1324499 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種軟性印刷電路板，特別是指一種軟 板具有開口之軟性印刷電路板。 【先前技術】1324499 IX. Description of the Invention: [Technical Field] The present invention relates to a flexible printed circuit board, and more particularly to a flexible printed circuit board having a flexible board having an opening. [Prior Art]
隨著資訊電子產品日趨輕薄短小，軟性印刷電路板 (Flexible Priming Circuit B〇ard; Fpc，簡稱軟板)具備質輕、 超薄、柔軟、可撓曲、形狀自由度大等優點，可在有限空 間及特殊雜的產品巾進行三度印立體轉，使產品符 合輕:薄、短、小之需求，已廣泛應用於筆記型電腦、液 晶顯示器、數位械、手機及許多消費性電子巾。軟板的 裝作’主要是以聚醯亞胺（p〇lyimide ’簡稱⑴薄膜做為 紐復上接著劑後與銅d接合成軟性銅结基板，此 基板經過電路顯影後即成為軟性印刷電路板。With the increasingly thin and light information electronic products, Flexible Priming Circuit B〇ard (FPC, referred to as soft board) has the advantages of light weight, ultra-thin, softness, flexibility, and large degree of freedom of shape. The space and the special miscellaneous product towel are three-dimensionally printed, which makes the product meet the requirements of light, thin, short and small. It has been widely used in notebook computers, liquid crystal displays, digital devices, mobile phones and many consumer electronic tissues. The soft board is mainly made of a flexible copper-bonded substrate which is bonded to the copper d by a p〇lyimide (1) film as a bonding agent, and the substrate becomes a flexible printed circuit after being developed by a circuit. board.
請同時參閱圖1A、圖1B與圖lc，係為習知軟性印 刷電路板正、反及剖面示意圖。軟性印刷電路板卜具有 -可撓曲的軟板1G，複數個導電線12設於軟板表面，各 導電線兩端具有-導電接點12G，―保翻14形成於軟板 表面且覆蓋所㈣導電線12，倾财有兩_ 16分別 供一對不同極性之導電接點12G顯露於外，其中，在各導 電接點12G上塗設—錫料銲塾，可供結合奸元件。 、:軟14印刷電路板1依需求被反折時，因軟板1〇與銲 同材質’即前者具有柔軟度，後者偏屬硬材，故 备導電線I2隨紐板1G產生f折時，應力容祕中在導 5 电線12與銲塾結合部位，進而造成斷裂。又軟性印刷電路 板在熱壓時因有絕緣薄膜隔絕造成不易熱壓，又因導熱不 易，使錫無法炫合以使電子元件和軟性印刷電路板的銲墊 連接，因此必須將單層板改為上下漏銅的兩層板，且必須 ，孔使熱壓時錫球可以散出，但這樣將會造成成本的提 问，且若是熱壓時出現錯誤會增加修補難度，造成維修不 易的狀況。 因此本發明針對上述之問題，提供一種可再使用之軟 性印刷電路板，藉由在軟板處有開口，使熱壓後連結度良 好且較易維修，又降低成本和提高重複使用性。 【發明内容】 本發明之主要目的係提供一可再利用之軟性印刷電路 板，藉由在軟板兩端各具有一開口，可使軟性印刷電路板 與電子元件連結度更佳，且維修容易並可重複使用。 基於上述目的，本發明係揭露一種軟性印刷電路板， 包括一可撓曲的軟板，複數個導電線設於該軟板表面，以 及—保護膜覆蓋於複數個導電線與軟板之上；其特徵在 =:軟性印刷電路板在兩端處各具有一開口區域，用以顯 露出部分複數個導躲，使複數個導電線彼此斷開，用以 做導電接點。 利用本發明所揭露之軟性印刷電路板，相較於先前技 術’不需於導電接點製作排錫孔，且因有加熱固片，可使 1324499 軟性印刷電路板強度加強， 裂且黏著性更佳，可增加其 優點。 能防止銅箔導線於反折時不斷 重複使用性，達到節省成本的 【實施方式】 本發明提供-種可再使用之軟性印刷轉板，藉由在 軟板處有開口 ’使熱壓後連結度良好且較錄修，又降低 ΐ本和提高紐使祕。為了使本發明之敘収加詳盡及 元備，晴參考下列描述並配合以下之圖式。 閱圖2Α、圖2Β與圖2C ’係為本發明一實施例 一軟性印刷電路板正面、反面及剖面示意圖。軟性印刷電 路板2 ’具有-可撓曲的軟板2〇，複數個導電線22設於軟 板20表面’各導電線22兩端具有—導電接點，—保護膜 24形成於軟板表面且駐财料魏22，保護膜％斑 軟板20各自具有兩開口區域％，且保護膜24盘軟板％ 的兩開〇區域形狀及位㈣相同，互相疊合形成兩開窗區 (26)，此兩職區係分別為—鏤空區域於軟性印刷電路板2 之兩端’使軟性印刷電路板2完成後分別提供兩端導電接 點220顯露於外’在各導電接點22〇上塗設-錫料銲墊， 又在保護膜接近軟酬σ(1域％處更包含有複數個加熱 固片28，使熱壓過程後可供連結電子元件。 其中’導電線22係為-銅箱製成；加熱固片係可選用 加熱後會S]化之材質’如：加驗會固化之鄉或快乾膠 等化學材料，使軟性印刷電路板2較不錢形，避免銅箱 7 1324499 導線22斷裂的問題。軟性印刷電路板2在製作開窗區時， 亦使導電線22之間彼此互相斷開，故不需再於導電線 上鑽排錫孔，也可以將熔化多餘的錫流出。 明參照圖2D，係為本發明另一實施例軟性印刷電路板 之反面示意圖。其結構係和圖2B相近，但其從開口區域 26至最外緣之軟性印刷電路板2於設計時做一延伸，使之 長度較圖2B中可恰好安置加熱固片之長度為長。如此， 軟性印刷電路板2在重複使用日寺，可防止因熱使銅箱脫落 且黏著性更佳，亦可以預關軟性印刷電路板2反折後， 銅箱會斷開之缺點；又在開口區域26附近有加熱固片28, 係利用加熱固片28加熱後會變硬之特點，使開口區域％ 上下兩端加熱後硬化’如此，軟性印刷電路板較不易變形， 可避免軟性印刷電路板反折時銅箔導線22斷裂的問題。 本發明所揭露之紐印刷電路板有下舰點··其不需 於導電接點製作排錫孔，因其導電接點位於開窗區域，使 各個導電線之間互相斷開利於騎^錫的流出；又有加熱 固片’利用其加熱後固化之特性’可使軟性印刷電路板強 度加強，能避免反折時銅箔導線斷裂且黏著性更佳，可增 加其重複使用性’達到節省成本的優點。 本發明雖以較佳實施侧明如上，然其並非用以限定 本發明精神及本發明實體僅止於上述實施姻。是以，任 8 【圖式簡單說明】 、藉由以下詳細之描述結合所附圖式，將可輕易 述内容及此項發明之諸乡伽，其t: 、 圖1A係為習知—軟性電路板之正面示意圖丨 圖1B係為習知一軟性電路板之反面示意圖； 圖1C係為習知—紐電路板之剖面示意圖； 圖Μ係為本發明—實施例軟性電路板之正面示意圖； 圖2Β係為本發明一實施例軟性電路板之反面示意圖； 意 圖 圖2C係為本發明一實施例軟性電路板之剖面示 以及 圖 圖2D係為本發明另一實施例軟性電路板之反面示意 【主要元件符號說明】 16保護獏開口 26開口區域 28加熱固片 1、2軟性印刷電路板 10、20軟板 1324499 12、22導電線 14、24保護膜 120、220導電接點Please refer to FIG. 1A, FIG. 1B and FIG. 1c as a schematic diagram of the forward, reverse and cross-section of the conventional soft printed circuit board. The flexible printed circuit board has a flexible flexible board 1G, and a plurality of conductive lines 12 are disposed on the surface of the flexible board, and each of the conductive lines has a conductive contact 12G at both ends thereof, and the protective layer 14 is formed on the surface of the flexible board and covers the surface. (4) The conductive wire 12 has two _ 16 for a pair of conductive contacts 12G of different polarities respectively, wherein a solder joint is applied on each of the conductive contacts 12G for the purpose of combining the components. :: When the soft 14 printed circuit board 1 is folded back according to the requirements, the soft board 1〇 and the soldering material are the same as the former, and the latter is soft, so the conductive line I2 is f-folded with the new board 1G. In the stress tolerance, the joint between the wire 5 and the weld bead is caused, and the fracture is caused. Moreover, the flexible printed circuit board is not easily hot pressed due to the insulation film insulation during hot pressing, and the heat conduction is not easy, so that the tin cannot be dazzled to connect the electronic component and the solder pad of the flexible printed circuit board, so the single layer board must be changed. It is a two-layer board that leaks copper up and down, and it must be such that the solder balls can be dissipated during hot pressing, but this will cause cost problems, and if the error occurs during hot pressing, the repairing difficulty will be increased, resulting in a difficult maintenance condition. SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and provides a reusable flexible printed circuit board which has a good opening and a relatively easy maintenance after hot pressing by opening at the soft board, which reduces cost and improves reusability. SUMMARY OF THE INVENTION The main object of the present invention is to provide a reusable flexible printed circuit board. By having an opening at each end of the flexible board, the flexible printed circuit board can be connected to the electronic component better, and the maintenance is easy. It can be reused. Based on the above object, the present invention discloses a flexible printed circuit board comprising a flexible flexible board, a plurality of conductive lines disposed on the surface of the flexible board, and a protective film covering the plurality of conductive lines and the soft board; The feature is that the soft printed circuit board has an open area at both ends for exposing a plurality of conductive guides, so that the plurality of conductive wires are disconnected from each other for use as conductive contacts. By using the flexible printed circuit board disclosed in the present invention, compared with the prior art, the tin-free hole is not required to be formed on the conductive contact, and the heat-resistant solid film can strengthen the strength of the 1324499 flexible printed circuit board, and the crack and adhesion are further improved. Good, can increase its advantages. The utility model can prevent the copper foil wire from being repeatedly reusable in the case of re-folding, thereby achieving cost saving. [Embodiment] The present invention provides a reusable soft printing rotary plate which is connected by hot pressing after opening at the soft plate Good and relatively recorded, reducing the cost and improving the secret. In order to add the details of the present invention to the details, please refer to the following description and the following drawings. 2A, 2B and 2C are schematic views of the front, back and cross-sections of a flexible printed circuit board according to an embodiment of the present invention. The flexible printed circuit board 2' has a flexible flexible board 2', and a plurality of flexible lines 22 are provided on the surface of the flexible board 20, 'the conductive lines 22 have conductive contacts at both ends, and the protective film 24 is formed on the surface of the flexible board. And the protective material Wei 22, the protective film% plaque soft plate 20 each has two open area %, and the shape of the two open areas of the protective film 24 disk soft board % and the position (4) are the same, and overlap each other to form two open window areas (26 ), the two faculties are respectively - the hollowed out area is on both ends of the flexible printed circuit board 2, so that after the flexible printed circuit board 2 is completed, the two ends of the conductive contacts 220 are respectively exposed and exposed on the respective conductive contacts 22' The tin-pad is provided with a solder pad, and the protective film is close to the softness σ (1 domain% further includes a plurality of heating fins 28, so that the electronic component can be connected after the hot pressing process. Among them, the conductive wire 22 is - copper The box is made; the heating solid part can be selected by heating the material after the heating, such as: the chemical curing material such as the curing or the quick-drying glue, so that the soft printed circuit board 2 is less expensive, avoiding the copper box 7 1324499 The problem of wire 22 breaking. The flexible printed circuit board 2 also guides when making the window opening area. The wires 22 are disconnected from each other, so that it is not necessary to drill the tin holes on the conductive wires, and the molten tin can be melted out. Referring to FIG. 2D, it is a schematic view of the reverse side of the flexible printed circuit board according to another embodiment of the present invention. The structure is similar to that of Fig. 2B, but the flexible printed circuit board 2 from the opening region 26 to the outermost edge is extended in design so that the length is longer than the length in Fig. 2B where the heating film can be placed. In this way, the flexible printed circuit board 2 can prevent the copper box from falling off due to heat and has better adhesion, and can also pre-close the disadvantage that the copper box will be broken after the flexible printed circuit board 2 is folded back; In the vicinity of the opening area 26, there is a heating solid sheet 28, which is characterized in that it is hardened by heating by the heating sheet 28. The upper and lower ends of the opening area are heated and hardened. Thus, the flexible printed circuit board is less susceptible to deformation, and the flexible printed circuit can be avoided. The problem that the copper foil wire 22 breaks when the plate is folded back. The printed circuit board disclosed in the present invention has a lower ship point. It does not need to make a tin-plated hole in the conductive contact, because the conductive contact is located in the window opening area, so that the conductive contact is located in the window opening area. Individual conduction The disconnection between the lines facilitates the outflow of the tin; the heating of the solid sheet 'using the characteristics of heating and curing' can enhance the strength of the flexible printed circuit board, avoiding the breakage of the copper foil wire and the better adhesion when the folding is reversed. The invention can increase the reusability of the invention to achieve the cost-saving advantages. The present invention is not limited to the spirit of the present invention, and the present invention is not limited to the above-mentioned implementation. BRIEF DESCRIPTION OF THE DRAWINGS With reference to the following detailed description in conjunction with the drawings, the description of the invention and the invention of the invention can be readily described, and FIG. 1A is a schematic diagram of a conventional circuit board. 1B is a schematic view of a reverse side of a conventional flexible circuit board; FIG. 1C is a schematic cross-sectional view of a conventional circuit board; FIG. 1 is a front view of the flexible circuit board of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 2C is a cross-sectional view of a flexible circuit board according to an embodiment of the present invention and FIG. 2D is a reverse view of a flexible circuit board according to another embodiment of the present invention. The main protective element SIGNS LIST 16 opening 26 opening region 28 Tapir heating solid sheet of conductive lines 12 and 22 1324499 1 the flexible printed circuit board FPC 10 and 20 conductive contacts 14, 24, 120, 220, the protective film