200913845 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種攜帶型電子裝置機殼及其製造方法，尤 其係涉及一種鋁合金攜帶型電子裝置機殼及其製造方法。 【先前技術】 隨著移動通訊技術之發展，攜帶型電子裝置變得越來越 輕薄短小以滿足使用者舒適及方便之使用需求。鋁合金具有 質量輕及質地優良等特點而被廣泛用於製造攜帶型電子裝 置機殼，即鋁合金攜帶型電子裝置機殼。 目前，鋁合金攜帶型電子裝置機殼之保護膜層主要係陽 極氧化膜層。陽極氧化膜層係由陽極氧化所獲得。 惟，所述陽極氧化膜層硬度較低，其與基體之結合力亦 較低，一般為HV400〜600之間。除此之外，陽極氧化膜層 還具有耐磨性能及防腐性能較為有限等缺點。因此，於曰常 使用過程中，陽極氧化膜層較易脫落及被腐蝕，進而影響到 鋁合金攜帶型電子裝·置機殼之使用壽命。另，由於陽極氧化 於鋁合金攜帶型電子裝置機殼之表面處理中已經應用得過 於普遍而不能較大地激起消費者之購買欲望。 【發明内容】 有鑒於此，有必要提供一種使用壽命較長之鋁合金攜帶 型電子裝置機殼。 還有必要提供一種所述鋁合金攜帶型電子裝置機殼之 製造方法。 一種鋁合金攜帶型電子裝置機殼，其包括一鋁合金基層 6 200913845 及一覆蓋於鋁合金基層上之微弧氧化膜層。 一種製造所述鋁合金攜帶型電子裝置機殼之製造方法 包括如下步驟： 對铭合金基層預處理； 將銘合金基層進行微弧氧化處理，於銘合金基層表面形 成微弧氧化膜層，形成所述鋁合金攜帶型電子裝置機殼； 清洗及烘乾鋁合金攜帶型電子裝置機殼。 相較於習知技術，所述鋁合金攜帶型電子裝置機殼之表 面處理方法採用了微弧氧化技術於鋁合金攜帶型電子裝置 機殼之表面形成一微弧氧化膜層，從而有效地改善了鋁合金 攜帶型電子裝置機殼之耐磨及耐腐蝕性能，延長了鋁合金攜 帶型電子裝置機殼之使用壽命，並能較大地激起消費者之購 買欲望。 【實施方式】 請參閱圖1及圖2所示本發明鋁合金攜帶型電子裝置機 殼之較佳實施例，該鋁合金攜帶型電子裝置機殼10包括一鋁 合金基層11及一覆蓋於鋁合金基層11上之微弧氧化膜層 12。該微弧氧化膜層12係鋁合金攜帶型電子裝置機殼10經微 弧氧化處理後於其表面形成之一保護層。該微弧氧化膜層12 係一陶瓷層，其厚度大致為8〜20微米。該微弧氧化膜層12具 有陶瓷質手感，其硬度高，耐腐蝕及耐磨性亦較好，用於防 止鋁合金基層11被磨損及腐蝕，從而實現對鋁合金基層11之 有效保護。 請參閱圖3，製造所述鋁合金攜帶型電子裝置機殼10 200913845 時，需用到一微弧氧化裝置20。該微弧氧化裝置20包括一高 壓電源21、氧化液槽22、一電極24及複數導線25。 該高壓電源21可以產生一直流脈衝電壓。該直流脈衝電 壓之電壓值為600伏〜650伏。 該氧化液槽22用於盛放一微弧氧化溶液26。在本實施例 中，該微弧氧化溶液26為鹼性電解溶液，其PH值為8〜12。該 微弧氧化溶液26按重量比包括六偏磷酸鈉（l〇g/l〜20gA)、矽 酸鈉（5g/l〜l〇gd )、鉬酸鈉（i〇g/i〜i5g/l)、碳酸納（5g/l~8gM ) 及鶴艘納（2g/l〜5g/l)。 該銘合金攜帶型電子裝置機殼10通過導線25與高壓電 源21之正極電連接而作為該微弧氧化裝置2〇之陽極。 該電極24可以為一不銹鋼板，其通過導線25電連接於高 壓電源21之負極而作為該微弧氧化裝置20之陰極。’ 請參閱圖4，利用該微弧氧化裝置20製造鋁合金攜帶型 電子裝置機殼10之步驟如下： 對鋁合金基層11用酒精或丙酮去油並用清水清洗； 將鋁合金基層11浸入微弧氧化溶液26中並電連接於高 壓電源21之正極； 開通向壓電源21進行微弧乳化’微弧氧化之起弧電壓為 50〜350伏，電流密度之範圍為3〜5 A/dm2 ’處理時間為 分在里’如此可以得到厚度為8〜20微米之微弧氧化膜層12，從 而形成所述鋁合金攜帶型電子裝置機殼10; 取出鋁合金攜帶型電子裝置機殼10，並進行清洗及太共 $ί0 200913845 可以理解，該微弧氧化膜層12之表面還可塗覆一裝飾 層，如漆膜，如此，更進一步增強了對铭合金基層11之防護 作用，又能使得鋁合金攜帶型電子裝置機殼10更加美觀。 所述鋁合金攜帶型電子裝置機殼之表面處理方法採用 了微弧氧化技術於鋁合金攜帶型電子裝置機殼之表面形成 一陶瓷層，從而有效地改善了鋁合金攜帶型電子裝置機殼之 耐磨及耐腐蝕性能，延長了鋁合金攜帶型電子裝置機殼之使 用壽命，而且由於微弧氧化技術係較先進之金屬表面處理方 法，將該技術應用於鋁合金攜帶型電子裝置機殼之表面處理 上能夠較大地激起消費者之購買欲望。 綜上所述，本發明符合發明專利要件，爰依法提出專利 申請。惟，以上所述者僅為本發明之較佳實施例，本發明之 範圍並不以上述實施例為限，舉凡熟悉本案技藝之人士援依 本發明之精神所作之等效修飾或變化，皆應涵蓋於以下申請 專利範圍内。 【圖式簡單說明】‘ 圖1係本發明鋁合金攜帶型電子裝置機殼之較佳實施例 之立體結構不意圖； 圖2係圖1所示之鋁合金攜帶型電子裝置機殼之II-II之剖 示圖； 圖3係本發明鋁合金攜帶型電子裝置機殼之表面處理方 法之微弧氧化裝置之結構示意圖；. 圖4係本發明鋁合金攜帶型電子裝置機殼之表面處理方 法之工藝流程圖。 9 200913845 .【主要元件符號說明】 (本發明） 鋁合金攜帶型電子裝置機殼 10 鋁合金基層 11 氧化膜層 12 微弧氧化裝置 20 高壓電源 21 氧化液槽 22 電極 24 導線 25 微弧氧化溶液 26 10200913845 IX. Description of the Invention: The present invention relates to a portable electronic device casing and a method of manufacturing the same, and more particularly to an aluminum alloy portable electronic device casing and a method of manufacturing the same. [Prior Art] With the development of mobile communication technology, portable electronic devices have become more and more light and thin to meet the user's comfortable and convenient use requirements. Aluminum alloys are widely used in the manufacture of portable electronic device casings, such as aluminum alloy portable electronic device casings, because of their light weight and excellent texture. At present, the protective film layer of the aluminum alloy portable electronic device casing is mainly an anodic oxide film layer. The anodized film layer is obtained by anodization. However, the anodized film layer has a low hardness and a low bonding force with the substrate, and is generally between HV400 and 600. In addition, the anodized film layer also has shortcomings such as wear resistance and limited corrosion resistance. Therefore, during the use of the crucible, the anodized film layer is more likely to fall off and corrode, thereby affecting the service life of the aluminum alloy portable electronic device. In addition, since the anodizing has been applied to the surface treatment of the aluminum alloy portable electronic device casing, it has become too popular to stimulate the consumer's desire to purchase. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide an aluminum alloy portable electronic device casing having a long service life. It is also necessary to provide a method of manufacturing the casing of the aluminum alloy portable electronic device. An aluminum alloy portable electronic device casing comprises an aluminum alloy base layer 6 200913845 and a micro-arc oxidation film layer covering the aluminum alloy base layer. A manufacturing method for manufacturing the casing of the aluminum alloy portable electronic device comprises the following steps: pre-treating the base layer of the alloy; micro-arc oxidation treatment of the base layer of the alloy, forming a micro-arc oxidation layer on the surface of the base layer of the alloy, forming a The aluminum alloy portable electronic device casing; cleaning and drying the aluminum alloy portable electronic device casing. Compared with the prior art, the surface treatment method of the aluminum alloy portable electronic device casing adopts the micro-arc oxidation technology to form a micro-arc oxide film layer on the surface of the aluminum alloy portable electronic device casing, thereby effectively improving The wear resistance and corrosion resistance of the aluminum alloy portable electronic device casing prolongs the service life of the aluminum alloy portable electronic device casing, and can greatly stimulate the consumer's desire to purchase. [Embodiment] Please refer to the preferred embodiment of the aluminum alloy portable electronic device casing of the present invention shown in FIG. 1 and FIG. 2, the aluminum alloy portable electronic device casing 10 includes an aluminum alloy base layer 11 and a cover layer of aluminum. A micro-arc oxidation film layer 12 on the alloy base layer 11. The micro-arc oxide film layer 12 is an aluminum alloy portable electronic device casing 10 which is subjected to micro-arc oxidation treatment to form a protective layer on the surface thereof. The micro-arc oxide film layer 12 is a ceramic layer having a thickness of approximately 8 to 20 μm. The micro-arc oxide film layer 12 has a ceramic hand feeling, and has high hardness, corrosion resistance and wear resistance, and is used for preventing the aluminum alloy base layer 11 from being worn and corroded, thereby realizing effective protection of the aluminum alloy base layer 11. Referring to FIG. 3, when manufacturing the aluminum alloy portable electronic device casing 10 200913845, a micro-arc oxidation device 20 is required. The micro-arc oxidation device 20 includes a high voltage power source 21, an oxidizing solution tank 22, an electrode 24, and a plurality of wires 25. The high voltage power source 21 can generate a DC pulse voltage. The DC pulse voltage has a voltage value of 600 volts to 650 volts. The oxidizing solution tank 22 is for holding a micro-arc oxidation solution 26. In the present embodiment, the micro-arc oxidation solution 26 is an alkaline electrolytic solution having a pH of 8 to 12. The micro-arc oxidation solution 26 comprises sodium hexametaphosphate (l〇g/l~20gA), sodium citrate (5g/l~l〇gd), sodium molybdate (i〇g/i~i5g/l) by weight ratio. ), sodium carbonate (5g / l ~ 8gM) and crane ship (2g / l ~ 5g / l). The casing alloy portable electronic device casing 10 is electrically connected to the positive electrode of the high voltage power source 21 via a wire 25 as an anode of the microarc oxidation device. The electrode 24 may be a stainless steel plate electrically connected to the negative electrode of the high voltage power source 21 through the wire 25 as the cathode of the micro-arc oxidation device 20. Referring to FIG. 4, the steps of manufacturing the aluminum alloy portable electronic device casing 10 by using the micro-arc oxidation device 20 are as follows: the aluminum alloy base layer 11 is degreased with alcohol or acetone and washed with water; the aluminum alloy base layer 11 is immersed in the micro-arc The oxidizing solution 26 is electrically connected to the positive electrode of the high-voltage power source 21; the micro-arc emulsification of the micro-arc oxidation to the piezoelectric power source 21 is performed, and the arcing voltage is 50 to 350 volts, and the current density ranges from 3 to 5 A/dm2. The time is in the middle, so that the micro-arc oxide film layer 12 having a thickness of 8 to 20 micrometers can be obtained, thereby forming the aluminum alloy portable electronic device casing 10; taking out the aluminum alloy portable electronic device casing 10, and performing Cleaning and too much $ί0 200913845 It can be understood that the surface of the micro-arc oxidation film layer 12 can also be coated with a decorative layer, such as a paint film, thus further enhancing the protection of the alloy base layer 11 and enabling aluminum. The alloy portable electronic device casing 10 is more beautiful. The surface treatment method of the aluminum alloy portable electronic device casing adopts a micro-arc oxidation technology to form a ceramic layer on the surface of the aluminum alloy portable electronic device casing, thereby effectively improving the casing of the aluminum alloy portable electronic device. Wear and corrosion resistance, prolonging the service life of the aluminum alloy portable electronic device casing, and because the micro-arc oxidation technology is a more advanced metal surface treatment method, the technology is applied to the aluminum alloy portable electronic device casing. The surface treatment can greatly stimulate the consumer's desire to purchase. In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a preferred embodiment of an aluminum alloy portable electronic device casing of the present invention; FIG. 2 is a second embodiment of the aluminum alloy portable electronic device casing shown in FIG. FIG. 3 is a schematic structural view of a micro-arc oxidation device for surface treatment of an aluminum alloy portable electronic device casing according to the present invention; FIG. 4 is a surface treatment method for an aluminum alloy portable electronic device casing of the present invention; Process flow chart. 9 200913845 . [Main component symbol description] (Invention) Aluminum alloy portable electronic device casing 10 Aluminum alloy base layer 11 Oxide film layer 12 Micro-arc oxidation device 20 High-voltage power supply 21 Oxidation liquid tank 22 Electrode 24 Conductor 25 Micro-arc oxidation solution 26 10