I2453〇6 九、發明說明： 【發明所屬之技術領域】 本毛明係有關—種冷陰極管之電極及其製法，特別指 η㈣極係利用粉末冶金及射出成型的技術， Μ ^供一體成型的結構。 【先前技術】 意古冷陰極f由於具有燈管細小’燈管溫度低，燈管表面 Γ问’使用*命長··.等優點，目前已廣泛應用於電腦掃描 =、傳真機、液晶勞幕背光模組、或廣告燈箱中。轉光 2理乃是湘管㈣極放，好與水銀料發生碰 ^銀原子受激發輻射出紫外光，紫外光激發塗佈於管 土之螢光粉而產生可見光。 ，著改善冷陰極管電極的壽命及燈管的啟動特性，請 弟圖為種先鈾技術之冷陰極管的剖面圖，該電 有一電極導絲9 2以溶接方式黏固於-杯狀放電 9 4，忒電極導絲9 2通常包括兩段，第一段9 2 2係 連接於該放電部9 4、及第二段9 2 4係連接第—段9 2 2於電線。第一段為低膨脹係數（CTE)合金，為著容^與玻 =結合，目前通常使用Kovar合金（鎳鐵鈷合金），第二段通 吊以Invar合金（鎳鐵合金）。該杯狀放電部9 4通常以钥戋 嫣合金平板經沖壓成型而製成。其缺點為·· 一、電極導絲9 2直徑小（約0· 4mm)，不易溶接於該 杯狀放電部9 4，不僅製造麻煩並且容易斷裂。 1245306 请芩閱第二圖，為本發明之冷陰極管之電極製法 ' 私圖。該冷陰極管之電極製法之核心技術乃是利用粉束二 金，至少包括有四個步驟：混合步驟1 0、成型步驟2 〇/〇 熱處理步驟3 0、及沖壓步驟4 0。 、忒混合步驟10乃是混合金屬粉末及黏結劑以形成〜 混合料；該金屬粉末較佳乃是高熔點金屬，通常較佳乃二 於2〇〇〇C的金屬。該金屬粉末可以為鎢（W)、銦（M〇)、巧 二j鉬合金、或Kovar合金（以預合金粉較佳），因為鳥 粉;‘::二刪高溫。其中較佳可以用錮的金ΐ 造成本。^It較高’需較大的加溫溫度，而提高= 其中=亥金屬粉末只要是可以作為電極的材料即^ 不限.Γίί末愈細愈好，通f糊㈣以下，然而並 空隙，使M j粉末愈細則具有較A表面錢少相— 少加更緊密堆積’更容易燒結結合，可以減 響燒姓體/所需的時間。金屬粉末顆粒的尺寸不但影 :的进度，而且影響其性能，因為粉末越細， 比表面摊ΪΓspeciiicsurfacearea)越大，而大的 以黏結該非常重要的作用。姉結劑主要是用 合劑(例如為:以是一種高分子黏結劑，或有機黏 ^〗如為熱可塑性樹脂或蠟）。 混合;Γ,=:10中進一步可以利用-機以藏煉該 形的原料/屬粉末無結劑加熱混煉製成混合物作為成 在°亥成型步驟2 0中，本發明主要係利用射出成形的 1245306 =明/主要乃是利用金屬粉末射出成型的技術。由於未發明 技術，4冷陰極官之電極的外型可以更容易變化，以辦 力j其放電的面積。請參閱第三圖，為本發明之冷陰极管二 電極第-實施例之立體圖。該冷陰極管之電極i包括 ^部1 2及一放電部14 ’該放電部14略呈杯狀且與該 ¥線部-體成型。其巾該導線部i 2及該放電部丨4 -種金屬製成’並且具有金屬燒結的結構，因此不需要瘦 過焊接的步驟。該導線部1 2及該放電部i 4不會產生裂 痕，具有較佳的結構強度。請參㈣四圖，為本發明之^ 陰極管之電極第二實_之謂圖。由於本發明的冷陰極 官之電極製法，其中該放電部i 4 a可以容易地設計成具 有複數由其表面凸出的尖端142、144，以增加該電 極1的放電面積。本實施例為—較佳實施例，該尖端丄4 2、144乃由該放電部143的外圍及内壁面凸出。也 可以設計成只具有由該放電部i 4 a的外圍向外凸出的該 尖端142，或者只具有由該放電部i 4a的内壁面向内 凸出該尖端14 4。 請參閱第五圖，為本發明之冷陰極管之電極第三實施 例之立體圖。其中該放電部1 4 b的直徑乃與該導線部丄 2 b相同，藉此該放電部！ 4 b可具有較強的結構。 因此藉本發明所能產生之特點及功能經整理如后： -、電極的該導線部與該放電部藉由燒結—體成变， 不易斷裂。 -電極由㈤材料製成，具有相同的熱膨服係數， 1245306 不會因溫度急劇變化而產生間隙。 厶b ML· 三、該放電部形狀容易變化以增加放電 可降低耗電。 ㈣㈣法可大量並快速生產，可提高產能。 =所述，树时符合糾專叙要件，依法提出 惟以上所揭露者’僅為本發明較佳實施例而已，自 所做之均等變化或修飾，仍屬本發明所 === =查委讀冗細審，並盼早日料專仙勵發明，實感^ 【圖式簡單說明】 第一圖為先前技術之冷陰極管的剖面圖。 第二圖為本發明之冷陰極管之電極製i的流程圖。 第二圖為本發明之冷陰極管之 ^ /；L ° 第四圖為本發明之冷陰極管.例之立體圖 第五圖為本發明之冷陰極管=二實施例之立體圖 【主要元件符號說明】 1二實_之立體圖 〔習知〕 電極 9 放電部 9 4 電極導絲 92 〔本發明〕I2453〇6. Description of the invention: [Technical field to which the invention belongs] This Maoming is related to a kind of cold cathode tube electrode and its manufacturing method, especially the η㈣ electrode system uses powder metallurgy and injection molding technology. Structure. [Prior technology] Because of the advantages of the thin lamp tube, "low lamp temperature, lamp surface Γ", "use * life ...", the ancient cold cathode f has been widely used in computer scanning, fax machines, LCD labor, etc. Screen backlight module, or advertising light box. The principle of light conversion is the extremely high voltage of the Xiang tube, which can collide with the mercury material. The silver atoms are excited to emit ultraviolet light. The ultraviolet light excites the fluorescent powder coated on the soil and generates visible light. In order to improve the life of the cold cathode tube electrode and the start-up characteristics of the lamp, the picture is a cross-sectional view of a cold cathode tube of the first uranium technology. The electrode has an electrode guide wire 92 that is fixed to the cup-shaped discharge by welding. 9 4. The samarium electrode guide wire 9 2 usually includes two sections. The first section 9 2 2 is connected to the discharge section 9 4 and the second section 9 2 4 is connected to the first section 9 2 2 to the electric wire. The first section is a low expansion coefficient (CTE) alloy. For the purpose of combining ^ and glass =, Kovar alloy (nickel-iron-cobalt alloy) is currently used. In the second section, Invar alloy (nickel-iron alloy) is used. The cup-shaped discharge portion 94 is usually made of a key alloy flat plate by stamping. The disadvantages are: 1. The electrode guide wire 92 has a small diameter (approximately 0.4 mm) and is not easily dissolved in the cup-shaped discharge portion 94, which is not only troublesome to manufacture but also easily broken. 1245306 Please read the second picture, which is the private picture of the method for manufacturing the cold cathode tube electrode according to the present invention. The core technology of the cold-cathode tube electrode manufacturing method is to use powder bundles of two metals, including at least four steps: a mixing step 10, a molding step 2 0 / 〇 heat treatment step 30, and a stamping step 40. The mixing step 10 is to mix a metal powder and a binder to form a mixture; the metal powder is preferably a high melting point metal, and usually a metal of 2,000 ° C or more. The metal powder may be tungsten (W), indium (M0), Koji molybdenum alloy, or Kovar alloy (preferably pre-alloyed powder), because bird powder; Among them, it is preferable to use 锢 gold ΐ to make money. ^ It's higher 'needs a larger heating temperature, and the increase = Where = metal powder as long as it can be used as an electrode material ^ Unlimited. Γίί The finer the finer, the following f paste, but with voids, Make the M j powder more detailed than the A surface with less phase-less plus tighter packing 'is easier to sinter and combine, which can reduce the burning time / required time. The size of the metal powder particles not only affects the progress, but also affects its performance, because the finer the powder, the larger the specific surface area, and the larger it is for the very important role of bonding. The coupling agent is mainly a mixture (for example, it is a polymer adhesive, or an organic adhesive, such as a thermoplastic resin or wax). Mixing; Γ, =: 10 can further use the-machine to condense the shape of the raw materials / powder-free non-caking agent heating and kneading to make a mixture as a forming process in the ° Hai molding step 20, the present invention mainly uses injection molding 1245306 = Ming / Ming mainly uses metal powder injection molding technology. Because the technology has not been invented, the shape of the cold cathode electrode can be changed more easily to handle the area of its discharge. Please refer to the third figure, which is a perspective view of the second embodiment of the second electrode of the cold cathode tube of the present invention. The electrode i of the cold cathode tube includes a portion 12 and a discharge portion 14 ′. The discharge portion 14 is slightly cup-shaped and is formed integrally with the wire portion. Since the wire portion i 2 and the discharge portion 4 are made of a metal 'and have a sintered metal structure, a step of thinning and soldering is not required. The lead portion 12 and the discharge portion i 4 do not generate cracks, and have better structural strength. Please refer to the four figures, which are the second embodiment of the cathode electrode of the present invention. Due to the cold cathode electrode manufacturing method of the present invention, the discharge portion i 4 a can be easily designed to have a plurality of tips 142, 144 protruding from its surface to increase the discharge area of the electrode 1. This embodiment is a preferred embodiment, the tips 丄 4, 144 are protruded from the periphery and the inner wall surface of the discharge portion 143. It may also be designed to have only the tip 142 protruding outward from the periphery of the discharge portion i 4a, or to have only the tip 14 4 protruding inward from the inner wall surface of the discharge portion i 4a. Please refer to the fifth figure, which is a perspective view of the third embodiment of the electrode of the cold cathode tube of the present invention. The diameter of the discharge portion 1 4 b is the same as the diameter of the lead portion 丄 2 b, and thus the discharge portion! 4 b may have a strong structure. Therefore, the features and functions that can be generated by the present invention are organized as follows:-The lead portion of the electrode and the discharge portion are changed by sintering and are not easily broken. -The electrode is made of rhenium material and has the same thermal expansion coefficient. 1245306 will not cause gaps due to rapid temperature changes.厶 b ML. Third, the shape of the discharge section is easy to change to increase the discharge and reduce power consumption. The method can be produced in large quantities and quickly, which can increase the production capacity. = As mentioned, the tree time is in line with the rectification requirements. According to the law, it is only disclosed that the above is only the preferred embodiment of the present invention. Since the equal changes or modifications have been made, they still belong to the present invention. Read the detailed review, and look forward to the early invention of Xianli invention, real sense ^ [Schematic description] The first picture is a sectional view of the cold cathode tube of the prior art. The second figure is a flowchart of the electrode system i of the cold cathode tube of the present invention. The second figure is the cold cathode tube of the invention ^ /; L ° The fourth figure is the cold cathode tube of the invention. Example perspective view The fifth figure is the cold cathode tube of the invention = two embodiments of the perspective view [main component symbols Description] A three-dimensional view of the two real_ [known] electrode 9 discharge part 9 4 electrode guide wire 92 [present invention]
混合步驟 1 Q 成型步驟 20 10 1245306 熱處理步驟 3 0 沖壓步驟 4 0 電極 1 、1 a 、 1 b 導線部 1 2、 12 b 放電部 1 4、 14 a 、1 4 b 尖端 1 4 2 、1 4 4Mixing step 1 Q Molding step 20 10 1245306 Heat treatment step 3 0 Stamping step 4 0 Electrode 1, 1 a, 1 b Lead portion 1 2, 12 b Discharge portion 1 4, 14 a, 1 4 b Tip 1 4 2, 1 4 4
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