FIG. 2 ).

In this embodiment, the display panel 10 has been described as a liquid crystal display panel in a transverse electric field mode, but the present invention is not limited thereto. The display panel 10 may also be a vertical electric field mode liquid crystal display panel. The liquid crystal display panel in the vertical electric field mode sandwiches the liquid crystal layer between the pixel electrode and the common electrode, and drives the liquid crystal along a direction at right angles to the substrate surface. There are, for example, TN (Twisted Nematic: Twisted Nematic), VA (Vertical Alignment: Vertical Alignment) and the like in the liquid crystal display panel of the longitudinal electric field mode.

As shown in FIGS. 1 and 2 , the circuit board 8 includes a first substrate 51 and a second substrate 61 . The display panel 10 is connected to the first substrate 51 via the second substrate 61 . The lower substrate 21 has a terminal portion 21A protruding outward from the upper substrate 31 . One end side of the second substrate 61 is connected to the terminal portion 21A. The other end side of the second substrate 61 is connected to the first substrate 51 . A flexible printed circuit board (FPC: Flexible Printed Circuit) can be used as the second substrate 61 .

For the first substrate 51 , for example, a printed wiring board (PWB: Printed Wiring Board) made of resin can be used. The first substrate 51 is thicker than the second substrate 61 and has rigidity. The first substrate 51 is a drive circuit substrate on which the IC 19 for display control is mounted. The IC 19 for display control is a chip of an IC driver, and includes various circuits necessary for display operation. The display control IC 19 supplies, for example, an image signal to the pixel electrode 22 to control a display operation.

In this embodiment, two first substrates 51 are connected to the display panel 10 , but the present invention is not limited thereto, and one first substrate 51 may be connected. In addition, a plurality of second substrates 61 are connected to one first substrate 51 , but one second substrate 61 may be connected to one first substrate 51 . The display panel 10 is not limited to a liquid crystal display panel, and may be an organic EL display panel. A touch panel may be provided on the display surface 10A of the display panel 10 .

Next, the connection structure between the first substrate 51 and the second substrate 61 will be described. FIG. 3 is a plan view of a first substrate. FIG. 4 is a plan view of a second substrate. FIG. 5 is a plan view showing the relationship between the first substrate and the second substrate. Fig. 6 is a sectional view taken along line VI-VI' of Fig. 5 . In this embodiment, the direction along the side of the first substrate 51 to which the second substrate 61 is connected is referred to as the first direction Dx, and the direction intersecting the first direction Dx is referred to as the second direction Dy. .

As shown in FIG. 3 , the first wiring 52 and the first alignment mark 55 are provided on the first substrate 51 . The first alignment mark 55 is arranged on the outer edge side of the first substrate 51 relative to the first wiring 52 in the first direction Dx. Further, outside the first alignment mark 55, the dummy wiring 53 is arranged. The dummy wiring 53 has substantially the same shape as the first wiring 52 , and is a wiring that is not connected to the second wiring 62 of the second substrate 61 described later. For the first wiring 52 , the first alignment mark 55 , and the dummy wiring 53 , metal materials having good conductivity, such as copper (Cu), silver (Ag), or alloys thereof, are used.

The first wiring 52 extends along the second direction Dy, and is arranged in plural along the first direction Dx. The first wiring 52 is electrically connected to the display control IC 19 (omitted in FIG. 3 ). The first wiring 52 is connected to the second wiring 62 of the second substrate 61 via the anisotropic conductive adhesive 13 in the connection region C indicated by the dashed-two dotted line in FIG. 3 . In this embodiment, the bonding alignment part 75 may be provided between the dummy wiring 53 and the dummy wiring 53 . The adhesive alignment portion 75 extends along the first direction Dx, and the anisotropic conductive adhesive 13 can be positioned along the adhesive alignment portion 75 .

The first alignment mark 55 includes a first portion 56 , a second portion 57 , and a circular portion 58 . The first portion 56 includes first extension portions 56A, 56B, and 56C extending along the first direction Dx. The second portion 57 includes second extension portions 57A, 57B extending along the second direction Dy. The first extension portions 56A, 56B, and 56C are arranged at intervals in the second direction Dy. A first slit portion SL1 is formed between the first extending portion 56A and the first extending portion 56B, and a second slit portion SL2 is formed between the first extending portion 56B and the first extending portion 56C. The first slit portion SL1 and the second slit portion SL2 extend along the first direction Dx. One end of the first extensions 56A, 56B, and 56C is connected to one dummy wiring 53 , and the other end of the first extensions 56A, 56B, and 56C is connected to the other dummy wiring 53 .

The second extension portions 57A, 57B are arranged at intervals in the first direction Dx. A third slit portion SL3 is formed between the second extending portion 57A and the second extending portion 57B. The third slit portion SL3 extends along the second direction Dy. The second extending portions 57A, 57B have the same width as the first wiring 52, and the distance between the second extending portion 57A and the second extending portion 57B (the width W3 of the third slit portion SL3) is equal to that of the first wiring. 52 are spaced the same size from each other. The present invention is not limited thereto, and the second extension portions 57A, 57B may have a width different from that of the first wiring 52 . In addition, the distance between the second extending portion 57A and the second extending portion 57B may be different from the distance between the first wiring lines 52 .

The circular portion 58 is arranged at a position where an extension line of the second slit portion SL2 intersects an extension line of the third slit portion SL3.

In FIG. 3 , an overlapping region D of the first substrate 51 that overlaps the second substrate 61 is indicated by a two-dot chain line. The first extending portions 56A, 56B, and 56C and the second extending portions 57A, 57B are continuously provided in the overlapping area D and the area outside the overlapping area D. As shown in FIG.

As shown in FIGS. 4 and 6 , the second substrate 61 includes a base film 63 and a cover film 64 . As shown in FIG. 6 , the second wiring 62 is provided on the base film 63 , and the cover film 64 is provided to cover the second wiring 62 . On the end side of the second substrate 61 , a part of the second wiring 62 is exposed from the cover film 64 .

As shown in FIG. 4 , the second wiring 62 and the second alignment mark 65 are provided on the second substrate 61 . The second alignment mark 65 is arranged on the outer edge side of the second substrate 61 relative to the second wiring 62 in the first direction Dx. In addition, the second alignment mark 65 is arranged at a position exposed from the cover film 64 . In addition, FIG. 4 is a plan view of the second substrate 61 viewed from the base film 63 side, and the second wiring 62 and the second alignment mark 65 are shown by solid lines for easy viewing.

The second wiring 62 extends along the second direction Dy, and is arranged in plural along the first direction Dx. The second wiring 62 has the same pitch as the first wiring 52 . The second wiring 62 has a smaller width than the first wiring 52, but may have the same width. For the second wiring 62 and the second alignment mark 65, a metal material having good electrical conductivity, such as copper (Cu), silver (Ag), or an alloy thereof, is used.

As shown in FIG. 4 , the second alignment mark 65 includes first linear portions 66A, 66B extending along the first direction Dx, a second linear portion 67 extending along the second direction Dy, and an annular portion 69. . The first linear portion 66A is connected to the annular portion 69 and extends to the outer edge of the second substrate 61 on the first direction Dx side. The second linear portion 67 is connected to the annular portion 69 and extends to the outer edge of the second substrate 61 on the second direction Dy side. The first linear portion 66B is connected to the second linear portion 67 , provided parallel to the first linear portion 66A, and extends to the outer edge of the second substrate 61 on the first direction Dx side.

As shown in FIG. 5 , the second substrate 61 is arranged to face a part of the first substrate 51 , and is positioned based on the first alignment mark 55 and the second alignment mark 65 . In a state where the second substrate 61 is positioned with respect to the first substrate 51 , the plurality of second wirings 62 and the plurality of first wirings 52 respectively face each other.

As shown in FIG. 6 , the first wiring 52 and the second wiring 62 exposed from the cover film 64 are electrically connected through the anisotropic conductive adhesive 13 . The second wiring 62 is connected to the display panel 10 (see FIG. 1 ), and supplies a control signal from the display control IC 19 mounted on the first substrate 51 to the display panel 10 .

Anisotropic conductive film (ACF: Anisotropic Conductive Film) and anisotropic conductive paste (ACP: Anisotropic Conductive Paste) can be used for the anisotropic conductive adhesive material 13 .

7 is a side view showing an example of a positioning method between a first substrate and a second substrate. 8 is a plan view showing the relationship between the first alignment mark and the second alignment mark in the first embodiment.

As shown in FIG. 7 , the first substrate 51 is aligned and placed on the mounting table 104 . The anisotropic conductive adhesive material 13 is provided to cover the first wiring 52 of the first substrate 51 . The second substrate 61 is temporarily fixed in a state of facing the first substrate 51 with the anisotropic conductive adhesive 13 interposed therebetween. At this time, the light source 101 is installed below the mounting table 104 , and the camera 102 is installed above the mounting table 104 . In addition, the alignment method shown in FIG. 7 is always an example, and can be changed suitably. For example, the light source 101 may be provided on the upper side of the mounting table 104 .

The first alignment mark 55 and the second alignment mark 65 are made of a metal material that does not transmit light, and the light transmittance of the first substrate 51 and the second substrate 61 is higher than that of the first alignment mark 55 and the second alignment mark 65 . Therefore, when light from the light source 101 passes through the first substrate 51 and the second substrate 61 , it is blocked at the portion where the first alignment mark 55 and the second alignment mark 65 are provided. Accordingly, the shape of the first alignment mark 55 and the shape of the second alignment mark 65 can be observed with the camera 102 .

As shown in FIG. 8 , the second substrate 61 is opposed to the first substrate 51 so that the circular portion 58 of the first alignment mark 55 is enclosed in the annular portion 69 of the second alignment mark 65 . Thereby, rough alignment of the second substrate 61 can be performed. Further, fine adjustment of the second substrate 61 is performed so that the second linear portion 67 and the third slit portion SL3 between the second extending portion 57A and the second extending portion 57B are substantially linearly arranged. Accordingly, alignment of the second substrate 61 in the first direction Dx can be performed.

Here, since the width W6 of the second linear portion 67 is equal to the width W3 of the third slit portion SL3 , the alignment of the second substrate 61 in the first direction Dx can be performed with high precision.

The fine adjustment of the second substrate 61 is performed so that the first linear portion 66A and the first slit portion SL1 between the first extending portion 56A and the first extending portion 56B are substantially linearly arranged. At this time, the fine adjustment of the second substrate 61 is performed so that the first linear portion 66B and the second slit portion SL2 between the first extending portion 56B and the first extending portion 56C are substantially linearly arranged. Thereby, alignment in the second direction Dy of the second substrate 61 can be performed.

Here, the arrangement of each linear portion and each slit portion in a straight line is not limited to the case where the long side of the linear portion coincides with the long side of the extension portion and is arranged in a straight line, and it also includes the case where the linear portion is aligned with the long side of the extension portion. In the case of errors in the bit process. For example, there may be a slight level difference between the long side of the linear portion and the long side of the extension portion, or the long side of the linear portion may have a slight inclination relative to the long side of the extension portion.

The width W4 of the first linear portion 66A is equal to the width W1 of the first slit portion SL1. The width W5 of the first linear portion 66B is equal to the width W2 of the second slit portion SL2. Thereby, the alignment of the 2nd board|substrate 61 in the 2nd direction Dy can be performed with high precision. Moreover, since the 2nd alignment mark 65 has two linear parts, 1st linear part 66A and 1st linear part 66B, the 2nd alignment mark 65 can be visually recognized easily.

In this manner, alignment of the second substrate 61 in the first direction Dx and alignment of the second substrate 61 in the second direction Dy can be performed with reference to the first alignment mark 55 and the second alignment mark 65 . Thereby, as shown in FIG. 5 , the second substrate 61 is arranged such that the second wiring 62 overlaps the first wiring 52 . Then, in a state where the first wiring 52 and the second wiring 62 are accurately aligned, the second substrate 61 and the first substrate 51 are crimped using a crimping jig not shown. Thus, the second substrate 61 is fixed to the first substrate 51 via the anisotropic conductive adhesive 13 , and the second wiring 62 is electrically connected to the first wiring 52 . With such a connection structure, even when the pitch of the first wiring 52 is small, the second wiring 62 and the first wiring 52 can be reliably connected by aligning the second substrate 61 with high precision.

As described above, the first substrate 51 is thicker than the second substrate 61, and the light transmittance is smaller than that of the second substrate 61. Therefore, there is an area where the first substrate 51 and the second substrate 61 overlap, and it is difficult to visually recognize the first substrate. The case of the first alignment mark 55 of 51. Since the anisotropic conductive adhesive 13 is provided between the second substrate 61 and the first substrate 51, it may be difficult to visually recognize the first alignment mark 55 at the portion overlapping the anisotropic conductive adhesive 13. .

In the present embodiment, the first extending portions 56A, 56B, and 56C and the second extending portions 57A, 57B of the first alignment mark 55 are provided outside the region of the first substrate 51 overlapping the second substrate 61 . Specifically, the first extension portions 56A, 56B, and 56C extend outward from the outer edge of the second substrate 61 on the first direction Dx side. The second extension portions 57A and 57B extend outward from the outer edge of the second substrate 61 on the second direction Dy side. Therefore, the first extending portions 56A, 56B, and 56C and the second extending portions 57A, 57B can be visually recognized outside the region of the first substrate 51 overlapping with the second substrate 61 . Therefore, alignment can be performed with high precision based on the first alignment mark 55 and the second alignment mark 65 . In addition, in this embodiment, the first extending portions 56A, 56B, 56C and the second extending portions 57A, 57B are continuously provided from the region overlapping the second substrate 61 to the outside of the region overlapping the second substrate 61 . It is not limited to this. The first extensions 56A, 56B, 56C and the second extensions 57A, 57B may be provided at least outside the area overlapping the second substrate 61 , or may be arranged at a predetermined interval from the outer edge of the second substrate 61 .

The first linear portions 66A, 66B and the second linear portion 67 extend to the outer edge of the second substrate 61 , so that the first extending portions 56A, 56B arranged outside the second substrate 61 can be accurately formed. , 56C and the alignment between the second extensions 57A, 57B. On the other hand, as shown in FIG. 4 , the end portion of the second wiring 62 in the second direction Dy is located inside the outer edge of the second substrate 61 . This prevents external foreign matter from coming into contact with the second wiring 62 , and prevents short-circuiting and corrosion between the second wiring 62 .

In this embodiment, the 1st linear part 66A, 66B is aligned so that the 2nd slit part SL2 and the 1st slit part SL1 may become a substantially linear form. Therefore, the contrast (brightness and darkness) of the 1st alignment mark 55 and the 2nd alignment mark 65 can be recognized favorably, and alignment can be performed easily.

As described above, the circuit board 8 of the present embodiment includes the first board 51 provided with the first alignment mark 55 including the first extensions 56A, 56B, and 56C extending along the first direction Dx, and the first alignment mark 55 along the first direction Dx. a first wiring 52 extending in a second direction Dy intersecting the first direction Dx; and a second substrate 61 provided with a second alignment mark including first linear portions 66A, 66B extending in the first direction Dx 65, and the second wiring 62 opposite to the first wiring 52, and the second substrate 61 is disposed opposite to a part of the first substrate 51, and the first extension parts 56A, 56B, 56C are provided on the first substrate 51 and the second wiring. The outer side of the region where the two substrates 61 overlap.

Thereby, the alignment of the 2nd board|substrate 61 in the 2nd direction Dy can be performed using the 1st alignment mark 55 and the 2nd alignment mark 65 as a reference. In addition, even in the case where the first alignment mark 55 in the portion overlapping the second substrate 61 cannot be visually recognized, it is possible to utilize the first extending mark 55 provided outside the region overlapping the second substrate 61 of the first substrate 51 . Parts 56A, 56B, 56C to accurately perform alignment.

(First modified example of the first embodiment)

9 is a plan view showing a relationship between a first alignment mark and a second alignment mark according to a first modified example of the first embodiment. In this modified example, the width W1 of the first slit portion SL1 between the first extending portion 56A and the first extending portion 56B of the first alignment mark 55A is wider than that of the first linear portion 66A of the second alignment mark 65A. The width W4 is large. In addition, the width W2 of the second slit portion SL2 between the first extending portion 56B and the first extending portion 56C is larger than the width W5 of the first linear portion 66B. Furthermore, the width W3 of the third slit portion SL3 between the second extension portion 57A and the second extension portion 57B is larger than the width W6 of the second linear portion 67 .

In this modified example, 66 A of 1st linear parts are arrange|positioned so that it may enter into the range of the width direction of 1st slit part SL1. Moreover, the 1st linear part 66B is arrange|positioned so that it may enter into the range of the width direction of the 2nd slit part SL2. Accordingly, alignment of the second substrate 61 in the second direction Dy can be performed. The second linear portion 67 is arranged so as to enter the range of the third slit portion SL3 , and aligns the second substrate 61 in the first direction Dx. In this way, since a clearance is provided between the width of each slit portion and the width of each linear portion, the alignment of the second substrate 61 can be easily performed.

The difference between the width W3 of the third slit portion SL3 and the width W6 of the second linear portion 67 can be set to a smaller value than the interval between the first wirings 52 in the first direction Dx, for example. Thereby, the positioning of the second substrate 61 can be easily performed by providing a clearance, and the first wiring 52 and the second wiring 62 can be reliably connected. In addition, the difference between the width W1 of the first slit portion SL1 and the width W4 of the first linear portion 66A can be set larger than the difference between the width W3 of the third slit portion SL3 and the width W6 of the second linear portion 67 .

(Second modification of the first embodiment)

10 is a plan view showing a relationship between a first alignment mark and a second alignment mark according to a second modified example of the first embodiment. In the above-mentioned example, the first extending portions 56A, 56B, 56C and the second extending portions 57A, 57B of the first alignment marks 55, 55A continuously extend from the region overlapping the second substrate 61 of the first substrate 51 to the The outside of the region overlapping the second substrate 61 of the first substrate 51 is not limited thereto.

As shown in FIG. 10 , the first extension portion 56A of the first alignment mark 55B includes a first portion 56Aa and a second portion 56Ab. 1st part 56Aa and 2nd part 56Ab are arranged along 1st direction Dx via 4th slit part SL4a. The first portion 56Aa is provided outside the region of the first substrate 51 overlapping the second substrate 61 , and the second portion 56Ab is provided on the region of the first substrate 51 overlapping the second substrate 61 . The first portion 56Aa is arranged at a distance from the outer edge of the second substrate 61 .

The first extension portion 56B includes a first portion 56Ba and a second portion 56Bb. The 1st part 56Ba and the 2nd part 56Bb are arranged along the 1st direction Dx via the 4th slit part SL4b. The first portion 56Ba is provided outside the region of the first substrate 51 that overlaps the second substrate 61 , and the second portion 56Bb is provided on the region of the first substrate 51 that overlaps the second substrate 61 . The first portion 56Ba is arranged at a distance from the outer edge of the second substrate 61 .

The first extension portion 56C includes a first portion 56Ca and a second portion 56Cb. 1st part 56Ca and 2nd part 56Cb are arranged along 1st direction Dx via 4th slit part SL4c. The first portion 56Ca is provided outside the region of the first substrate 51 that overlaps the second substrate 61 , and the second portion 56Cb is provided on the region of the first substrate 51 that overlaps the second substrate 61 . The first portion 56Ca is arranged at a distance from the outer edge of the second substrate 61 . The fourth slit portions SL4a, SL4b, and SL4c are arranged along the second direction Dy.

The second extension portion 57A includes a first portion 57Aa and a second portion 57Ab. The first portion 57Aa and the second portion 57Ab are arranged along the second direction Dy via the fifth slit portion SL5a. The second extension portion 57B includes a first portion 57Ba and a second portion 57Bb. 1st part 57Ba and 2nd part 57Bb are arranged along 2nd direction Dy via 5th slit part SL5b. The first portions 57Aa and 57Ba are provided outside the region of the first substrate 51 overlapping the second substrate 61 , and the second portions 57Ab and 57Bb are provided on the region of the first substrate 51 overlapping the second substrate 61 . The first portions 57Aa and 57Ba are arranged at intervals from the outer edge of the second substrate 61 .

In this modified example, the first linear portion 66A of the second alignment mark 65B is arranged so as to be substantially linear with the first slit portion SL1 , and the alignment of the second substrate 61 is performed. At this time, the end part of 66 A of 1st linear parts is arrange|positioned between 4th slit part SL4a and 4th slit part SL4b. Moreover, the 1st linear part 66B is arrange|positioned so that it may become substantially linear with the 2nd slit part SL2. At this time, the end part of the 1st linear part 66B is arrange|positioned between 4th slit part SL4b and 4th slit part SL4c. In other words, the outer edge of the second substrate 61 on the first direction Dx side is disposed at a position facing the fourth slit portions SL4a, SL4b, and SL4c.

Thus, by arranging the first linear portion 66A and the first slit portion SL1 in a straight line, and by arranging the first linear portion 66B and the second slit portion SL2 in a straight line, the movement in the second direction Dy is performed. alignment of the second substrate 61. Furthermore, alignment of the second substrate 61 in the first direction Dx can be performed by using the first linear portions 66A, 66B and the fourth slit portions SL4a, SL4b, and SL4c.

Moreover, the 2nd linear part 67 of the 2nd alignment mark 65B is arrange|positioned so that it may become linear form substantially with the 3rd slit part SL3, and the alignment of the 2nd board|substrate 61 is performed. At this time, the end part of the 2nd linear part 67 is arrange|positioned between 5th slit part SL5a and 5th slit part SL5b. In other words, the outer edge of the second substrate 61 on the Dy side in the second direction is disposed at a position facing the fifth slit portions SL5a, SL5b.

Thereby, the alignment of the second substrate 61 in the first direction Dx can be performed by using the second linear portion 67 and the third slit portion SL3 , and the alignment of the second substrate 61 in the first direction Dx can be performed by using the second linear portion 67 and the fifth slit portion. Position alignment of the second substrate 61 in the second direction Dy is performed through SL5a and SL5b.

In this modified example, by providing the fourth slits SL4a, SL4b, SL4c and the fifth slits SL5a, SL5b in the first extensions 56A, 56B, 56C and the second extensions 57A, 57B, respectively, high precision can be achieved. Position alignment of the second substrate 61 is performed accordingly.

(Third modified example of the first embodiment)

11 is a plan view showing a relationship between a first alignment mark and a second alignment mark according to a third modified example of the first embodiment. In this modified example, the first alignment mark 55C includes first extending portions 56A, 56B and second extending portions 57A, 57B. The second alignment mark 65C includes a first linear portion 66A and a second linear portion 67 . 66 A of 1st linear parts and the 2nd linear part 67 are connected by the connection part 65X. The alignment of the second substrate 61 is performed so that the connecting portion 65X faces the circular portion 58 .

66 A of 1st linear parts are arrange|positioned so that the 1st slit part SL1 between 1st extension part 56A and 1st extension part 56B may become a substantially linear form. Moreover, the 2nd linear part 67 is arrange|positioned so that it may become substantially linear with the 3rd slit part SL3 between 2nd extension part 57A and 2nd extension part 57B. Thereby, the alignment of the second substrate 61 in the first direction Dx and the alignment of the second substrate 61 in the second direction Dy can be performed only by the alignment of two locations.

According to this modified example, the first alignment mark 55C and the second alignment mark 65C can be simplified. Therefore, the alignment of the second substrate 61 can be easily performed. In addition, even if the annular portion 69 is not provided on the second alignment mark 65C, since the first extending portions 56A, 56B and the second extending portions 57A, 57B are provided on the first substrate 51 and overlap the second substrate 61 Therefore, the alignment of the second substrate 61 can also be performed with high precision.

In addition, although the 1st linear part 66A and the 2nd linear part 67 are connected by the connection part 65X, it is not limited to this. The 1st linear part 66A and the 2nd linear part 67 may be mutually arrange|positioned at intervals.

(Fourth modified example of the first embodiment)

12 is a plan view showing a relationship between a first alignment mark and a second alignment mark according to a fourth modification of the first embodiment. The 1st alignment mark 55D of this modification is not provided with the above-mentioned 1st extension part 56A, 56B, 56C, and only the 2nd extension part 57A, 57B is provided. The 2nd alignment mark 65D is not provided with 1st linear part 66A, 66B, It consists only of the annular part 69 and the 2nd linear part 67.

Even in such an aspect, by arranging the second linear portion 67 and the third slit portion SL3 substantially linearly, alignment of the second substrate 61 in at least the first direction Dx can be performed. In addition, by providing the fifth slit portions SL5a, SL5b (not shown in FIG. 12 ) in the second extension portions 57A, 57B as shown in FIG. 10 , alignment of the second substrate 61 in the second direction Dy can be performed. .

In this modified example, the first alignment mark 55D and the second alignment mark 65D can be simplified. Since the first alignment mark 55D is not provided on the side of the second substrate 61 in the first direction Dx outside the region overlapping the second substrate 61 , the size of the first substrate 51 can be reduced.

(Fifth modification of the first embodiment)

13 is a plan view showing a relationship between a first alignment mark and a second alignment mark according to a fifth modified example of the first embodiment. The 1st alignment mark 55E of this modification is not provided with the above-mentioned 2nd extension part 57A, 57B, It has only the 1st extension part 56A, 56B. The second alignment mark 65E is not provided with the second linear portion 67 and is composed only of the annular portion 69 and the first linear portion 66A.

Even in such an aspect, by arranging the first linear portion 66A and the first slit portion SL1 substantially linearly, alignment of the second substrate 61 in at least the second direction Dy can be performed. In addition, by providing the fourth slits SL4a, SL4b (not shown in FIG. 13 ) in the first extensions 56A, 56B as shown in FIG. 10, the alignment of the second substrate 61 in the first direction Dx can be performed. .

In this modified example, the first alignment mark 55E is not provided on the second direction Dy side of the second substrate 61 outside the region overlapping the second substrate 61 , so that the first alignment mark 51 can be positioned on the second direction Dy side. Miniaturization in the second direction Dy.

(second embodiment)

14 is a plan view showing the relationship between the first alignment mark and the second alignment mark in the second embodiment. In this embodiment, the first alignment mark 55F includes first extending portions 56D and 56E and a second extending portion 57C. The first extending portion 56D and the first extending portion 56E extend along the first direction Dx, and are arranged at intervals from each other in the second direction Dy. The second extension portion 57C extends along the second direction Dy. The first extending portions 56D and 56E and the second extending portion 57C are continuously provided on the outside of the region overlapping the second substrate 61 and the region overlapping the second substrate 61 of the first substrate 51, respectively.

The second alignment mark 65F includes first linear portions 66A and 66B, a second linear portion 67 , and an annular portion 69 . The first linear portion 66A is connected to the annular portion 69 and extends along the first direction Dx. The second linear portion 67 is connected to the annular portion 69 and extends along the second direction Dy. The first linear portion 66B is connected to the second linear portion 67 and extends along the first direction Dx. The 1st linear part 66A and the 1st linear part 66B are mutually arrange|positioned at intervals in the 2nd direction Dy. The first linear portions 66A, 66B extend to the outer edge of the second substrate 61 on the first direction Dx side. The second linear portion 67 extends to the outer edge of the second substrate 61 on the second direction Dy side.

In the present embodiment, the first linear portion 66A and the first extending portion 56D are arranged substantially linearly. Moreover, the 1st linear part 66B and the 1st extension part 56E are arrange|positioned substantially linearly. Accordingly, alignment of the second substrate 61 in the second direction Dy can be performed. Moreover, the 2nd linear part 67 and the 2nd extension part 57C are arrange|positioned substantially linearly. Accordingly, alignment of the second substrate 61 in the first direction Dx can be performed.

In the present embodiment, the first linear portion 66A has the same width as the first extending portion 56D, and the first linear portion 66B has the same width as the first extending portion 56E. In addition, the second linear portion 67 has the same width as the second extending portion 57C. Therefore, when a level difference occurs between the first linear portion 66A and the first extension portion 56D, it is possible to visually recognize that the second substrate 61 is displaced. Therefore, the alignment of the second substrate 61 can be accurately performed.

In the present embodiment, the first extending portions 56D and 56E and the second extending portion 57C of the first alignment mark 55F are provided outside the region of the first substrate 51 overlapping the second substrate 61 . The first extension portions 56D and 56E extend outward from the outer edge of the second substrate 61 on the first direction Dx side. The second extension portion 57C extends outward from the outer edge of the second substrate 61 on the second direction Dy side. Therefore, the first extending portions 56D, 56E and the second extending portion 57C can be visually recognized outside the region overlapping the second substrate 61 of the first substrate 51, and therefore, the first alignment mark 55F and the second extending portion 57C can be visually recognized. 2 The alignment mark 65F is used as a reference to perform accurate alignment.

The first linear portions 66A, 66B and the second linear portion 67 extend to the outer edge of the second substrate 61 , so that the first extending portions 56D, 56E arranged outside the second substrate 61 can be accurately formed. Alignment with the second extension 57C.

(First modified example of the second embodiment)

15 is a plan view showing a relationship between a first alignment mark and a second alignment mark according to a first modified example of the second embodiment. In this modified example, the width W7 of the first extension portion 56D of the first alignment mark 55G is larger than the width W4 of the first linear portion 66A of the second alignment mark 65G. The width W8 of the first extending portion 56E is larger than the width W5 of the first linear portion 66B. The width W8 of the second extending portion 57C is larger than the width W6 of the second linear portion 67 .

The 1st linear part 66A is arrange|positioned so that it may enter into the range of the width direction of the 1st extension part 56D in the 2nd direction Dy. Moreover, the 1st linear part 66B is arrange|positioned so that it may enter into the range of the width direction of the 1st extension part 56E in the 2nd direction Dy. Accordingly, alignment of the second substrate 61 in the second direction Dy is performed. Moreover, the 2nd linear part 67 is arrange|positioned so that it may enter into the range of the width direction of the 2nd extension part 57C in the 1st direction Dx. Accordingly, alignment of the second substrate 61 in the first direction Dx is performed. Since the clearance is provided in this way, the alignment of the second substrate 61 can be easily performed.

(Second modification of the second embodiment)

16 is a plan view showing a relationship between a first alignment mark and a second alignment mark according to a second modified example of the second embodiment. In this modified example, the first extension portion 56D of the first alignment mark 55H includes a first portion 56Da and a second portion 56Db. The first portion 56Da and the second portion 56Db are arranged along the first direction Dx with the sixth slit portion SL6a interposed therebetween. The first portion 56Da is provided outside the region of the first substrate 51 that overlaps the second substrate 61 , and the second portion 56Db is provided on the region of the first substrate 51 that overlaps the second substrate 61 . The first portion 56Da is arranged at a distance from the outer edge of the second substrate 61 .

The first extension portion 56E includes a first portion 56Ea and a second portion 56Eb. The first part 56Ea and the second part 56Eb are arranged along the first direction Dx with the sixth slit part SL6b interposed therebetween. The first portion 56Ea is provided outside the region of the first substrate 51 overlapping the second substrate 61 , and the second portion 56Eb is provided on the region of the first substrate 51 overlapping the second substrate 61 . The first portion 56Ea is arranged at a distance from the outer edge of the second substrate 61 on the first direction Dx side.

The second extension portion 57C includes a first portion 57Ca and a second portion 57Cb. The first portion 57Ca and the second portion 57Cb are arranged along the second direction Dy via the seventh slit portion SL7. The first portion 57Ca is provided outside the region of the first substrate 51 that overlaps the second substrate 61 , and the second portion 57Cb is provided on the region of the first substrate 51 that overlaps the second substrate 61 . The first portion 57Ca is arranged at a distance from the outer edge of the second substrate 61 on the second direction Dy side.

In this modified example, the first linear portion 66A of the second alignment mark 65H is arranged so as to be substantially linear with the first portion 56Da of the first extension portion 56D. Moreover, the 1st linear part 66B is arrange|positioned so that it may become substantially linear with the 1st part 56Ea of the 1st extension part 56E. Accordingly, alignment of the second substrate 61 in the second direction Dy is performed. At this time, the end part of 66 A of 1st linear parts is arrange|positioned at the position facing 6th slit part SL6a. Moreover, the end part of the 1st linear part 66B is arrange|positioned at the position facing the 6th slit part SL6b. In other words, the outer edge of the second substrate 61 on the first direction Dx side is disposed at a position facing the sixth slit portions SL6a, SL6b. Accordingly, alignment of the second substrate 61 in the first direction Dx is performed.

In this way, in this modified example, the alignment of the second substrate 61 in the second direction Dy can be performed using the first linear portions 66A, 66B and the first extending portions 56D, 56E, and the first linear portion 66A can also be used to , 66B and the sixth slit portions SL6a, SL6b align the second substrate 61 in the first direction Dx.

Moreover, the 2nd linear part 67 of the 2nd alignment mark 65H is arrange|positioned so that it may become a substantially linear form with the 1st part 57Ca of 57 C of 2nd extension parts. Accordingly, alignment of the second substrate 61 in the first direction Dx can be performed. At this time, the end part of the 2nd linear part 67 is arrange|positioned facing the 7th slit part SL7. In other words, the outer edge of the second substrate 61 on the Dy side in the second direction is arranged to face the seventh slit portion SL7 .

Thereby, the alignment of the second substrate 61 in the first direction Dx can be performed by the second linear portion 67 and the second extending portion 57C, and the alignment of the second substrate 61 in the first direction Dx can be performed by the second linear portion 67 and the seventh slit portion SL7. Alignment of the second substrate 61 in the second direction Dy.

In this modified example, by providing the sixth slits SL6a, SL6b in the first extensions 56D, 56E, and providing the seventh slit SL7 in the second extension 57C, the alignment of the second substrate 61 can be accurately performed. bit.

As mentioned above, although preferred embodiment of this invention was demonstrated, this invention is not limited to such embodiment. The content disclosed in the embodiment is always an example, and various changes can be made without departing from the gist of the present invention. Appropriate changes made within the range not departing from the gist of the present invention also naturally belong to the protection scope of the present invention. At least one of various omissions, substitutions, and changes of components can be made without departing from the gist of each of the embodiments and modifications described above.

For example, in each of the above-mentioned embodiments, the connection between the first substrate 51 and the second substrate 61 has been described, but it can also be applied to the connection between the lower substrate 21 and the second substrate 61 of the display panel 10, for example. structure. In addition, the shape, size, dimension, etc. of each extension part, each linear part, and each slit part are always an example, and can be changed suitably.

Claims (13)

1. a kind of circuit substrate, it is characterised in that possess：

1st substrate, its be provided with the 1st alignment mark of the 1st extension including extending along the 1st direction and along with it is described 1st wiring of the 2nd direction extension that the 1st direction intersects；And

2nd substrate, its be provided with the 2nd alignment mark in the 1st wire portion including extending along the 1st direction and with it is described The 2nd relative wiring of 1st wiring, and a part for the 2nd substrate and the 1st substrate is arranged as opposed to,

1st extension is arranged at the outside in the region overlapping with the 2nd substrate of the 1st substrate.

2. circuit substrate according to claim 1, it is characterised in that

1st extension be arranged with the 2nd direction it is multiple,

The 1st wire portion is configured to linear with the mutual interval of the 1st extension adjacent on the 2nd direction.

3. circuit substrate according to claim 2, it is characterised in that

The width at the interval is bigger than the width in the 1st wire portion.

4. circuit substrate according to claim 1, it is characterised in that

The 1st wire portion is configured to linearly with the 1st extension.

5. circuit substrate according to claim 4, it is characterised in that

The width of 1st extension is bigger than the width in the 1st wire portion.

6. according to circuit substrate according to any one of claims 1 to 5, it is characterised in that

The outer rim of 1st extension and the 2nd substrate has compartment of terrain configuration.

7. circuit substrate according to claim 1, it is characterised in that

1st extension is arranged at the outer of the region overlapping with the 2nd substrate and the region overlapping with the 2nd substrate Side.

8. circuit substrate according to claim 1, it is characterised in that

1st extension includes the part 1 and part 2 arranged across slit portion along the 1st direction,

The outer rim of 2nd substrate is arranged as opposed to the slit portion.

9. circuit substrate according to claim 1, it is characterised in that

The end of 2nd wiring is configured at inner side compared with the outer rim of the 2nd substrate,

The end in the 1st wire portion extends to the outer rim of the 2nd substrate.

10. circuit substrate according to claim 1, it is characterised in that

1st alignment mark includes round shape portion,

2nd alignment mark includes the ring that is connected and will be wrapped at least a portion in the round shape portion with the 1st wire portion Shape portion.

11. circuit substrate according to claim 1, it is characterised in that

1st alignment mark includes the 2nd extension, and the 2nd extension extends along the 2nd direction, and is arranged at described The outside in the region overlapping with the 2nd substrate of the 1st substrate,

2nd alignment mark includes the 2nd wire portion extended along the 2nd direction.

12. circuit substrate according to claim 1, it is characterised in that

2nd substrate is with flexible and bigger than the light transmission of the 1st substrate light transmission flexible base board.

13. a kind of display device, it is characterised in that have：

Circuit substrate any one of claim 1~12；With

With the display panel of the 2nd substrate connection.