WO2011111264A1 - 回路基板、基板モジュール、および表示装置 - Google Patents
回路基板、基板モジュール、および表示装置 Download PDFInfo
- Publication number
- WO2011111264A1 WO2011111264A1 PCT/JP2010/069513 JP2010069513W WO2011111264A1 WO 2011111264 A1 WO2011111264 A1 WO 2011111264A1 JP 2010069513 W JP2010069513 W JP 2010069513W WO 2011111264 A1 WO2011111264 A1 WO 2011111264A1
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- WIPO (PCT)
- Prior art keywords
- alignment mark
- mark
- touch panel
- circuit board
- alignment
- Prior art date
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0266—Marks, test patterns or identification means
- H05K1/0269—Marks, test patterns or identification means for visual or optical inspection
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/032—Materials
- H05K2201/0326—Inorganic, non-metallic conductor, e.g. indium-tin oxide [ITO]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/0332—Structure of the conductor
- H05K2201/0335—Layered conductors or foils
- H05K2201/0338—Layered conductor, e.g. layered metal substrate, layered finish layer, layered thin film adhesion layer
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/0332—Structure of the conductor
- H05K2201/0388—Other aspects of conductors
- H05K2201/0391—Using different types of conductors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09818—Shape or layout details not covered by a single group of H05K2201/09009 - H05K2201/09809
- H05K2201/09918—Optically detected marks used for aligning tool relative to the PCB, e.g. for mounting of components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/16—Inspection; Monitoring; Aligning
- H05K2203/166—Alignment or registration; Control of registration
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/321—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by conductive adhesives
- H05K3/323—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by conductive adhesives by applying an anisotropic conductive adhesive layer over an array of pads
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/36—Assembling printed circuits with other printed circuits
- H05K3/361—Assembling flexible printed circuits with other printed circuits
Definitions
- the present invention relates to a circuit board, a board module, and a display device, and more particularly, to a circuit board, a board module, and a display device on which an alignment mark for connection with a flexible wiring board is formed.
- the FPC alignment mark is formed of the same copper foil as the FPC wiring. Since copper is a metal having a low light transmittance (hereinafter referred to as “opaque metal”), the alignment mark formed by the copper foil has high visibility.
- a first aspect of the present invention is a circuit board provided with an insulating substrate, A connection terminal for electrically connecting to the flexible wiring board formed on the insulating substrate; A first alignment mark used for alignment with the flexible wiring board, The connection terminal is formed of a transparent conductive film, The first alignment mark includes a first mark formed of an opaque conductive film.
- the first alignment mark includes only a first mark formed of an opaque conductive film.
- the first alignment mark further includes a second mark formed of a transparent conductive film, The first mark is formed on an upper surface of the second mark.
- the first alignment mark is covered with a protective film.
- connection terminal of the circuit board is formed of only a transparent conductive film.
- An eighth aspect of the present invention is a board module comprising a circuit board according to any one of the first to seventh aspects of the present invention, and a flexible wiring board electrically connected to the circuit board.
- the flexible wiring board is A flexible substrate; A second wiring formed on the flexible substrate; A second alignment mark formed in the vicinity of the second wiring, The connection terminal of the circuit board is electrically connected to the second wiring that is aligned using the first alignment mark of the circuit board and the second alignment mark of the flexible wiring board. It is characterized by being.
- the circuit board is provided with a first alignment mark used for alignment with the flexible wiring board.
- the first mark included in the first alignment mark and formed by the opaque conductive film reflects well the light used for alignment. For this reason, the visibility of the first alignment mark is enhanced, and the position of the first alignment mark is easily detected with high accuracy. If such a first alignment mark is used, the flexible wiring board and the circuit board can be aligned easily and with high accuracy, so that the circuit board and the flexible wiring board can be electrically connected without causing misalignment. Can be connected.
- FIG. (A) is a top view which shows a part of FPC contained in the liquid crystal display device which concerns on 1st Embodiment
- (b) is a figure which shows the positional relationship of the alignment mark after alignment.
- FIG. (A)-(e) is process sectional drawing which shows each manufacturing process of the touchscreen contained in the liquid crystal display device which concerns on 3rd Embodiment. It is sectional drawing which shows the structure of the board
- FIG. (A) is a top view which shows a part of touchscreen contained in the liquid crystal display device which concerns on 4th Embodiment
- (b) is a cross section of the touchscreen along arrow DD shown in (a).
- FIG. (A)-(e) is process sectional drawing which shows each manufacturing process of the touchscreen contained in the liquid crystal display device which concerns on 4th Embodiment. It is sectional drawing which shows the structure of the board
- (A) is a top view which shows a part of touchscreen contained in the liquid crystal display device which concerns on 5th Embodiment
- (b) is a cross section of the touchscreen along arrow EE shown to (a).
- FIG. 1 is a cross-sectional view showing a configuration of a liquid crystal display device 10 according to the first embodiment of the present invention.
- the liquid crystal display device 10 includes a liquid crystal panel 70, a touch panel 20 fixed to the upper surface of the liquid crystal panel 70 by an adhesive member 60, and a backlight unit 80 provided on the lower surface of the liquid crystal panel 70. Including.
- the liquid crystal panel 70 includes an active matrix substrate 71 and a counter substrate 72 that are disposed to face each other, and a liquid crystal layer 73 that is sandwiched between the substrates 71 and 72.
- the backlight unit 80 irradiates the liquid crystal panel 70 with light from the back side.
- FIG. 2 is a plan view showing a configuration of the substrate module 40 in which the FPC 50 is electrically connected to the touch panel 20 shown in FIG.
- the substrate module 40 includes a touch panel 20 and an FPC 50.
- the touch panel 20 is provided at an end portion of an insulating substrate 21 such as a glass substrate, a plurality of touch sensors 22 formed on the insulating substrate, a plurality of lead wires 23, and the insulating substrate 21, and includes a plurality of connection terminals ( And a connection region 24 formed with (not shown).
- the shape of the touch sensor 22 is a belt shape, and the plurality of touch sensors 22 are arranged in parallel to each other.
- the touch sensor 22 is connected to a plurality of connection terminals formed in the connection region 24 via lead wires 23. Since the touch panel 20 is a capacitive coupling type touch panel, the touch sensor 22 has a high resistance for improving the recognition accuracy of the touch position and has a high transmittance so as not to deteriorate the display quality of the liquid crystal panel 70. It is preferable to form with the material. For this reason, the touch sensor 22 is formed of a transparent metal oxide film having a transmittance of 80% or more, such as an ITO film or an indium zinc oxide (hereinafter referred to as “IZO”) film.
- IZO indium zinc oxide
- connection terminal of the connection region 24 is made only of an ITO film, and one end of the connection terminal is electrically connected to the lead wiring 23.
- the touch sensor 22 and the lead wiring 23 are covered with a protective film (not shown), and the connection region 24 including the connection terminals is not covered with the protective film.
- the FPC 50 includes a flexible base film, and a connection terminal (not shown) connected to a wiring made of a conductive foil having a high conductivity such as a copper foil is formed on one surface thereof. On the other surface, an electronic component 54 such as a controller that is electrically connected to the wiring through the through hole is mounted.
- the connection terminal of the FPC 50 is pressed against the connection terminal in the connection region 24 through ACF (not shown) while being heated (thermocompression bonding), and is electrically connected to the connection terminal of the touch panel 20.
- FIG. 3A is a plan view showing the alignment mark 25 and the connection area 24 of the touch panel 20, and is an enlarged view of a part of FIG. 2 (area surrounded by an elliptical dotted line).
- FIG. 3B is a cross-sectional view of the touch panel 20 along the arrow AA shown in FIG. 4A is a plan view showing a part of the wiring (connection terminal) 52 and the alignment mark 53 of the FPC 50, and FIG. 4B shows the alignment mark 25 of the touch panel 20 after alignment and the FPC 50.
- 5 is a diagram showing a positional relationship with an alignment mark 53.
- connection terminals 28 are formed in the connection region 24 of the touch panel 20 so as to be parallel to each other.
- the connection terminal 28 is connected to a lead wiring 23 formed of an opaque metal film such as aluminum.
- An alignment mark 25 is formed on the right side of the connection region 24.
- the alignment mark 25 consists only of a rectangular mark formed of an opaque metal film.
- the protective film 29 formed on the surface of the touch panel 20 covers the alignment mark 25 and the lead wiring 23 and does not cover the connection terminal 28.
- 3A and 3B show only a part of the touch panel 20, and are not shown in FIGS. 3A and 3B, but are on the left side of the connection region 24.
- an alignment mark 25 is formed.
- the FPC 50 is disposed above the touch panel 20.
- the FPC 50 has a frame-shaped alignment mark 53 formed by removing the central opaque metal film into a rectangular shape. Accordingly, as shown in FIG. 4B, the touch panel 20 and the FPC 50 can be aligned by moving the FPC 50 so that the alignment mark 25 of the touch panel 20 is within the frame of the alignment mark 53 of the FPC 50. it can.
- the shape of the alignment marks 25 and 53 shown in FIG.4 (b) is an example, and another shape may be sufficient as it.
- an ITO film 32 is formed as a transparent metal oxide film so as to cover the entire insulating substrate 21.
- the ITO film 32 is patterned by a photolithography method to form a touch sensor (not shown) and connection terminals 28.
- a touch sensor not shown
- connection terminals 28 connection terminals
- connection region where the connection terminals 28 are formed is covered with a metal mask, and a protective film 29 is formed by sputtering or CVD (Chemical Vapor Deposition).
- the protective film 29 is formed so as to cover the entire insulating substrate 21 except for the connection terminals 28.
- the protective film 29 is made of, for example, any one of a silicon oxide film, a silicon nitride film, an organic film, or a laminated film thereof.
- the alignment mark 25 of the touch panel 20 is formed of the same opaque metal film as that of the lead wiring, and the connection terminal 28 is formed of a transparent metal oxide film. Further, the alignment make 25 is covered with a protective film 29 together with the lead wiring, the touch sensor, and the like. In this case, the touch panel 20 is formed by the same manufacturing process as that of the related art only by adding the pattern of the alignment mark 25 to the photomask used when the aluminum film 31 is patterned.
- the FPC 50 is disposed above the touch panel 20, and the mark recognition camera 55 is disposed below the touch panel 20.
- the position of the FPC 50 is adjusted by moving the FPC 50 back and forth, left and right within the plane, or rotating it so that the alignment mark 25 of the touch panel 20 fits within the frame of the alignment mark 53 of the FPC 50 (see FIG. 4B).
- the two alignment marks 25 and 53 used for this alignment are both made of an opaque metal.
- the mark recognition camera 55 can easily recognize the alignment marks 25 and 53, so that the alignment can be performed easily and with high accuracy.
- the alignment mark 25 of the touch panel 20 is composed only of a mark formed of an opaque metal film having a high reflectance, and thus reflects light used at the time of alignment well. Since the alignment is performed using this reflected light, the visibility of the alignment mark 25 is enhanced, and the position of the alignment mark 25 is easily detected with high accuracy. As described above, if the alignment mark 25 is used, alignment can be performed easily and with high accuracy, so that the touch panel 20 and the FPC 50 can be electrically connected without causing a positional shift. Thereby, the yield of the substrate module 40 can be improved. Moreover, since the visibility of the alignment mark 25 of the touch panel 20 is high, it is not necessary to modify the alignment device. Therefore, it can suppress that the manufacturing cost of the board module 40 becomes high.
- connection terminal 28 of the touch panel 20 is formed only by the ITO film, it is not easily corroded. For this reason, the reliability of the connection part of the touch panel 20 and FPC50 is securable. Furthermore, since the alignment mark 25 is formed by only partially changing the pattern of the photomask used for patterning, it is necessary to add a new manufacturing process or change the conventional manufacturing process. Absent.
- Second to sixth embodiments> The configuration of the liquid crystal display devices according to the second to sixth embodiments described below is the same as the configuration of the liquid crystal display device 10 shown in FIG.
- the configuration of the substrate module including the touch panel is the same as the configuration of the substrate module 40 shown in FIG. Therefore, in the following embodiments, drawings and descriptions of the liquid crystal display device and the substrate module are omitted.
- Each embodiment will be described with reference to an enlarged plan view and a cross-sectional view of a portion corresponding to a part of the touch panel 20 shown in FIG. 2 (a region surrounded by an elliptical dotted line).
- FIG. 7A is an enlarged plan view of a part of the touch panel 120 included in the liquid crystal display device according to the second embodiment
- FIG. 7B is an arrow B shown in FIG. It is sectional drawing of the touch panel 120 along -B.
- the description will focus on components that are different from the components of the touch panel 20 shown in FIGS. 3A and 3B.
- the same reference numerals are assigned to the constituent elements, and the description thereof is omitted.
- the ITO film 32 is patterned by photolithography to form a touch sensor (not shown) and the connection terminal 28, and the same shape as the mark 125a is formed on the upper surface of the mark 125a.
- the mark 125b is formed of an ITO film.
- an alignment mark 125 having a stacked structure in which the mark 125b is stacked on the upper surface of the mark 125a is formed.
- the manufacturing process shown in FIG. 8E is the same as the manufacturing process shown in FIG. In this case, the alignment mark 125 is formed by the same manufacturing process as that of the related art only by adding the pattern of the alignment mark 125 to each photomask used for patterning the aluminum film 31 and the ITO film 32.
- FIG. 10A is an enlarged plan view of a part of the touch panel 220 included in the liquid crystal display device according to the third embodiment
- FIG. 10B is an arrow C shown in FIG. 6 is a cross-sectional view of the touch panel 220 along ⁇ C.
- FIG. of the components of the touch panel 220 shown in FIGS. 10A and 10B components different from the components of the touch panel 120 shown in FIGS. 7A and 7B will be mainly described and the same. The same reference numerals are assigned to the constituent elements, and the description thereof is omitted.
- FIG. 11A to FIG. 11E are process cross-sectional views showing each manufacturing process of the touch panel 220.
- the steps different from those shown in FIGS. 5 (a) to 5 (e) will be mainly described, and the same manufacturing steps are the same. Reference numerals are assigned and description thereof is omitted.
- FIG. 12 is a cross-sectional view illustrating a configuration of a substrate module 240 in which the FPC 50 is thermocompression bonded to the touch panel 220.
- the connection terminal 52 of the FPC 50 is connected to the connection terminal 28 of the touch panel 220 via the ACF 30.
- the alignment mark 53 of the FPC 50 is aligned so as to surround the alignment mark 225 of the touch panel 220.
- touch panel 420 and the board module 440 have the same effects as the touch panel 20 and the board module 40 of the first embodiment, description thereof is omitted.
- the problem of the corrosion of the opaque metal film due to the alignment mark 425 not being covered with the protective film 29 is the same as in the case of the touch panel 320 shown in FIGS. Is omitted.
- the alignment mark 525 of the touch panel 520 includes a rectangular mark 525b made of a transparent metal oxide film, and an opaque metal film on the upper surface of the mark 525b. Is a mark having a laminated structure in which rectangular marks 525a made of Thus, since the alignment mark 525 includes the rectangular mark 525a formed of an opaque metal film, the alignment mark 525 is highly visible during alignment. However, unlike the alignment mark 225, the alignment mark 525 is not covered with the protective film 29.
- FIGS. 20 (a) to 20 (e) are process cross-sectional views showing each manufacturing process of the touch panel 520.
- FIG. The manufacturing steps shown in FIGS. 20 (a) to 20 (d) are the same as the manufacturing steps shown in FIGS. 11 (a) to 11 (d), and a description thereof will be omitted.
- a protective film 29 is formed by CVD or sputtering.
- FIG. 20E not only the connection terminal 28 but also the alignment mark 525 is not covered by the protective film 29.
- an alignment mark 525 having the same laminated structure as that of the alignment mark 225 and having a surface not covered with the protective film 29 is formed.
- the alignment mark 525 is formed by the same manufacturing process as that of the prior art only by adding the pattern of the alignment mark 525 to each photomask used when patterning the aluminum film 31 and the ITO film 32.
- the manufacturing method of the substrate module 540 is the same as the manufacturing method of the substrate module 40 shown in FIG.
- FIG. 21 is a cross-sectional view showing a configuration of a substrate module 540 in which the FPC 50 is thermocompression bonded to the touch panel 520 by such a manufacturing method.
- the connection terminal 52 of the FPC 50 is connected to the connection terminal 28 of the touch panel 520 via the ACF 30. Further, the alignment mark 53 of the FPC 50 is aligned so as to surround the alignment mark 525 of the touch panel 520.
- the touch panel is described as a capacitive touch panel, but may be a resistive film type, an infrared type, an ultrasonic type, and an electromagnetic inductive coupling type touch panel.
- the insulating substrate 21 of the touch panel may also be used as the counter substrate 72 of the liquid crystal panel 70.
- the touch sensor is formed on the other surface facing one surface of the counter electrode 72 in contact with the liquid crystal layer 73.
- the FPC 50 is electrically connected to the connection region 24 of the touch panel to which the ACF 30 is attached as the anisotropic conductive adhesive member.
- an anisotropic conductive adhesive paste (Anisotropic ⁇ Conductive Paste) may be applied to the connection region 24 of the touch panel instead of the ACF 30.
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Abstract
Description
前記絶縁基板上に形成された、フレキシブル配線基板と電気的に接続するための接続端子と、
前記フレキシブル配線基板との位置合わせに使用される第1のアライメントマークとを備え、
前記接続端子は、透明導電膜によって形成され、
前記第1のアライメントマークは、不透明導電膜によって形成された第1のマークを含むことを特徴とする。
前記第1のアライメントマークは、不透明導電膜によって形成された第1のマークのみからなることを特徴とする。
前記第1のアライメントマークは、透明導電膜によって形成された第2のマークをさらに含み、
前記第2のマークは、前記第1のマークの上面に形成されていることを特徴とする。
前記第1のアライメントマークは、透明導電膜によって形成された第2のマークをさらに含み、
前記第1のマークは、前記第2のマークの上面に形成されていることを特徴とする。
前記接続端子と電気的に接続され、前記不透明導電膜によって形成された第1の配線をさらに含み、
前記第1のマークは、前記第1の配線と同じ材質の不透明導電膜によって形成されていることを特徴とする。
前記第1のアライメントマークは保護膜によって覆われていることを特徴とする。
前記回路基板の前記接続端子は、透明導電膜のみによって形成されていることを特徴とする。
前記フレキシブル配線基板は、
可撓性基板と、
前記可撓性基板上に形成された第2の配線と、
前記第2の配線の近傍に形成された第2のアライメントマークとを含み、
前記回路基板の接続端子は、前記回路基板の第1のアライメントマークと、前記フレキシブル配線基板の前記第2のアライメントマークとを用いて位置合わせされた前記第2の配線と電気的に接続されていることを特徴とする。
前記回路基板は、透明導電膜によって形成され、タッチ位置を検出するタッチセンサをさらに備えたタッチパネルであり、
前記表示パネルは、前記タッチパネルと対向して配置されていることを特徴とする。
<1.1 液晶表示装置の構成>
図1は、本発明の第1の実施形態に係る液晶表示装置10の構成を示す断面図である。図1に示すように、液晶表示装置10は、液晶パネル70と、接着部材60によって液晶パネル70の上面に固定されたタッチパネル20と、液晶パネル70の下面に設けられたバックライトユニット80とを含む。
図5(a)~図5(e)は、タッチパネル20の各製造工程を示す工程断面図である。図5(a)に示すように、ガラス基板等の絶縁基板21上に、スパッタリング法によって、不透明金属膜として例えばアルミニウム膜31を形成する。次に、図5(b)に示すように、フォトリソグラフィ法によってアルミニウム膜31をパターニングして、引出配線(図示しない)とアライメントマーク25を形成する。このように、引出配線とアライメントマーク25とを同時に形成することで、製造工程を簡略化することができる。
図6(a)~図6(d)は、タッチパネル20とFPC50の接続工程を示す工程断面図である。図6(a)に示すように、上述の製造方法によって製造したタッチパネル20を準備する。次に、図6(b)に示すように、接続端子28だけでなく、さらにアライメントマーク25も完全に覆うように、矩形状のACF30をタッチパネル20に貼り付ける。
以上説明したように、タッチパネル20のアライメントマーク25は、反射率が高い不透明金属膜によって形成されたマークのみからなるので、位置合わせ時に使用される光をよく反射する。位置合わせはこの反射光を用いて行なわれるので、アライメントマーク25の視認性が高くなり、アライメントマーク25の位置が容易にかつ高い精度で検出される。このように、アライメントマーク25を用いれば、容易にかつ高い精度で位置合わせすることができるので、タッチパネル20とFPC50とを位置ずれをおこすことなく電気的に接続することができる。これにより、基板モジュール40の歩留りを向上させることができる。また、タッチパネル20のアライメントマーク25の視認性が高いので、アライメント装置を改造する必要もない。したがって、基板モジュール40の製造コストが高くなることを抑制することができる。
以下に説明する第2~第6の実施形態に係る液晶表示装置の構成は、図1に示す液晶表示装置10の構成と同じである。また、タッチパネルを含む基板モジュールの構成は、図2に示す基板モジュール40の構成と同じである。したがって、以下の各実施形態では、液晶表示装置および基板モジュールの図面とその説明を省略する。そして、実施形態ごとに、図2に示すタッチパネル20の一部(楕円形の点線で囲まれた領域)と対応する部分を拡大した平面図およびその断面図に基づいて説明する。
図7(a)は、第2の実施形態に係る液晶表示装置に含まれるタッチパネル120の一部を拡大した平面図であり、図7(b)は、図7(a)に示す矢線B-Bに沿ったタッチパネル120の断面図である。図7(a)および図7(b)に示すタッチパネル120の構成要素のうち、図3(a)および図3(b)に示すタッチパネル20の構成要素と異なる構成要素を中心に説明し、同一の構成要素については同一の参照符号を付して、その説明を省略する。
図10(a)は、第3の実施形態に係る液晶表示装置に含まれるタッチパネル220の一部を拡大した平面図であり、図10(b)は、図10(a)に示す矢線C-Cに沿ったタッチパネル220の断面図である。図10(a)および図10(b)に示すタッチパネル220の構成要素のうち、図7(a)および図7(b)に示すタッチパネル120の構成要素と異なる構成要素を中心に説明し、同一の構成要素については同一の参照符号を付して、その説明を省略する。
図13(a)は、第4の実施形態に係る液晶表示装置に含まれるタッチパネル320の一部を拡大した平面図であり、図13(b)は、図13(a)に示す矢線D-Dに沿ったタッチパネル320の断面図である。図13(a)および図13(b)に示すタッチパネル320の構成要素のうち、図3(a)および図3(b)に示すタッチパネル20の構成要素と異なる構成要素を中心に説明し、同一の構成要素については同一の参照符号を付して、その説明を省略する。
図16(a)は、第5の実施形態に係る液晶表示装置に含まれるタッチパネル420の一部を拡大した平面図であり、図16(b)は、図16(a)に示す矢線E-Eに沿ったタッチパネル420の断面図である。図16(a)および図16(b)に示すタッチパネル420の構成要素のうち、図7(a)および図7(b)に示すタッチパネル120の構成要素と異なる構成要素を中心に説明し、同一の構成要素については同一の参照符号を付して、その説明を省略する。
図19(a)は、第6の実施形態に係る液晶表示装置に含まれるタッチパネル520の一部を拡大した平面図であり、図19(b)は、図19(a)に示す矢線F-Fに沿ったタッチパネル520の断面図である。図19(a)および図19(b)に示すタッチパネル520の構成要素のうち、図10(a)および図10(b)に示すタッチパネル220の構成要素と異なる構成要素を中心に説明し、同一の構成要素については同一の参照符号を付して、その説明を省略する。
上記各実施形態では、タッチパネルは、静電容量方式のタッチパネルであるとして説明したが、抵抗膜方式、赤外線方式、超音波方式、および電磁誘導結合方式のタッチパネルであってもよい。また、タッチパネルの絶縁基板21は、液晶パネル70の対向基板72と兼用してもよい。この場合、タッチセンサは、対向電極72の液晶層73と接する一方の面と対向する他方の面上に形成される。
20、120、220、320、420、520…タッチパネル
21…ガラス基板(絶縁基板)
23…タッチパネルの引出配線
24…接続領域
25、125、225、325,425、525…タッチパネルのアライメントマーク
125a、225a、425a、525a…不透明金属膜で形成された第1のマーク
125b、225b、425b、525b…透明金属酸化物膜で形成された第2のマーク
28…タッチパネルの接続端子
29…保護膜
30…ACF(異方性導電接着シート)
40、140、240、340、440、540…基板モジュール
50…FPC(フレキシブル配線基板)
52…FPCの配線および接続端子
53…FPCのアライメントマーク
Claims (9)
- 絶縁基板を備えた回路基板であって、
前記絶縁基板上に形成された、フレキシブル配線基板と電気的に接続するための接続端子と、
前記フレキシブル配線基板との位置合わせに使用される第1のアライメントマークとを備え、
前記接続端子は、透明導電膜によって形成され、
前記第1のアライメントマークは、不透明導電膜によって形成された第1のマークを含むことを特徴とする、回路基板。 - 前記第1のアライメントマークは、不透明導電膜によって形成された第1のマークのみからなることを特徴とする、請求項1に記載の回路基板。
- 前記第1のアライメントマークは、透明導電膜によって形成された第2のマークをさらに含み、
前記第2のマークは、前記第1のマークの上面に形成されていることを特徴とする、請求項1に記載の回路基板。 - 前記第1のアライメントマークは、透明導電膜によって形成された第2のマークをさらに含み、
前記第1のマークは、前記第2のマークの上面に形成されていることを特徴とする、請求項1に記載の回路基板。 - 前記接続端子と電気的に接続され、前記不透明導電膜によって形成された第1の配線をさらに含み、
前記第1のマークは、前記第1の配線と同じ材質の不透明導電膜によって形成されていることを特徴とする、請求項1に記載の回路基板。 - 前記第1のアライメントマークは保護膜によって覆われていることを特徴とする、請求項1に記載の回路基板。
- 前記回路基板の前記接続端子は、透明導電膜のみによって形成されていることを特徴とする、請求項1に記載の回路基板。
- 請求項1から請求項7のいずれか1項に記載の回路基板と、前記回路基板と電気的に接続されるフレキシブル配線基板とを備えた基板モジュールであって、
前記フレキシブル配線基板は、
可撓性基板と、
前記可撓性基板上に形成された第2の配線と、
前記第2の配線の近傍に形成された第2のアライメントマークとを含み、
前記回路基板の接続端子は、前記回路基板の第1のアライメントマークと、前記フレキシブル配線基板の前記第2のアライメントマークとを用いて位置合わせされた前記第2の配線と電気的に接続されていることを特徴とする、基板モジュール。 - 請求項1から請求項7のいずれか1項に記載の回路基板と、画像を表示する表示パネルとを備えた表示装置であって、
前記回路基板は、透明導電膜によって形成され、タッチ位置を検出するタッチセンサをさらに備えたタッチパネルであり、
前記表示パネルは、前記タッチパネルと対向して配置されていることを特徴とする、表示装置。
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