(1) 1311334 九、發明說明 [發明所屬之技術領域】 本發明係提供一種冷陰極放電管用電極，特別是有關 一種具有耐濺鍍性且高壽命的冷陰極放電管用電極及具備 該冷陰極放電管用電極之冷陰極放電管用電極組裝體。 【先前技術】 以往，廣泛使用冷陰極放電管作爲液晶顯示器的背光 用光源等。該冷陰極放電管係具備有’·將包含水銀蒸氣的 稀釋氣體封入至內部之細的玻璃管；塗佈在玻璃管的內壁 之螢光膜；以及在與玻璃管的管軸方向相對向的狀態下固 定在玻璃管的兩端之一對電極。在點亮之際，在冷陰極放 電管的電極間施加電壓，從冷狀態的一方之電極（陰極）放 出2次電子，持續放電，藉由該放電使引拉至另一方的電 極（陽極）之電子與玻璃管內的水銀分子撞擊，從水銀分子 放射紫外線。藉由該紫外線激起螢光膜，可見光線從螢光 膜發光。 在該冷陰極放電管中，藉由放電產生的陽離子等與電 極（陰極）撞擊，從電極（陰極）放出2次電子。又，對玻璃管 中僅存的電子施加電壓，藉由電子引拉至電極（陽極），開 始放電。 藉由以往的冷鍛加工，冷陰極放電管用電極係成形具 有3nim以下的直徑之需要的形狀。又，使筒狀體的一端 開放，在閉塞另一端之杯狀形成電極時，亮度高的負輝光 -5 - (3) 1311334 【發明內容】 〔發明所欲解決之課題〕 因此，本發明之目的在於提供一種藉由耐濺鍍性高、 長壽命且可以低價構入的材料，以良好的加工性形成的冷 陰極放電管用電極及冷陰極放電管用電極組裝體。 〔用以解決課題之方案〕 本發明之冷陰極放電管用電極，係根據重量基準包含 6 %至3 2 %之鈮（Nb)、及殘部鎳（Ni)。將6%以上的鋸加入鎳 而合金化形成的電極，判斷表示與純鈮匹敵左右的高耐濺 鍍性之事實。其理由雖未明確確認，惟當在鎳添加特定量 的鈮而合金化時，析出至電極表面的硬質之金屬間化合物 (N i 3Nb)推測使電極的耐濺鍍性提升。要有效發揮其效果 時，需要含有鈮6 %以上。又，當鈮的含有量超過3 2 %時， 不會提升耐濺鍍性，而使硬度過度增加，產生加工性降低 的缺點。 本發明之冷陰極放電管用電極組裝體，其特徵在於具 備有：根據重量基準包含6%至32%之鈮（Nb)與殘部鎳（Ni) 之杯狀的電極（1 〇 );以及固接於該電極（1 0 )的底面之 導線（12)。根據重量基準使用包含6%至32%之鈮（Nb)與 殘部鎳（Ni)之鈮-鎳合金作爲電極材料，可容易且良好的 形成放電特性優良的杯形狀之電極，上述鈮-鎳合金由於 與導線的融接性良好且亦不會產生高溫的氧化污染的問題 ，因此可獲得信賴性高的冷陰極放電管用電極組裝體。 (5) 1311334 【表]】 __表1 耐濺鍍性測定結果 試驗片號碼 材質組成 耐濺鑛性 1 純]s1 i (比較用） 10 0% 2 純N b (比較用） 5 0% 〇 N i - 2 % N b 94% 4 N i - 5 % N b 9 2% 5 N i - 6 % N b 7 1 % 6 N i - 8 % N b 6 2% 7 N i - 1 〇 % N b 60% 8 N i - 1 5 % N b 5 9% 9 N i - 2 0 % N b 5 8% 1 0 N i - 2 3.2 % N b 5 4% 11 N i - 2 8 % N b 53% ]2 N i - 3 2 % N b 5 2.5% 1 3 N i - 3 5 % N b 5 2% 本發明者等在使冷陰極放電管用電極壽命高壽命化之 硏究中，著眼在鎳與鈮之合金作爲電極用材料，-邊增加 鈮的含有量一邊以各種配合量將鈮與鎳合金化形成電極時 ，當鈮含有量到達6 %時’與優良的純鈮大致匹敵的水準 之耐濺鍍性急遽出現’超越32% ’判斷即使增加鈮的含有 量效果爲大致飽和之現象。 第2圖係表示在橫軸取得鈮含有量，在縱軸取得濺鍍 -9- (7) 1311334 表2 燒鈍後的硬度 試驗片號碼 材質組成 硬度（Hv) 3 N i - 2 % N b ]]0-13 0 4 N 1 - 5 % N b 140-160 5 N i - 6 % N b 150-170 6 N i - 8 % N b 160-180 7 N i - 1 0 % N b 180-200 8 N i - 1 5 % N b 210-230 9 N i - 2 0 % N b 250-270 10 N i - 2 3.2 % N b 350-370 11 N i - 2 8 % N b 360-380 ]2 N i - 3 2 % N b 400-430 13 N i - 3 5 % N b 430-470 本發明之上述實施形態在不脫離本發明的旨趣之範圍 內可進行各種變更。 【圖式簡單說明】 第1圖係本發明之冷陰極放電管用電極組裝體的實施 形態之剖面圖。 第2圖係鋸含有量與灑鍍速率之關係的表格。 [主要元件符號說明〕 ]0 :電極 -11 - (8) 1311334 ]2 :導線 1 4 :冷陰極放電管用電極組裝體 -12 -(1) 1311334 IX. Description of the Invention [Technical Field] The present invention provides an electrode for a cold cathode discharge tube, and more particularly to an electrode for a cold cathode discharge tube having splash resistance and high life and having the cold cathode discharge An electrode assembly for a cold cathode discharge tube of a tube electrode. [Prior Art] Conventionally, a cold cathode discharge tube has been widely used as a light source for backlights of liquid crystal displays. The cold cathode discharge tube is provided with a thin glass tube that encapsulates a dilution gas containing mercury vapor into the inside; a fluorescent film coated on the inner wall of the glass tube; and a direction opposite to the tube axis direction of the glass tube In one state, one of the two ends of the glass tube is fixed to the opposite electrode. When the light is turned on, a voltage is applied between the electrodes of the cold cathode discharge tube, and the electrons are discharged twice from one electrode (cathode) in the cold state, and the discharge is continued, and the discharge is pulled to the other electrode (anode). The electrons collide with mercury molecules in the glass tube to emit ultraviolet light from the mercury molecules. The ultraviolet light ignites the fluorescent film, and the visible light illuminates from the fluorescent film. In the cold cathode discharge tube, a cation or the like generated by the discharge collides with the electrode (cathode) to discharge the electron twice from the electrode (cathode). Further, a voltage is applied to the only electrons remaining in the glass tube, and the electrons are pulled to the electrode (anode) to start discharging. In the conventional cold forging process, the electrode for a cold cathode discharge tube is formed into a shape having a diameter of 3 nm or less. Further, when one end of the cylindrical body is opened and the cup-shaped electrode is formed at the other end, the negative glow of high brightness is -5 - (3) 1311334 [Explanation] [Problems to be solved by the invention] Therefore, the present invention It is an object of the invention to provide an electrode for a cold cathode discharge tube and an electrode assembly for a cold cathode discharge tube which are formed by a material having high sputtering resistance, long life and low cost. [Means for Solving the Problem] The electrode for a cold cathode discharge tube of the present invention contains 6 to 32% of niobium (Nb) and residual nickel (Ni) based on the weight. An electrode formed by alloying 6% or more of the saw with nickel was judged to have a high spatter resistance which is comparable to that of pure ruthenium. Although the reason for this is not clearly confirmed, when a certain amount of niobium is added to nickel and alloyed, the hard intermetallic compound (N i 3Nb) deposited on the surface of the electrode is presumed to improve the sputter resistance of the electrode. To effectively exert its effect, it needs to contain more than 6%. Further, when the content of niobium exceeds 32 %, the sputtering resistance is not improved, and the hardness is excessively increased to cause a decrease in workability. An electrode assembly for a cold cathode discharge tube according to the present invention, comprising: a cup-shaped electrode (1 〇) containing 6% to 32% of niobium (Nb) and residual nickel (Ni) by weight; and fixing a wire (12) on the bottom surface of the electrode (10). A cup-shaped electrode excellent in discharge characteristics can be easily and favorably formed by using a bismuth-nickel alloy containing 6% to 32% of niobium (Nb) and residual nickel (Ni) as an electrode material, the above-mentioned niobium-nickel alloy. Since the fusion property with the wire is good and the problem of high-temperature oxidation contamination does not occur, an electrode assembly for a cold cathode discharge tube having high reliability can be obtained. (5) 1311334 [Table]] __ Table 1 Splash resistance measurement results Test piece number Material composition Splash resistance 1 Pure]s1 i (comparative) 10 0% 2 Pure N b (comparative) 5 0% 〇N i - 2 % N b 94% 4 N i - 5 % N b 9 2% 5 N i - 6 % N b 7 1 % 6 N i - 8 % N b 6 2% 7 N i - 1 〇% N b 60% 8 N i - 1 5 % N b 5 9% 9 N i - 2 0 % N b 5 8% 1 0 N i - 2 3.2 % N b 5 4% 11 N i - 2 8 % N b 53%]2 N i - 3 2 % N b 5 2.5% 1 3 N i - 3 5 % N b 5 2% The inventors of the present invention have focused on the life of the electrode for a cold cathode discharge tube. When the alloy of nickel and niobium is used as an electrode material, the alloy is alloyed with nickel in various amounts to form an electrode while increasing the content of niobium. When the niobium content reaches 6%, the level is superior to that of an excellent pure niobium. The splash resistance is imminent, and 'over 32%' is judged even if the effect of increasing the content of strontium is substantially saturated. Fig. 2 shows the 铌 content on the horizontal axis and the sputtering on the vertical axis. -9- (7) 1311334 Table 2 Hardness test piece number Material hardness (Hv) 3 N i - 2 % N b ]]0-13 0 4 N 1 - 5 % N b 140-160 5 N i - 6 % N b 150-170 6 N i - 8 % N b 160-180 7 N i - 1 0 % N b 180- 200 8 N i - 1 5 % N b 210-230 9 N i - 2 0 % N b 250-270 10 N i - 2 3.2 % N b 350-370 11 N i - 2 8 % N b 360-380 ] 2 N i - 3 2 % N b 400-430 13 N i - 3 5 % N b 430-470 The above-described embodiments of the present invention can be variously modified without departing from the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing an embodiment of an electrode assembly for a cold cathode discharge tube of the present invention. Figure 2 is a table of the relationship between the amount of saw saw and the rate of sputter. [Main component symbol description] ] 0 : Electrode -11 - (8) 1311334 ] 2 : Conductor 1 4 : Electrode assembly for cold cathode discharge tube -12 -