1290404 九、發明說明： 【發明所屬之技術領域】 本發明關於一種過電壓保護元件及其製造方法，特別是 一種於過電壓保護元件本體表面上形成含鐵絕緣層，用以 於電鍍端電極過程中保護該過電壓保護元件本體之方法。 【先前技術】 為因應現今電子相關產品輕、薄、短、小的需要，積體 電路元件被大量採用，為了保護這些積體電路元件不受突 波之損壞，必須採用可在數伏特之低電壓下工作之過電壓 保護元件（over-v〇ltage protecting device)，例如變阻器 (varistor)，故低電壓應用之積層晶片型變阻器逐漸受到重 視。利用積層技術製作變阻元件，除了有減少體積及方便 表面黏著技術應用外，並且可精確維持於數伏特至數十伏 特之低壓範圍。 現有之變阻器中以氧化鋅系統變阻器最被廣泛地應用。 中華民國公告第231357號專利揭示一種氧化辞變阻器，其 中除了使用至少9G莫耳％的氧化辞外，同時添加了 〇〇〇1至 2.〇莫耳％的氧化鎖和〇.〇〇5^ 〇重量％的稀土元素氧化 物，俾使降低變阻器之漏電流情形。中華民國公告第543〇43 號專利揭路-種以氧化辞為主成分之變阻器並於該變阻器 之表面上形成具較佳耐鹼性或耐酸性之析出膜。此外，： 國專利第6,146,552號亦揭露—種氧化辞陶究變阻器，其係 於氧化鋅材料粉末中添加氧化叙、氧化鈦、及氧化_組 成之合成粉末以增進變阻器之電特性及可靠性。 99772.doc 1290404 山在習知氡化鋅變阻器之製程中，為了利用電鍍方式製作 &電極’首先必須保護氧化鋅變阻器本體，以防止該 鋅變阻器本體與其上之端電極同時被電鍍。1290404 IX. Description of the Invention: [Technical Field] The present invention relates to an overvoltage protection component and a method of fabricating the same, and more particularly to forming an iron-containing insulating layer on a surface of an overvoltage protection component body for plating a terminal electrode process A method of protecting the body of the overvoltage protection component. [Prior Art] In order to meet the needs of today's electronic related products, light, thin, short, and small, integrated circuit components are widely used. In order to protect these integrated circuit components from the surge, it must be low at several volts. Over-voltage devices (such as varistor) operate under voltage, so laminated-type varistors for low-voltage applications are receiving increasing attention. The use of laminate technology to fabricate varistor components, in addition to reduced volume and ease of surface adhesion technology, can be accurately maintained in the low voltage range of a few volts to tens of volts. Among the existing varistor, the zinc oxide system varistor is most widely used. The Republic of China Publication No. 231357 discloses an oxidative varistor in which an oxidized lock of 〇〇〇1 to 2. 〇 mol% and 〇.〇〇5^ are added in addition to at least 9G mol% of oxidation. 〇% by weight of the rare earth element oxide, which reduces the leakage current of the varistor. The Republic of China Announcement No. 543〇43 discloses a varistor which is mainly composed of oxidized words and forms a precipitated film having better alkali resistance or acid resistance on the surface of the varistor. In addition, Japanese Patent No. 6,146,552 also discloses a oxidized ceramic varistor which is added to a zinc oxide material powder by adding oxidized, titanium oxide, and oxidized synthetic powder to enhance the electrical characteristics and reliability of the varistor. 99772.doc 1290404 In the process of the conventional zinc-zinc varistor, in order to make the & electrode by electroplating, the zinc oxide varistor body must first be protected to prevent the zinc varistor body from being plated simultaneously with the terminal electrode thereon.
。。美國專利第5,614，()74及5,757,263號揭到紐氧化辞變阻 器本體之技術’其首先將該氧化鋅變組器本體浸置於—磷 酸根溶液中，以形成-_鋅覆膜保護該氧化鋅變阻琴本 體，之後，該磷酸鋅覆膜再經由熱處理（通常為_至撕。c) 使強化該魏鋅覆膜結構，以利於保護該氧化鋅變阻器本 體在電鑛過程中免於鍍上金屬，如鎳或錫。 上述驾用該方式之缺點為，在電鑛過程中，由於該氧 化辞變阻器本體必須置於酸性電鍍液中，而該磷酸鋅覆膜 在酸性電鍍液中被電鍍液腐蝕甚快，以至於無法有效保護 該氧化鋅變阻器本體，造成電㈣延現象，使該氧化鋅變 阻器功能劣化或喪失。 因此本案毛明人乃開發一種新顆之過電麼保護元件及 其製造方法’以解決上述問題。 【發明内容】 本發明之主要目的在於提供—種過電錢護元件之製造 方法，其係於電鍍端電極之前，先於過錢保護元件本體 表面上形成一含鐵絕緣層以保護該過電壓保護元件本體不 被電鍛液腐餘。 本發明之另-目的在於提供—種過電Μ護元件之製造 方法’其係於電㈣電極之前，且在過電壓保護元件本體 表面上形成一磷酸辞絕緣層後，藉由鐵離子之添加以取代 99112.doc 1290404 部分的磷酸鋅中的辞離子而形成一磷酸辞鐵絕緣層，再經 由在約600至9〇〇t熱處理以強化磷酸鋅鐵的結晶性，以保 護該過電壓保護元件本體不被電鍍液腐蝕，以改善習用磷 酸辞絕緣層抗酸腐純不足的缺點。此外，相對於其他製 作覆膜之方法，本發明之磷酸鋅鐵覆膜可以達到剛好 覆㈣電壓保護元件本體’而不會發生習用覆膜方法不是 覆盍不足就是覆蓋過多之情形。因此，應用於過電壓保護 疋件（如變阻器）組排時，本發明可達更好之保護效果。 本發明之另—目的在於提供—種過電壓保護元件之製造 方法’其係於電鑛端電極之前，於過電壓保護元件本體表 面上列印-氧化物膏（Qxidepaste)，其中該氧化物膏至少包 含磷氧化物及鐵氧化物，之後再加熱該氧化物膏，以形成 本發明之另—目的在於提供—種過電麼保護元件之製造 法，其係分別設置一絕緣層薄帶於 疊成之埵聶舻夕馆aπ 乳化辞陶是薄帶所堆 面，或是該絕緣層薄帶插設於該 錢緣層薄帶及氧化鋅 陶一起燒結。該等絕緣層薄 程中保護料氧化辞„薄帶。^在料之電鑛製 【實施方式】 本發明係關於一種過電壓保護元 赞i生古土 *〆 更兀件（例如一變阻器）之. . U.S. Patent Nos. 5,614, (74) and 5,757,263, the disclosure of the entire disclosure of the entire disclosure of the utility of the disclosure of the entire disclosure of the entire disclosure of the disclosure of the disclosure of the entire disclosure of Zinc varistor body, after which the zinc phosphate coating is strengthened by heat treatment (usually _ to tear. c) to strengthen the Wei zinc mulch structure to protect the zinc varistor body from plating during the electric ore process. On a metal such as nickel or tin. The disadvantage of the above driving method is that in the process of electric ore, since the body of the oxidizing resistor must be placed in the acidic plating solution, the zinc phosphate coating is corroded by the plating solution in the acidic plating solution so much that it cannot be Effectively protecting the body of the zinc oxide varistor, causing an electric (four) extension phenomenon, deteriorating or losing the function of the zinc oxide varistor. Therefore, the case of Mao Mingren is to develop a new type of over-voltage protection element and its manufacturing method to solve the above problems. SUMMARY OF THE INVENTION The main object of the present invention is to provide a method for manufacturing an over-current protection device, which is formed by forming an iron-containing insulating layer on the surface of the body of the protective member prior to plating the terminal electrode to protect the over-voltage. The body of the protection element is not rotted by the electric forging liquid. Another object of the present invention is to provide a method for manufacturing an over-current protection element, which is preceded by an electric (four) electrode and is formed by adding an iron phosphate layer on the surface of the over-voltage protection element body. The iron oxide insulating layer is formed by substituting the reloning ions in the zinc phosphate of the 99112.doc 1290404 part, and the crystallinity of the zinc iron phosphate is strengthened by heat treatment at about 600 to 9 〇〇t to protect the overvoltage protection element. The body is not corroded by the plating solution to improve the shortcomings of the conventional acid phosphate insulation layer. Further, with respect to other methods of producing a film, the zinc iron phosphate film of the present invention can achieve the coverage of the body member of the voltage protection element without the conventional coating method being either insufficiently covered or over-covered. Therefore, the present invention can achieve a better protection effect when applied to an overvoltage protection component (such as a varistor). Another object of the present invention is to provide a method for manufacturing an overvoltage protection device, which is printed on the surface of the overvoltage protection device body before the electrode of the electrodepositing electrode, and the oxide paste (Qxidepaste), wherein the oxide paste Having at least a phosphorus oxide and an iron oxide, and then heating the oxide paste to form another embodiment of the present invention, the object of the invention is to provide a method for manufacturing a protective element, which is provided with an insulating layer strip The a 乳化 辞 辞 埵 是 a a a a a a a a a a a a a a 埵 埵 埵 埵 埵 埵 埵 埵 埵 埵 埵 埵 埵 埵 埵 埵 埵 埵 埵 埵 埵The oxidation of the protective material in the thin layer of the insulating layer is thin. The electro-mineral system of the material is in the form of an over-voltage protection element, such as a varistor (for example, a varistor) It
Ik方法，其係於電鍍端電極之 本體八 先於過電壓保護元件 體在當、 ―絕緣層以保護該過電㈣護元件本 電錢端電極過程中不被電錢液腐餘及被電鍍。 99772.doc 1290404 本文所述之「鐵離子」可為任何技藝中習知之鐵離子， 其包括但不限於Fe2+及Fe3+。 >本文所述之「過電壓保護元件本體」為含鋅之過電壓保 € 件，其較佳係由複數個具有内電極於表面上之氧化辞 ^薄TF所堆：E且燒結而成。本發明之過電壓保護元件本 ” 、任何技藝中之習知方式製造，例如，該過電壓保護 元件本體之製造步驟如下·· (1)提供複數個氧化鋅陶瓷薄帶； • (2)印刷内電極； (3) 堆疊該等氧化鋅陶瓷薄帶，以形成—堆疊體；及 (4) 燒結該堆疊體以形成該過電壓保護元件本體， 該製造步驟較佳地可作下列變化，步驟⑴更包括提供至 少一絕緣層薄帶，該絕緣層薄帶之材質係不同於該等氧化 鋅陶兗薄帶，且步驟（3)係堆疊該等氧化辞陶究薄帶及該絕 緣層薄帶，以形成一堆疊體。 • 其中該内電極可印刷於該等氧化辞陶竟薄帶上或於該絕 緣層薄帶上。 .在—較佳實施財，該過電㈣護元件本體包括至少9〇 莫耳％之氧化鋅及至多1G莫耳％之添加劑，其中該添加劑包 含金屬氧化物及其混合物，該金屬氧化物之金屬係選自由 鉻、錳、鈷、銻、鋁及鉍所組成之群。 本文所述之「過電麼保罐分杜士贼 k电座保邊凡件本體之表面」係包括該過 電壓保護元件本體之頂面、底面及二側面，但不包括其二 端面’其中該頂面及底面係與該等氧化辞陶究薄帶堆疊方 99772.doc 1290404 该二側面係相對 向同方向，該二端面係用以形成端電極， 於該二端面。 該過電Μ保護元件之製造方法有下述幾種。 第一實施例包括以下步驟： (a)提供一過電壓保護元件本體； ⑻分別形成-端電極於該過電壓保護元件本體之二端 面； ⑷將該過錢保護元件本體浸於—磷酸鹽溶液中，以形 成-填酸鋅之絕緣層於該過電壓保護元件本體之表面上： ⑷添加鐵離子至該麟酸鹽溶液中，使該絕緣層包含碟酸 鐵；及 0)電鍍該等端電極。 如刖文所述，本實施例之過電壓保護元件本體可以任何 技藝中之習知方式製造，特言之，其中所用之磷酸鹽溶液 及鐵離子來源可為任何技藝中已知者。本實施例之特點在 於絕緣層之產生方式，其係先以習用方法形成一磷酸鋅絕 緣層’之後再以鐵離子（例如Fe2—，來自於硫酸鐵（FeS〇4)) 部份取代該磷酸鋅絕緣層之鋅離子，而形成一新的磷酸鋅 鐵絕緣層。 然而可以理解的是，上述步驟（^及（d)之順序係可以互相 對調’亦即’可以先添加鐵離子至一磷酸鹽溶液後（步驟 (d))，再將該過電壓保護元件本體浸於該含鐵之鱗酸鹽溶液 中（步驟（c))，以生成磷酸鋅鐵絕緣層。 之後，再經由在約600至約900°C，較佳為約700°C至約850 99772.doc 1290404 c ’熱處理以強化磷酸鐵與磷酸鋅的結晶性，以保護該過 電麼保護元件本體不被電鍍液腐蝕，以改善習用絕緣層只 有磷酸鋅成分而抗酸腐蝕性不足的缺點。本技藝人士可以 理解的疋’於此實施例之另一態樣，該鐵離子亦可全部取 代該磷酸鋅絕緣層之鋅離子，而形成一新的磷酸鐵絕緣層。 在一較佳實施例中，步驟（c)之反應式如下： 3ΖηΟ+2Κ3(Ρ〇4)^ Ζη3(Ρ04)2+3Κ20 所產生之磷酸鋅係為Ζη3(Ρ04)2。 步驟（d)之反應式如下：The Ik method is applied to the body of the plated electrode, and is not subjected to the electro-hydraulic solution and is electroplated in the process of protecting the over-current (four) protection component from the over-voltage protection component body. . 99772.doc 1290404 "Iron ions" as described herein can be any of the iron ions known in the art including, but not limited to, Fe2+ and Fe3+. > The "overvoltage protection device body" described herein is a zinc-containing overvoltage protection component, which is preferably formed by a plurality of oxidized thin TFs having internal electrodes on the surface: E and sintered. . The overvoltage protection component of the present invention is manufactured by any conventional means in the art. For example, the manufacturing steps of the overvoltage protection component body are as follows: (1) providing a plurality of zinc oxide ceramic ribbons; (2) printing (3) stacking the zinc oxide ceramic strips to form a stack; and (4) sintering the stack to form the overvoltage protection element body, the manufacturing step preferably being modified as follows (1) further comprising providing at least one insulating layer strip, the material of the insulating layer strip is different from the zinc oxide pottery strips, and the step (3) stacking the thin strips of the oxide and the thin layer of the insulating layer a strip to form a stack. The inner electrode can be printed on the thin strip of the oxide layer or on the strip of the insulating layer. In the preferred embodiment, the body of the over-current (four) protector comprises At least 9 mol% zinc oxide and up to 1 G mol% of the additive, wherein the additive comprises a metal oxide and a mixture thereof, the metal of the metal oxide being selected from the group consisting of chromium, manganese, cobalt, lanthanum, aluminum and lanthanum Group of groups. The "over-electricity protection tank can be divided into the surface of the body of the Duoshi thief k electric seat to protect the edge of the body" includes the top surface, the bottom surface and the two sides of the overvoltage protection component body, but does not include the two end faces of which the top surface And the bottom surface and the oxidized ceramic strip stack 99933.doc 1290404. The two side faces are opposite in the same direction, and the two end faces are used to form the terminal electrodes on the two end faces. There are several methods for manufacturing the over-current protection element. The first embodiment comprises the following steps: (a) providing an overvoltage protection component body; (8) respectively forming a terminal electrode on both ends of the overvoltage protection component body; (4) immersing the excess protection component body in a phosphate solution Forming an insulating layer of zinc-filled zinc on the surface of the overvoltage protection element body: (4) adding iron ions to the sulphate solution, so that the insulating layer comprises iron silicate; and 0) plating the ends electrode. As described herein, the overvoltage protection component body of the present embodiment can be fabricated in any manner known in the art, in particular, the phosphate solution and source of iron ions used therein can be any of those known in the art. The present embodiment is characterized in that the insulating layer is formed by first forming a zinc phosphate insulating layer by a conventional method, and then replacing the phosphoric acid with iron ions (for example, Fe2 - from ferric sulfate (FeS〇4)). The zinc ion of the zinc insulating layer forms a new zinc-iron oxide insulating layer. However, it can be understood that the steps (^ and (d) of the above steps can be mutually adjusted, that is, the iron ion to the first phosphate solution can be added first (step (d)), and then the overvoltage protection element body is Immersing in the iron-containing scallate solution (step (c)) to form a zinc iron phosphate insulating layer. Thereafter, passing through at about 600 to about 900 ° C, preferably about 700 ° C to about 850 99772 .doc 1290404 c 'Heat treatment to enhance the crystallinity of iron phosphate and zinc phosphate to protect the over-electrode from protecting the body of the element from corrosion by the plating solution, so as to improve the disadvantage that the conventional insulating layer is only zinc phosphate and has insufficient acid corrosion resistance. It can be understood by those skilled in the art that in another aspect of the embodiment, the iron ions may also completely replace the zinc ions of the zinc phosphate insulating layer to form a new iron phosphate insulating layer. The reaction formula of the step (c) is as follows: 3ΖηΟ+2Κ3(Ρ〇4)^Ζη3(Ρ04)2+3Κ20 The zinc phosphate produced is Ζη3(Ρ04)2. The reaction formula of the step (d) is as follows:
Zn3(P04)2+3FeS04— Fe3(P〇4)2+3ZnS04 所產生之磷酸鐵係為Fe3(P04)2。 可以理解的疋’可以利用技藝中已知之其他方式產生 FeHP04之磷酸鐵。 較佳地，該端電極係為銀電極，該步驟（d)之後更包括一 於約600至約900°C，較佳為約600至85〇t:下熱處理該絕緣 層之步驟’且步驟（e)係電鑛錄及錫。 本實施例所製成之過電壓保護元件，包括一過電壓保護 元件本體、二端電極及一含磷酸鐵之絕緣層。該過電壓保 護元件本體具有一頂面、一底面、二側面及二端面。該等 端電極係分別位於該過電壓保護元件本體之二端面。該含 磷酸鐵之絕緣層係位於該過電壓保護元件本體之頂面、一 底面及二側面。 第二實施例包括以下步驟： (a)提供一過電壓保護元件本體； 99772.doc -10- 1290404 (b) 分別形成一端電極於該過電壓保護元件本體之二端 面； (c) 將该過電壓保護元件本體浸於一璘酸鹽溶液中，其中 該構酸鹽溶液至少包含麟酸根離子及鐵離子； (d) 形成磷酸鋅鐵析出物於該過電壓保護元件本體之表 面上； (e) 加熱該磷酸鋅鐵析出物以形成.一絕緣層；及 (f) 電鍍該等端電極。 1 本實施例與第一實施例之差別在於該絕緣層之產生方 式。在本實施例中，該絕緣層之產生方式係先形成磷酸鋅 鐵析出物，之後加熱該磷酸鋅鐵析出物而形成一磷酸鋅鐵 化合物（iron zinc phosphate)絕緣層。其鐵離子之來源如第 一實施例中所述。在一較佳實施例中，該磷酸鋅鐵化合物 絕緣層係為[(ZiM^FexXPO4)2]。在另一較佳實施例中，該 磷酸鋅鐵化合物絕緣層則為[(Zni_x，Fex)Hp〇4]。 , 本實施例所製成之過電壓保護元件，包括一過電壓保護 元件本體、二端電極及一磷酸鋅鐵化合物之絕緣層。該過 電壓保護元件本體具有一頂面、一底面、二侧面及二端面。 該等端電極係分別位於該過電壓保護元件本體之二端面。 δ玄磷酸鋅鐵化合物之絕緣層係位於該過電壓保護元件本體 之頂面、一底面及二側面。 第三實施例包括以下步驟： (a) 提供一過電壓保護元件本體； (b) 印刷一氧化物膏（oxide paste)於該過電壓保護元件本 99772.doc -11- 1290404 體之表面上，其中該氧化物膏至少包含磷氧化物及鐵氧化 物； (C)加熱該氧化物膏，以形成一絕緣層； (d) 分別形成一端電極於該過電壓保護元件本體之二端 面；及 (e) 電鍍該等端電極。 本實施例與第一實施例之差別在於該絕緣層之產生方 式。在本實施例中，該絕緣層之產生方式係利用列印一含 磷氧化物及鐵氧化物之氧化物膏。在一較佳實施例中，該 氧化物膏包括20至65重量％之鐵氧化物、20至65重量％之磷 氧化物、0至10重量❶/。之鉍氧化物及〇至3〇重量％之鋅氧化 物，其中該鐵氧化物可為習知之鐵氧化物，較佳為Fe2〇3。 該磷氧化物可為習知之磷氧化物，較佳為p2〇5。該鉍氧化 物可為習知之Μ氧化物，較佳為BhO3。該鋅氧化物可為習 知之辞乳化物，較佳為ZnO。 本實施例所製成之過電壓保護元件，包括一過電壓保護 元件本體、二端電極及一含填氧化物及鐵氧化物之絕緣 層。該過電壓保護元件本體具有一頂面、一底面、二側面 及一端面。該等端電極係分別位於該過電壓保護元件本體 之二端面。該含磷氧化物及鐵氧化物之絕緣層係位於該過 電壓保護元件本體之頂面、一底面及二侧面。 第四實施例包括以下步驟： (a) 提供複數個氧化辞陶瓷薄帶； (b) k供至少一絕緣層薄帶，該絕緣層薄帶之材質係不同 99772.doc -12· 1290404 於該等氧化鋅陶瓷薄帶； (C)印刷内電極於該等氧化鋅陶瓷薄帶或該絕緣層薄帶 上； (d) 堆疊該等氧化辞陶瓷薄帶及該絕緣層薄帶，以形成一 堆疊體； (e) 燒結該堆疊體以形成一過電壓保護元件本體丨及 (f) 於該過電壓保護元件本體二端面形成端冑極，以形成 一過電壓保護元件。 本實施例與上述三種實施例之不同處在於本實施例之特 點在於該過電壓保護元件本體之製造方式。在本實施例 中’該絕緣層係為-陶兗絕緣層薄帶，其係與氧化辞陶究 薄帶-起堆疊後燒結而形成該過電壓保護元件本體。該陶 竟絕緣層薄帶可以位於該過電堡保護元件本體之頂面及底 面，或是插設於該等氧化鋅陶曼薄帶之間。該陶竞絕緣層 薄帶之材質可為氧化銘、氧化錯或玻璃陶究等。 _本實施例所製成之_保護元件，包括一過電廢保護 件本體及二端電極。該過電壓保護元件本體具 面、一底面、二側面及二端面。該過電屢保護元件本體包 括複數個氧化辞陶莞薄帶及二陶究絕緣層薄帶，該 絕緣層薄帶係分別位於該複數氧化辞陶究薄帶之最上方及 最下方。該等端電極係分別位於該過電_護元件本體之 一端面0 可以理解的是，當利用本實施例 ^ ^ ^ ^ 彳叮表W出之過電塵保護 凡件本體/、有上下二絕緣層薄帶時 了可以再利用上述第一 99772.doc -13- 1290404 至二貝鉍例於該過電壓保護元件本體表面形成絕緣層，主 要疋在一側面，但是也可以在頂面及底面形成絕緣層。 么么以下列實例予以詳細說明本發明，唯並不意味本發明 僅侷限於此等實例所揭示之内容。 實例1 : 首先，將94莫耳％氧化鋅（zn〇)粉末、各15莫耳％氧化銻 (Sb203)及氧化經（Mn2〇3)、及各丨莫耳％之氧化鉻（Cr2〇3)、 氧化银（Bl2〇3)及氧化鈷（C〇2〇3)等形成一組合物。利用習知 之陶曼製程技術，將該組合物全部加入去離子水中予以混 合分散5小時，之後，加入7.5重量％之粘著劑（聚乙烯醇， PVA)、3.0重量％之塑化劑（聚乙二醇，Peg)、〇.5重量％之 消泡劑（Triton，購自Air Products公司）及1.0重量％之離型劑 等以製備成一漿體。接著，將該漿體以刮刀成形技術製成 複數個氧化鋅陶瓷薄帶。 接著’再以銀/韵合金（Ag/Pd paste)(其中銀為80重量％， 銘為20重量％ )網版印刷於該等陶瓷薄帶上作為内電極， 經烤乾後，將多層經印刷之陶瓷薄帶堆疊且以壓力壓製， 得到一堆疊體。之後，將該堆疊體切割成長約1 ·2 mm，寬 約〇·65 mm之單體。再將該單體於300°C下燒製約24小時以 移除有機粘著劑，之後於約900°C下燒結約90分鐘，而製成 一氧化辞變阻器本體。 接著，利用習知技術進行去銳角（tumbling)，再分別形成 一銀端電極於該氧化鋅變阻器本體之二端面，且燒結該等 銀端電極。 99772.doc -14- 1290404 接著，將該氧化辞變阻器本體浸於一磷酸鉀（κ^ρ〇4^溶 液中，且控制溫度在約7(rc，同時進行_，以利該氧化 辞變阻器本體之氧化辞可以與磷酸根反應，而在該氧化鋅 變阻器本體之表面上形成一磷酸鋅（ZnypO4)2)之絕緣層。 接著，添加硫酸鐵（FeS〇4)至該磷酸鉀溶液中，以產生鐵 離子（Fe2 )’該鐵離子部份取代該磷酸鋅絕緣層之鋅離子而 形成鱗酸鐵（Fe3(P〇4)2)，而形成一新的絕緣層，其包括麟 酸鋅及磷酸鐵。之後，將該絕緣層在約7〇〇至85〇艺溫度下 維持10分鐘至6小時之熱處理以強化磷酸鐵與磷酸鋅的結 晶性與抗酸性。 之後，將該氧化鋅變阻器本體置入一鎳溶液進行電鍍， 將该等端電極電鍍鎳2 μιη，清洗後，再置入一錫溶液中進 行電鍍錫3 μιη，即可製成一氧化鋅變阻器。 實例2 : 首先，將94莫耳％氧化鋅（Ζη0)粉末、各ι·5莫耳％氧化銻 (Sb203)及氧化錳（Μη2〇3)、及各1莫耳％之氧化鉻（Cr2〇3)、 氧化絲（Bi2〇3)及氧化銘（c〇2〇3)等形成一組合物。利用習知 之陶瓷製程技術，將該組合物全部加入去離子水中予以混 合分散5小時，之後，加入7.5重量％之粘著劑（聚乙稀醇， PVA)、3.0重量％之塑化劑（聚乙二醇，peg)、0.5重量％之 消泡劑（Triton，購自Air Products公司）及1.〇重量％之離型劑 等以製備成一漿體。接著，將該漿體以刮刀成形技術製成 複數個氧化鋅陶瓷薄帶。 接著，再以銀/翻合金（Ag/Pd paste)(其中銀為80重量％， 99772.doc -15- 1290404 :為20重m % )網版印刷於該等陶㈣帶上作為内電極， f烤乾後’將多層經印刷之陶瓷薄帶堆疊且以壓力壓製， 侍到堆豐體。之後，將該堆疊體切割成長約丨·2 mm，寬 約〇·65 mm之單體。再將該單體於約3〇(rc下燒製約以小時 以移除有機粘著劑，之後於約9〇(rc下燒結約9〇分鐘，而製 成一氧化鋅變阻器本體。 接著，利用習知技術進行去銳角（tumbling)，再分別形成 一銀端電極於該氧化辞變阻器本體之二端面，且燒結該等 銀端電極。 接著，將該氧化鋅變阻器本體浸於一磷酸鉀（K3(p〇4))溶 液中，此磷酸鉀溶液中具有約2〇〇 ??111之鐵離子。待該氧化 鋅變阻器本體之表面形成麟酸鋅鐵析出物，隨後於約7⑼ C下加熱約30分鐘，使其生成一磷酸鋅鐵化合物（ir〇n zinc phosphate)之絕緣層，該構酸鋅鐵化合物之化學式為 [(ZnbxJexWPCUh]或[(ZnhJeOHPCU]。 之後’將該氧化辞變阻器本體置入一錄溶液進行電鑛， 將該等端電極電鍍鎳2μηι，清洗後，再置入一錫溶液中進 行電鍍錫3 μπι，即可製成一氧化辞變阻器。 實例3 : 首先，將94莫耳％氧化鋅（ΖηΟ)粉末、各1 _5莫耳％氧化錄 (Sb203)及氧化猛（Μη203)、及各1莫耳％之氧化鉻（Cr2〇3)、 氧化麵（Bi2〇3)及氧化姑（C〇2〇3)等形成一組合物。利用習知 之陶瓷製程技術，將該組合物全部加入去離子水中予以混 合分散5小時，之後，加入7.5重量％之粘著劑（聚乙烯醇， 99772.doc -16- 1290404 PVA)、3.0重量％之塑化劑（聚乙二醇，PEg)、〇·5重量％之 消泡劑（Triton，購自Air Products公司）及ι·〇重量％之離型劑 等以製備成-聚體。接著，將該漿體以刮刀成形技術製成 複數個氧化鋅陶瓷薄帶。 接著，再以銀/鉑合金（Ag/Pdpaste)(其中銀為8〇重量％， 鉑為20重量❶/。）網版印刷於該等陶瓷薄帶上作為内電極， 經烤乾後，將多層經印刷之陶瓷薄帶堆疊且以壓力壓製， 得到一堆疊體。之後，將該堆疊體切割成長約12 mm，寬 約〇·65 mm之單體。再將該單體於約3〇(rc下燒製約以小時 以移除有機粘著劑，之後於約900。〇下燒結約9〇分鐘，而製 成一氧化鋅變阻器本體。 接著’利用習知技術進行去銳角（turnbling)。 接著，將於該氧化鋅變阻器本體頂面、底面及二側面上 利用網版印刷之技術列印一氧化物膏，其中該氧化物膏包 括40重量％之氧化鐵（以2…）、4〇重量％之氧化磷”山〗）、2 .重置％之氧化鉍（則2〇3)、18重量％之氧化鋅（Zn〇)。此外該 氧化物膏更包括其他溶劑（solvent)及粘著劑（binder)。 隨後於約700°C下加熱該氧化物膏約3〇分鐘，使其生成一 絕緣層。再分別形成一銀端電極於該氧化鋅變阻器本體之 一端面’且燒結該等銀端電極。 之後’將該氧化鋅變阻器本體置入一鎳溶液進行電鍍， 將該等端電極電鍍鎳2 μηι，清洗後，再置入一錫溶液中進 行電鍍錫3 μηι，即可製成一氧化辞變阻器。 實例4 : 99772.doc -17- 1290404 首先，將94莫耳％氧化鋅（ZnO)粉末、各1.5莫耳％氧化録 (Sb203)及氧化錳（Μη203)、及各1莫耳％之氧化鉻（Cr2〇3)、 氧化麵（Bi2〇3)及氧化始（C〇2〇3)等形成一組合物。利用習知 之陶瓷製程技術，將該組合物全部加入去離子水中予以混 合分散5小時，之後，加入7.5重量％之粘著劑（聚乙烯醇， PVA)、3.0重量％之塑化劑（聚乙二醇，peg)、0·5重量％之 消泡劑（Triton，購自Air Products公司）及ΐ·〇重量〇/0之離型劑 等以製備成一漿體。接著，將該漿體以刮刀成形技術製成 複數個氧化鋅陶瓷薄帶。 接著，將85重量％之氧化鋁（Ah〇3)粉末及15重量％之硼石夕 酸鹽玻璃填充入一球磨罐中，添加水以將固體含量維持至 約65重量％。之後，加入8.5重量％之粘著劑（聚乙烯醇， PVA)、3.0重量％之塑化劑（聚乙二醇，pEG)、〇·5重量％之 消泡劑（Triton，購自Air Products公司）及ι·〇重量〇/〇之離型劑 等以製備成一漿體。再藉由刀片壓過鑄造漿（cast slurry)而 形成具有80 μχη厚之陶瓷絕緣層薄帶。 接著，再以銀/鉑合金（Ag/Pd paste)(其中銀為8〇重量〇/0， 鉑為20重量％)網版印刷於該等陶瓷薄帶上作為内電極， 經烤乾後，將多層經印刷之陶瓷薄帶堆疊，得到一堆疊體。 之後，將該陶瓷絕緣層薄帶置於該堆疊體之頂面及底面， 再以壓力壓製。將該堆疊體切割成長約12 mm，寬約〇65 mm之單體。再將該單體於約3〇(rc下燒製約以小時以移除 有機粘著劑，之後於約900°C下燒結約9〇分鐘，而製成一氧 化鋅變阻器本體。 99772.doc -18- 1290404 實例5 : 首先，以實例4之方式製作一氧化鋅變阻器本體。接著， 利用習知技術進行去銳角（tumbling)，再分別形成一銀端電 極於該氧化鋅變阻器本體之二端面。 接著，再以實例1中絕緣層之產生方式，在該氧化辞變阻 本體之表面上形成一包含磷酸鋅及磷酸鐵之絕緣層。 之後，將該氧化鋅變阻器本體電鍍鎳及錫，即可製成一 氧化鋅變阻器。 實例6 : 首先，以實例4之方式製作一氧化鋅變阻器本體。接著， 利用習知技術進行去銳角（tumbling)，再分別形成一銀端電 極於該氧化鋅變阻器本體之二端面。 接著再依μ例2所述方式，在該氧化鋅變阻器本體之表 面上形成一磷酸辞鐵化合物之絕緣層。 之後，將该氧化鋅變阻器本體電鍍鎳及錫，即可製成一 氧化鋅變阻器。 實例7 : 首先，以實例4之方式製作一氧化鋅變阻器本體。接著， 利用習知技術進行去銳角（tumbling)。 接著再依實例3所述方式，在該氧化鋅變阻器本體列印 乳化物f。然而要注意的是，由於該氧化鋅變阻器本體 之頂面及底面已分別具有一陶瓷絕緣層料，因此，該氧 化物膏僅需列印在該氧化鋅變阻器本體二側面即可。隨 於約職下加熱該氧化物膏約3〇分鐘，使其生成一絕緣 99772.doc •19- 1290404 層。再分別形成-銀端電極於該氧化辞變阻器本體之 面。 —之後，將該氧化鋅變阻器本體電鍍鎳及錫，即可製成一 氧化鋅變阻器。 實例8 : 嫌本實例與實例4大致相同，*同處僅在於該㈣絕緣層薄 帶之材質。在本實例中，係將85重量％之氧化鍅（Zr〇2)粉末 及15重量％之硼矽酸鹽玻璃填充入一球磨罐中，添加水以 將固體含量維持至約65重量％。之後，加入8 5重量％之粘 著劑（聚乙烯醇，PVA)、3.0重量％之塑化劑（聚乙二醇， PEG)、0.5重量％之消泡劑（Triton，購自Air Pr〇ducts公司） 及1.0重量％之離型劑等以製備成一漿體。再藉由刀片壓過 鑄造漿而形成具有80 μηι厚之陶瓷絕緣層薄帶。 實例9 : 本實例與實例4大致相同，不同處僅在於該陶瓷絕緣層薄 帶之材質。在本實例中，係將85重量％之玻璃陶瓷 (glass-ceramic)粉末及15重量％之删石夕酸鹽玻璃填充入一球 磨罐中，添加水以將固體含量維持至約65重量％。之後， 加入8.5重量％之粘著劑（聚乙烯醇，PVA)、3.0重量％之塑 化劑（聚乙二醇，PEG)、0·5重量％之消泡劑（Triton，購自 Air Products公司）及1 ·〇重量％之離型劑專以製備成一漿 體。再藉由刀片壓過禱造聚而形成具有⑽厚之陶竞絕緣 層薄帶。 實例10 : 99772.doc -20- 1290404 本實例與實例4大致相同，不同處僅在於該陶瓷絕緣層薄 帶之材質。在本實例中，係將42.5重量％之氧化錯（Zr02)粉 末、42.5重量％之玻璃陶瓷（giass-ceramic)粉末及15重量％ 之石朋石夕酸鹽玻璃填充入一球磨罐中，添加水以將固體含量 維持至約65重量％。之後，加入8.5重量％之粘著劑（聚乙烯 醇’ pVA)、3.0重量％之塑化劑（聚乙二醇，PeG)、0.5重量 %之请泡劑(Triton，購自Air Products公司）及1.0重量％之離 型劑等以製備成一漿體。再藉由刀片壓過鑄造漿而形成具 有80 μιη厚之陶瓷絕緣層薄帶。 本發明材料、方法及特徵，經上述實例說明將更為明顯， 現應瞭解的县，k h γ 4何不脫離本發明精神下所為之修飾或改 變，皆屬本發明意圖保護者。The iron phosphate produced by Zn3(P04)2+3FeS04-Fe3(P〇4)2+3ZnS04 is Fe3(P04)2. It is understood that 疋' can produce FeHP04 iron phosphate by other means known in the art. Preferably, the terminal electrode is a silver electrode, and the step (d) further comprises a step of heat-treating the insulating layer at about 600 to about 900 ° C, preferably about 600 to 85 〇t: and the step (e) Electrical record and tin. The overvoltage protection component produced in this embodiment comprises an overvoltage protection component body, a two-terminal electrode and an insulating layer containing iron phosphate. The overvoltage protection component body has a top surface, a bottom surface, two side surfaces, and two end surfaces. The terminal electrodes are respectively located at two end faces of the overvoltage protection component body. The insulating layer containing iron phosphate is located on the top surface, a bottom surface and two side surfaces of the overvoltage protection element body. The second embodiment includes the following steps: (a) providing an overvoltage protection component body; 99772.doc -10- 1290404 (b) respectively forming an end electrode on both ends of the overvoltage protection component body; (c) The voltage protection element body is immersed in a citrate solution, wherein the phytate solution contains at least a cinnamate ion and an iron ion; (d) forming a zinc iron phosphate precipitate on the surface of the overvoltage protection element body; (e) Heating the zinc iron phosphate precipitate to form an insulating layer; and (f) plating the terminal electrodes. 1 This embodiment differs from the first embodiment in the manner in which the insulating layer is produced. In the present embodiment, the insulating layer is formed by first forming a zinc iron phosphate precipitate, and then heating the zinc iron phosphate precipitate to form an iron zinc phosphate insulating layer. The source of the iron ions is as described in the first embodiment. In a preferred embodiment, the zinc iron phosphate compound insulating layer is [(ZiM^FexXPO4) 2]. In another preferred embodiment, the zinc iron phosphate compound insulating layer is [(Zni_x, Fex)Hp〇4]. The overvoltage protection component produced in this embodiment comprises an overvoltage protection component body, a two-terminal electrode and an insulating layer of a zinc iron phosphate compound. The overvoltage protection component body has a top surface, a bottom surface, two side surfaces, and two end surfaces. The terminal electrodes are respectively located at two end faces of the overvoltage protection component body. The insulating layer of the δ zinc stannate iron compound is located on the top surface, the bottom surface and the two side surfaces of the overvoltage protection element body. The third embodiment comprises the steps of: (a) providing an overvoltage protection component body; (b) printing an oxide paste on the surface of the overvoltage protection component body 99772.doc -11-1290404, Wherein the oxide paste comprises at least phosphorus oxides and iron oxides; (C) heating the oxide paste to form an insulating layer; (d) forming one end electrode on both ends of the overvoltage protection element body; e) Electroplating the terminals. The difference between this embodiment and the first embodiment lies in the manner in which the insulating layer is produced. In the present embodiment, the insulating layer is produced by printing an oxide paste containing phosphorus oxide and iron oxide. In a preferred embodiment, the oxide paste comprises 20 to 65 wt% of iron oxide, 20 to 65 wt% of phosphorus oxide, and 0 to 10 wt%. The oxide and the cerium are up to 3% by weight of zinc oxide, wherein the iron oxide may be a conventional iron oxide, preferably Fe2 〇3. The phosphorus oxide may be a conventional phosphorus oxide, preferably p2〇5. The antimony oxide may be a conventional antimony oxide, preferably BhO3. The zinc oxide may be a conventional emulsion, preferably ZnO. The overvoltage protection component produced in this embodiment comprises an overvoltage protection component body, a two-terminal electrode and an insulating layer containing a filler oxide and an iron oxide. The overvoltage protection component body has a top surface, a bottom surface, two side surfaces, and an end surface. The terminal electrodes are respectively located at two end faces of the overvoltage protection component body. The insulating layer containing the phosphorus oxide and the iron oxide is located on the top surface, the bottom surface and the two side surfaces of the overvoltage protection element body. The fourth embodiment comprises the following steps: (a) providing a plurality of oxidized ceramic thin strips; (b) k for at least one insulating thin strip, the material of the insulating thin strip is different 99772.doc -12· 1290404 (C) printing an internal electrode on the zinc oxide ceramic thin strip or the insulating thin strip; (d) stacking the oxidized ceramic thin strip and the insulating thin strip to form a a stack; (e) sintering the stack to form an overvoltage protection component body and (f) forming a terminal drain on both ends of the overvoltage protection component body to form an overvoltage protection component. The difference between this embodiment and the above three embodiments is that the embodiment is characterized by the manner in which the overvoltage protection element body is manufactured. In the present embodiment, the insulating layer is a thin band of a ceramic insulating layer which is stacked and sintered to form the overvoltage protecting element body. The ceramic insulating strip may be located on the top surface and the bottom surface of the over-voltage protection element body or interposed between the zinc oxide Tauman strips. The material of the Tao Jing insulation layer can be oxidized, oxidized or glassed. The protective element produced in this embodiment comprises an over-current waste protector body and two-terminal electrodes. The overvoltage protection component body has a surface, a bottom surface, two side surfaces, and two end surfaces. The over-current protection component body comprises a plurality of oxidized syllabus strips and two slabs of insulating strips, wherein the strips of the insulating layer are respectively located at the top and bottom of the strip of the plurality of oxidized ceramics. The end electrodes are respectively located on one end surface of the over-current protection element body. It can be understood that when the electric dust is used to protect the body of the body by using the embodiment ^ ^ ^ ^ 彳叮When the insulating layer strip is used, the first 99772.doc -13-1290404 to the second shell may be used to form an insulating layer on the surface of the overvoltage protection element body, mainly on one side, but also on the top surface and the bottom surface. An insulating layer is formed. The invention is illustrated by the following examples, which are not intended to be construed as limiting. Example 1: First, 94 mol% zinc oxide (zn〇) powder, 15 mol% of yttrium oxide (Sb203) and oxidized (Mn2〇3), and each mol% of chromium oxide (Cr2〇3) ), silver oxide (Bl 2 〇 3) and cobalt oxide (C 〇 2 〇 3), etc. form a composition. The composition was all mixed into deionized water for mixing and dispersing for 5 hours using a conventional Taman process technique, after which 7.5 wt% of an adhesive (polyvinyl alcohol, PVA) and 3.0 wt% of a plasticizer (poly) were added. Ethylene glycol, Peg), 5% by weight of a defoamer (Triton, available from Air Products) and 1.0% by weight of a release agent, etc., were prepared as a slurry. Next, the slurry was formed into a plurality of zinc oxide ceramic ribbons by a doctor blade forming technique. Then, 'Ag/Pd paste (80% by weight of silver, 20% by weight) was screen printed on the ceramic strips as internal electrodes. After baking, the layers were The printed ceramic strips are stacked and pressed under pressure to obtain a stack. Thereafter, the stack was cut into a monomer having a width of about 1 · 2 mm and a width of about 65 mm. The monomer was then calcined at 300 ° C for 24 hours to remove the organic binder, followed by sintering at about 900 ° C for about 90 minutes to form a varistor body. Then, tumbling is performed by a conventional technique, and a silver terminal electrode is separately formed on both end faces of the body of the zinc oxide varistor, and the silver terminal electrodes are sintered. 99772.doc -14- 1290404 Next, the body of the oxidative varistor is immersed in potassium monophosphate (κ^ρ〇4^ solution, and the temperature is controlled at about 7 (rc, while _ is performed to facilitate the body of the oxidizer) The oxidation word can react with the phosphate, and an insulating layer of zinc phosphate (ZnypO4) 2) is formed on the surface of the zinc oxide varistor body. Next, iron sulfate (FeS〇4) is added to the potassium phosphate solution to Producing iron ions (Fe2)' which partially replaces the zinc ions of the zinc phosphate insulating layer to form iron sulphate (Fe3(P〇4)2), thereby forming a new insulating layer including zinc linnate and Iron phosphate. Thereafter, the insulating layer is heat-treated at a temperature of about 7 to 85 liters for 10 minutes to 6 hours to enhance the crystallinity and acid resistance of the iron phosphate and the zinc phosphate. Thereafter, the zinc oxide varistor body is A nickel solution is placed for electroplating, and the terminal electrode is electroplated with nickel 2 μιη, washed, and then placed in a tin solution for electroplating tin 3 μm to form a zinc oxide varistor. Example 2: First, 94 Molar% zinc oxide (Ζη0) powder, each ι·5 Mo Ears of cerium oxide (Sb203) and manganese oxide (Μη2〇3), and each 1 mol% of chromium oxide (Cr2〇3), oxide wire (Bi2〇3) and oxidation (c〇2〇3) The composition was mixed and dispersed in deionized water for 5 hours by using a conventional ceramic process technology, after which 7.5 wt% of an adhesive (polyvinyl alcohol, PVA) and 3.0% by weight of plastic were added. a chemical (polyethylene glycol, peg), 0.5% by weight of a defoamer (Triton, available from Air Products), and 1.% by weight of a release agent, etc. to prepare a slurry. Next, the slurry is prepared. A plurality of zinc oxide ceramic thin strips are formed by a doctor blade forming technique. Next, an Ag/Pd paste is used (in which silver is 80% by weight, 99772.doc -15-1290404: 20% by weight) Screen printing is performed on the ceramic (four) belts as internal electrodes, and after f-drying, the multi-layer printed ceramic strips are stacked and pressed under pressure to serve the pile. After that, the stack is cut and grown. 2 mm, a monomer having a width of about 65 mm. The monomer is then calcined at about 3 Torr for 1 hour to remove the organic binder. After sintering at about 9 〇 (rc for about 9 〇 minutes, a zinc oxide varistor body is formed. Then, tumbling is performed by a conventional technique, and then a silver terminal electrode is separately formed on the body of the oxidizer. The two end faces are sintered with the silver terminal electrodes. Next, the zinc oxide varistor body is immersed in a potassium monophosphate (K3(p〇4)) solution having about 2 〇〇??111 iron in the potassium phosphate solution. An ion is formed on the surface of the body of the zinc oxide varistor, and then heated at about 7 (9) C for about 30 minutes to form an insulating layer of an il〇n zinc phosphate. The chemical formula of the zinc-iron compound is [(ZnbxJexWPCUh] or [(ZnhJeOHPCU]. Then, the body of the oxidant varistor is placed in a recording solution for electrowinning, and the terminal electrodes are electroplated with nickel 2μηι, washed, and then placed in a tin solution for electroplating tin 3 μπι, thereby preparing an oxidized varistor. . Example 3: First, 94 mol% zinc oxide (ΖηΟ) powder, each 1 _5 mol% oxidation record (Sb203) and oxidized 猛 (Μη203), and each 1 mol% of chromium oxide (Cr2〇3), The oxidation surface (Bi2〇3) and the oxidation (C〇2〇3) form a composition. The composition was all added to deionized water for mixing and dispersing for 5 hours by a conventional ceramic process technique, after which 7.5 wt% of an adhesive (polyvinyl alcohol, 99772.doc -16-1290404 PVA), 3.0% by weight was added. A plasticizer (polyethylene glycol, PEg), a 5% by weight defoamer (Triton, available from Air Products), and a 5% by weight of a release agent or the like to prepare a polymer. Next, the slurry was formed into a plurality of zinc oxide ceramic ribbons by a doctor blade forming technique. Next, a silver/platinum alloy (Ag/Pdpaste) (in which silver is 8 〇% by weight, and platinum is 20 ❶/.) is screen printed on the ceramic strips as internal electrodes, and after baking, The multilayer printed ceramic strips are stacked and pressed under pressure to obtain a stack. Thereafter, the stack was cut into a monomer having a length of about 12 mm and a width of about 65 mm. The monomer was then calcined at about 3 Torr for 1 hour to remove the organic binder, and then sintered at about 900 Torr for about 9 minutes to form a zinc oxide varistor body. The conventional technique performs a turn-up. Next, an oxide paste is printed on the top surface, the bottom surface and the two sides of the zinc oxide varistor body by screen printing, wherein the oxide paste comprises 40% by weight. Iron oxide (2...), 4% by weight of phosphorus oxide "Mountain", 2. Resetting % of cerium oxide (then 2 〇 3), 18% by weight of zinc oxide (Zn 〇). The paste further includes other solvents and binders. The oxide paste is then heated at about 700 ° C for about 3 minutes to form an insulating layer, and a silver terminal electrode is separately formed for the oxidation. One end face of the zinc varistor body is 'sintered and the silver terminal electrodes are sintered. Then, the zinc oxide varistor body is placed in a nickel solution for electroplating, and the terminal electrodes are electroplated with nickel 2 μηι, washed, and then placed in a tin solution. In the process of electroplating tin 3 μηι, you can make a word Resistor. Example 4: 99772.doc -17- 1290404 First, 94 mol% zinc oxide (ZnO) powder, 1.5 mol% of each oxide (Sb203) and manganese oxide (?n203), and 1 mol% each The chromium oxide (Cr2〇3), the oxidation surface (Bi2〇3), and the oxidation start (C〇2〇3) form a composition. The composition is all added to deionized water and mixed by a conventional ceramic process technology. Dispersion for 5 hours, after which, 7.5% by weight of an adhesive (polyvinyl alcohol, PVA), 3.0% by weight of a plasticizer (polyethylene glycol, peg), 0.5% by weight of a defoamer (Triton, A release agent obtained from Air Products Co., Ltd. and ΐ·〇 weight 〇/0 is prepared to prepare a slurry. Then, the slurry is formed into a plurality of zinc oxide ceramic thin strips by a doctor blade forming technique. Next, 85 weights are obtained. Alumina (Ah〇3) powder and 15% by weight of borax acid glass were filled into a ball mill jar, and water was added to maintain the solid content to about 65% by weight. Thereafter, 8.5 wt% of adhesion was added. Agent (polyvinyl alcohol, PVA), 3.0% by weight of plasticizer (polyethylene glycol, pEG), 〇·5% by weight A foaming agent (Triton, available from Air Products) and a release agent such as ι·〇wt〇/〇 to prepare a slurry, and then a mortar having a thickness of 80 μχ is formed by pressing a blade through a cast slurry. a thin strip of insulating layer. Next, a silver/platinum alloy (Ag/Pd paste) (in which silver is 8 〇 weight 〇/0, and platinum is 20% by weight) is screen printed on the ceramic strips as internal electrodes. After baking, the multilayer printed ceramic strips are stacked to obtain a stack. Thereafter, the ceramic insulating layer ribbon is placed on the top and bottom surfaces of the stack, and then pressed under pressure. The stack was cut to a length of about 12 mm and a width of about 65 mm. The monomer was then calcined at about 3 Torr (rc for 1 hour to remove the organic binder, followed by sintering at about 900 ° C for about 9 minutes to form a zinc oxide varistor body. 99772.doc -18- 1290404 Example 5: First, a zinc oxide varistor body was fabricated in the manner of Example 4. Then, tumbling was performed by a conventional technique, and a silver terminal electrode was respectively formed on both ends of the zinc oxide varistor body. Then, an insulating layer containing zinc phosphate and iron phosphate is formed on the surface of the oxidative varistor body in the manner of the insulating layer in Example 1. Thereafter, the zinc oxide varistor body is plated with nickel and tin, that is, A zinc oxide varistor can be fabricated. Example 6: First, a zinc oxide varistor body is fabricated in the manner of Example 4. Next, tumbling is performed by a conventional technique, and a silver terminal electrode is separately formed on the zinc oxide varistor. The two end faces of the body are then formed on the surface of the zinc oxide varistor body in the manner described in Example 2, and then the insulating layer of the iron phosphate compound is formed. A zinc oxide varistor can be fabricated by electroplating nickel and tin.Example 7: First, a zinc oxide varistor body is fabricated in the manner of Example 4. Then, tumbling is performed by a conventional technique. In the manner, the emulsion f is printed on the body of the zinc oxide varistor. However, it should be noted that since the top surface and the bottom surface of the zinc oxide varistor body have a ceramic insulating layer respectively, the oxide paste only needs to be listed. It can be printed on the two sides of the body of the zinc oxide varistor. The oxide paste is heated for about 3 minutes with the job to form an insulating layer 99772.doc • 19-12290404, and then a silver-end electrode is formed thereon. Oxidation of the surface of the varistor body. - After that, the zinc oxide varistor body is electroplated with nickel and tin to form a zinc oxide varistor. Example 8: The present example is substantially the same as the example 4, and the same place is only the (4) insulation. The material of the thin strip. In this example, 85% by weight of cerium oxide (Zr〇2) powder and 15% by weight of borosilicate glass are filled into a ball mill jar, and water is added to increase the solid content. Holding to about 65% by weight. Thereafter, 85 wt% of an adhesive (polyvinyl alcohol, PVA), 3.0 wt% of a plasticizer (polyethylene glycol, PEG), 0.5 wt% of an antifoaming agent ( Triton (available from Air Pr〇ducts) and 1.0% by weight of a release agent, etc., to prepare a slurry, which was then pressed through a casting slurry to form a ceramic insulating layer strip having a thickness of 80 μm. Example 9: Ben The example is substantially the same as that of the example 4 except that the material of the ceramic insulating layer ribbon is only 85% by weight of glass-ceramic powder and 15% by weight of smectite glass. Filled into a ball mill jar, water was added to maintain the solids content to about 65% by weight. Thereafter, 8.5% by weight of an adhesive (polyvinyl alcohol, PVA), 3.0% by weight of a plasticizer (polyethylene glycol, PEG), 0.5% by weight of an antifoaming agent (Triton, purchased from Air Products) were added. The company) and 1% by weight of the release agent are specially prepared to form a slurry. Then, the blade is pressed and prayed to form a thin strip of (10) thick Tao competition insulation layer. Example 10: 99772.doc -20- 1290404 This example is substantially the same as Example 4 except that the material of the ceramic insulating layer ribbon is used. In this example, 42.5 wt% of oxidized (Zr02) powder, 42.5% by weight of giss-ceramic powder, and 15% by weight of saponin glass are filled into a ball mill jar, and added. Water was used to maintain the solids content to about 65% by weight. Thereafter, 8.5 wt% of an adhesive (polyvinyl alcohol 'pVA), 3.0 wt% of a plasticizer (polyethylene glycol, PeG), and 0.5 wt% of a foaming agent (Triton, available from Air Products) were added. And 1.0% by weight of a release agent or the like to prepare a slurry. A ceramic insulating layer strip having a thickness of 80 μm is formed by pressing the casting paste through a blade. The materials, methods and features of the present invention will be more apparent from the description of the above examples. It should be understood that the present invention, k h γ 4 , which is modified or changed without departing from the spirit of the invention, is intended to be protected by the present invention.
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