JP5633164B2 - Solder connection structure and display device having the same - Google Patents

Solder connection structure and display device having the same Download PDF

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JP5633164B2
JP5633164B2 JP2010064188A JP2010064188A JP5633164B2 JP 5633164 B2 JP5633164 B2 JP 5633164B2 JP 2010064188 A JP2010064188 A JP 2010064188A JP 2010064188 A JP2010064188 A JP 2010064188A JP 5633164 B2 JP5633164 B2 JP 5633164B2
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wiring
conductive film
wiring board
sub
solder
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JP2011146664A5 (en
JP2011146664A (en
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克彦 遊佐
克彦 遊佐
貴文 大橋
貴文 大橋
成仁 柳井
成仁 柳井
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Casio Computer Co Ltd
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Description

この発明は、2つの配線基板上の導電膜を互いに半田で接合する半田接続構造と、その半田接続構造を備えた表示装置に関する。   The present invention relates to a solder connection structure in which conductive films on two wiring boards are joined together by solder, and a display device including the solder connection structure.

液晶表示素子と、この液晶表示素子を照明する面光源とを備えた液晶表示装置は、液晶表示素子に複数の信号、複数の電源、前記面光源を制御するための信号等を供給するための複数の配線が設けられた主配線基板と、前記面光源の発光素子に電流を供給するための複数の配線が形成された副配線基板とを備え、これらの配線基板を前記面光源の裏側で互いに接続し、前記主配線基板から供給される信号等によって前記液晶表示素子と面光源が駆動されること(特許文献1参照)が知られている。   A liquid crystal display device including a liquid crystal display element and a surface light source that illuminates the liquid crystal display element is used to supply a plurality of signals, a plurality of power supplies, a signal for controlling the surface light source, and the like to the liquid crystal display element. A main wiring board provided with a plurality of wirings, and a sub wiring board on which a plurality of wirings for supplying current to the light emitting elements of the surface light source are formed, and these wiring boards are arranged behind the surface light source. It is known that the liquid crystal display element and the surface light source are driven by a signal or the like connected to each other and supplied from the main wiring board (see Patent Document 1).

そして、上述した液晶表示装置のような主配線基板に副配線基板を接続する方法の1つとしては、主配線基板と副配線基板の配線が形成されたそれぞれの面を一方の方向に向けた状態で、前記主配線基板の配線上に前記副配線基板の配線の先端を配置させ、両配線の導電体を半田で接続する構造が知られている。   As one method for connecting the sub wiring board to the main wiring board such as the liquid crystal display device described above, the respective surfaces on which the wirings of the main wiring board and the sub wiring board are formed are directed in one direction. In this state, a structure is known in which the tip of the wiring of the sub wiring board is arranged on the wiring of the main wiring board and the conductors of both wirings are connected by solder.

特開2008−84790号公報JP 2008-84790 A

しかし、上述した半田接合方法においては、前記主配線基板と副配線基板のそれぞれの配線の接合部における半田の盛り量に応じて、半田付け強度の違いが大きく、半田付け強度にバラツキが大きいという問題があった。
この発明は、半田付けの良否を目視により確認可能な半田接続構造、及びこの半田接続構造を備えた表示装置を提供することを目的としたものである。
However, in the above-described solder bonding method, there is a large difference in soldering strength depending on the amount of solder at each wiring junction of the main wiring board and the sub wiring board, and the soldering strength varies greatly. There was a problem.
An object of the present invention is to provide a solder connection structure capable of visually confirming whether soldering is good or not, and a display device including the solder connection structure.

この発明の請求項1に記載の半田接続構造は、予め定めた幅を有する導電膜からなる第1の配線が形成された主配線基板上に、予め定めた幅を有する導電膜からなる第2の配線が形成された副配線基板が、前記第1の配線に前記第2の配線を対応させて配置され、前記第1の配線と前記第2の配線を半田により接続する半田接続構造において、前記第1の配線と前記第2の配線が前記半田により接続される部分の、前記第1の配線と前記第2の配線の一方に、該一方の配線の幅を隣接する部分よりも狭くした狭幅部と、前記第2の配線が形成された前記副配線基板は、前記主配線基板と接する前記副配線基板の先端端面に、前記第1の配線及び前記第2の配線と電気的に接続され、前記狭幅部よりも幅が広い端面導電膜と、を備えることを特徴とする。 According to a first aspect of the present invention, there is provided a solder connection structure comprising: a second conductive film having a predetermined width on a main wiring board on which a first wiring made of a conductive film having a predetermined width is formed; In the solder connection structure in which the sub-wiring substrate on which the wiring is formed is disposed so that the second wiring corresponds to the first wiring, and the first wiring and the second wiring are connected by solder, The width of one of the first wiring and the second wiring of the portion where the first wiring and the second wiring are connected by the solder is narrower than the adjacent portion. The sub-wiring substrate on which the narrow portion and the second wiring are formed is electrically connected to the first wiring and the second wiring on the tip end surface of the sub-wiring substrate in contact with the main wiring substrate. It is connected, especially in that it comprises a wide end face conductive film than the narrow portion To.

請求項に記載の発明は、請求項1に記載の半田接続構造において、前記狭幅部は、前記副配線基板の端に対応する前記第2の配線の部分に形成されたくびれ形状からなることを特徴とする。 According to a second aspect of the invention, the solder connection structure according to claim 1, wherein the narrow portion is formed of the second portion formed constricted shape of the wiring corresponding to the end of the sub-wiring board It is characterized by that.

請求項に記載の発明は、請求項1に記載の半田接続構造において、前記主配線基板の前記副配線基板に接する部分の前記第1の配線に形成されたくびれ形状からなることを特徴とする。 According to a third aspect of the present invention, in the solder connection structure according to the first aspect, the solder connection structure has a constricted shape formed in the first wiring at a portion of the main wiring board that is in contact with the sub wiring board. To do.

この発明の請求項に記載の表示装置は、表示素子と、前記表示素子を照明する面光源と、前記表示素子を駆動するための信号及び電圧を供給する第1の配線が形成された主配線基板と、前記面光源を駆動するための電流を供給する第2の配線が形成された副配線基板とを有し、請求項1乃至請求項のいずれかに記載の半田接続構造を備えることを特徴とする。

According to a fourth aspect of the present invention, there is provided a display device comprising: a display element; a surface light source that illuminates the display element; and a first wiring that supplies a signal and a voltage for driving the display element. comprising a wiring board, and a sub-wiring board in which the second wiring is formed for supplying a current for driving the surface light source, a solder connection structure according to any one of claims 1 to 3 It is characterized by that.

この発明の半田接続構造と、その半田接続構造を備えた表示装置によれば、配線基板における半田付けの良否を目視で確認することができる。   According to the solder connection structure of the present invention and the display device provided with the solder connection structure, it is possible to visually confirm the quality of soldering on the wiring board.

この発明の第1の実施形態にかかる半田接続構造を備えた表示装置の平面図。1 is a plan view of a display device including a solder connection structure according to a first embodiment of the present invention. 図1に示した表示装置の背面図。The rear view of the display apparatus shown in FIG. 図1及び図2に示した表示装置を図2のIII−III線で切断して示す断面図。FIG. 3 is a cross-sectional view of the display device shown in FIGS. 1 and 2 cut along line III-III in FIG. 2. 第1の実施形態にかかる半田接続構造を拡大して示し、図4Aは拡大背面図、図4Bは図4AのIV−IV線で切断して示す拡大断面図。FIG. 4A is an enlarged rear view, and FIG. 4B is an enlarged cross-sectional view taken along line IV-IV in FIG. 4A, showing the solder connection structure according to the first embodiment in an enlarged manner. 第1の実施形態にかかる半田接続構造を構成する部材を拡大して示し、図5A、図5Bはそれぞれ副、及び主配線基板の拡大図。The members constituting the solder connection structure according to the first embodiment are shown enlarged, and FIGS. 5A and 5B are enlarged views of the sub and main wiring boards, respectively. この発明の第2の実施形態にかかる半田接続構造を構成する各部材と接続構造を示し、図6A、図6Bはそれぞれ副、及び主配線基板の拡大図、図6Cは、半田接続構造を示す拡大図。FIG. 6A and FIG. 6B are enlarged views of the sub and main wiring boards, respectively, and FIG. 6C shows the solder connection structure. Enlarged view. この発明の第3の実施形態にかかる半田接続構造を構成する各部材と接続構造を示し、図7Aは主配線基板を示す拡大図、図7Bは配線基板の半田接続構造を示す拡大図。FIG. 7A is an enlarged view showing a main wiring board, and FIG. 7B is an enlarged view showing a solder connection structure of a wiring board, showing each member constituting the solder connection structure according to a third embodiment of the present invention and the connection structure. この発明の第4の実施形態にかかる半田接続構造を分解して示す分解斜視図。The disassembled perspective view which decomposes | disassembles and shows the solder connection structure concerning 4th Embodiment of this invention. 第4の実施形態にかかる半田接続構造を拡大して示す拡大図。The enlarged view which expands and shows the solder connection structure concerning 4th Embodiment. 図9のX−X線で切断して示す拡大断面図。FIG. 10 is an enlarged cross-sectional view taken along line XX in FIG. 9. この発明の第5の実施形態にかかる半田接続構造を構成する各部材と接続構造を示し、図11Aは副主配線基板の拡大図、図11Bは半田接続構造を示す拡大図。FIG. 11A is an enlarged view of a sub-main wiring board, and FIG. 11B is an enlarged view showing a solder connection structure, showing members and connection structures constituting a solder connection structure according to a fifth embodiment of the present invention. この発明の第6の実施形態にかかる半田接続構造を構成する各部材と接続構造を示し、図12Aは副配線基板の拡大図、図12Bは半田接続構造を示す拡大図。FIG. 12A is an enlarged view of a sub-wiring board, and FIG. 12B is an enlarged view showing a solder connection structure, showing members and connection structures constituting a solder connection structure according to a sixth embodiment of the present invention. この発明の第7の実施形態にかかる半田接続構造を構成する各部材と接続構造を示し、図13Aは副配線基板の拡大図、図13Bは、半田接続構造を示す拡大図。FIG. 13A is an enlarged view of a sub-wiring board, and FIG. 13B is an enlarged view showing a solder connection structure, showing members and connection structures constituting a solder connection structure according to a seventh embodiment of the present invention. この発明の第8の実施形態にかかる半田接続構造を構成する各部材と接続構造を示し、図14Aは副配線基板の拡大図、図14Bは半田接続構造を示す拡大図。FIG. 14A is an enlarged view of a sub-wiring board, and FIG. 14B is an enlarged view showing a solder connection structure, showing members and connection structures constituting a solder connection structure according to an eighth embodiment of the present invention. この発明の第9の実施形態にかかる半田接続構造を構成する各部材と接続構造を示し、図15Aは副配線基板の拡大図、図15Bは半田接続構造を示す拡大図。FIG. 15A is an enlarged view of a sub-wiring board, and FIG. 15B is an enlarged view showing a solder connection structure, showing members and connection structures constituting a solder connection structure according to a ninth embodiment of the present invention. この発明の第10の実施形態にかかる半田接続構造を示し、図16Aは半田接続構造を拡大して示す拡大図、図16Bは図16AのXVI−XVI線で切断して示す拡大断面図。The solder connection structure concerning 10th Embodiment of this invention is shown, FIG. 16A is an enlarged view which expands and shows a solder connection structure, FIG. 16B is an expanded sectional view cut | disconnected and shown by the XVI-XVI line of FIG. この発明の第10の実施形態にかかる半田接続構造を構成する部材を展開して示す拡大図。The expanded view which expands and shows the member which comprises the solder connection structure concerning 10th Embodiment of this invention. この発明の第1の実施形態に対する比較例としての半田接続構造を示す拡大図。The enlarged view which shows the solder connection structure as a comparative example with respect to 1st Embodiment of this invention.

(第1実施形態)
図1乃至図5は、この発明の第1の実施形態を示しており、図1は半田接続構造を備えた表示装置の平面図、図2は前記表示装置の背面図、図3は前記表示装置を図2のIII−III線で切断して示す断面図、図4Aは第1の実施形態にかかる半田接続構造を拡大して示す拡大背面図、図4Bは図4AのIV−IV線で切断して示す拡大断面図、図5A、図5Bは互いに接続される副、及び主配線基板それぞれの拡大図である。
(First embodiment)
1 to 5 show a first embodiment of the present invention. FIG. 1 is a plan view of a display device having a solder connection structure, FIG. 2 is a rear view of the display device, and FIG. FIG. 4A is an enlarged rear view showing the solder connection structure according to the first embodiment, and FIG. 4B is an IV-IV line in FIG. 4A. FIG. 5A and FIG. 5B are enlarged views of the sub and main wiring boards connected to each other.

この発明の半田接続構造を備えた表示装置は、図1乃至図3に示すように、液晶表示素子からなる表示素子1と、この表示素子1の裏面に配置された面光源2と、これらの表示素子1と面光源2を収納する下ケース3と、前記表示素子1の表示領域に対応する窓部4aを有し前記表示素子1の周囲を押える上ケース4とを備えている。   As shown in FIGS. 1 to 3, the display device having the solder connection structure of the present invention includes a display element 1 composed of a liquid crystal display element, a surface light source 2 disposed on the back surface of the display element 1, and these A lower case 3 that houses the display element 1 and the surface light source 2, and an upper case 4 that has a window portion 4 a corresponding to the display area of the display element 1 and presses the periphery of the display element 1.

前記表示素子1には、その一方の基板を延長させた延出部1aが設けられ、この延出部1aには前記表示素子1を駆動するための信号を生成する集積回路5と、この集積回路5の出力を表示領域の図示しない画素に供給するための図示しない配線が設けられている。前記延出部1aの端には、前記集積回路5に前記表示素子1を駆動する信号を生成するための複数の信号、複数の電源等を供給するための複数の端子が配置された端子配列部1bが形成されている。   The display element 1 is provided with an extension portion 1a obtained by extending one of the substrates. The extension portion 1a includes an integrated circuit 5 that generates a signal for driving the display element 1 and the integrated circuit 5. A wiring (not shown) for supplying the output of the circuit 5 to a pixel (not shown) in the display area is provided. A terminal array in which a plurality of terminals for supplying a plurality of signals for generating a signal for driving the display element 1 to the integrated circuit 5 and a plurality of power supplies are arranged at the end of the extending portion 1a. Part 1b is formed.

前記端子配列部1bには、複数の配線が設けられた主配線基板6が接続されている。この主配線基板6は、前記表示素子1を観察する側とは反対側の面6a(以下、パターン形成面という)に、前記複数の信号、複数の電源等を供給するための導電膜からなる複数の配線が形成され、一方端の接続部6bが前記端子配列部1bに接続され、他端には外部機器に接続するための複数の接続端子6cが配列された端子群6dが設けられている。   A main wiring board 6 provided with a plurality of wirings is connected to the terminal array portion 1b. The main wiring board 6 is made of a conductive film for supplying the plurality of signals, a plurality of power supplies, and the like to a surface 6a (hereinafter referred to as a pattern formation surface) opposite to the side on which the display element 1 is observed. A plurality of wirings are formed, one end connection portion 6b is connected to the terminal arrangement portion 1b, and the other end is provided with a terminal group 6d in which a plurality of connection terminals 6c for connection to an external device are arranged. Yes.

この主配線基板6は、図4Bに示すように、絶縁性のフィルム61と、この絶縁性のフィルム61の、少なくとも前記パターン形成面61a側に形成された各配線に対応する導電パターン62と、前記一方端の接続部6b、及び他方の端の端子群6dを除いて、これらの導電パターン62を覆う保護膜63とを有するフレキシブル配線基板からなっている。そして、前記主配線基板6のパターン形成面6aには、面光源に電流を供給するための複数の光源駆動配線62aが設けられ、またこれらの光源駆動配線62aを覆う前記保護膜63の一部が除去されて前記光源駆動配線62aが露出する配線接続部6eが設けられ、この露出した光源駆動配線62aに後述する副配線基板8が半田接続される。   As shown in FIG. 4B, the main wiring board 6 includes an insulating film 61, and a conductive pattern 62 corresponding to each wiring formed on at least the pattern forming surface 61a side of the insulating film 61. Except for the connecting portion 6b at one end and the terminal group 6d at the other end, it is made of a flexible wiring board having a protective film 63 covering these conductive patterns 62. The pattern forming surface 6a of the main wiring board 6 is provided with a plurality of light source driving wires 62a for supplying current to the surface light source, and a part of the protective film 63 covering these light source driving wires 62a. Is removed to expose the light source drive wiring 62a, and a sub-wiring board 8 described later is soldered to the exposed light source drive wiring 62a.

前記面光源2には、その端面にLED等からなる複数の発光素子7が配列され、これらの発光素子7は、これらの発光素子7に電流を供給するための複数の配線が形成された副配線基板8上に設置されている。この副配線基板8は、絶縁性のフィルム81と、この絶縁性のフィルム81の上に配列された複数の導電パターン82と、これらの導電パターン82を覆う保護膜83からなっており、一方の端に所定の間隔で前記複数の発光素子7が配列され、他方端に前記主配線基板6に形成された光源駆動配線62aと接続するための端子部8aが形成され、一方端の複数の発光素子7と他方端の端子部8aに配列された複数の端子82aとの間が複数の配線によって接続されている。   The surface light source 2 has a plurality of light emitting elements 7 made of LEDs or the like arranged on its end face, and these light emitting elements 7 are sub-types in which a plurality of wirings for supplying current to these light emitting elements 7 are formed. It is installed on the wiring board 8. The sub-wiring substrate 8 includes an insulating film 81, a plurality of conductive patterns 82 arranged on the insulating film 81, and a protective film 83 covering these conductive patterns 82. The plurality of light emitting elements 7 are arranged at predetermined intervals at the end, and the terminal portion 8a for connecting to the light source driving wiring 62a formed on the main wiring board 6 is formed at the other end, and the plurality of light emission at one end is formed. The element 7 and a plurality of terminals 82a arranged in the terminal portion 8a at the other end are connected by a plurality of wirings.

図4、図5に示すように、前記主配線基板6と前記副配線基板8とを接続する半田接続構造は、前記主配線基板6の前記配線接続部6eに、前記副配線基板8の端子部8aを、それぞれの導電膜を同じ側(表示素子の観察側は反対側)に向け、且つ前記複数の端子82aと前記複数の光源駆動配線62aとがそれぞれ対応するように配置し、各端子82aと各光源駆動配線62aとの間に半田9が盛られ、それぞれの導電膜が電気的に接続される。   As shown in FIGS. 4 and 5, the solder connection structure for connecting the main wiring board 6 and the sub wiring board 8 has a terminal of the sub wiring board 8 connected to the wiring connecting portion 6 e of the main wiring board 6. The portions 8a are arranged so that the respective conductive films face the same side (the side opposite to the viewing side of the display element), and the plurality of terminals 82a and the plurality of light source drive wirings 62a correspond to each other. Solder 9 is deposited between 82a and each light source drive wiring 62a, and the respective conductive films are electrically connected.

すなわち、図5Bに示すように、前記配線接続部6eの前記光源駆動配線62aは、それぞれ予め定めた平行な幅の導電膜からなっている。一方、図5Aに示すように、前記副配線基板8における端子部8aの端子82aは、それぞれ前記光源駆動配線62aの導電膜の幅と等しい幅の幅広部82aと、前記端子82aの先端部で前記幅より狭い幅の狭幅部82aが形成された導電膜からなっている。前記配線接続部6eの前記光源駆動配線62aに、その幅に合わせて前記端子部8aの端子82aを配置し、その状態で重なり合う2つの導電膜の間に半田9を盛ることによって、前記光源駆動配線62aの導電膜と前記端子82aの導電膜とが半田付けされる。 That is, as shown in FIG. 5B, the light source driving wiring 62a of the wiring connecting portion 6e is made of a conductive film having a predetermined parallel width. On the other hand, as shown in FIG. 5A, the terminal 82a of the terminal portion 8a of the sub-wiring board 8 includes a wide portion 82a 1 of width equal to the width of the conductive film of each of the light source driving wires 62a, the tip portion of the terminal 82a in consists narrow portion 82a 2 are formed conductive film narrower than the width. The light source driving wiring 62a of the wiring connection portion 6e is provided with the terminal 82a of the terminal portion 8a in accordance with its width, and solder 9 is placed between two overlapping conductive films in that state, thereby driving the light source. The conductive film of the wiring 62a and the conductive film of the terminal 82a are soldered.

ここで、前記副配線基板8の端子部8aにおける端子82aの先端部には、前記狭幅部82aが形成されている。つまり、前記副配線基板8の端子部8aの端部が前記主配線基板6の前記光源駆動配線62aと接する部分に、前記端子82aの狭幅部82aが形成されている。従って、互いに幅を揃えて重ねられた前記光源駆動配線62aと前記端子82aの2つの導電膜を、前記主配線基板6の面に対して直交する方向から見た平面的な形状が、前記副配線基板8の端子82aの先端部に対応する位置で幅が狭くなったくびれ形状になっている。 Here, the narrow portion 82 a 2 is formed at the tip of the terminal 82 a in the terminal portion 8 a of the sub wiring board 8. That is, the end portion of the terminal portion 8a of the sub-wiring board 8 in a portion in contact with the light source driving wires 62a of the main circuit board 6, the narrow width portion 82a 2 of the terminal 82a is formed. Therefore, the planar shape of the two conductive films of the light source drive wiring 62a and the terminal 82a, which are overlapped with the width of each other, viewed from a direction orthogonal to the surface of the main wiring board 6 is It has a constricted shape with a narrow width at a position corresponding to the tip of the terminal 82a of the wiring board 8.

このくびれ形状となるように配置された2つの導電膜の間に際して、十分な半田9を供給して前記半田付けを行なった場合、図4Aに示すごとく、前記半田9は前記導電膜のくびれを覆って流れ、半田9を盛った後の半田9の形状は、前記導電膜の幅と同じ幅で、且つ導電膜面から十分高い高さに形成され、強い強度での半田付が成される。   When the soldering is performed by supplying a sufficient amount of solder 9 between the two conductive films arranged so as to have a constricted shape, the solder 9 causes the constriction of the conductive film as shown in FIG. 4A. The shape of the solder 9 after flowing over and piling up the solder 9 is the same width as the conductive film and sufficiently high from the conductive film surface, and soldering is performed with a strong strength. .

これに対して、十分な半田9が供給されない状態で前記2つの導電膜の間に半田を盛った場合、図18の比較例で示すように、半田91は、前記導電膜のくびれを覆い隠すこと無く、その半田91の形状は、前記くびれ形状に追随したくびれ形状91aが残り、且つ基板面からの高さも不十分な高さに形成され、強度的に弱い半田付けとなる。   On the other hand, when solder is deposited between the two conductive films in a state where sufficient solder 9 is not supplied, the solder 91 covers the constriction of the conductive film as shown in the comparative example of FIG. Instead, the constricted shape 91a following the constricted shape remains, and the solder 91 is formed with an insufficient height from the substrate surface, resulting in weak soldering.

この実施形態では、前記副配線基板8の端子部8aにおける複数の端子82aの各先端部に狭幅部82aを形成し、これらの各端子82aを、前記主配線基板6における前記配線接続部6eの各光源駆動配線62aに重ねて配置している。前記光源駆動配線62aと前記端子82aの2つの導電膜を合わせた領域の平面形状がくびれた形状を形成し、これらの導電膜の間に半田9を盛るようにすることにより、半田付後の半田9の形状が前記導電膜の幅と同じ幅に形成されていれば良好な半田付けであることが判明できる。これとは違って、半田付後の半田9の形状が前記導電膜のくびれた形状に沿って成されていれば、半田9の量が少ない弱い半田付けであると判明することができる。 In this embodiment, a narrow width portion 82 a 2 is formed at each tip end of the plurality of terminals 82 a in the terminal portion 8 a of the sub wiring substrate 8, and each of these terminals 82 a is connected to the wiring connection portion in the main wiring substrate 6. 6e is arranged so as to overlap each light source drive wiring 62a. By forming a constricted planar shape of the region where the two conductive films of the light source drive wiring 62a and the terminal 82a are combined, and solder 9 is placed between these conductive films, If the shape of the solder 9 is the same as the width of the conductive film, it can be found that the soldering is good. On the other hand, if the shape of the solder 9 after soldering is formed along the constricted shape of the conductive film, it can be determined that the soldering is weak and the amount of the solder 9 is small.

上述したように、この実施形態の半田接続構造は、予め定めた幅を有する導電膜からなる光源駆動配線(第1の配線)62aが形成された主配線基板6上に、予め定めた幅を有する導電膜からなる端子(第2の配線)82aが形成された副配線基板8を、前記第1の配線に前記第2の配線を対応させて配置し、前記第1の配線と前記第2の配線を半田9により接続する半田接続構造において、前記第1の配線と前記第2の配線が前記半田により接続される部分の、前記第1の配線と前記第2の配線の一方に、該一方の配線の幅を狭くした幅狭部82aを形成したので、前記半田9の形状を観察することにより目視で半田付けの良否を判定することができる。 As described above, the solder connection structure of this embodiment has a predetermined width on the main wiring board 6 on which the light source drive wiring (first wiring) 62a made of a conductive film having a predetermined width is formed. A sub-wiring substrate 8 on which a terminal (second wiring) 82a made of a conductive film is formed is disposed so that the second wiring corresponds to the first wiring, and the first wiring and the second wiring In the solder connection structure in which the first wiring and the second wiring are connected by the solder, one of the first wiring and the second wiring is connected to the first wiring and the second wiring. Since the narrow portion 82a 2 in which the width of one wiring is narrowed is formed, the quality of soldering can be determined visually by observing the shape of the solder 9.

この半田接続構造において、前記副配線基板8は、前記主配線基板6の第1の配線が形成された面に接し、前記第2の配線は、前記副配線基板8の前記主配線基板6が接する面とは反対側の面に形成されており、このように前記主配線基板6と前記副配線基板8の同じ側の面に形成された第1の配線と第2の配線を半田付けする場合に、前記半田6の形状が観察しやすく、半田付けの良否を明確に判定することができる。   In this solder connection structure, the sub wiring board 8 is in contact with the surface of the main wiring board 6 on which the first wiring is formed, and the second wiring is formed by the main wiring board 6 of the sub wiring board 8. The first wiring and the second wiring formed on the same surface of the main wiring board 6 and the sub wiring board 8 are soldered as described above. In this case, the shape of the solder 6 can be easily observed, and the quality of soldering can be clearly determined.

前記狭幅部82aを、前記副配線基板8が前記主配線基板6に接する端部において前記第2の配線の端部に形成し、またこの狭幅部82aを前記副配線基板8の前記主配線基板6に接する部分の前記第2の配線に形成されたくびれ形状とすることにより、前記主配線基板6上の導電膜の形状を単純化することができる。 The narrow portion 82a 2 is formed at the end of the second wiring at the end where the sub-wiring board 8 is in contact with the main wiring board 6, and the narrow portion 82a 2 is formed on the sub-wiring board 8. By adopting a constricted shape formed in the second wiring in a portion in contact with the main wiring board 6, the shape of the conductive film on the main wiring board 6 can be simplified.

また、上述した半田接続構造を用いた表示装置は、表示素子1と、前記表示素子1を照明する面光源2と、前記表示素子1を駆動するための信号及び電圧を供給する第1の配線(光源駆動配線62a)が形成された主配線基板6と、前記面光源2を駆動するための電流を供給する第2の配線(端子82a)が形成された副配線基板とを有し、前記主配線基板6の前記第1の配線に、前記副配線基板8の前記第2の配線を対応させて、半田付けを行なう半田付構造とを備える表示装置において、前記第1の配線と前記第2の配線が前記半田により覆われた部分の、前記第1の配線と前記第2の配線の一方に、該一方の配線の幅を狭くした狭幅部82aを形成したので、表示素子1を駆動するための信号を供給する配線が形成された主配線基板6に、面光源2を駆動するための電流が供給される副配線基板8を半田付けする半田付構造の良否を目視で判定することができる。 The display device using the solder connection structure described above includes a display element 1, a surface light source 2 that illuminates the display element 1, and a first wiring that supplies a signal and a voltage for driving the display element 1. A main wiring board 6 on which (light source driving wiring 62a) is formed, and a sub wiring board on which a second wiring (terminal 82a) for supplying a current for driving the surface light source 2 is formed, and In a display device comprising a soldering structure for performing soldering in correspondence with the first wiring of the main wiring board 6 and the second wiring of the sub wiring board 8, the first wiring and the first wiring The narrow portion 82a 2 in which the width of the one wiring is narrowed is formed in one of the first wiring and the second wiring in the portion where the two wirings are covered with the solder. Main wiring board on which wiring for supplying a signal for driving the circuit is formed 6, it is possible to visually determine the quality of the soldering structure for soldering the sub-wiring board 8 to which a current for driving the surface light source 2 is supplied.

(第2実施形態)
この発明の第2の実施形態について、図6を参照して説明する。この図6において、図6Aはこの第2の実施形態における副配線基板108の端子部108aを示す部分拡大図、図6Bはこの第2の実施形態における主配線基板106の配線接続部106eを示す部分拡大図、図6Cはこの第2の実施形態における配線接続部106eを示す部分拡大図である。
尚、この実施形態において、上述した第1の実施形態と同一の部材には同一の符号を付し、説明を省略する。
(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIG. In FIG. 6, FIG. 6A is a partially enlarged view showing the terminal portion 108a of the sub wiring board 108 in the second embodiment, and FIG. 6B shows the wiring connection portion 106e of the main wiring board 106 in the second embodiment. A partially enlarged view and FIG. 6C are partially enlarged views showing the wiring connecting portion 106e in the second embodiment.
In this embodiment, the same members as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

この発明の第2の実施形態における半田接続構造は、図6Bに示すように、前記配線接続部106eの複数の光源駆動配線162aは、それぞれ平行な幅の部分と、その幅より狭い幅のくびれ状の狭幅部162bとが形成された導電膜からなっている。一方、図6Aに示すように、前記副配線基板108の端子部108aには、それぞれ前記配線接続部106eの光源駆動配線162aの幅と等しい幅の導電膜が形成されている。前記配線接続部106eの前記光源駆動配線162aの上に、前記副配線基板108の端子部108a形成された複数の端子182aを、それぞれの導電膜の幅に合わせて、且つ前記端子部108aの先端を、前記光源駆動配線162aの狭幅部162bが露出するように配置し、その状態で重なり合う2つの導電膜の間に半田109を盛ることによって、前記光源駆動配線162aの導電膜と前記端子182aの導電膜とが半田付けされる。   In the solder connection structure according to the second embodiment of the present invention, as shown in FIG. 6B, each of the plurality of light source drive wirings 162a of the wiring connection part 106e has a parallel width portion and a constriction narrower than the width. It is made of a conductive film in which a narrow narrow portion 162b is formed. On the other hand, as shown in FIG. 6A, a conductive film having a width equal to the width of the light source drive wiring 162a of the wiring connection portion 106e is formed on the terminal portion 108a of the sub wiring board 108, respectively. A plurality of terminals 182a formed on the terminal part 108a of the sub-wiring board 108 are formed on the light source driving wiring 162a of the wiring connection part 106e in accordance with the width of each conductive film and the tip of the terminal part 108a. Is disposed so that the narrow portion 162b of the light source driving wiring 162a is exposed, and solder 109 is placed between the two conductive films overlapping in this state, whereby the conductive film of the light source driving wiring 162a and the terminal 182a are disposed. The conductive film is soldered.

この実施形態においても、前記副配線基板108の端子部108aの各先端部が接する各光源駆動配線162aに前記狭幅部162bが形成されている。このため、前記2つの導電膜を、前記主配線基板106の面に対して直交する方向から見た平面的な形状は、前記副配線基板108の複数の端子部108aの各先端部に位置する導電膜の幅が狭くなったくびれ形状に形成されている。   Also in this embodiment, the narrow width portion 162b is formed in each light source driving wiring 162a in contact with each distal end portion of the terminal portion 108a of the sub wiring board 108. For this reason, the planar shape of the two conductive films viewed from the direction orthogonal to the surface of the main wiring board 106 is located at each tip of the plurality of terminal portions 108 a of the sub wiring board 108. The conductive film is formed in a constricted shape with a narrow width.

このくびれ形状となるように配置された2つの導電膜の間に半田109を盛るに際して、十分な半田109を供給して前記半田109を盛った場合、図6Cに示すごとく、前記半田109は、前記導電膜のくびれを覆って流れ、半田109を盛った後の半田109の形状は、前記導電膜の幅と同じ幅で、且つそれぞれの導電膜面から十分高い高さに形成され、強い強度での半田付が成される。   When the solder 109 is stacked between the two conductive films arranged so as to have the constricted shape, when the sufficient solder 109 is supplied and the solder 109 is stacked, as shown in FIG. The shape of the solder 109 after flowing over the constriction of the conductive film and depositing the solder 109 is the same width as the width of the conductive film and is formed at a sufficiently high height from the surface of each conductive film. Soldering at is performed.

よって、この実施形態によれば、半田付後の半田109の形状を観察することにより、半田付けの良否を判断することができる。   Therefore, according to this embodiment, the quality of soldering can be judged by observing the shape of the solder 109 after soldering.

(第3実施形態)
この発明の第3の実施形態について、図7を参照して説明する。この図7において、図7Aはこの第3の実施形態にかかる主配線基板206の配線接続部206eを示す拡大図、図7Bはこの第3の実施形態にかかる配線接続部206eでの接続状態を示す拡大図である。
尚、この実施形態において、上述した第2の実施形態と同一の部材には同一の符号を付し、説明を省略する。
(Third embodiment)
A third embodiment of the present invention will be described with reference to FIG. In FIG. 7, FIG. 7A is an enlarged view showing a wiring connection portion 206e of the main wiring board 206 according to the third embodiment, and FIG. 7B shows a connection state at the wiring connection portion 206e according to the third embodiment. It is an enlarged view shown.
In this embodiment, the same members as those in the second embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

この発明の第3の実施形態における半田接続構造は、図7Aに示すように、前記配線接続部206eの複数の光源駆動配線262aは、それぞれ予め定めた幅で平行な幅広部262aと、その幅より狭い幅で平行な狭幅部262bとが形成された導電膜からなっている。一方、前記副配線基板108の端子部108aは、図6Aに示した前記副配線基板108の端子部108aと同じ形状のものが用いられ、それぞれ端子182aはその幅が、前記光源駆動配線262aの予め定めた幅と等しい幅に形成された導電膜からなっている。前記副配線基板108は、主配線基板206の配線接続部206eの上に前記端子部108aを、それぞれの導電膜の幅広の部分に合わせ、且つ前記端子部108aの先端を前記光源駆動配線262aの狭幅部262bが露出するように配置し、その状態で重なり合う2つの導電膜の間に半田209を盛ることによって、前記光源駆動配線262aの導電膜と前記端子部108aの端子182aとが半田付けされる。 In the solder connection structure according to the third embodiment of the present invention, as shown in FIG. 7A, the plurality of light source drive wirings 262a of the wiring connection part 206e are each of a wide part 262a 1 parallel to a predetermined width, It is made of a conductive film in which a narrow portion 262b that is narrower than the width and parallel is formed. On the other hand, the terminal portion 108a of the sub-wiring board 108 has the same shape as the terminal portion 108a of the sub-wiring board 108 shown in FIG. 6A, and each terminal 182a has a width that is the same as that of the light source driving wiring 262a. The conductive film is formed to have a width equal to a predetermined width. In the sub wiring board 108, the terminal part 108a is aligned with the wide part of each conductive film on the wiring connection part 206e of the main wiring board 206, and the tip of the terminal part 108a is aligned with the light source driving wiring 262a. The narrow width portion 262b is disposed so as to be exposed, and the solder 209 is placed between two overlapping conductive films in this state, whereby the conductive film of the light source driving wiring 262a and the terminal 182a of the terminal portion 108a are soldered. Is done.

この実施形態においても、前記副配線基板108における端子部108aの先端部が接する各光源駆動配線262aに前記狭幅部262bが形成されている。このため、前記光源駆動配線262aとこれに重なる端子182aとからなる2つの導電膜を、前記主配線基板206の面に対して直交する方向から見た平面的な形は、前記副配線基板108の複数の端子部108aの先端部に位置する導電膜に、幅が狭くなったくびれ形状を設けた形状になっている。   Also in this embodiment, the narrow width portion 262b is formed in each light source drive wiring 262a with which the tip end portion of the terminal portion 108a in the sub wiring board 108 contacts. For this reason, the planar shape of the two conductive films composed of the light source driving wiring 262a and the terminal 182a overlapping therewith when viewed from the direction orthogonal to the surface of the main wiring board 206 is the sub wiring board 108. The conductive film located at the tip of each of the plurality of terminal portions 108a is provided with a constricted shape with a narrow width.

このくびれ形状となるように配置された2つの導電膜の間に半田209を盛るに際して、十分な量の半田を供給して前記半田209を盛った場合、図7Bに示すごとく、前記半田209は、前記導電膜のくびれを覆って流れ、半田209を盛った後の半田209の形状は、前記導電膜の幅と同じ幅で、且つ導電膜面から十分高い高さに形成され、強い強度での半田付が成される。   When the solder 209 is stacked between two conductive films arranged so as to have a constricted shape, when the solder 209 is stacked by supplying a sufficient amount of solder, as shown in FIG. The shape of the solder 209 after flowing over the constriction of the conductive film and depositing the solder 209 is the same width as the width of the conductive film and is sufficiently high from the conductive film surface, Is soldered.

よって、この実施形態によれば、半田付後の半田の形状を観察することにより、半田付けの良否を判定することができる。   Therefore, according to this embodiment, the quality of soldering can be determined by observing the shape of solder after soldering.

このように、上述した第2、第3の実施形態で示した半田接続構造のように、前記狭幅部162b,262bを前記主配線基板206の前記第1の配線(光源駆動配線162a,262a)に形成し、また前記狭幅部162b,262bを前記主配線基板106,206)の前記副配線基板108に接する部分の前記第1の配線に形成されたくびれ形状とすることにより、前記副配線基板108上の導電膜の形状を単純化することができる。   Thus, like the solder connection structures shown in the second and third embodiments described above, the narrow portions 162b and 262b are replaced with the first wiring (light source driving wirings 162a and 262a) of the main wiring board 206. And the narrow width portions 162b and 262b are formed in a constricted shape formed in the first wiring in the portion of the main wiring board 106, 206) that is in contact with the sub wiring board 108. The shape of the conductive film on the wiring substrate 108 can be simplified.

尚、この発明の上述した実施形態において、前記主配線基板6,106,206の配線接続部6e,106e,206eにおける前記光源駆動配線62a,162a,262aと、前記副配線基板8,108の前記端子部8a,108aにおける端子82a,182aのうちのいずれか一方に狭幅部82a,162b,262bを形成した場合を示しているが、この発明は、これに限ることなく、前記光源駆動配線62a,162a,262aおよび前記端子82a,182aの両方に狭幅部82a2,162b,262bを形成するようにしても良い。この場合は、図6B、あるいは図7Aに記載された主配線基板106,206の配線接続部106e,206eのいずれかに、図5Aに示した副配線基板108の前記端子部82aを接続する用にしても良い。 In the above-described embodiment of the present invention, the light source drive wirings 62a, 162a, 262a in the wiring connection portions 6e, 106e, 206e of the main wiring boards 6, 106, 206 and the sub wiring boards 8, 108 are described above. Although the case where the narrow width portions 82a 2 , 162b and 262b are formed in any one of the terminals 82a and 182a in the terminal portions 8a and 108a is shown, the present invention is not limited to this, and the light source driving wiring is not limited thereto. Narrow width portions 82a2, 162b, 262b may be formed in both of 62a, 162a, 262a and the terminals 82a, 182a. In this case, for connecting the terminal portion 82a of the sub wiring board 108 shown in FIG. 5A to any one of the wiring connection portions 106e and 206e of the main wiring boards 106 and 206 shown in FIG. 6B or FIG. 7A. Anyway.

(第4実施形態)
この発明の第4の実施形態について、図8ないし図10を参照して説明する。図8はこの第4の実施形態にかかる半田接続構造を分解して示す分解斜視図、図9は第4の実施形態にかかる配線構造を示す部分拡大図、図10は、図9のX−X線で切断して示す拡大断面図である。
尚、この実施形態において、上述した第1の実施形態と同一の部材には同一の符号を付し、説明を省略する。
(Fourth embodiment)
A fourth embodiment of the present invention will be described with reference to FIGS. 8 is an exploded perspective view showing the solder connection structure according to the fourth embodiment in an exploded manner, FIG. 9 is a partially enlarged view showing the wiring structure according to the fourth embodiment, and FIG. It is an expanded sectional view cut and shown by X-rays.
In this embodiment, the same members as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

この発明の第4の実施形態における半田接続構造は、主配線基板306上の光源駆動配線362に接続される副配線基板308の端子382aの先端の端面に導電膜を形成し、前記端子382aの導電膜に、その基板の先端の端面にも導電膜を設けることにより半田による接続強度を強くするようにしたものである。   In the solder connection structure according to the fourth embodiment of the present invention, a conductive film is formed on the end face of the terminal 382a of the sub wiring board 308 connected to the light source driving wiring 362 on the main wiring board 306, and the terminal 382a The conductive film is also provided on the end face of the front end of the substrate to increase the connection strength by solder.

図8に示すように、表示素子1に接続された主配線基板306上には、光源を駆動するための信号が供給される複数の光源駆動配線362aが形成されており、これらの光源駆動配線362aを覆う前記保護膜363の一部が除去されて前記光源駆動配線362aが露出する配線接続部306eが設けられている。   As shown in FIG. 8, on the main wiring board 306 connected to the display element 1, a plurality of light source driving wirings 362a to which a signal for driving the light source is supplied are formed. A part of the protective film 363 covering 362a is removed, and a wiring connection part 306e is provided to expose the light source driving wiring 362a.

光源駆動配線362aは、第3の実施形態において述べた複数の光源駆動配線262aと同様に、前記配線接続部306eの複数の光源駆動配線362aは、それぞれ予め定めた幅で平行な幅広部362aと、その幅より狭い幅で平行な狭幅部362bとが形成された導電膜からなっている。一方、前記副配線基板308の端子部308aには、図8及び図10に示すように、前記光源駆動配線362aの予め定めた幅と等しい幅に形成された上面導電膜382bと、前記端子部308aの先端の端面に形成され、前記上面導電膜382b及び前記光源駆動配線362aと電気的に接続された端面導電膜382cとからなる複数の端子382aが形成されている。 The light source drive wiring 362a is similar to the plurality of light source drive wirings 262a described in the third embodiment, and the plurality of light source drive wirings 362a of the wiring connection portion 306e are each a wide portion 362a 1 parallel to a predetermined width. And a conductive film in which a narrow portion 362b having a width narrower than that and parallel to each other is formed. On the other hand, as shown in FIGS. 8 and 10, the terminal portion 308a of the sub-wiring substrate 308 has a top conductive film 382b formed to have a width equal to a predetermined width of the light source driving wiring 362a, and the terminal portion. A plurality of terminals 382a are formed, which are formed on the end face of the front end of 308a and include the top conductive film 382b and the end conductive film 382c electrically connected to the light source driving wiring 362a.

前記副配線基板308の端子部308aに形成される複数の端子382aそれぞれを構成する端面導電膜382cは、前記副配線基板308の端子部308aの先端の端面に無電界メッキにより形成される。たとえば、端子部308aの端面に、前記上面導電膜382bと対させ且つ同じ幅でメタライズ処理を施し、その後無電界電メッキによりそのメタライズ処理された部分だけに銅、ニッケル等の金属からなる導電膜を堆積させることによって前記端面導電膜382c製造される。あるいは、端子部308aの端面全体にメタライズ処理を施し、その後無電界電メッキによりそのメタライズ処理された端面全体に銅、ニッケル等の金属からなる導電膜を形成し、その導電膜を前記上面導電膜382bと対させ且つ同じ幅となるようにエッチングすることによって、前記端面導電膜382cが製造される。   The end face conductive film 382c constituting each of the plurality of terminals 382a formed on the terminal portion 308a of the sub wiring board 308 is formed on the end face at the tip of the terminal portion 308a of the sub wiring board 308 by electroless plating. For example, the end surface of the terminal portion 308a is metallized with the same width as the upper surface conductive film 382b, and then a conductive film made of a metal such as copper or nickel only on the portion metallized by electroless plating. The end face conductive film 382c is manufactured by depositing. Alternatively, the entire end face of the terminal portion 308a is subjected to a metallization process, and then a conductive film made of a metal such as copper or nickel is formed on the entire end face subjected to the metallization process by electroless plating, and the conductive film is used as the upper surface conductive film. The end face conductive film 382c is manufactured by etching so as to face the 382b and have the same width.

前記副配線基板308は、主配線基板306の配線接続部306eの上に前記端子部308aを、それぞれ互いの導電膜の幅広の部分に合わせ、且つ前記端子部308aの先端の前記端面導電膜382cを前記光源駆動配線362aの狭幅部362bの一部が露出するように配置し、その状態で重なり合う2つの導電膜の間に半田309を盛ることによって、前記配線接続部306eの前記光源駆動配線362aと、前記端子部308aの端子382aの前記上面導電膜382bとともに端面導電膜382cが半田付けによって接続される。   The sub-wiring board 308 has the terminal part 308a on the wiring connection part 306e of the main wiring board 306, and the end face conductive film 382c at the tip of the terminal part 308a. Is arranged so that a part of the narrow portion 362b of the light source drive wiring 362a is exposed, and solder 309 is placed between the two conductive films overlapping in this state, whereby the light source drive wiring of the wiring connection portion 306e The end surface conductive film 382c is connected to the 362a together with the upper surface conductive film 382b of the terminal 382a of the terminal portion 308a by soldering.

この実施形態によれば、前記副配線基板308における端子部308aの先端部が接する各光源駆動配線362aに前記狭幅部362bが形成され、また、前記端子部308aの端子382aは、前記上面導電膜382bとともに端面導電膜382cが形成されている。このため、各光源駆動配線362aとこれに重なる端子382aの前記上面導電膜382bからなる2つの導電膜を、前記主配線基板306の面に対して直交する方向から見た平面的な形は、前記副配線基板308の端子部308aの先端部に位置する導電膜に、幅が狭くなったくびれ形状を設けた形状になっている。   According to this embodiment, the narrow width portion 362b is formed in each light source drive wiring 362a in contact with the tip portion of the terminal portion 308a in the sub-wiring board 308, and the terminal 382a of the terminal portion 308a An end face conductive film 382c is formed together with the film 382b. For this reason, the planar shape of the two conductive films made of the upper surface conductive film 382b of each light source drive wiring 362a and the terminal 382a overlapping therewith is viewed from the direction orthogonal to the surface of the main wiring board 306, The conductive film located at the tip of the terminal portion 308a of the sub-wiring board 308 has a constricted shape with a narrow width.

このように、くびれ形状となるように配置された2つの導電膜の間に半田309を盛るに際して、十分な量の半田を供給して前記半田309を盛った場合、図9に示すごとく、前記半田309は、前記導電膜のくびれを覆って流れ、半田309を盛った後の半田309の形状は、前記導電膜の幅と同じ幅で、且つ導電膜面から十分高い高さに形成され、また端面導電膜382cも共にハンダ付けされるから、半田付け面積が増えて、強い強度での半田付が成される。   Thus, when solder 309 is stacked between two conductive films arranged to have a constricted shape, when a sufficient amount of solder is supplied and the solder 309 is stacked, as shown in FIG. The solder 309 flows over the constriction of the conductive film, and the shape of the solder 309 after depositing the solder 309 is the same width as the width of the conductive film and is sufficiently high from the conductive film surface, Further, since the end face conductive film 382c is also soldered, the soldering area is increased and soldering with high strength is performed.

よって、この実施形態によれば、半田付後の半田の形状を観察することにより、半田付けの良否を判定することができ、また強い強度のハンダ付けが可能となる。   Therefore, according to this embodiment, the quality of soldering can be determined by observing the shape of the solder after soldering, and strong soldering can be performed.

このように、この実施形態の半田接続構造は、前記端子382aからなる第2の配線が形成された前記副配線基板308は、前記主配線基板306と接する前記副配線基板208の先端端面に、前記第2の配線と電気的に接続された端面導電膜382cを備えるようにしたので、半田付後の半田の形状を観察することにより、半田付けの良否を判定することができ、また強い強度のハンダ付けが可能となる。   As described above, in the solder connection structure of this embodiment, the sub wiring board 308 on which the second wiring composed of the terminals 382a is formed has a tip end face of the sub wiring board 208 in contact with the main wiring board 306. Since the end face conductive film 382c electrically connected to the second wiring is provided, the quality of soldering can be determined by observing the shape of the solder after soldering, and strong strength Can be soldered.

また、この実施形態の半田接続構造は、前記端面導電膜382cが、前記第2の配線の幅と等しく形成されているので、また強い強度のハンダ付けが可能となる。   In the solder connection structure of this embodiment, since the end face conductive film 382c is formed to be equal to the width of the second wiring, it is possible to perform soldering with high strength.

さらに、この実施形態の半田接続構造は、主配線基板306に形成された光源駆動配線362aからなる第1の配線は、予め定めた幅で平行な部分362aと、その幅より狭い幅で平行な狭幅部362bとが形成された導電膜からなり、前記副配線基板308に形成された前記第2の配線は、前記第1の配線の幅と等しい幅に形成された上面導電膜382bと、前記副配線基板308の先端面に形成され、前記上面導電膜382bと電気的に接続された端面導電膜382cを備えるようにしたので、半田付後の半田の形状を観察することにより、半田付けの良否を判定することができ、また強い強度のハンダ付けが可能となる。 Furthermore, the solder connection structure of this embodiment, a first wiring formed from the main wirings light source drive wires 362a formed on the substrate 306, a parallel part 362a 1 at a predetermined width, parallel width narrower than the width The second wiring formed on the sub-wiring substrate 308 includes a top conductive film 382b formed to have a width equal to the width of the first wiring. Since the end surface conductive film 382c formed on the front end surface of the sub wiring substrate 308 and electrically connected to the upper surface conductive film 382b is provided, the solder shape after the soldering is observed, It is possible to determine whether the soldering is good or not, and it is possible to perform soldering with strong strength.

(第5実施形態)
この発明の第5の実施形態について、図11を参照して説明する。この図11において、図11Aはこの第5の実施形態における副配線基板408の端子部408aを示す部分拡大図、図11Bはこの第5の実施形態における配線接続部406eの半田接続状態を示す部分拡大図である。
尚、この実施形態において、上述した第1の実施形態と同一の部材には同一の符号を付し、説明を省略する。
(Fifth embodiment)
A fifth embodiment of the present invention will be described with reference to FIG. In FIG. 11, FIG. 11A is a partially enlarged view showing the terminal portion 408a of the sub-wiring board 408 in the fifth embodiment, and FIG. 11B is a portion showing the solder connection state of the wiring connecting portion 406e in the fifth embodiment. It is an enlarged view.
In this embodiment, the same members as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

この発明の第5の実施形態における半田接続構造は、図1乃至図5に示した第1の実施形態に用いられた前記主配線基板6における前記配線接続部406eの各光源駆動配線62に、図11Aに示した副配線基板408の端子482aを接続したものであり、端子482aは、その先端に端面導電膜482cが設けられている。   A solder connection structure according to the fifth embodiment of the present invention is provided in each light source drive wiring 62 of the wiring connection portion 406e in the main wiring board 6 used in the first embodiment shown in FIGS. The terminal 482a of the sub wiring board 408 shown in FIG. 11A is connected, and the terminal 482a is provided with an end face conductive film 482c at the tip thereof.

すなわち、副配線基板408の端子部408aは、それぞれ前記光源駆動配線62aの導電膜の幅と等しい幅の幅広部482aと、端子482aの先端部で前記導電膜の幅より狭い幅の狭幅部482aが形成された導電膜と、前記端子部408aの先端の端面に、前記狭幅部482aと同じ幅で且つ狭幅部482a及び光源駆動配線62と電気的に接続された端面導電膜482cとからなっている。 That is, the auxiliary terminal portions 408a of the wiring substrate 408 includes a wide portion 482a 1 width equal to the width of the conductive film of each of the light source driving wires 62a, narrow width narrower than the width of the conductive layer at the tip portion of the terminal 482a a conductive film part 482a 2 is formed on an end surface of the distal end of the terminal portion 408a, the narrow portion 482a 2 and the and narrow portion 482a 2 and the light source driving wires 62 and electrically connected to the end face with the same width The conductive film 482c is included.

前記端子部408aの先端の端面に設けられる端面導電膜482cは、上述した第4の実施形態で述べたと同様に、前記副配線基板408の端子部408aの先端に無電界メッキによって形成されている。   The end face conductive film 482c provided on the end face of the terminal portion 408a is formed by electroless plating at the end of the terminal portion 408a of the sub wiring board 408, as described in the fourth embodiment. .

そして、前記配線接続部406eの前記光源駆動配線62に、その幅に合わせて前記端子部408aの端子482aを配置し、その状態で重なり合う2つの導電膜の間に半田409を盛ることによって、前記光源駆動配線62aの導電膜と前記端子482aの導電膜とが半田付けされる。   Then, the terminal 482a of the terminal portion 408a is arranged in the light source driving wiring 62 of the wiring connection portion 406e in accordance with the width thereof, and the solder 409 is placed between two overlapping conductive films in that state, thereby The conductive film of the light source drive wiring 62a and the conductive film of the terminal 482a are soldered.

この実施形態によれば、前記副配線基板408における端子部408aの先端が接する各光源駆動配線62aに前記狭幅部62bが形成され、また、前記端子部408aの端子482aは、その先端に端面導電膜482cが形成されている。このため、各光源駆動配線62aとこれに重なる端子482aからなる2つの導電膜を、前記主配線基板6の面に対して直交する方向から見た平面的な形は、前記副配線基板408の端子部408aの先端に位置する導電膜に、幅が狭くなったくびれ形状を設けた形状になっている。   According to this embodiment, the narrow portion 62b is formed in each light source drive wiring 62a that contacts the tip of the terminal portion 408a in the sub-wiring board 408, and the terminal 482a of the terminal portion 408a has an end face at the tip. A conductive film 482c is formed. For this reason, the planar shape of the two conductive films composed of the light source drive wirings 62a and the terminals 482a overlapping with each light source driving wiring 62a when viewed from the direction orthogonal to the surface of the main wiring board 6 is the same as that of the sub wiring board 408. The conductive film located at the tip of the terminal portion 408a has a constricted shape with a narrow width.

このように、くびれ形状となるように配置された2つの導電膜の間に半田409を盛るに際して、十分な量の半田を供給した場合、図11Bに示すごとく、前記半田409は、前記導電膜のくびれを覆って流れ、半田409を盛った後の形状は、前記導電膜の幅と同じ幅で、且つ導電膜面から十分高い高さに形成され、また端面導電膜482cも共にハンダ付けされるから、半田付け面積が増えて、強い強度での半田付が成される。   As described above, when a sufficient amount of solder is supplied when the solder 409 is stacked between the two conductive films arranged so as to have a constricted shape, the solder 409 is formed as shown in FIG. 11B. The shape after flowing over the constriction and depositing the solder 409 is formed to be the same width as the conductive film and sufficiently high from the conductive film surface, and the end face conductive film 482c is also soldered together. Therefore, the soldering area is increased, and soldering with strong strength is performed.

よって、この実施形態によれば、半田付後の半田の形状を観察することにより、半田付けの良否を判定することができ、また強い強度のハンダ付けが可能となる。   Therefore, according to this embodiment, the quality of soldering can be determined by observing the shape of the solder after soldering, and strong soldering can be performed.

このように、この実施形態の半田接続構造は、前記副配線基板408に形成された前記第2の配線が、幅広の導電膜からなる幅広部482aと、前記副配線基板408の先端で前記導電膜の幅より狭い幅の狭幅の導電膜からなる狭幅部482aと、前記副配線基板408の先端面に、前記狭幅の導電膜と同じ幅で且つその導電膜と電気的に接続された端面導電膜482cを備えているので、半田付後の半田の形状を観察することにより、半田付けの良否を判定することができ、また強い強度のハンダ付けが可能となる。 As described above, in the solder connection structure of this embodiment, the second wiring formed on the sub-wiring board 408 includes the wide portion 482a 1 made of a wide conductive film and the tip of the sub-wiring board 408. A narrow portion 482a 2 made of a narrow conductive film having a width narrower than that of the conductive film, and a front end surface of the sub-wiring substrate 408 have the same width as the narrow conductive film and are electrically connected to the conductive film. Since the connected end face conductive film 482c is provided, it is possible to determine whether the soldering is good or not by observing the shape of the solder after soldering, and it is possible to perform soldering with strong strength.

(第6実施形態)
この発明の第6の実施形態について、図12を参照して説明する。この図12において、図12Aはこの第6の実施形態における副配線基板508の端子部508aを示す部分拡大図、図12Bはこの第6の実施形態における配線接続部6eの半田接続状態を示す部分拡大図である。
尚、この実施形態において、上述した第1の実施形態と同一の部材には同一の符号を付し、説明を省略する。
(Sixth embodiment)
A sixth embodiment of the present invention will be described with reference to FIG. In FIG. 12, FIG. 12A is a partially enlarged view showing the terminal portion 508a of the sub-wiring board 508 in the sixth embodiment, and FIG. 12B is a portion showing the solder connection state of the wiring connecting portion 6e in the sixth embodiment. It is an enlarged view.
In this embodiment, the same members as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

この発明の第6の実施形態における半田接続構造は、図1乃至図5に示した第1の実施形態に用いられた前記主配線基板6における前記配線接続部6eの各光源駆動配線62aに、図12Aに示した副配線基板508の端子582aを接続したものであり、端子582aは、その先端に端面導電膜582cが設けられている。   The solder connection structure according to the sixth embodiment of the present invention has a light source driving wiring 62a of the wiring connection portion 6e in the main wiring board 6 used in the first embodiment shown in FIGS. The terminal 582a of the sub wiring board 508 shown in FIG. 12A is connected, and the terminal 582a is provided with an end face conductive film 582c at the tip thereof.

すなわち、副配線基板508における端子部508aの端子582aは、それぞれ前記光源駆動配線62aの導電膜の幅と等しい幅の幅広部582aと、端子582aの先端部で前記導電膜の幅より狭い幅の狭幅部582aが形成された導電膜と、前記端子部508aの先端の端面に、前記幅広部582aと同じ幅で且つ狭幅部482a及び光源駆動配線62と電気的に接続された端面導電膜582cとからなっている。 That is, the terminal 582a of the terminal portion 508a in the sub-circuit board 508 includes a wide portion 582a 1 width equal to the width of the conductive film of each of the light source driving wires 62a, narrower than the width of the conductive layer at the tip portion of the terminal 582a The conductive film in which the narrow part 582a 2 is formed and the end face at the tip of the terminal part 508a are electrically connected to the narrow part 482a 2 and the light source driving wiring 62 with the same width as the wide part 582a 1. And an end face conductive film 582c.

前記端子部508aの先端の端面に設けられる端面導電膜582cは、上述した第4の実施形態で述べたと同様に、前記副配線基板508の端子部508aの先端に無電界メッキによって形成されている。   The end face conductive film 582c provided on the end face of the terminal portion 508a is formed by electroless plating at the end of the terminal portion 508a of the sub wiring substrate 508, as described in the fourth embodiment. .

そして、前記配線接続部6eの前記光源駆動配線62aに、その幅に合わせて前記端子部508aの端子582aを配置し、その状態で重なり合う2つの導電膜の間に半田509を盛ることによって、前記光源駆動配線62aの導電膜と前記端子582aの導電膜とが半田付けされる。   Then, by arranging the terminal 582a of the terminal portion 508a in accordance with the width of the light source driving wiring 62a of the wiring connection portion 6e, and placing the solder 509 between two overlapping conductive films in that state, The conductive film of the light source drive wiring 62a and the conductive film of the terminal 582a are soldered.

この実施形態によれば、前記副配線基板508における端子部508aの先端が接する各光源駆動配線62aに前記狭幅部62bが形成され、また、前記端子部508aの端子582aは、その先端に端面導電膜582cが形成されている。このため、各光源駆動配線62aとこれに重なる端子582aとからなる2つの導電膜を、前記主配線基板6の面に対して直交する方向から見た平面的な形は、前記副配線基板508の端子部508aの先端に位置する導電膜に、幅が狭くなったくびれ形状を設けた形状になっている。   According to this embodiment, the narrow portion 62b is formed in each light source drive wiring 62a that contacts the tip of the terminal portion 508a in the sub-wiring board 508, and the terminal 582a of the terminal portion 508a has an end face at the tip. A conductive film 582c is formed. For this reason, the planar shape of the two conductive films composed of the respective light source drive wirings 62a and the terminals 582a overlapping therewith when viewed from the direction orthogonal to the surface of the main wiring board 6 is the sub wiring board 508. The conductive film located at the tip of the terminal portion 508a is provided with a constricted shape with a narrow width.

このように、くびれ形状となるように配置された2つの導電膜の間に半田509を盛るに際して、十分な量の半田を供給した場合、図12Bに示すごとく、前記半田509は、前記導電膜のくびれを覆って流れ、半田509を盛った後の形状は、前記導電膜の幅と同じ幅で、且つ導電膜面から十分高い高さに形成され、また端面導電膜582cも共にハンダ付けされるから、半田付け面積が増えて、強い強度での半田付が成される。   As described above, when a sufficient amount of solder is supplied when the solder 509 is stacked between the two conductive films arranged so as to have a constricted shape, the solder 509 has the conductive film as shown in FIG. 12B. The shape after flowing over the constriction and depositing the solder 509 is formed to be the same width as the conductive film and sufficiently high from the conductive film surface, and the end conductive film 582c is also soldered together. Therefore, the soldering area is increased, and soldering with strong strength is performed.

よって、この実施形態によれば、半田付後の半田の形状を観察することにより、半田付けの良否を判定することができ、また強い強度のハンダ付けが可能となる。   Therefore, according to this embodiment, the quality of soldering can be determined by observing the shape of the solder after soldering, and strong soldering can be performed.

このように、この実施形態の半田接続構造は、前記副配線基板508に形成された前記第2の配線が、幅広の導電膜からなる幅広部582aと、前記副配線基板508の先端で前記導電膜の幅より狭い幅の狭幅の導電膜からなる狭幅部582aと、前記副配線基板の先端面に、前記幅広の導電膜と同じ幅で且つその導電膜と電気的に接続された端面導電膜582cを備えるようにしたので半田付後の半田の形状を観察することにより、半田付けの良否を判定することができ、また強い強度のハンダ付けが可能となる。 As described above, in the solder connection structure of this embodiment, the second wiring formed on the sub wiring substrate 508 has the wide portion 582a 1 made of a wide conductive film and the tip of the sub wiring substrate 508. A narrow portion 582a 2 made of a narrow conductive film having a width narrower than that of the conductive film, and a front end surface of the sub-wiring substrate have the same width as the wide conductive film and are electrically connected to the conductive film. Since the end face conductive film 582c is provided, it is possible to determine whether soldering is good or not by observing the shape of the solder after soldering, and to perform strong soldering.

(第7実施形態)
この発明の第7の実施形態について、図13を参照して説明する。この図13において、図13Aはこの第7の実施形態における副配線基板608の端子部608aを示す部分拡大図、図13Bはこの第7の実施形態における配線接続部106eの接続状態を示す部分拡大図である。
尚、この実施形態において、上述した第2の実施形態と同一の部材には同一の符号を付し、説明を省略する。
(Seventh embodiment)
A seventh embodiment of the present invention will be described with reference to FIG. In FIG. 13, FIG. 13A is a partially enlarged view showing the terminal portion 608a of the sub-wiring board 608 in the seventh embodiment, and FIG. 13B is a partially enlarged view showing the connection state of the wiring connecting portion 106e in the seventh embodiment. FIG.
In this embodiment, the same members as those in the second embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

この発明の第7の実施形態における半田接続構造は、図6に示した第2の実施形態に用いられた前記主配線基板106における前記配線接続部106eの各光源駆動配線162aに、図13Aに示した副配線基板608の端子682aを接続したものであり、端子682aは、その先端に端面導電膜682cが設けられている。   The solder connection structure in the seventh embodiment of the present invention is shown in FIG. 13A in each light source drive wiring 162a of the wiring connection portion 106e in the main wiring board 106 used in the second embodiment shown in FIG. The terminal 682a of the sub-wiring board 608 shown is connected, and the terminal 682a is provided with an end face conductive film 682c at the tip thereof.

すなわち、副配線基板608の端子部608aは、それぞれ前記光源駆動配線162aの導電膜の幅と等しい幅の端子682aと、前記端子部608aの先端の端面に、前記端子682aと同じ幅で且つ前記端子682a及び光源駆動配線162と電気的に接続された端面導電膜682cとからなっている。   That is, the terminal portion 608a of the sub wiring board 608 has a terminal 682a having a width equal to the width of the conductive film of the light source driving wiring 162a, and an end face at the tip of the terminal portion 608a having the same width as the terminal 682a and the It is composed of a terminal 682a and an end face conductive film 682c electrically connected to the light source driving wiring 162.

前記端子部608aの先端の端面に設けられる端面導電膜682cは、上述した第4の実施形態で述べたと同様に、前記副配線基板608の端子部608aの先端に無電界メッキによって形成されている。   The end face conductive film 682c provided on the end face of the terminal portion 608a is formed by electroless plating at the end of the terminal portion 608a of the sub wiring substrate 608, as described in the fourth embodiment. .

そして、上述した図6Bに記載の前記配線接続部106eの前記光源駆動配線162aに、前記端子部608aの端子682aの幅に合わせ、且つ前記端面導電膜682cの先端を前記光源駆動配線162aの狭幅部162bが露出するように配置し、その状態で重なり合う光源駆動配線162a、端子682a、及び前記端面導電膜682cに半田609を流し、且つ盛ることによって、前記光源駆動配線162aの導電膜と前記端子682aの導電膜とが半田付けされる。   Then, the light source driving wiring 162a of the wiring connecting portion 106e shown in FIG. 6B described above is aligned with the width of the terminal 682a of the terminal portion 608a and the tip of the end face conductive film 682c is narrowed in the light source driving wiring 162a. The width portion 162b is disposed so as to be exposed, and solder 609 is poured and accumulated on the light source drive wiring 162a, the terminal 682a, and the end face conductive film 682c that overlap in that state, whereby the conductive film of the light source drive wiring 162a and the conductive film The conductive film of the terminal 682a is soldered.

この実施形態によれば、前記副配線基板608における端子部608aの先端が接する各光源駆動配線162aに前記狭幅部162bが形成され、また、前記端子部608aの端子682aには、その先端に端面導電膜682cが形成されている。このため、各光源駆動配線162aとこれに重なる端子682aのからなる2つの導電膜を、前記主配線基板106の面に対して直交する方向から見た平面的な形は、前記副配線基板608の端子部608aの先端に位置する導電膜に、幅が狭くなったくびれ形状を設けた形状になっている。   According to this embodiment, the narrow width portion 162b is formed in each light source drive wiring 162a in contact with the tip of the terminal portion 608a in the sub-wiring substrate 608, and the terminal 682a of the terminal portion 608a has a tip at its tip. An end face conductive film 682c is formed. For this reason, the planar shape of the two conductive films composed of the respective light source driving wirings 162a and the terminals 682a overlapping with the light source driving wirings 162a as viewed from the direction orthogonal to the surface of the main wiring board 106 is the sub wiring board 608. The conductive film located at the tip of the terminal portion 608a has a constricted shape with a narrow width.

このくびれ形状となるように配置された2つの導電膜の間に半田609を盛るに際して、十分な量の半田を供給した場合、図13Bに示すごとく、前記半田609は、前記導電膜のくびれを覆って流れ、半田609を盛った後の形状は、前記導電膜の幅と同じ幅で、且つ導電膜面から十分高い高さに形成され、また端面導電膜682cも共にハンダ付けされるから、半田付け面積が増えて、強い強度での半田付が成される。   When a sufficient amount of solder is supplied when placing solder 609 between the two conductive films arranged so as to form a constricted shape, the solder 609 causes the constriction of the conductive film as shown in FIG. 13B. Since the shape after flowing and covering the solder 609 is the same as the width of the conductive film and is sufficiently high from the conductive film surface, the end conductive film 682c is also soldered together. The soldering area is increased, and soldering with strong strength is performed.

よって、この実施形態によれば、半田付後の半田の形状を観察することにより、半田付けの良否を判定することができ、また強い強度のハンダ付けが可能となる。   Therefore, according to this embodiment, the quality of soldering can be determined by observing the shape of the solder after soldering, and strong soldering can be performed.

このように、この実施形態の半田接続構造は、主配線基板106に形成された光源駆動配線162aからなる第1の配線は、平行な部分からなる導電膜と、その幅より狭い幅で平行な狭幅部162bとが形成された導電膜からなり、前記副配線基板608に形成された前記第2の配線は、前記第1の配線の予め定めた幅と等しい幅に形成された導電膜からなる端子682aと、前記副配線基板608の先端面に前記導電膜の平行な部分同じ幅に形成され、電気的に接続された端面導電膜682cを備えているので、半田付後の半田の形状を観察することにより、半田付けの良否を判定することができ、また強い強度のハンダ付けが可能となる。   As described above, in the solder connection structure of this embodiment, the first wiring formed of the light source driving wiring 162a formed on the main wiring board 106 is parallel to the conductive film formed of parallel portions and narrower than the width thereof. The second wiring formed on the sub-wiring substrate 608 is formed of a conductive film formed with a width equal to a predetermined width of the first wiring. The terminal 682a and the end surface conductive film 682c formed on the front end surface of the sub wiring substrate 608 with the same width and electrically connected to the front end surface of the sub conductive substrate 608 are provided. By observing this, it is possible to determine whether soldering is good or not, and it is possible to perform soldering with strong strength.

(第8実施形態)
この発明の第8の実施形態について、図14を参照して説明する。この図14において、図14Aはこの第8の実施形態における副配線基板708の端子部708aを示す部分拡大図、図14Bはこの第8の実施形態における配線接続部6eを示す部分拡大図である。
尚、この実施形態において、上述した第1の実施形態と同一の部材には同一の符号を付し、説明を省略する。
(Eighth embodiment)
An eighth embodiment of the present invention will be described with reference to FIG. In FIG. 14, FIG. 14A is a partially enlarged view showing the terminal portion 708a of the sub wiring board 708 in the eighth embodiment, and FIG. 14B is a partially enlarged view showing the wiring connecting portion 6e in the eighth embodiment. .
In this embodiment, the same members as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

この発明の第8の実施形態における半田接続構造は、図1乃至図5に示した第1の実施形態に用いられた前記主配線基板6における前記配線接続部6eの各光源駆動配線62aに、図14Aに示した副配線基板708の端子782aを接続したものであり、端子782aは、その先端における導電膜の側面が基板と共に円弧状に切り欠かれている。   The solder connection structure according to the eighth embodiment of the present invention includes a light source drive wiring 62a of the wiring connection portion 6e in the main wiring board 6 used in the first embodiment shown in FIGS. The terminal 782a of the sub-wiring board 708 shown in FIG. 14A is connected, and the terminal 782a has a side surface of the conductive film at the tip thereof cut out in an arc shape together with the board.

すなわち、副配線基板708の端子部708aは、それぞれ前記光源駆動配線62aの導電膜の幅と等しい幅の導電膜からなる幅広部782aと、その端子782aの先端が前記端子部の両側から円弧状に切り欠部782dが形成され、先端の幅が狭くなった狭幅部782aとからなる端子782aを備え、前記端子782aの導電膜の断面が前記切り欠部782dに露出するように形成されている。 That is, the terminal portion 708a of the sub-circuit board 708 includes a wide portion 782a 1, each formed of a conductive film having a width equal to the width of the conductive film of the light source drive wires 62a, circle from both sides of the tip of the terminal 782a is the terminal portion cut-out portions 782d cut in an arc is formed, with a terminal 782a consisting of narrow portion 782a 2 Metropolitan the width of the tip is narrowed, formed so that the cross section of the conductive film of the terminal 782a is exposed to the cut out portions 782d Has been.

前記端子部708aの先端の端面に形成される切り欠部782dは、前記端子部708aの先端の両側を、前記端子782aの導電膜と共にポンチ等の工具により切断することによって形成される。   The notch 782d formed on the end surface of the tip of the terminal portion 708a is formed by cutting both sides of the tip of the terminal portion 708a with a tool such as a punch together with the conductive film of the terminal 782a.

そして、前記配線接続部6eの前記光源駆動配線62aに、その幅に合わせて前記端子部708aの端子782aを配置し、その状態で重なり合う2つの導電膜の間に半田709を盛ることによって、前記光源駆動配線62aの導電膜と前記端子782aの導電膜とが半田付けされる。   Then, the terminal 782a of the terminal portion 708a is arranged in accordance with the width of the light source driving wiring 62a of the wiring connection portion 6e, and the solder 709 is placed between two overlapping conductive films in this state, thereby The conductive film of the light source drive wiring 62a and the conductive film of the terminal 782a are soldered.

この実施形態によれば、前記副配線基板708における端子部708aの先端の両側に切り欠部782dが形成され、前記端子782aの導電膜の断面が露出している。このため、前記2つの導電膜の間に半田709を盛ると、図14Bに示すごとく、前記半田709は、前記端子部708aの切り欠部782dを覆って流れ、前記導電膜の幅と同じ幅で、且つ導電膜面から十分高い高さに形成される。   According to this embodiment, the notch 782d is formed on both sides of the tip of the terminal portion 708a in the sub wiring board 708, and the cross section of the conductive film of the terminal 782a is exposed. For this reason, when solder 709 is provided between the two conductive films, as shown in FIG. 14B, the solder 709 flows over the notch 782d of the terminal portion 708a and has the same width as the width of the conductive film. And at a sufficiently high height from the conductive film surface.

よって、この実施形態によれば、半田付け面積が増やすことができ、強度の強いハンダ付けが可能となる。   Therefore, according to this embodiment, the soldering area can be increased, and soldering with high strength can be performed.

このように、この実施形態の半田接続構造は、前記副配線基板708に形成された端子782aからなる第2の配線は、その断面が露出するように前記副配線基板708の先端が両側から円弧状に切除された切り欠部782dを有するので、強い強度のハンダ付けが可能となる。   As described above, in the solder connection structure of this embodiment, the tip of the sub wiring board 708 is circular from both sides so that the cross section of the second wiring composed of the terminals 782a formed on the sub wiring board 708 is exposed. Since the cutout portion 782d is cut out in an arc shape, it is possible to perform strong soldering.

(第9実施形態)
この発明の第9の実施形態について、図15を参照して説明する。この図15において、図15Aはこの第9の実施形態における副配線基板808の端子部808aを示す部分拡大図、図15Bはこの第9の実施形態における配線接続部6eを示す部分拡大図である。
尚、この実施形態において、上述した第1の実施形態と同一の部材には同一の符号を付し、説明を省略する。
(Ninth embodiment)
A ninth embodiment of the present invention will be described with reference to FIG. In FIG. 15, FIG. 15A is a partially enlarged view showing the terminal portion 808a of the sub-wiring board 808 in the ninth embodiment, and FIG. 15B is a partially enlarged view showing the wiring connecting portion 6e in the ninth embodiment. .
In this embodiment, the same members as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

この発明の第9の実施形態における半田接続構造は、図1乃至図5に示した第1の実施形態に用いられた前記主配線基板6における前記配線接続部6eの各光源駆動配線62aに、図15Aに示した副配線基板808の端子882aを接続したものであり、端子882aは、その先端に端面導電膜682cが設けられ、前記端子部808aの先端における導電膜が基板と共に円弧状に切り欠かかれている。   The solder connection structure according to the ninth embodiment of the present invention is provided on each light source drive wiring 62a of the wiring connection portion 6e in the main wiring board 6 used in the first embodiment shown in FIGS. The terminal 882a of the sub wiring board 808 shown in FIG. 15A is connected, and the terminal 882a is provided with an end face conductive film 682c at the tip thereof, and the conductive film at the tip of the terminal portion 808a is cut in an arc shape together with the substrate. It is missing.

すなわち、副配線基板808の端子部808aは、それぞれ前記光源駆動配線162aの導電膜の幅と等しい幅の導電膜からなる幅広部882aと、その端子882aの先端が前記端子部の両側から円弧上に切り欠部882dが形成され、先端の幅が狭くなった狭幅部882aと、前記端子部808aの先端の端面に、前記端子882aの先端と同じ幅で且つ前記端子882a及び光源駆動配線62と電気的に接続された端面導電膜882cとからなる端子882aとを備え、前記端子882aの導電膜の断面が前記切り欠部882dに露出するように形成されている。 That is, the terminal portion 808a of the sub-circuit board 808, a wide portion 882a 1, each formed of a conductive film having a width equal to the width of the conductive film of the light source drive wires 162a, arc leading end of the terminal 882a from both sides of the terminal portion are cut-out portions 882d cut in top form, the narrow portion 882a 2 of the width of the tip is narrowed, the end surface of the distal end of the terminal portion 808a, and the terminals 882a and light source driven with the same width as the tip of the terminal 882a A terminal 882a including an end face conductive film 882c electrically connected to the wiring 62 is provided, and a cross section of the conductive film of the terminal 882a is formed to be exposed to the notch 882d.

前記端子部808aの先端の端面に設けられる端面導電膜882cは、上述した第4の実施形態で述べたと同様に、前記副配線基板808の端子部808aの先端に無電界メッキによって形成される。そして前記切り欠部882dは、前記端子部808aの先端の両側を、前記端子882aの導電膜と共にポンチ等の工具により切断することによって形成される。   The end face conductive film 882c provided on the end face of the terminal portion 808a is formed by electroless plating at the end of the terminal portion 808a of the sub wiring board 808, as described in the fourth embodiment. The cutout portion 882d is formed by cutting both sides of the tip of the terminal portion 808a with a tool such as a punch together with the conductive film of the terminal 882a.

そして、前記配線接続部6eの前記光源駆動配線62aに、その幅に合わせて前記端子部808aの端子882aを配置し、その状態で重なり合う2つの導電膜の間に半田809を盛ることによって、前記光源駆動配線62aの導電膜と前記端子882aの導電膜とが半田付けされる。   Then, the terminal 882a of the terminal portion 808a is arranged in accordance with the width of the light source driving wiring 62a of the wiring connection portion 6e, and the solder 809 is placed between the two conductive films overlapping in this state. The conductive film of the light source drive wiring 62a and the conductive film of the terminal 882a are soldered.

この実施形態によれば、前記副配線基板808における端子部808aの先端の両側に切り欠部882dが形成され、前記端子882aの導電膜の断面が露出し、また、前記端子部808aの端子882aには、その先端に端面導電膜882cが形成されている。このため、前記2つの導電膜の間に半田809を盛ると、図15Bに示すごとく、前記半田809は、前記端子部808aの切り欠部882dを覆って流れ、前記導電膜の幅と同じ幅で、且つ導電膜面から十分高い高さに形成される。   According to this embodiment, the notch 882d is formed on both sides of the tip of the terminal portion 808a in the sub wiring substrate 808, the cross section of the conductive film of the terminal 882a is exposed, and the terminal 882a of the terminal portion 808a is exposed. Is formed with an end face conductive film 882c at its tip. Therefore, when solder 809 is provided between the two conductive films, as shown in FIG. 15B, the solder 809 flows over the notch 882d of the terminal portion 808a and has the same width as the width of the conductive film. And at a sufficiently high height from the conductive film surface.

よって、この実施形態によれば、半田付け面積が増やすことができ、強度の強いハンダ付けが可能となる。   Therefore, according to this embodiment, the soldering area can be increased, and soldering with high strength can be performed.

このように、この実施形態の半田接続構造は、前記副配線基板808に形成された端子882aからなる第2の配線は、前記副配線基板808の先端面に第2の配線と同じ幅に形成された端面導電膜882dを備えているので、強い強度のハンダ付けが可能となる。   Thus, in the solder connection structure of this embodiment, the second wiring composed of the terminals 882a formed on the sub wiring board 808 is formed on the front end surface of the sub wiring board 808 with the same width as the second wiring. Since the end face conductive film 882d is provided, it is possible to perform strong soldering.

(第10実施形態)
この発明の第10の実施形態について、図16A乃至図17を参照して説明する。この図16において、図16Aはこの第10の実施形態における半田接続構造を示す部分拡大図、図16Bは図16AのXVI−XVI線で切断して示す拡大断面図であり、図17はこの第10の実施形態における副配線基板906を展開して示す部分拡大図である。
尚、この実施形態において、上述した第1の実施形態と同一の部材には同一の符号を付し、説明を省略する。
(10th Embodiment)
A tenth embodiment of the present invention will be described with reference to FIGS. 16A to 17. In FIG. 16, FIG. 16A is a partially enlarged view showing the solder connection structure in the tenth embodiment, FIG. 16B is an enlarged sectional view taken along line XVI-XVI of FIG. 16A, and FIG. It is the elements on larger scale which expand and show sub wiring board 906 in ten embodiments.
In this embodiment, the same members as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

この発明の第10の実施形態における半田接続構造は、図1乃至図5に示した第1の実施形態に用いられた前記主配線基板6における前記配線接続部6eの各光源駆動配線62aに、図17に示した副配線基板908の端子982aを接続したものであり、前記副配線基板908の端子982aは、図16Bに示すように、その先端が折り返され、且つ導電膜の側面が基板と共に円弧状に切り欠かれている。   A solder connection structure according to the tenth embodiment of the present invention is provided on each light source drive wiring 62a of the wiring connection portion 6e in the main wiring board 6 used in the first embodiment shown in FIGS. The terminal 982a of the sub-wiring board 908 shown in FIG. 17 is connected. As shown in FIG. 16B, the terminal 982a of the sub-wiring board 908 has its tip folded back and the side surface of the conductive film together with the board. It is cut out in an arc shape.

すなわち、副配線基板908は、図17に示すように、端子部908aは、それぞれ前記光源駆動配線62aの導電膜の幅と等しい幅の導電膜が形成され、前記端子部908aの導電膜を保護するための保護膜983が除去されてなる複数の端子982aが形成され、その端子982aの両側にかかって円弧状に端子982aを切り欠いた切り欠部982dが形成され、前記端子982aの導電膜の断面が前記切り欠部982dに露出するように形成されている。そして、副配線基板908は、図17の二点鎖線984に沿って前記導電膜を外側にして折り曲げ、この折り曲げられた副配線基板908における端子部908aには、前記光源駆動配線62aの導電膜の幅と等しい幅の導電膜からなる幅広部982aと、先端の幅が狭くなった狭幅部982aとからなる端子982aが、前記光源駆動配線62aに接続される。なお、副配線基板908に対して主配線基板6が配置された側に、副配線基板908の保護膜983が配置されるように、副配線基板908を主配線基板6に接合してもよい。この場合、副配線基板908の配置が図16Bに示すものと比べて上下が入れ替わることとなる。 That is, as shown in FIG. 17, in the sub-wiring substrate 908, the terminal portion 908a is formed with a conductive film having a width equal to the width of the conductive film of the light source driving wiring 62a to protect the conductive film of the terminal portion 908a. A plurality of terminals 982a are formed by removing the protective film 983 to be formed, and notches 982d in which the terminals 982a are cut out in an arc shape are formed on both sides of the terminals 982a, and the conductive film of the terminals 982a is formed. Is formed so as to be exposed at the notch 982d. Then, the sub wiring substrate 908 is bent with the conductive film outward along the two-dot chain line 984 in FIG. 17, and the terminal portion 908a of the bent sub wiring substrate 908 has a conductive film of the light source driving wiring 62a. the wide portion 982a 1 formed of width equal to the width of the conductive film, the terminal 982a consisting of narrow portion 982a 2 Metropolitan the width of the tip is narrowed is connected to the light source drive wires 62a. The sub wiring board 908 may be bonded to the main wiring board 6 so that the protective film 983 of the sub wiring board 908 is arranged on the side where the main wiring board 6 is arranged with respect to the sub wiring board 908. . In this case, the arrangement of the sub-wiring board 908 is switched up and down compared to that shown in FIG. 16B.

前記端子部708aの先端の端面に形成される切り欠部982dは、図17に示した副配線基板908の二点鎖線984に沿って折り曲げ、その折り曲げ競れた端部は粘着材990によって互いに接着されている。この折り曲げられた端子部908aの先端の両側を、前記端子982aの導電膜と共にポンチ等の工具により切断することにより、あるいは、予め端子982aの両側にかかって円弧状に端子982aに切り欠部782dを形成し、その後、二点鎖線984に沿って折り曲げることによって形成されっている。   A notch 982d formed on the end face of the terminal portion 708a is bent along a two-dot chain line 984 of the sub wiring board 908 shown in FIG. It is glued. By cutting both ends of the bent terminal portion 908a with a tool such as a punch together with the conductive film of the terminal 982a, or in advance on both sides of the terminal 982a, a notch 782d is formed in the terminal 982a in an arc shape. And then bent along the two-dot chain line 984.

そして、前記配線接続部6eの前記光源駆動配線62aに、その幅に合わせて前記端子部908aの端子982aを配置し、その状態で重なり合う2つの導電膜の間に半田909を盛ることによって、前記光源駆動配線62aの導電膜と前記端子982aの導電膜とが半田付けされる。   Then, by arranging the terminal 982a of the terminal portion 908a in accordance with the width of the light source driving wiring 62a of the wiring connection portion 6e, and placing the solder 909 between two overlapping conductive films in that state, The conductive film of the light source drive wiring 62a and the conductive film of the terminal 982a are soldered.

この実施形態によれば、前記副配線基板908における端子部908aの先端を、導電膜を外側にして折り返し、その折り返した部分の先端の両側に、切り欠部982dが形成され、前記端子982aの導電膜の断面が露出している。このため、前記2つの導電膜の間に半田909を盛ると、図14Bに示すごとく、前記半田909は、前記端子部908aの導電膜と前記光源駆動配線62aの導電膜との間に前記半田909が流れて接続すると共に、切り欠部982dを覆って流れ、前記導電膜の幅と同じ幅で、且つ導電膜面から十分高い高さに形成される。   According to this embodiment, the tip of the terminal portion 908a in the sub-wiring board 908 is folded back with the conductive film facing outward, and notches 982d are formed on both sides of the tip of the folded portion, and the terminal 982a The cross section of the conductive film is exposed. For this reason, when solder 909 is provided between the two conductive films, as shown in FIG. 14B, the solder 909 is placed between the conductive film of the terminal portion 908a and the conductive film of the light source drive wiring 62a. 909 flows and connects, flows over the notch 982d, and is formed to have the same width as the conductive film and a sufficiently high height from the conductive film surface.

よって、この実施形態によれば、半田付け面積を増やすことができ、強度の強いハンダ付けが可能となる。したがって、上述した実施形態では、基板の片面に導電膜が形成された片面配線基板であっても、主配線基板と副配線基板の半田接合を、容易に且つ確実で強固にすることができる。   Therefore, according to this embodiment, it is possible to increase the soldering area and to perform soldering with high strength. Therefore, in the above-described embodiment, the solder joint between the main wiring board and the sub wiring board can be easily, surely and firmly strengthened even if the single-sided wiring board has a conductive film formed on one side of the board.

このように、この実施形態の半田接続構造は、前記副配線基板908は、その先端部で前記端子982aからなる第2の配線の導電膜を外側にして折り曲げられ、前記第2の配線は、前記曲げられた先端に前記導電膜が円弧状に切除された切り欠部982dが形成されているので、強い強度のハンダ付けが可能となる。   As described above, in the solder connection structure of this embodiment, the sub-wiring board 908 is bent with the conductive film of the second wiring composed of the terminal 982a at the front end thereof, and the second wiring is Since the notched portion 982d in which the conductive film is cut out in an arc shape is formed at the bent tip, it is possible to perform strong soldering.

1…表示素子、1a…延出部、1b…端子配列部、2…面光源、3…下ケース、4…上ケース、5…集積回路、6,106,206,306…主配線基板、6a…パターン形成面、6b…接続部、6c…接続端子、6d…端子群、6e,106e,206e,306e…配線接続部、61…絶縁性のフィルム、62,362…導電パターン、62a,162a,262a,362a…光源駆動配線(第1の配線)、63…保護膜、7…発光素子、8,108,308,408,508,608,708,808,908…副配線基板、8a,108a,308a,408a,508a,608a,708a,808a,908a…端子部、81…絶縁性のフィルム、82…導電パターン、82a,182a,382,482a,582a,682a,782a,882a,982a…端子(第2の配線)、82a,382b,482a,582a,782a,882a,982a,…幅広部、82a、162b,262b,362b,382b,482a,582a,682a,782a,882a,982a…狭幅部、83…保護膜、9,109,209,309,409,509,609,709,809,909,…半田、990…粘着材。 DESCRIPTION OF SYMBOLS 1 ... Display element, 1a ... Extension part, 1b ... Terminal arrangement part, 2 ... Surface light source, 3 ... Lower case, 4 ... Upper case, 5 ... Integrated circuit, 6,106,206,306 ... Main wiring board, 6a ... pattern forming surface, 6b ... connection part, 6c ... connection terminal, 6d ... terminal group, 6e, 106e, 206e, 306e ... wiring connection part, 61 ... insulating film, 62, 362 ... conductive pattern, 62a, 162a, 262a, 362a ... light source drive wiring (first wiring), 63 ... protective film, 7 ... light emitting element, 8, 108, 308, 408, 508, 608, 708, 808, 908 ... sub wiring board, 8a, 108a, 308a, 408a, 508a, 608a, 708a, 808a, 908a ... terminal portion, 81 ... insulating film, 82 ... conductive pattern, 82a, 182a, 382, 482a, 582a, 6 2a, 782a, 882a, 982a ... terminal (second wiring), 82a 1, 382b, 482a 1, 582a 1, 782a 1, 882a 1, 982a 1, ... wide portion, 82a 2, 162b, 262b, 362b, 382b , 482a 1 , 582a 1 , 682a 1 , 782a 1 , 882a 1 , 982a 1 ... Narrow portion, 83... Protective film, 9, 109, 209, 309, 409, 509, 609, 709, 809, 909,. 990 ... adhesive material.

Claims (4)

予め定めた幅を有する導電膜からなる第1の配線が形成された主配線基板上に、予め定めた幅を有する導電膜からなる第2の配線が形成された副配線基板が、前記第1の配線に前記第2の配線を対応させて配置され、前記第1の配線と前記第2の配線を半田により接続する半田接続構造において、
前記第1の配線と前記第2の配線が前記半田により接続される部分の、前記第1の配線と前記第2の配線の一方に、該一方の配線の幅を隣接する部分よりも狭くした狭幅部と、
前記第2の配線が形成された前記副配線基板は、前記主配線基板と接する前記副配線基板の先端端面に、前記第1の配線及び前記第2の配線と電気的に接続され、前記狭幅部よりも幅が広い端面導電膜と、
を備えることを特徴とする半田接続構造。
A sub-wiring board in which a second wiring made of a conductive film having a predetermined width is formed on the main wiring board on which a first wiring made of a conductive film having a predetermined width is formed is the first wiring board. In the solder connection structure in which the second wiring is arranged corresponding to the wiring, and the first wiring and the second wiring are connected by soldering,
The width of one of the first wiring and the second wiring of the portion where the first wiring and the second wiring are connected by the solder is narrower than the adjacent portion. A narrow part,
The sub-wiring board on which the second wiring is formed is electrically connected to the first wiring and the second wiring at a tip end surface of the sub-wiring board in contact with the main wiring board, and the narrow wiring board An end face conductive film having a width wider than the width portion;
A solder connection structure comprising:
前記狭幅部は、前記副配線基板の端に対応する前記第2の配線の部分に形成されたくびれ形状からなることを特徴とする請求項に記載の半田接続構造。 2. The solder connection structure according to claim 1 , wherein the narrow width portion has a constricted shape formed in a portion of the second wiring corresponding to an end of the sub wiring board. 前記狭幅部は、前記主配線基板の前記第1の配線に形成されていて、前記主配線基板の前記副配線基板に接する部分の前記第1の配線に形成されたくびれ形状からなることを特徴とする請求項1又は請求項2のいずれかに記載の半田接続構造。 The narrow width portion is formed in the first wiring of the main wiring board, and has a constricted shape formed in the first wiring in a portion of the main wiring board in contact with the sub wiring board. The solder connection structure according to claim 1 , wherein the solder connection structure is characterized. 表示素子と、前記表示素子を照明する面光源と、前記表示素子を駆動するための信号及び電圧を供給する第1の配線が形成された主配線基板と、前記面光源を駆動するための電流を供給する第2の配線が形成された副配線基板とを有し、請求項1乃至請求項3のいずれかに記載の半田接続構造を備えることを特徴とする表示装置。   A display element, a surface light source that illuminates the display element, a main wiring substrate on which a first wiring for supplying a signal and voltage for driving the display element is formed, and a current for driving the surface light source A display device, comprising: a sub-wiring substrate on which a second wiring for supplying the solder is formed, and comprising the solder connection structure according to claim 1.
JP2010064188A 2009-12-17 2010-03-19 Solder connection structure and display device having the same Expired - Fee Related JP5633164B2 (en)

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