574163 A7 B7 五、發明說明（1 ) 發明背畺 (請先閱讀背面之注意事項再填寫本頁) 本發明傺關於用於電漿顯示面板（P D P s )中之介電形成 材料，特別地，關於用於在PDPs之高應變點之前玻璃面 板上形成透光介電層之介電組成物。 一般而言，PDP具有前玻璃面板，其上配置多個電極 ，以藉由其與配置於背玻璃面板（其以間隙與前玻璃面 板對立）上之電極合作，而産生電漿放電。在玻璃板上 形成透光介電層覆蓋電極，以維持産生之電漿放電。 通常，由鹼石灰玻璃或其他高應變點玻璃製成前玻璃 面板，而透光介電層由包括低熔點玻璃粉末之介電材料 形成，例如，高Pb含量玻璃粉末。在形成透光介電層時 ，介電材料在低熔點玻璃粉末之軟化點燃燒或烘烤，以 避免與電極金屬反應。 如此技藝所已知，介電材料具有許多種性質為重要的 ，如（1 )與玻璃面板相容之熱膨脹偽數，（2 ) 5 0 G - 6 0 0 °C 之燃燒溫度，（3)優良之燃燒去沫力，以製造具低氣泡量 之高透光度及高耐受電壓之介電層。 經濟部智慧財產局員工消費合作社印製 JP-A1 卜 21148專利掲示使用 PbO-B2 03 -Si02 _BaO 玻 璃之玻璃粉末之介電材料，其具有與高應變點玻璃面板 相容之熱膨脹傺數。P b 0 - B 2 0 3 - S i 0 2 - B a 0玻璃在通過 軟化點之黏度改變快速，因此，快速地去沫。 雖然使用P b 0 _ B 2 0 3 - S i 0 2 - B a 0玻璃粉末之介電材料 因為其優良去沫力而可提供具有高透光度之介電層，其 具有所製造介電層具有3 0 a m (微米）或更大之直徑之殘餘 大氣泡之問題。 一 3 一 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 574163 A7 B7 五、發明說明（） 發明概沭 本發明之目的為提供一種介電材料，其熱膨脹傺數與 高應變點玻璃面板相容，在約軟化點之溫度燃燒可去沫 ，及可提供透光介電層而無大氣泡殘留其中。 在某些玻璃中，如上逑通過軟化點之黏度改變快速之 PbO-B2 03 -Si〇2_BaO玻璃，本共同發明人發現，在燃 燒程序開始時之相當低溫度，氣泡幾乎均自玻璃驅除， 但是其中一些如殘留氣泡保留在玻璃中，殘留氣泡然後 在連續燃燒中玻璃溫度提高時膨脹成大氣泡。 為了改良上述之Pb0-B2 03 -Si02-Ba0玻璃，本共同 發明人嚐試一方面減少PbO-B2 〇3 _Si02 -BaO玻璃中之 PbO含量至24.5重量％或更少，以將通過軟化點之黏度變 化調整為相對稍慢。另一方面，嚐試增加BaO含量以補償 由於PbO含量減少而降低之熱膨脹傺數。 依照本發明，提供一種用於在電漿顯示面板中形成透 光介電層之介電組成物，其包括9ϋ_10ϋ重量％之玻璃粉 末及10重量％之陶瓷粉末，該玻璃粉末為本質上包括 基於重量百分比為15-45¾之BaO、20-45%之ZnO、15-35¾ 之 B2 〇3 、 3-15¾ 之 Si〇2 、及 0-24.5¾之 PbO之玻璃之 經濟部智慧財產局員工消費合作社印製 (請先閱讀背面之注意事項再填寫本頁) ;線· 粉末。 B a 0為調整高溫黏度以影響玻璃之去沫力，及提高玻 璃之熱膨脹偽數之元素。BaO之含量為15-45¾，較佳為 2 0 . 5 - 4 0重量。少於1 5 %之B a 0含量降低去沫力，而且亦 將生成玻璃之熱膨脹傺數降低至不與高應變點玻璃面板 相容之過低程度。如果BaO含量超過45%,則生成玻璃具 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 經濟部智慧財產局員工消費合作社印製 574163 A7 B7___ 3 ' 五、發明說明（） 有不與高應變點玻璃相容之過高熱膨脹像數。 ΖηΟ為降低軟化點及調整玻璃之熱膨脹傜數之元素。 ZnO之含量選擇為20-45重量％，較佳為2 2 - 4 2 %。在含量 選擇為少於20%時，無法得到ZnO之上述功能。在含量選 擇為超過45%時，過度地降低熱膨脹係數。 B2 〇3為加寬組成物之玻化範圍之玻璃形成元素，而 且應含15-40重量％，較佳為16-33S：。少於15%之B203 可能造成玻璃在燃燒時去玻化。在含量超過40¾時，玻 璃變成軟化點過高，使其難以在60Q°C或更低之溫度燃 燒。574163 A7 B7 V. Description of the invention (1) Invention back (please read the notes on the back before filling this page) The present invention is about the dielectric forming materials used in plasma display panels (PDPs), especially, Concerning a dielectric composition for forming a light-transmitting dielectric layer on a glass panel before a high strain point of PDPs. Generally speaking, a PDP has a front glass panel on which a plurality of electrodes are arranged to generate a plasma discharge by cooperating with electrodes disposed on the back glass panel (which is opposed to the front glass panel with a gap). A transparent dielectric layer is formed on the glass plate to cover the electrodes to maintain the generated plasma discharge. Generally, the front glass panel is made of soda-lime glass or other high strain point glass, and the light-transmitting dielectric layer is formed of a dielectric material including a low melting glass powder, for example, a high Pb content glass powder. When the light-transmitting dielectric layer is formed, the dielectric material is burned or baked at the softening point of the low melting glass powder to avoid reaction with the electrode metal. As is known in the art, it is important for dielectric materials to have many properties, such as (1) pseudo-expanding thermal expansion compatible with glass panels, (2) combustion temperature of 5 0 G-6 0 0 ° C, (3) Excellent combustion and defoaming ability to produce dielectric layer with low light volume, high light transmittance and high withstand voltage. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, JP-A1, 21148, the patent states that PbO-B2 03 -Si02 _BaO glass is used as the dielectric material of glass powder. P b 0-B 2 0 3-S i 0 2-B a 0 The viscosity of the glass changes rapidly after passing through the softening point, and therefore, it defoams quickly. Although P b 0 _ B 2 0 3-S i 0 2-B a 0 is used as the dielectric material of glass powder due to its excellent defoaming power, it can provide a dielectric layer with high light transmittance, which has the manufactured dielectric The layer has the problem of large residual bubbles with a diameter of 30 am (microns) or more. 1-3 The paper size is in accordance with the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 574163 A7 B7 V. Description of the invention () Summary of the invention The purpose of the present invention is to provide a dielectric material whose thermal expansion coefficient and The high strain point glass panel is compatible. It can be defoamed by burning at a temperature of about the softening point, and it can provide a light-transmitting dielectric layer without large bubbles remaining in it. In some glasses, such as PbO-B2 03 -Si〇2_BaO glass, which changes rapidly through the viscosity of the softening point as above, the co-inventors found that at a relatively low temperature at the beginning of the combustion process, bubbles are almost driven out of the glass, but Some of them, such as residual bubbles, remain in the glass, which then expands into large bubbles as the temperature of the glass increases during continuous combustion. In order to improve the above-mentioned Pb0-B2 03 -Si02-Ba0 glass, the co-inventors tried on the one hand to reduce the PbO content in PbO-B2 〇3 _Si02-BaO glass to 24.5% by weight or less in order to pass the softening point viscosity Changes are adjusted to be relatively slow. On the other hand, an attempt was made to increase the BaO content to compensate for the decrease in the thermal expansion coefficient due to the decrease in the PbO content. According to the present invention, a dielectric composition for forming a light-transmitting dielectric layer in a plasma display panel is provided. The dielectric composition includes 9ϋ-10ϋwt% glass powder and 10 wt% ceramic powder. 15-45¾ of BaO, 20-45% of ZnO, 15-35¾ of B2 03, 3-15¾ of Si02, and 0-24.5¾ of PbO glass Consumer Intellectual Property Cooperative of the Ministry of Economic Affairs Printed (please read the precautions on the back before filling this page); line · powder. B a 0 is an element that adjusts the viscosity at high temperature to affect the defoaming force of the glass and increase the pseudo-number of thermal expansion of the glass. The content of BaO is 15-45¾, preferably 20.5-40 weight. A Ba content of less than 15% reduces the defoaming force, and also reduces the thermal expansion coefficient of the generated glass to an excessively low degree which is not compatible with high strain point glass panels. If the content of BaO exceeds 45%, the size of the produced glassware is in accordance with the Chinese National Standard (CNS) A4 specification (210 X 297 mm) printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 574163 A7 B7___ 3 ) There are excessively high thermal expansion images that are not compatible with high strain point glass. Znη is an element that reduces the softening point and adjusts the thermal expansion coefficient of glass. The content of ZnO is selected from 20 to 45% by weight, preferably from 2 2 to 4 2%. When the content is selected to be less than 20%, the above functions of ZnO cannot be obtained. When the content is selected to exceed 45%, the thermal expansion coefficient is excessively reduced. B2 03 is a glass-forming element that widens the vitrification range of the composition, and should contain 15-40% by weight, preferably 16-33S :. Less than 15% of B203 may cause the glass to devitrify during combustion. When the content exceeds 40¾, the glass becomes too soft, making it difficult to burn at 60Q ° C or lower.
Si〇2亦為玻璃形成元素，而且應選擇為3-15重量％, 較佳為4-13¾之含量。如果Si02少於3%，生成之玻璃在 燃燒時易於去玻化。另一方面，使用超過15%之Si02過 度地提高生成玻璃之軟化點而過度地降低通過軟化點之 黏度變化，使得脫氣變為困難的。SiO2 is also a glass-forming element and should be selected to a content of 3-15% by weight, preferably 4-13¾. If SiO2 is less than 3%, the resulting glass is easily devitrified during combustion. On the other hand, using more than 15% of SiO2 excessively increases the softening point of the formed glass and excessively reduces the viscosity change through the softening point, making degassing difficult.
PbO為降低玻璃軟化點之元素，而且應選擇為0-24. 5 重量％，較佳為G-2U之含量。如果PbG之含量選擇為超 過24.5%，生成玻璃通過軟化點之黏度變化過度快速而 促進氣泡之生長，其造成殘餘大氣泡保留在燃燒層中。PbO is an element that lowers the softening point of the glass, and should be selected to be 0-24. 5 wt%, preferably G-2U content. If the content of PbG is selected to be more than 24.5%, the viscosity of the generated glass through the softening point changes excessively rapidly to promote the growth of bubbles, which causes residual large bubbles to remain in the combustion layer.
PbO、B2 03與Si02之重量含量應由（Pb(^(B2 03 + Si 02 ))之比例<1，較佳為0.9決定。在比例選擇為1或 更高時，生成玻璃通過軟化點之黏度變化過度快速而促 進氣泡之生長。燃燒層中之殘餘氣泡可能具有30微米或 更大之直徑。 此外，PbO與BaO之重量含量應由（Pb0/Ba0)之比例έ 一 5 - ϋ張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐^ ii I 看·11 ------訂---------線一 (請先閱讀背面之注意事項再填寫本頁) 574163 A7 _B7__ i 一 : 五、發明說明（） 1.5，較佳為1.3決定，以造成生成玻璃易於具有與高應 變點玻璃面板相容之熱膨脹傺數。 為了某些目的，可在玻璃中加入其他之成分，例如， 總量逹10%之CaO與MgO，以提高熱膨脹像數，及/或達2% 之CuO以防止Ag電極及透明介電層變色成為黃色，及使電 極成為籃色。 依照本發明之另一個狀態，玻璃粉末較佳為具有3 . 0 徼米（Ain)或更小之平均粒度D50，及20微米（#m)或更小 之最大粒度D m a X。如果平均粒度及最大粒度超過上限， 則在相鄰玻璃穎粒之間存在大間隙，其促進殘餘大氣泡 在燃燒介電層中之産生。 除了玻璃粉末，依照本發明之介電組成物可包括陶瓷 粉末，如氧化鋁、鉻、氧化鉻、及/或氣化鈦（鈦氯化物） ，以改良燃燒層之強度及調整其外觀。較佳為，陶瓷粉 末之最大粒度D m a X為1 5微米或更小。 i—ΓΙΙΓ.---.—— (請先閱讀背面之注意事項再填寫本頁) I---訂---------線 經濟部智慧財產局員工消費合作社印製 -6 - 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 5 574163 A7 B7 五、發明說明（） 經濟部智慧財產局員工消費合作社印製 表1 本發明 樣品號碼 1 2 3 4 5 玻璃粉末（W U ) PbO 10 10 - 4 2 0 B 2 〇 3 2 2 3 0 2 2 18 2 4 S io 2 7 4 6 7 7 Z nO 3 3 28 3 7 4 0 2 6 BaO 28 28 3 5 3 1 2 3 加入之陶瓷粉末 一· - - - - 量 （w t % ) - - - - - 轉移點（°C ) 49 5 5 0 0 5 15 50 5 485 軟化點（°C ) 5 9 5 6 0 0 620 6 10 5 9 0 熱膨脹傺數 7 7 7 7 82 7 6 7 5 (X 1 (Γ7 / oc ) 燃燒溫度（°c ) 580 5 9 0 6 0 0 5 9 5 5 7 0 燃燒層厚度（A ill) 3 2 3 1 28 2 9 3 4 透光度（％ ) 80 8 1 82 8 0 7 9 大氣泡數量 2 1 0 1 0 mm» ----------J---·丨丨丨丨丨丨丨訂·!---- (請先閱讀背面之注意事項再填寫本頁) 線 « 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 574163 ΚΙ Β7 - 五、發明說明（） 經濟部智慧財產局員工消費合作社印製 表 2 樣品號碼 本發明 比較例 6 7 8 9 玻璃粉末（W t. % ) PbO 2 3 15 15 3 3 B 2 〇 3 2 5 2 5 2 5 2 2 S i0 2 9 7 7 6 ZnO 2 6 3 3 3 3 2 1 B a 0 2 1 3 0 3 0 18 加入之陶瓷粉末 - 氧化鋁 - 量 （w t % ) - - 3 - 轉移點（°C ) 4 8 5 4 9 5 495 480 軟化點（°C ) 580 5 9 5 60 0 5 7 0 熱膨脹偽數 (X 1 (T7 / oc ) 7 4 7 5 7 5 7 5 燃燒溫度（°c ) 5 6 0 580 585 5 5 5 燃燒層厚度（A m) 3 3 3 1 2 9 28 透光度（％ ) 7 9 8 0 7 9 80 大氣泡數量 3 1 0 15 S- 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） ---、---.1 -----2-----------訂---------線一 (請先閱讀背面之注意事項再填寫本頁) 574163 A7 B7_ 五、發明說明（） 玻璃粉末及陶瓷粉末之含量各為90-100¾及o-m重量 比。如果陶瓷粉末含量超過1 〇 %，則燃燒之生成介電層散 射可見光射線，因而為不透明的。 以下敘逑本發明之實例。 表1及2展示本發明之實例（樣品第1 - 8號）及比較例 (樣品第9號）。 各樣品藉以下步驟製備。 對表1及2所示之各樣品摻合原料裝載，並且在1，300 °C 之鈉坩堝中熔化2小時。然後，將熔化玻璃形成薄板形 ，其依序壓碎及分類而得到具有3 . 0微米或更小之平 均粒度D50,及20微米或更小之最大粒度Dmax之玻璃粉 末。測量及記錄玻璃之轉移點及軟化點。第8號樣品之 玻璃粉末混合鋁粉以得到其混合粉末。 使用Nikki so有限公司製造之雷射繞射型粒度分布計 n Microtrack SPA”證實平均粒度D50及最大粒度Dmax。 對於各樣品，測量熱膨脹係數、燃燒溫度、燃燒層厚 度、及在550奈米波長之光譜透光度。亦進行存在於燃 燒層中之具有3 0微米或更大直徑之氣泡之計數。測量之 數據示於表1及2〇 由表1及2可見到，本發明實例之樣品第1 -8號具有 4 8 5 - 9 1 5 °C之玻璃轉移點及5 8 0 - 6 2 0 °C之軟化點、9 5 - 1 0 5 °C 之轉移點與軟化點間溫度差、74-82 X 1(T7 /°C之熱膨脹 係數、及5 7 0 - 6 0 G °C之燃燒溫度。燃燒層具有2 8 - 3 4微米 之厚度、在550奈米波長為79¾或更高之透明度、及其中 僅3個或更少之大氣泡。比較這些樣品，比較性樣品第 -9 - ^紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐") ---ί--Γ,------- (請先閱讀背面之注意事項再填寫本頁) 訂---------線； 經濟部智慧財產局員工消費合作社印製 574163 A7 B7 五、發明説明（β ) 9號具有4 8 0 °C之玻璃轉移點及5 7 0 °C之軟化點、小至9 0 °C 之轉移點與軟化點間溫度差。因此，在燃燒溫度範圍之 黏度變化太快而促進氣泡之生長。因此，燃燒層具有15 個大氣泡。 在測量玻璃轉移點及軟化點時，使用大型差式熱分析 儀，而旦各選擇第一舆第四個反曲點之值作為玻璃轉移 點及軟化點。 在3 0 - 3 0 0 °C之溫度範圍，依照J I S R 3 1 0 2測量由以下 步驟形成之樣品片之熱膨脹偽數。將各樣品粉末壓製成 形、燃燒、及研磨形成具有4毫米直徑及40毫米長度之 圓柱棒之樣品片。 以以下之方法得到燃燒層之厚度、透光度及大氣泡數量 。各樣品粉末在乙基纖維素之5 %荃烯醇溶液中混合，並 且使用三輥研磨機捏合以形成漿料，其依序藉網印法塗 佈而在高應變點玻璃面板（具有8 3 X 1 0 </ °C之熱膨脹偽 數）上得到30微米厚度之燃燒層，並且在電爐中在燃燒溫 度燃燒1 0分鐘。燃燒層之厚度使用數位測微計證實。 藉由將具有燃燒層之高應變點玻璃面板固定在光譜光 度計之樣品固定側，使用光譜光度計之積分球測量對於 550奈米波長之透光度。 使用體視鏡（30倍），進行在燃燒層表面之3公分X4公 分面積内見到之具有30微米或更大之直徑之大氣泡之計 數。 如上所述，本發明之介電組成物可用於在具有高應變 點之前玻璃面板上形成透光介電層，及覆蓋在前玻璃面 板上形成之電極。 _- 1 η -_;_ 本紙張又度適用中國國家標準（CNS ) Α4規格（210X 297公釐） (請先閱讀背面之注意事項再本頁) -5口 經濟部智慧財產局員工消費合作社印製The weight content of PbO, B2 03 and Si02 should be determined by the ratio (Pb (^ (B2 03 + Si 02)) < 1, preferably 0.9. When the ratio is selected to be 1 or higher, the resulting glass passes the softening point The viscosity changes excessively rapidly and promotes the growth of bubbles. The residual bubbles in the combustion layer may have a diameter of 30 microns or more. In addition, the weight content of PbO and BaO should be determined by the ratio of (Pb0 / Ba0). Dimensions are applicable to China National Standard (CNS) A4 specifications (210 X 297 mm ^ ii I see · 11 ------ order --------- line 1 (please read the precautions on the back before filling (This page) 574163 A7 _B7__ i One: V. Description of the invention () 1.5, preferably 1.3, to make the resulting glass easily have a thermal expansion coefficient compatible with high strain point glass panels. For some purposes, it can be used in glass Add other ingredients, for example, CaO and MgO in total ， 10% to increase the number of thermal expansion images, and / or 2% CuO to prevent the Ag electrode and the transparent dielectric layer from discoloring to yellow, and make the electrode a basket According to another aspect of the present invention, the glass powder preferably has a diameter of 3.0 mm (Ain) or more. The average particle size D50, and the maximum particle size D ma X of 20 microns (#m) or less. If the average particle size and the maximum particle size exceed the upper limit, there is a large gap between adjacent glass glazes, which promotes the remaining large bubbles in the Generation in a combustion dielectric layer. In addition to glass powder, the dielectric composition according to the present invention may include ceramic powders such as alumina, chromium, chromium oxide, and / or titanium dioxide (titanium chloride) to improve the combustion layer. Strength and adjust its appearance. Preferably, the maximum particle size D ma X of the ceramic powder is 15 microns or less. I—ΓΙΙΓ .---.—— (Please read the precautions on the back before filling this page) I --- Order --------- Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs-6-This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 5 574163 A7 B7 V. Description of the invention () Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economy 1 Sample number of the present invention 1 2 3 4 5 Glass powder (WU) PbO 10 10-4 2 0 B 2 〇3 2 2 3 0 2 2 18 2 4 S io 2 7 4 6 7 7 Z nO 3 3 28 3 7 4 0 2 6 BaO 28 28 3 5 3 1 2 3 Ceramic powder added-----Amount (wt%)-----Transfer point (° C) 49 5 5 0 0 5 15 50 5 485 Softening point (° C) 5 9 5 6 0 0 620 6 10 5 9 0 Thermal expansion coefficient 7 7 7 7 82 7 6 7 5 (X 1 (Γ7 / oc) Combustion temperature (° c) 580 5 9 0 6 0 0 5 9 5 5 7 0 Burning layer thickness (A ill) 3 2 3 1 28 2 9 3 4 Transmittance (%) 80 8 1 82 8 0 7 9 Number of large bubbles 2 1 0 1 0 mm »---------- J --- · 丨 丨 丨 丨 丨 丨 丨 Orders! (Please read the precautions on the back before filling this page) Line «This paper size applies to China National Standard (CNS) A4 (210 X 297 (Mm) 574163 KI Β7-V. Description of the invention () Printed by the Consumers' Cooperative of Intellectual Property Bureau of the Ministry of Economics 2 Sample number Comparative example 6 7 8 9 Glass powder (W t.%) PbO 2 3 15 15 3 3 B 2 〇3 2 5 2 5 2 5 2 2 S i0 2 9 7 7 6 ZnO 2 6 3 3 3 3 2 1 B a 0 2 1 3 0 3 0 18 Ceramic powder added-Amount (wt% )--3-Transition point (° C) 4 8 5 4 9 5 495 480 Softening point (° C) 580 5 9 5 60 0 5 7 0 Heat Expansion pseudo number (X 1 (T7 / oc) 7 4 7 5 7 5 7 5 Burning temperature (° c) 5 6 0 580 585 5 5 5 Burning layer thickness (A m) 3 3 3 1 2 9 28 Transmittance (%) 7 9 8 0 7 9 80 Number of large bubbles 3 1 0 15 S- The size of this paper is applicable to China National Standard (CNS) A4 (210 X 297 mm) ---, ---. 1 --- --2 ----------- Order --------- Line 1 (Please read the precautions on the back before filling this page) 574163 A7 B7_ V. Description of the invention () Glass powder And the content of ceramic powder is 90-100¾ and om weight ratio. If the content of the ceramic powder exceeds 10%, the dielectric layer formed by the combustion diffuses visible light rays and is therefore opaque. Examples of the present invention are described below. Tables 1 and 2 show examples (Sample Nos. 1 to 8) and comparative examples (Sample No. 9) of the present invention. Each sample was prepared by the following steps. The sample blending materials shown in Tables 1 and 2 were loaded and melted in a sodium crucible at 1,300 ° C for 2 hours. Then, the molten glass is formed into a thin plate shape, which is sequentially crushed and classified to obtain glass powder having an average particle size D50 of 3.0 microns or less and a maximum particle size Dmax of 20 microns or less. Measure and record the transition and softening points of the glass. The glass powder of sample No. 8 was mixed with aluminum powder to obtain its mixed powder. The laser diffraction type particle size distribution meter n Microtrack SPA manufactured by Nikki So Co., Ltd. was used to confirm the average particle size D50 and the maximum particle size Dmax. For each sample, the thermal expansion coefficient, the combustion temperature, the thickness of the combustion layer, and the wavelength at 550 nm were measured. Spectral transmittance. Counting of air bubbles with a diameter of 30 microns or more existing in the combustion layer is also performed. The measured data are shown in Tables 1 and 20, which can be seen from Tables 1 and 2. No. 1-8 has a glass transition point of 4 8 5-9 1 5 ° C and a softening point of 5 8 0-6 2 0 ° C, a temperature difference between the transition point and the softening point of 9 5-1 0 5 ° C, 74-82 X 1 (The thermal expansion coefficient of T7 / ° C, and the combustion temperature of 5 7 0-60 G ° C. The combustion layer has a thickness of 2 8-3 4 microns and a wavelength of 79¾ or higher at 550 nm Transparency, and only 3 or less large bubbles. Comparing these samples, the comparative sample No.-9-^ Paper size applies Chinese National Standard (CNS) A4 (210 X 297 mm ") --- ί--Γ, ------- (Please read the notes on the back before filling this page) Order --------- line; Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the employee consumer cooperative 574163 A7 B7 V. Description of the invention (β) No. 9 has a glass transition point of 480 ° C and a softening point of 570 ° C, between the transition point and softening point as small as 90 ° C Temperature difference. Therefore, the viscosity changes too fast in the combustion temperature range to promote the growth of bubbles. Therefore, the combustion layer has 15 large bubbles. When measuring the glass transition point and softening point, use a large differential thermal analyzer, and once Each selected the value of the first inflection point as the glass transition point and the softening point. In the temperature range of 30-300 ° C, the thermal expansion of the sample piece formed by the following steps was measured in accordance with JISR 3 1 2 Pseudo-numbers. Each sample powder is pressed into shape, burned, and ground to form a sample piece of a cylindrical rod with a diameter of 4 mm and a length of 40 mm. The thickness, light transmittance, and number of large bubbles of the combustion layer are obtained by the following methods. Each sample The powder was mixed in a 5% quinol alcohol solution of ethyl cellulose and kneaded using a three-roll mill to form a slurry, which was sequentially coated by screen printing on a high strain point glass panel (having 8 3 X 1 0 < / ° C thermal expansion A pseudo-number) was obtained on the combustion layer with a thickness of 30 micrometers and was burned in an electric furnace at the combustion temperature for 10 minutes. The thickness of the combustion layer was confirmed using a digital micrometer. By fixing a high strain point glass panel with the combustion layer on the spectrum The spectrophotometer's integrating sphere was used to measure the light transmittance at a wavelength of 550 nm using a spectrophotometer's integrating sphere. Using a stereo microscope (30x), it was found to have an area of 3 cm x 4 cm on the surface of the combustion layer. Counts of large bubbles with a diameter of 30 microns or larger. As described above, the dielectric composition of the present invention can be used to form a light-transmitting dielectric layer on a glass panel before having a high strain point, and to cover an electrode formed on a front glass panel. _- 1 η -_; _ This paper is again applicable to Chinese National Standard (CNS) Α4 size (210X 297 mm) (Please read the precautions on the back before this page) Print