200911390 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種塗布頭清淨方法，其係將黏膠帶推 壓於該塗布頭以去除附著於塗布頭噴出口附近的塗布液或 塗布糊。 【先前技術】 近年來’ DC型及AC型電漿顯示器之開發已提昇，也 業已上市’正逐漸形成大的市場。於電漿顯示器中，已形 成具有像素隔離等各種機能的構造物。例如，A C型電漿顯 示器爲’在前面基板與背面基板之間所具備之放電空間內 ’使對向之陽極與陰極的電極間產生電漿放電，藉由將從 放電空間內所封入之Xe-Ne混合氣體等之放電氣體產生的 、172nm波長極短之紫外線照射於設置在放電空間內 的螢光體而進行顯示。 其構造物係將放電之擴大抑制於一定領域內，在規定 之元件內進行顯示的同時，並且爲了確保均勻的放電空間 而予以設置，已被稱爲隔壁（也稱爲障壁、棱）。一般而 言’隔壁之形狀可列舉：寬度約爲20〜120 # m、高度50 〜250/zm之帶狀或格子狀之物等。而且，螢光體係藉由作 成以螢光體粉末、有機黏結劑與有機溶劑爲主要成分之螢 光體糊，於既定之隔壁間予以塗布，因應需要加以乾燥、 焙燒而形成螢光體層。將螢光體糊塗布於既定之隔壁間的 方法，可列舉：網版印刷法、分散器法（也有稱爲噴嘴法 之情形）’材料損失少的分散器法已受到注目。 200911390 將利用分散器法所進行之螢光體糊塗布方法的示意圖 顯示於第3圖。所謂分散器法，係指於塗布頭1之內部’ 具有貯備螢光體糊2之空間（集流腔），對向於基板3進 行相對移動的同時，藉由通過連接於其空間的加壓配管4 ，導入受壓力控制之壓縮空氣，並藉由從噴出口 5將螢光 體糊2向隔壁間內噴出，以進行塗布之塗布方法。因爲是 進行各基板之間歇塗布，故於每次塗布開始之際’精度佳 地重複從塗布頭噴出糊且穩定進行係重要的。 此利用分散器法所進行之螢光體糊的塗布係一種片狀 方式之塗布，在一片基板上進行塗布之後，停止從噴出口 5噴出螢光體糊2，此時，殘留糊容易附著於噴出口 5附近 的噴出口面6(包含塗布頭噴出口之面）。若是在進行下 次塗布之前，殘留糊或異物附著於噴出口 5附近的噴出口 面6，或是在噴出口 5附近的噴出口面6具有刮傷、凹陷等 之損傷時，於再次塗布時，將有所謂產生噴出量之偏差， 或是糊之噴出行爲紊亂等，塗布容易成爲不穩定之問題。 其結果，因爲塗布品質大幅受損，不良品將大量發生而不 佳。 因此’於塗布前，預先使含有噴出口 5之噴出口面6 形成充分清淨之狀態係重要的。亦即，塗布前之塗布頭的 清淨係不可或缺的。如此塗布頭之清淨方法，可知習知係 將拭除構材推壓於噴出口面的同時，摩擦以拭除殘留糊或 異物的方法（參照專利文獻1 )。此係如第4圖所示，一 面利用推壓構材1 〇，將編織物所構成的拭除構材9推壓於 200911390 噴出口面6，並一面於一定方向11進行摩擦，藉由摩擦而 拭除附著於噴出口 5與噴出口面6之殘留糊8的方法。特 別是在以提高拭除效果爲目的方面，例如，可知利用丙酮| 等之清淨溶劑而使超極微細纖維之編織物一邊濕潤一邊使 用之拭除方法。 但是，此方法除了有所謂的拭除效果高的超極微細纖 維之編織物成本高的問題之外，還會因爲藉由使由拭除構 材所拭除螢光體糊中所含之螢光體粉末等之無機粉末與噴 出口面相接觸之狀態下進行摩擦，而在塗布頭表面產生如 第5圖所示之刮傷1 2的問題。若於塗布頭產生如此之刮傷 時，於塗布開始時間點，塗布液的噴出行爲容易變得不穩 定，因爲塗布品質將大幅受損，變得不得不與無刮傷之塗 布頭作交換。 而且，一般而言，於分散器法之塗布頭1中加工有約 1 000〜4000個，直徑爲50〜200 Ai m之高精度微細噴出口 5 ，因爲非常昂貴，故因刮傷之發生所造成之如此塗布頭的 交換將明顯增大電漿顯示器面板之製造成本而不佳。 另一方面，可知並非使用編織物加以拭除的方法，而 是使用刮刀刮除附著於噴出口附近的噴出口面之螢光體糊 而加以清淨的方法（參照專利文獻2 )。但是，因刮刀所 進行之刮除，調整繁雜，且因刮刀磨損所造成之塵埃發生 容易成爲問題。另外’因爲會有刮刀或由刮刀所刮除之螢 光體糊中所含螢光體粉末等無機粉末，在塗布頭噴出口附 近的噴出口面產生刮傷之虞，故依然不佳。 200911390 另外，爲了解決因刮除所造成之噴出口損傷問題’可 知習知技術爲，藉由將噴射用低黏度低濃度之塗布液少量 噴塗於噴墨噴嘴的噴出口面，利用塗布液之潤滑作用而防 止刮刀之磨損及噴出口面刮傷之技術（參照專利文獻3) 。然而，如同螢光體糊般’在以高濃度方式含有固體微粒 的高黏度糊之情形’塗布液之潤滑作用不足’反而造成使 刮刀之磨損與噴出口面之刮傷惡化。 另一方面，可知一種習知技術（參照專利文獻4 ) ’ 其係爲了防止因如此之摩擦所造成之噴出口面的刮傷，利 用橡膠等之推壓構材以約略垂直地把由多孔質吸附材所構 成的清淨材推壓在噴射噴嘴之噴出口面上之後，再加以剝 離。然而，如同螢光體糊般，以高濃度方式含有固體微粒 的高黏度糊之情形，僅推壓多孔質吸附劑之情形，不會引 起充分之吸收、轉印，清淨不良將發生。 再者，可知一種習知技術（參照專利文獻5 )，其係 藉由將具有溶劑吸收能力之黏膠帶接觸於螢光體糊所附著 之塗布頭噴出口面，吸收來自殘留糊之溶劑成分而使殘留 糊固化，從被清淨材表面，利用黏接力以剝離轉印其固化 之糊。 而且，將如此之黏膠帶安裝於與專利文獻4揭示之裝 置同樣的塗布頭清淨裝置，利用與專利文獻1揭示之裝置 同樣的螢光體塗布裝置進行塗布之結果，螢光體糊無法完 全去除，塗布品質明顯受損。即使延長黏膠帶之推壓時間 ，或重複數次之推壓次數，不僅無法完全解決去除不良， 200911390 相反的也有惡化之情形。詳細分析現象之結果，得知如 下之事實： 第6圖係顯示於僅進行1次推壓動作之清淨方法中之 噴出口附近的殘留糊附著狀態的示意圖。首先，使用與專 利文獻1揭示之裝置同樣的習知型式的塗布頭清淨裝置， 如第6 ( a )圖所示，將噴出口附近予以清淨化之後，在形 成有隔壁的基板上，正常塗布螢光體糊。觀察塗布後之塗 布頭噴出口面6後，如第6(b)圖所示，殘留糊8a〜8c係 作成形狀、量皆呈不規則地偏差的積存塗布液而加以附著 。進行數次塗布之後，殘留糊之附著狀態每次不同。 接著，對於附著有上述不規則偏差的積存塗布液之噴 嘴噴出口面6，利用與專利文獻4揭示之裝置同樣的平坦 橡膠推壓構材，將黏膠帶推壓於噴出口面以實施轉印之後 ，觀察清淨後之噴嘴噴出口面後’確認了顯示於如第6 ( c )圖之下列狀況： 在有少量殘留糊8 a附著的部分’於黏膠帶推壓期間， 溶劑被黏膠帶所吸收，藉此而固化後之糊將薄薄且牢固地 附著於噴出口附近的噴出面’而殘留黏著狀態之黏附物1 3 a 。另一方面，在有大量殘留糊8b附著的部分’因推壓黏膠 帶期間的溶劑吸收所進行之固化將無法充分，薄的液狀糊 將殘留而殘留有濕潤狀態之黏附物1 3b °亦即’發現發生狀 態不同的二種轉印不良。在有中等程度量殘留糊8 c附著的 部分，不會發生轉印不良，成爲轉印良好部分1 3 c。 爲了進一步去除濕潤狀態之黏附物’若再次實施黏膠 200911390 帶之推壓時，雖然能去除濕潤狀態 成爲黏著狀態之附著物的部分而曰 固地附著於噴嘴噴出口面’之後’ 也無法去除。 因此，針對殘留糊量與去除其 之推壓保持時間之關係的結果’得1 。亦即，在殘留糊量少的情形’適 在殘留糊量多的情形，適合長的推 配合附著有少量殘留糊的部分而_ 使其附著有少量殘留糊的部分=_ 的，在有中等程度量殘留糊附著的 著的部分，濕潤狀態之黏附物將殘 殘留糊的部分上之轉印不良將惡化 時間係指將黏膠帶抵接於噴出口附 到剝除爲止之時間。 接著’若配合附著有大量殘留 間的話，附著有大量殘留糊的部分 反的’在有中等程度量殘留糊附著 附著的部分，黏著狀態之黏附物將 留糊附著的部分之轉印不良將惡化 經發明人等探討針對上述二種 討清淨條件的結果，獲致下列之結 疋其重複之情形亦無法去除所有上 。於是，更進一步進行探討之結果 之黏附物，但以一次就 ，已固化之糊將更加牢 即使嚐試使用黏膠帶， 量之殘留糊，探討最適 知二者具有正的相關性 合短的推壓保持時間； 壓保持時間。因此，若 短推壓保持時間的話， 印不良予以改善，相反 部分或有大量殘留糊附 留’尤其在附著有大量 。還有，所謂推壓保持 近的噴出口面之後，直 糊的部分而加長推壓時 之轉印不良將改善，相 的部分或有少量殘留糊 殘留，尤其在有少量殘 〇 轉印不良皆具效果之探 論：以一項清淨條件或 述不規則附著的殘留糊 ’終於達成發明本技術 -10- 200911390 專利文獻1 :日本專利特開2002-126599號公報 專利文獻2 :日本專利特開2004-0 1 4393號公報 專利文獻3 :日本專利特開2006-247 95 6號公報 專利文獻4 :日本專利特開2004-3 3 0027號公報 專利文獻5 :日本專利特開200 1 -35 3 85 6號公報 【發明内容】 發明所欲解決之技術問題 本發明之目的在於提供一種塗布頭的清淨方法、使用 該方法之糊塗布方法及電漿顯示器之製造方法，其中該塗 布頭的清淨方法係使用黏膠帶而能夠有效率且不會損傷塗 布頭地去除附著於塗布頭噴出口與噴出口面之塗布液。 雔決問顆之技術手段 用以解決上述課題之技術手段爲’一種塗布頭的清淨 方法，係清淨附著於塗布頭噴出口附近的噴出口面之塗布 液；其特徵在於：使黏膠帶接近約略垂直於該噴出口附近 的噴出口面方向並在抵接後，於約略垂直方向進行一次以 上之抽離用的推壓動作，之後進行從該噴出口微量噴出塗 布液之微量噴出動作，進一步使黏膠帶接近約略垂直於該 噴出口附近的噴出口面方向並在抵接後’於約略垂直方向 進行一次以上之抽離用的推壓動作。 若根據本發明，即使是附著有習知清淨技術中所無法 去除的呈不規則偏差之積存塗布液的噴嘴噴出口面’亦能 夠轉包含使用黏膠帶之一次推壓動作或重複其操作也無法 -11 - 200911390 徹底去除的殘留塗布液印去除，除了能夠乾淨地清淨之外 ，因爲不摩擦故亦不會刮傷。 右根據本發明’藉由在微量噴出動作之前進行一次以 上之抽離用的推壓動作，在有大量殘留塗布液附著的部分 ，將殘留濕潤狀態之薄的附著物；有中等程度量之殘留塗 布液附著的部分，將被乾淨拭除；而有少量之殘留塗布液 附著的部分，將殘留黏著狀態之薄的附著物。接著，根據 /其次進行的微量噴出動作，而形成大小一致且小的積存塗 布液。之後’藉由進行一次以上之推壓動作，根據微量噴 出動作所形成的積存塗布液將被去除。此時，利用微量噴 出動作前之推壓動作所殘留之薄的濕潤狀態之附著物，係 連同積存塗布液一起透過之後的推壓動作而予以去除。另 外’因爲藉微量噴出動作前之推壓動作而牢固地黏著的部 分也連接於積存塗布液，因而爲濕潤狀態，故利用之後所 進行的推壓動作予以去除。而利用微量噴出動作前之推壓 [ 動作所能夠去除的部分，會有積存塗布液重新附著但利用 之後所進行的推壓動作予以去除。 若根據本發明，即使是附著有習知黏著轉印技術中無 法去除之不規則偏差的大小殘留塗布液的噴嘴噴出口面， 也能夠從噴出口附近乾淨地去除殘留糊。 另外，用以解決上述課題之技術手段爲一種塗布頭清 淨方法’其係於各推壓動作中，使該黏膠帶介於中間而與 塗布頭噴出口面相對之方式，來推壓由彈性體所構成的推 壓構件。 -12- 200911390 另外，如上述揭示之塗布頭清淨方法，其中該塗布液 爲螢光體糊。 另外，一種塗布頭清淨方法，該塗布頭係電漿顯示器 製造用之螢光體塗布噴嘴。 另外，一種糊塗布之方法’其特徵在於：利用該塗布 頭清淨方法清淨塗布頭之後，從塗布頭噴出塗布液以進行 塗布。 再者’ 一種電駿顯示器之製造方法，其特徵在於：利 用該糊塗布方法以形成螢光體層。 【發明之效果】 若利用本發明之塗布頭清淨方法時，不但爲簡易方法 時且能從塗布頭噴出口面確實去除殘留塗布液，故能夠提 供一種低成本且簡易之塗布頭清淨方法。另外，因爲並不 藉由清淨材摩擦塗布頭之噴出口面，所以不會損傷塗布頭 之噴出口面，具有所謂昂貴的塗布頭之壽命顯著延長的期 望效果。 【實施方式】 【發明之實施形態】 本發明係關於一種塗布頭清淨方法，其係具有下列步 驟：將該黏膠帶推壓於塗布頭，接著，藉由從該塗布頭抽 離以去除附著於塗布頭噴出口附近的噴出口面之塗布液。 於本發明中，所謂塗布頭係指構成塗布裝置之塗布噴 嘴或噴頭等之構材，其中具有爲了噴出塗布液之噴出口的 構材。另外，所謂噴出口係指已供應至塗布頭之塗布液朝 -13- 200911390 向被塗布物所噴出的開口。再者，所謂噴出口面係指包含 塗布頭外面中之噴出口周圍部之面，亦即，噴出口將開口 之面。另外，所謂噴出口附近係噴出口外圍之附近區域， 若在此區域殘留塗布液之狀態下加以塗布時，塗布品質將 顯著受損。 噴出口可以爲單數或複數，也可以爲如狹縫狀、圓形 、橢圓形或多角形等任意形狀皆可，塗布頭爲後述之電漿 顯示器用螢光體的塗布頭之情形，以針對各色至少1次噴 出之方式，能夠塗布於電漿顯示器中1畫面所必要的螢光 體層之方式，較佳爲將按照掃描方向的像素數之數目以上 的數目（約1 000〜4000個）之圓形噴出口（直徑約50〜 2 0 0 /z m )配列於塗布頭長邊方向所具備之塗布頭。 於本發明中，所謂推壓動作係指將上述之黏膠帶抵接 於約略垂直於噴出口面的方向，保持一定時間，且藉由使 黏膠帶之黏結劑吸收塗布液中之溶劑後而固化塗布液，約 略垂直方向加以抽離，將固化之塗布液從噴出口面轉印至 黏膠帶並加以去除。藉由相對於噴出口面，抵接於約略垂 直方向，不摩擦地加以保持’從約略垂直方向抽離，不刮 傷塗布頭而能夠有效率地去除已附著於噴出口面之塗布液 〇 本發明之塗布頭清淨方法較佳爲將電漿顯示器製造用 螢光體塗布噴嘴作爲塗布頭使用，並將螢光體糊作爲塗布 液使用。以下，說明使用電漿顯示器製造用螢光體塗布噴 嘴以塗布螢光體糊之情形的塗布頭清淨方法之例子，但是 -14- 200911390 本發明並不受此例子所限定。 第1圖係顯示本發明之塗布頭清淨方法之實施形態的 示意圖。第1(a)圖係示意顯示使用推壓構材10將黏膠帶 14推壓於附著在塗布頭1之噴出口面6上的殘留糊8之動 作。第1(b)圖係顯示與第l(a)圖之長邊方向垂直之面 的剖面，皺褶展平導向裝置1 5防止在推壓構材1 0之前後 ，黏膠帶中發生皺褶、鬆弛之樣子。 第1(c) 、（d)圖係顯示從第1(a) 、（b)圖之抵 接狀態起經過一定時間後，從噴出口面6剝離黏膠帶1 4之 狀態’示意顯示殘留糊8轉印至黏膠帶1 4之樣子。作爲在 推壓動作中控制之推壓條件有：推壓之壓力、推入量、推 壓保持時間、推壓構材彈性率等，最爲重要的是推壓保持 時間。 如上所述，實驗結果得知：殘留糊量與推壓保持時間 具有正的相關關係，在殘留糊量少的情形，適合短的推壓 保持時間；殘留糊量多的情形，適合長的推壓保持時間。 本發明之塗布頭清淨方法爲，在對基板塗布後，爲了 清淨不規則紊亂而殘留於塗布頭噴出口附近的糊，首先， 如第1圖所示，將黏膠帶抵接於約略垂直於噴出口面的方 向’使塗布液予以槪略固化後，進行約略垂直方向剝離的 第1次推壓動作。於第1次推壓動作使用之推壓條件能夠 配合殘留糊之狀況而加以適當設定。根據第1次推壓動作 ’在有·大量殘留糊附著的部分會殘留濕潤狀態之薄的附著 物’·有中等程度量殘留糊附著的部分，將乾淨地拭除；有 -15- 200911390 少量殘留糊附著的部分將殘留黏著狀態之薄的附著物。在 如下所說明之微量噴出動作之前進行的推壓動作宜爲一次 ，必要時，也可以進行二次以上。 第2圖係顯示於本發明之清淨方法中之噴出口附近的 殘留糊附著狀態的示意圖。第2 ( a )圖係顯示進行微量噴 出動作前的噴出口面殘留糊附著狀態之圖形。根據於進行 微量噴出動作前所進行的1次以上之推壓動作’而存在著 殘留糊乾淨被去除之轉印良好部分1 3 c、殘留有黏著狀態之 黏附物1 3 a的部分、以及殘留有潤濕狀態之黏附物1 3 b的 部分。 接著，從噴出口進行微量噴出塗布液之微量噴出動作 。第2 ( b )圖係顯示進行微量噴出動作後之噴出口面的殘 留糊附著狀態之圖形。根據微量噴出動作’大小正確且均 勻控制之少的積存塗布液1 7將形成於噴出口面6之噴出口 5周邊部。原本塗布頭中普遍具備高精度且均勻噴出糊之 機能，並無需爲了微量噴出動作而另外設置特別設備’設 置微量噴出動作之設定即可。微量噴出之設定條件能配合 糊黏度與噴出口之流阻而加以適當設定。例如’適合使用 噴出壓300〜lOOOkPa、加壓時間0.01〜Is等。微量噴出宜 以覆蓋噴出口之方式來形成積存塗布液’但是並不受該條 件所限定，至少於推壓時，糊是覆蓋噴出口即可。 接著，根據於微量噴出動作之後進行的推壓動作’在 微量噴出動作之前所殘留之薄的濕潤狀態之附著1物1 3b # 與積存塗布液1 7 —起被去除。由於在微量噴出動作之則所 -16 - 200911390 殘留的黏著狀態之黏附物1 3 a係藉由與積存塗布液接觸而 成爲濕潤狀態，故利用於微量噴出動作之後所進行的推壓 動作而容易予以去除。根據在微量噴出動作之前所進行的 推壓動作而能夠乾淨去除之轉印良好部分丨3 c中，雖然重 新形成積存塗布液1 7，但是因爲配合根據微量噴出動作所 形成的積存塗布液1 7之殘留糊量，而設定於微量噴出動作 之後所進行的推壓動作之推壓保持時間，所以予以確實去 除。 如此一來，即使是附著有習知之黏著轉印技術所無法 去除之不規則偏差之大小殘留糊的噴嘴噴出口面，也能夠 從噴出口附近乾淨去除殘留糊。還有，於微量噴出動作之 後所進行的推壓動作以1次爲宜，必要時也可以進行2次 以上。 然而，黏著狀態的附著物之中，要利用微量噴出動作 後之推壓動作予以去除的也只有是根據利用微量噴出動作 所形成的積存塗布液而成爲濕潤狀態的噴出口附近而已， 故有時在離開噴出口位置之黏著狀態的一部分附著物會有 維持殘留之情形。但是，即使在那情形下，也因爲能以不 影響塗布之方式適當調整積存塗布液17之大小以充分達 成噴出口附近的清淨，所以並無問題。 積存塗布液之大小最好根據塗布頭之噴出口徑、噴出 口間之距離亦即噴出口間距而加以適當設定，例如，相對 於PDP螢光體塗布用噴嘴之情形的適宜噴出口徑50〜 200//m、噴出口間距1〇〇〜l〇〇〇/zm，如此之積存塗布液17 -17- 200911390 之大小較佳爲距離噴出口外緣1 0 v m 。若較1 Ο # m爲小時，噴出口附近的 復噴出時，將發生噴出量之偏差，或 糊的形狀容易使塗布變得不安定。若 變得難以利用在微量噴出動作之後所 均勻去除。積存塗布液17之大小更 50/zm以上、50〇em以下。 再者，積存塗布液大小之偏差宜 爲Ιμιη以上、lOOym以下。爲了得3 ，需要非常複雜且昂貴之噴出量控制 差較1 0 0 // m爲大時，變得難以藉微量 的推壓動作加以均句去除。 以下，針對影響在推壓動作所用 種要件加以說明，推壓條件之設定並 ，推壓次數亦可以加以適當設定。 推壓保持時間較佳爲0.1〜1 0秒 因爲糊無法充分固化，變得容易發生 1 0秒爲長時，因爲糊被過度固化，故 印不良。更佳爲0.5〜5秒。 爲了使上述之推壓得以更爲確實 面側起，與塗布頭噴出口面相向之方 於約略垂直方向以抵接黏膠帶，若將 材之抵接面時，則更爲理想。 在使用推壓構材之情形，例如， 以上、1000#m以下 清淨並不充分，於恢 是容易紊亂所噴出之 較1 000 // m爲大時， 進行的推壓動作進行 佳爲距離噴出口外緣 越小越好，偏差較佳 4較1 // m爲小的偏差 手段而不理想。若偏 噴出動作之後所進行 之推壓條件設定的各 不受此等設定所限定 。若較0 . 1秒爲短時’ 濕潤轉印不良。若較 變得容易發生黏著轉 ，較佳爲從黏膠帶背 式來將推壓構材推壓 彈性體設置於推壓構 如第1圖所示，藉由 -18- 200911390 隔著黏膠帶1 4而使黏膠帶之黏結劑層推壓於黏膠帶1之噴 出口面6之方式來移向相對於噴出口面6的約略垂直方向 ’以進行推壓構材1 0之推壓，使附著於噴出口 5附近的噴 出口面6之殘留糊8附著於黏結劑層，接著藉由從噴出口 面6抽離黏膠帶14’能夠去除附著於噴出口面6之殘留糊 8。從噴出口面6抽離黏膠帶14之際，使推壓構材1 〇相對 於噴出口面6得以在約略垂直方向遠離之方式來抽離。若 對黏膠帶1 4賦與稍高之張力並快速抽離時，其效果大。 較佳之推壓壓力（接觸壓）爲0.01〜IMPa。若接觸壓 較0.0 1 Μ P a爲小的話，糊之均勻轉印將變得不充分。另外 ’若較1 MPa爲大的話’因爲對接觸壓機構產生莫大的負荷 而不佳’且因爲容易對塗布頭造成損傷故不理想。更佳爲 0.05〜0.3MPa。針對接觸壓之測定，例如，可使用日本富 士照片薄膜公司製之感壓片（商品名Pres cal )等。或是藉 由將接觸壓感測器組合設置於推壓構材內，並將接觸壓量 測結果回授至接觸壓動作之控制器，能夠得到均勻的接觸 壓。 如此之接觸壓特別適合於塗布頭對彈性體推壓構件的 推入量成爲0〜5 m m之情形實現。若推入量未滿0時，容 易發生不產生接觸壓之狀態。若較5mm爲大時，因爲塗布 頭中變得容易發生損壞而不理想。 構成推壓構材之彈性體，能夠使用各種材料，但宜爲 橡膠。雖然能夠使用各種橡膠，但宜爲即使重複抵接也不 會受到殘留變形等之損傷而恢復快者。如此橡膠之一例， -19- 200911390 例如，可列舉：矽橡膠或天然橡膠。 另外，較佳爲即使糊附著也不容易劣化的橡膠材質。 在無法選擇像糊與橡膠材質這樣的適宜組合之情形，也可 以在橡膠表面設置覆蓋薄膜（cover tilm)等。 橡膠之硬度宜爲A20〜A60度（JIS K 6253 (2006)) 。若較A 2 0度爲小時，接觸壓將有不足的傾向，變得容易 發生濕潤轉印不良。另外，若較A 2 0度爲大時，不僅彈性 受損，均勻的接觸壓也將無法得到，因爲於塗布頭中變得 容易發生損傷而不理想。更佳爲A30〜A40度。 若推壓構材抵接面之橡膠硬度偏差爲大時，因爲無法 得到均勻的接觸壓，硬度偏差越小越好，較佳爲20度以下 。若爲10度以下的話，更爲理想。 於塗布頭中噴出孔設置成列狀之情形，推壓構材之抵 接面的真直度爲1mm以下時，因爲均勻的接觸壓變得容易 得到而較佳。若爲0.5 m m以下時，依然適宜。另外，若推 壓構材之抵接面的表面粗糙度爲0.5 mm以下時，因爲均勻 的接觸壓變得容易得到而較佳。若爲0.1mm以下時，依然 適宜。 另外，橡膠厚度適宜爲1〜30mm，更佳爲5〜15mm。 較1 mm爲小的情形，彈性將受損而無法得到適度之接觸壓 。較30mm爲大的情形，除了不必要的材料變多之外，裝 置變大而不經濟。 若推壓構材之抵接面的剖面形狀爲凸形時，尤其，因 爲能夠確實達成重要的噴出口部之接觸壓而較理想。若爲 -20- 200911390 平面或凹形時，變得容易發生接觸壓不 想。尤其，若抵接面之形狀爲圓筒面的 情形下，在排成一列的噴出口附近’接 ，因爲向噴出口周圍部擴大’也因爲糊 化而較理想。另外，若抵接面之形狀爲 ，抵接面之加工變得容易，其結果，因 理想。 圓筒面之直徑宜爲1〇〜1000mm。若 因爲噴出口位置容易偏離圓筒之頂點， 切之壓力施加於噴出口故不理想。若較 因爲凸形之效果減弱，變得容易發生接 不理想。若圓筒面之直徑爲20〜100mm 之頂點與噴出口位置重疊時，因爲接觸 依然適宜。雖然圓筒之頂點與噴出口位 ，但宜爲5mm以下，更佳爲2 mm以下 針對本發明之推壓動作的動作速度 〜100mm/s、剝離強度爲10〜1000mm/s 地轉印。 能夠適用於本發明之黏膠帶係以與 張力較糊或糊溶劑的表面張力大者爲宜 張力較糊爲小時，糊將變得無法穩定地〖 能夠適用於本發明之黏膠帶爲了對 種類或附著量，係能適當選擇使用。黏 與黏結劑層所構成，其中黏結劑層係由 充分之部分而不理 一部分則更佳。此 觸壓將開始，接著 之擴展將予以均勻 圓筒面的一部分時 爲真直度提高故較 較10mm爲小時， 因此變得無法將適 1 000mm爲大時， 觸壓不足的部分故 則更佳。若使圓筒 壓容易變得均勻而 置之偏差越小越好 〇 ，當抵接速度爲1 時，能夠最爲有效 糊連接之面的表面 。若黏膠帶的表面 轉印。 應於廣泛之塗布液 膠帶較佳爲由基材 溶劑吸收性之黏結 -21 - 200911390 劑所構成的黏膠帶。此乃當黏結劑能夠吸收糊或糊溶劑時 ’糊之流動性將降低（固化）’明顯變得容易剝離轉印故 較佳。爲此，黏著材之溶解度參數係以與糊或是與糊溶劑 之溶解度參數相近之値者較佳。該黏膠帶之溶劑吸收能力 宜爲每單位面積lm2有l〇mL以上’更佳爲20mL以上。若 每單位面積1 m2的溶劑吸收能力未滿1 〇 m L時，將有變得容 易產生溶劑吸收殘留之傾向。還有，黏膠帶之溶劑吸收能 力係透過浸漬於構成塗布液之溶劑中而在1分鐘依吸收所 增加的量所測出的値。 該黏膠帶之溶劑吸收速度適宜爲每單位面積lm2有 lmL/秒以上，更佳爲3 mL/秒以上。若每單位面積im2的溶 劑吸收速度未滿1 mL/秒時’糊溶劑吸收將過於費時，裝置 的導管將有變長之傾向。以外，黏膠帶之溶劑吸收速度係 藉由將膠帶浸漬於構成塗布液之溶劑中而5秒鐘所吸收溶 劑部分之重量增加部分除以每單位面積、每單位時間而測 出之値。 再者，該黏膠帶之黏結力係每20mm寬度適宜爲0.5〜 4.ON者爲宜，更佳爲2.0〜3.0N。若每20mm寬度之黏著力 低於0.5N時，將有變得無法將吸收殘留在噴出口面之糊中 的溶劑後所殘留的固化物完全去除之傾向；若超過4 . ON時 ，將有在膠帶之剝離上費時使黏結劑層從黏膠帶的基材剝 離之傾向。此外，該黏膠帶之黏著力係一種依照JIS Z 0237 (2 000 )之方法，與厚度25/zm之PET薄膜相貼合，於23 °C，以拉伸速度3 0 0 m m / m i η，於1 8 0 °方向抽剝而測出的値 -22- 200911390 。即使於溶劑吸收後也具有黏著力係重要的。 另外，該黏膠帶之黏結劑層的厚度適宜爲0.005〜 0.3mm’更佳爲〇.〇1〜0.15mm。若黏結劑層之厚度低於 0.0 0 5 m m時，將有無法完全吸收糊中溶劑之傾向；若超過 0.3mm時，將有膠帶之厚度變厚，捲取長度變短，交換變 得頻繁之傾向。 作爲本發明之黏膠帶，爲了在不損傷塗布頭之下進行 推壓，係以具有彈性且黏結劑面爲平滑者爲宜。如此之黏 膠帶宜具備由發泡黏結劑所構成的黏結劑層。所謂發泡黏 結劑係指於黏結劑層中具有氣泡（胞）或微細空孔之黏糸吉 劑，具有彈性者。例如，能使用於日本專利特開2000- 1 69803 號公報中所揭示者。 該黏結劑可以使用丙烯酸系樹脂或橡膠系樹脂等作爲 主要成分。該所謂的丙烯酸系樹脂係以丙烯酸酯作爲主要 單體成分之共聚物’更具體而言，使賦與黏著性之玻璃轉 移溫度低的主要單體中，與爲了賦與接著性、凝聚力之共 單體’進一步與含有用以改良交聯性、黏著性之官能基的 單體予以共聚合。 例如’主要單體可列舉：丙烯酸乙酯、丙烯酸丁酯、 丙烯酸-2-乙基己酯、丙烯酸異辛酯、丙烯酸異壬酯等。共 單體可列舉：醋酸乙烯、丙烯腈、丙烯醯胺、苯乙烯、甲 基丙烯酸甲酯、甲基丙烯酸酯等。含有官能基的單體可列 舉：甲基丙嫌酸、丙燦酸、衣康酸等之含有竣基的單體； 甲基丙烯酸羥乙酯、甲基丙烯酸羥丙酯等之含有羥基的單 -23- 200911390 體；甲基丙烯酸二甲胺基乙酯等之含有胺基的單體；丙烯 醯胺、羥甲基丙烯醯胺等之含有醯胺基的單體；甲基丙烯 酸縮水甘油酯等之含有環氧基的單體；馬來酸酐等之含有 酸酐基的單體等。 該橡膠系樹脂係以彈性體爲主要成分’可列舉：再將 黏著性賦與劑樹脂、軟化劑、抗老化劑、塡充劑等添加於 彈性體之中所得之物。該彈性體係一種玻璃轉移溫度爲低 的，達高溫時爲橡膠狀平坦區域廣的聚合物，例如，可列 舉：天然橡膠、異戊二烯橡膠、苯乙烯、丁二烯橡膠、苯 乙烯-丁二烯橡膠、苯乙烯-丁二烯塊狀共聚物、苯乙烯-異 戊二烯塊狀共聚物、丁基橡膠、聚異丁烯、聚乙烯異丁基 醚、氯丁二烯橡膠、丙烯腈橡膠、接枝橡膠等之合成橡膠 或熱可塑性彈性體，但是並不受此等例子所限定。 黏著性賦與劑樹脂、軟化劑、抗老化劑、塡充劑並未 予以特別限定，能夠使用習知慣用之物。例如，黏著性賦 與劑樹脂可列舉：松香系樹脂、萜烯系樹脂、石油樹脂（ 脂肪族系石油樹脂、芳香族系石油樹脂、氫化石油樹脂） 、香豆酮-茚樹脂、苯乙烯系樹脂等。其中’橡膠系樹脂尤 以苯乙烯-異戊二烯塊狀共聚物或天然橡膠系彈性體爲主 要成分之樹脂特別理想。 用於本發明之塗布頭清淨方法之裝置爲，黏膠帶爲由 輥狀所捲出之物，且該裝置宜具有：間歇性供應該黏膠帶 的捲出手段、將清淨後之黏膠帶捲取成輥狀之捲取手段、 控制該黏膠帶張力之手段、控制該黏膠帶傳送量之手段、 -24- 200911390 及檢測膠帶殘量之手段。 黏膠帶之張力並未予以特別之限定，較佳爲10〜 1 000N/m。若較l〇N/m爲小時，黏膠帶材之搬送變得不穩定 ，將產生皺褶，推壓容易變得不均勻。若較1 000N/m爲大 時，因爲用以施加局張力之驅動設備將大型化，或是裝置 負荷增大而容易變壞故不理想。若爲30〜200N/m則更佳。 設置習知之各種皺褶拉伸手段，或設置防止帶電之手 段亦較佳。尤其，若帶電量爲lOOOkV以下時，因爲變得容 易防止放電，也變得容易防止塵埃之吸附故較理想。若爲 100kV以下的話則更佳。 另外，於發生塗布不良之情形等，有時會有因糊噴出 之紊亂使糊大量附著於噴出口面。在此種情形，有必要以 黏膠帶複數次重複清淨而需要長時間，且在以黏膠帶推壓 之際，恐有糊大幅擴散而超乎預期地污染塗布頭之虞。對 於如此大量的糊附著，預先具備由習用技術之單絲纖度 0.0 1德士（ t e X )以下之超極細纖維編織物所製造之噴出口 面的拭除清淨機構，在生產效率上係較佳。 藉由使用單絲纖度0.0 1德士以下之超極細纖維編織物 ，即使於糊中含有約數M m之微細無機粉末之情形下’也 能夠無拭除殘留地加以清淨。此情形下’進一步將洗淨溶 液噴向編織物，可容易去除糊而較佳。 如此一來，即使是組合習用技術之情形，與僅利用編 織物之拭除所進行之塗布頭清淨方法相較時’由於能夠大 幅減低拭除時之摩擦量，故能夠大幅抑制塗布頭之損傷。 -25- 200911390 本發明特別適用於糊黏度爲10〜100Pa. s之情形。右 較1 0 P a · S爲小時，即使於未塗布時’也會有因糊變得谷 易從塗布頭滴下之傾向而根據附著量變得容易發生轉印殘 留故不理想。另外，若較l〇〇Pa. s爲大時，除了會有噴出 壓變得過高，難以提高塗布速度的傾向之外’根據附著量 而變得容易發生轉印殘留故不理想。更佳爲20〜7 OPa ♦ s 。此外，糊黏度係使用Brookfield型黏度計’於測定溫度 2 5 °C、摩擦速度2.4s- 1下所測出之値。 另外，塗布液係電漿顯示器製造所用之螢光體糊 '反 射層用糊、介電體糊、電極糊等，只要配合塗布材料加以 選定即可。列舉一例，所謂螢光體糊係含有螢光體粉末' 黏結劑、添加劑、溶劑等之物。 本發明若與習知之帶電塗布組合時，更爲有效。所謂 帶電塗布係將電荷賦與塗布頭或糊或基板中任一種，使用 靜電力而使糊靠近基板的塗布方法。於帶電塗布中，因爲 塗布結束後，糊朝向噴嘴噴出口面的附著將有變少之傾向 ’故與本發明組合時，糊之轉印時間能縮短，生產效率上 非常理想。 右本發明之塗布頭爲電獎顯7K器製造用營光體塗布噴 嘴時’能更好好地予以清淨。即使於習用技術中之噴出口 面受到污染或拭除刮傷發生而無法均句塗布之情形下，若 將本發明之塗布頭清淨方法適用於進行每一面塗布之開始 及結束的片狀方式之塗布時’因爲噴出口面無刮傷，也能 夠無殘留糊地加以清淨，所以能夠得到非常均勻且高品質 -26 - 200911390 之塗布面故較理想。尤其若用於電漿顯示器製造用螢光體 糊之塗布時’因爲效果大故較佳。 【實施例】 以下，說明將本發明應用於電漿顯示器製造用螢光體 塗布頭清淨的實施例，但是本發明並未受此實施例所限定 0 使用之螢光體糊係利用以下之方法而作成。將無機螢 光體粉未之重量比率設爲19而分散與混合於重量比率20 之乙基溶纖素的1 6重量％萜品醇/苄醇（3/1 )溶液中，以 作成螢光體糊。使用的螢光體粉末：於紅色發光中爲（Y，Gd )BCh: Eu;於綠色發光中爲ZnSiCU: Μη;於藍色發光中 爲BaMgAhoOu: Eu。此等各色螢光體粉末的累積平均粒徑 及最大粒徑係R螢光體：2.7/z m、27/z m; B螢光體：3.7// m 、27/zm; G螢光體：3.6/zm、25#!!!。另外，各自之黏度 係R螢光體：52Pa· s;B螢光體：39Pa· s;G螢光體：40Pa· s ο 塗布該螢光體之塗布頭係利用了藉由在塗布頭之長邊 方向配列有1 920個孔徑1 00 # m的噴出口之塗布頭，且利 用空氣對內部施加200〜700kPa之壓力，使相對於基板之 進行速度於20〜200mm/s之範圍內變化而使螢光體糊噴出 ，而將螢光體糊塡充於既定之隔壁間。 使用於附著在該塗布糊之噴出口與噴出口面的螢光體 糊之清淨的黏膠帶係如下所示： 黏膠帶：日本日東電工股份公司製之ELE-CLEANER ( -27- 200911390 註冊商標）。 另外，纖維編織物係如下所示： 超極細纖維編織物：TORAY股份公司 (註冊商標）。 濕潤編織物之洗淨溶劑係使用丙酮。 評估係如下方式進行的：如第6 ( c ) 糊澆在噴出孔之邊緣時，將有正常之塗布 。因此，觀察一連串清淨動作後之噴出孔 糊之部分澆在其邊緣之形式所附著的噴出 噴出口之比例，將1 0%以上標示爲X，將 〇，將1 %以下標示爲◎。 實施例1 將如上所述製得的螢光體糊塡充於該 該塗布頭以將螢光體糊塗布於既定之隔壁 將黏膠帶作成輥狀之物，利用第1圖所示 出口與噴出口面附著有螢光體糊之塗布頭 塗布頭噴出口面之方式所設置的橡膠輥（ΐ Α硬度30度、橡膠厚度10mm )作爲推壓 第1次之推壓動作。使黏膠帶之黏結劑層 噴出口及噴出口面，利用壓力0.2MPa將黏 頭的同時，保持4秒鐘之後，以5 0 m m / s使 噴出口面之方向移動，同時將lkg/m之張 以從噴出口面剝離黏著面。於噴出口之約 薄的糊薄膜。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating head cleaning method in which an adhesive tape is pressed against the coating head to remove a coating liquid or a coating paste attached to the vicinity of the coating head discharge port. [Prior Art] In recent years, the development of 'DC type and AC type plasma displays has been upgraded, and it has already been listed,' and it is gradually forming a large market. In the plasma display, structures having various functions such as pixel isolation have been formed. For example, the AC type plasma display is 'in the discharge space provided between the front substrate and the rear substrate' to generate a plasma discharge between the opposing anode and cathode electrodes, by Xe enclosed from the discharge space. Ultraviolet light having a very short wavelength of 172 nm generated by a discharge gas such as a -Ne mixed gas is irradiated onto a phosphor provided in the discharge space to be displayed. The structure is called a partition wall (also referred to as a barrier rib) because it suppresses the expansion of discharge in a certain area, displays it in a predetermined element, and provides a uniform discharge space. In general, the shape of the partition wall may be a strip-like or lattice-like object having a width of about 20 to 120 #m and a height of 50 to 250/zm. Further, the phosphor system is formed by forming a phosphor paste containing a phosphor powder, an organic binder and an organic solvent as a main component, and coating it between predetermined partition walls, and if necessary, drying and baking to form a phosphor layer. A method of applying a phosphor paste to a predetermined partition wall is exemplified by a screen printing method and a disperser method (also referred to as a nozzle method). A disperser method having a small material loss has been attracting attention. 200911390 A schematic diagram of a phosphor paste coating method by a disperser method is shown in Fig. 3. The disperser method refers to a space (pool) in which the inside of the coating head 1 has the phosphor paste 2 stored, and the substrate 3 is relatively moved while being pressurized by being connected to the space thereof. The pipe 4 is introduced by introducing pressure-controlled compressed air and ejecting the phosphor paste 2 from the discharge port 5 into the partition wall to perform coating. Since the intermittent application of each of the substrates is carried out, it is important to repeat the ejection of the paste from the coating head and to perform the stabilization stably at the start of each application. The coating of the phosphor paste by the disperser method is applied in a sheet form, and after the application on one substrate, the discharge of the phosphor paste 2 from the ejection port 5 is stopped, and at this time, the residual paste is easily attached. A discharge port surface 6 (including a surface of the coating head discharge port) in the vicinity of the discharge port 5. If the residual paste or foreign matter adheres to the discharge port surface 6 in the vicinity of the discharge port 5 before the next coating, or when the discharge port surface 6 near the discharge port 5 is damaged by scratches or depressions, when it is recoated, There is a problem that the amount of discharge is varied, or the discharge behavior of the paste is disordered, and the coating tends to be unstable. As a result, since the coating quality is greatly impaired, defective products will occur in a large amount. Therefore, it is important that the discharge port surface 6 including the discharge port 5 is sufficiently cleaned before coating. That is, the cleaning of the coating head before coating is indispensable. In the method of cleaning the coating head, it is known that the wiping member is pressed against the discharge port surface and rubbed to wipe off residual paste or foreign matter (see Patent Document 1). As shown in Fig. 4, the wiping member 9 made of the woven fabric is pressed against the nozzle opening surface 6 of 200911390 by pressing the member 1 ,, and rubbing in a certain direction 11 by rubbing The method of removing the residual paste 8 adhering to the discharge port 5 and the discharge port surface 6 is also removed. In particular, for the purpose of improving the wiping effect, for example, a wiping method in which a knitted fabric of ultrafine microfibers is wetted by a cleaning solvent such as acetone is known. However, this method has the problem of high cost of the so-called high-fine microfiber weaving fabric, and also causes the firefly contained in the phosphor paste to be wiped off by the wiping member. The inorganic powder such as the optical powder is rubbed in contact with the discharge port surface, and the problem of scratching 12 as shown in Fig. 5 is generated on the surface of the coating head. When such a scratch occurs in the coating head, the discharge behavior of the coating liquid tends to be unstable at the coating start time because the coating quality is greatly impaired and it has to be exchanged with the scratch-free coating head. Further, in general, in the coating head 1 of the disperser method, about 1,000 to 4,000, and a high-precision fine ejection opening 5 having a diameter of 50 to 200 Ai m is processed, because it is very expensive, so the occurrence of scratching occurs. The resulting exchange of such coating heads will significantly increase the manufacturing cost of the plasma display panel. On the other hand, it is known that a method of wiping off the woven fabric is used, and a method of cleaning the phosphor paste adhering to the discharge port surface in the vicinity of the discharge port by a doctor blade is used (see Patent Document 2). However, due to the scraping by the doctor blade, the adjustment is complicated, and the dust caused by the abrasion of the blade is likely to be a problem. In addition, since there is a scraper or an inorganic powder such as a phosphor powder contained in the phosphor paste scraped off by the doctor blade, scratches occur on the discharge port surface near the discharge port of the coating head, which is still not preferable. 200911390 In addition, in order to solve the problem of the damage of the discharge port caused by the scraping, it is known that the coating liquid of the low viscosity and low concentration for spraying is sprayed on the discharge port surface of the ink jet nozzle by a small amount, and the lubrication of the coating liquid is utilized. A technique for preventing abrasion of the blade and scratching of the discharge port surface (see Patent Document 3). However, in the case of a high-viscosity paste containing solid fine particles in a high concentration manner as in the case of a phosphor paste, the lubricating effect of the coating liquid is insufficient, and the abrasion of the blade and the scratch on the discharge port surface are deteriorated. On the other hand, it is known that a conventional technique (refer to Patent Document 4) is for preventing the scratch on the discharge port surface due to such friction, and using a pressing member such as rubber to vertically press the porous member. The clean material composed of the adsorbent material is pressed against the discharge port surface of the spray nozzle, and then peeled off. However, in the case of a high-viscosity paste containing solid particles in a high concentration as in the case of a phosphor paste, only the porous adsorbent is pushed, and sufficient absorption and transfer are not caused, and a poor cleaning phenomenon occurs. Furthermore, a conventional technique (refer to Patent Document 5) is known in which a pressure-sensitive adhesive tape having a solvent absorption property is brought into contact with a coating head discharge surface to which a phosphor paste is attached, and a solvent component derived from a residual paste is absorbed. The residual paste is solidified, and the cured paste is transferred from the surface of the material to be cleaned by peeling. In addition, the coating head cleaning device similar to the device disclosed in Patent Document 4 is applied by the same coating device as that disclosed in Patent Document 1, and the phosphor paste cannot be completely removed. The coating quality is obviously impaired. Even if the pressing time of the adhesive tape is extended, or the number of pressing times is repeated several times, not only the removal failure can be completely solved, but the reverse also occurs in 200911390. As a result of analyzing the phenomenon in detail, the following facts are obtained: Fig. 6 is a view showing a state in which the residual paste is adhered in the vicinity of the discharge port in the cleaning method in which only one pressing operation is performed. First, using a coating head cleaning device of the conventional type similar to the device disclosed in Patent Document 1, as shown in Fig. 6(a), the vicinity of the discharge port is cleaned, and then the substrate is formed on the substrate on which the partition wall is formed. Fluorescent paste. After observing the coating head discharge surface 6 after the application, as shown in Fig. 6(b), the residual pastes 8a to 8c are adhered to form a coating liquid in which the shape and the amount are irregularly displaced. After several times of application, the residual state of the residual paste is different each time. Then, the nozzle discharge surface 6 of the coating liquid to which the above-described irregularity is attached is pressed by the flat rubber which is the same as the apparatus disclosed in Patent Document 4, and the adhesive tape is pressed against the discharge port surface to carry out the transfer. After that, after observing the cleaned nozzle discharge surface, it is confirmed that the following conditions are displayed as shown in Fig. 6(c): In the portion where a small amount of residual paste 8a is attached, during the pressing of the adhesive tape, the solvent is adhered to the adhesive tape. After being absorbed, the paste which has been solidified is adhered thinly and firmly to the discharge surface ' near the discharge port', and the adhered state 1 3 a remains. On the other hand, in the portion where a large amount of the residual paste 8b adheres, the curing by the solvent absorption during the pressing of the adhesive tape may not be sufficient, and the thin liquid paste remains and the adhered substance remains in the wet state. That is, 'two kinds of transfer failures in which the occurrence state is different are found. In the portion where the intermediate amount of the residual paste 8c adhered, the transfer failure did not occur, and the transfer portion 1 3c was formed. In order to further remove the adhered material in the wet state, if the adhesive is applied to the adhesive tape of the 200911390 tape again, it is possible to remove the portion of the adhered material in the wet state and adhere to the nozzle discharge port surface 'after'. . Therefore, the result of the relationship between the residual paste amount and the push holding time for which it is removed is '1'. In other words, in the case where the amount of residual paste is small, it is suitable for a case where the amount of residual paste is large, and it is suitable for a long push-fit portion to which a small amount of residual paste adheres, and a portion where a small amount of residual paste is adhered = _ The portion where the residual paste adheres, and the time when the adhesive in the wet state causes the transfer failure on the portion of the residual paste to deteriorate is the time until the adhesive tape is attached to the discharge port and attached to the peeling. Then, if a large amount of residual matter adheres to the portion, the portion where a large amount of residual paste adheres is reversed. In a portion where a moderate amount of residual paste adheres, the transfer failure of the adhered portion of the adhesive in the adhered state is deteriorated. As a result of inventors' discussion of the above two conditions for clearing the conditions, it is impossible to remove all of the following cases. Therefore, the adhesion of the result is further explored, but once it is cured, the cured paste will be even stronger. Even if you try to use adhesive tape, the amount of residual paste, it is best known that the two have positive correlation and short push. Hold time; pressure hold time. Therefore, if the holding time is short, the printing defects are improved, and on the contrary, a large amount of residual paste remains, especially in a large amount. In addition, after pressing the nozzle surface that is held close to the surface, the transfer defect when the portion of the straight paste is lengthened and pressed is improved, and the portion of the phase or a small amount of residual paste remains, especially in the case of a small amount of residue transfer failure. OBJECTIVE: The invention is based on a cleansing condition or a residual paste that has been attached to the irregularity. The technology is finally achieved. -10-200911390 Patent Document 1: Japanese Patent Laid-Open Publication No. 2002-126599 Patent Document 2: Japanese Patent Laid-Open Patent Document No. 2004-0 1 4393 Patent Document 3: Japanese Patent Laid-Open No. Hei. No. 2006-247 95 No. Patent Publication No. JP-A-2006-247 No. JP-A No. 2004-3 3 0027 Patent Document 5: Japanese Patent Laid-Open No. 2001-35 SUMMARY OF THE INVENTION PROBLEM TO BE SOLVED BY THE INVENTION The object of the present invention is to provide a cleaning method for a coating head, a paste coating method using the same, and a method for producing a plasma display, wherein the coating head is cleaned By using an adhesive tape, the coating liquid adhering to the coating head discharge port and the discharge port surface can be removed efficiently without damaging the coating head. The technical means for solving the above problems is a cleaning method of a coating head, which is a coating liquid which is cleaned and adhered to a discharge port surface near the discharge port of the coating head, and is characterized in that the adhesive tape is approximated After abutting in the direction of the discharge port in the vicinity of the discharge port, the pressing operation for one or more extractions is performed in the approximately vertical direction, and then the micro-discharging operation of the coating liquid is slightly discharged from the discharge port, and further The adhesive tape is nearly perpendicular to the direction of the discharge port surface in the vicinity of the discharge port, and after the contact, the pressing action for the extraction is performed more than once in the approximate vertical direction. According to the present invention, even if the nozzle discharge surface of the coating liquid which is irregularly deviated and which cannot be removed by the conventional cleaning technique is attached, it is possible to transfer the nozzle surface using the adhesive tape or to repeat the operation. -11 - 200911390 The completely removed residual coating solution is removed, except that it can be cleanly cleaned, and it will not be scratched because it is not rubbed. According to the present invention, the pressing operation for extracting one or more times before the micro-discharging operation is performed, and a thin deposit in a wet state remains in a portion where a large amount of residual coating liquid adheres; a moderate amount of residue remains. The portion to which the coating liquid adheres is cleaned off; and a portion where a small amount of the residual coating liquid adheres remains a thin adhering substance in an adhered state. Then, according to the next-time micro-discharge operation, a coating liquid having a uniform size and a small amount is formed. Thereafter, by performing one or more pressing operations, the accumulated coating liquid formed by the micro-discharging operation is removed. At this time, the adhering substance in a thin wet state remaining by the pressing operation before the micro-discharging operation is removed by the pressing operation after passing through the accumulated coating liquid. Further, since the portion firmly adhered by the pressing operation before the micro-discharging operation is also connected to the accumulated coating liquid, it is in a wet state, and therefore is removed by the pressing operation performed thereafter. In the case where the action can be removed by the action of the micro-discharge operation, the coating liquid is reattached, but the pressing operation after the use is removed. According to the present invention, the residual paste can be cleanly removed from the vicinity of the discharge port even if the nozzle discharge surface of the coating liquid remains in the size of the irregular deviation which cannot be removed by the conventional adhesive transfer technique. Further, the technical means for solving the above-described problems is a coating head cleaning method which presses the elastic body so that the adhesive tape is interposed between the pressing head and the coating head discharge surface. The pressing member is constructed. Further, a coating head cleaning method as disclosed above, wherein the coating liquid is a phosphor paste. Further, a coating head cleaning method for a phosphor coating nozzle for manufacturing a plasma display. Further, a method of applying a paste is characterized in that after the coating head is cleaned by the coating head cleaning method, the coating liquid is discharged from the coating head to be applied. Further, a method of manufacturing an electric display is characterized in that the paste coating method is employed to form a phosphor layer. [Effect of the Invention] When the coating head cleaning method of the present invention is used, not only the simple method but also the residual coating liquid can be reliably removed from the coating head discharge surface, it is possible to provide a low-cost and simple coating head cleaning method. Further, since the discharge port surface of the coating head is not rubbed by the cleaning material, the discharge port surface of the coating head is not damaged, and the life expectancy of the so-called expensive coating head is remarkably prolonged. [Embodiment] The present invention relates to a coating head cleaning method which has the following steps: pressing the adhesive tape against a coating head, and then removing the adhesion by pulling away from the coating head The coating liquid on the discharge port surface near the discharge port of the coating head. In the present invention, the coating head refers to a member constituting a coating nozzle or a head of a coating device, and has a member for ejecting a discharge port of the coating liquid. In addition, the discharge port means an opening which is supplied from the coating liquid supplied to the coating head to the object to be coated from -13 to 200911390. Further, the discharge port surface means a surface including a peripheral portion of the discharge port in the outer surface of the coating head, that is, a surface on which the discharge port is to be opened. In addition, when the vicinity of the discharge port is in the vicinity of the periphery of the discharge port, the coating quality is remarkably impaired when the coating liquid is applied in this region. The discharge port may be singular or plural, or may be any shape such as a slit shape, a circular shape, an elliptical shape or a polygonal shape, and the coating head is a coating head of a phosphor for a plasma display device to be described later, A method in which the respective colors are ejected at least once, and can be applied to a phosphor layer necessary for one screen of the plasma display, and preferably a number of pixels (about 1,000 to 4,000) in accordance with the number of pixels in the scanning direction. The circular discharge port (having a diameter of about 50 to 2 0 0 /zm) is provided in the coating head provided in the longitudinal direction of the coating head. In the present invention, the pressing operation means that the adhesive tape is abutted in a direction approximately perpendicular to the ejection orifice surface for a certain period of time, and is cured by allowing the adhesive of the adhesive tape to absorb the solvent in the coating liquid. The coating liquid is pulled away from the vertical direction, and the cured coating liquid is transferred from the discharge port surface to the adhesive tape and removed. By abutting in the approximately vertical direction with respect to the discharge port surface, it is held without friction, and is pulled away from the approximately vertical direction, and the coating head can be efficiently removed without adhering the coating head. In the coating head cleaning method of the invention, it is preferable to use a phosphor coating nozzle for plasma display manufacturing as a coating head, and to use a phosphor paste as a coating liquid. Hereinafter, an example of a coating head cleaning method in the case where a phosphor paste is applied by using a phosphor-coated nozzle for plasma display manufacturing will be described, but the present invention is not limited by this example. Fig. 1 is a schematic view showing an embodiment of the coating head cleaning method of the present invention. Fig. 1(a) is a view schematically showing the action of pressing the adhesive tape 14 against the residual paste 8 adhering to the discharge port face 6 of the coating head 1 by using the pressing member 10. Fig. 1(b) shows a section perpendicular to the longitudinal direction of the l(a) diagram, and the wrinkle flattening guide 15 prevents wrinkles from occurring in the adhesive tape before the member 10 is pushed. Relaxed look. The first (c) and (d) diagrams show the state in which the adhesive tape 14 is peeled off from the discharge port surface 6 after a certain period of time has elapsed from the contact state of the first (a) and (b) drawings. 8 Transfer to the adhesive tape 1 4 look. The pressing conditions controlled in the pressing operation include the pressing pressure, the pushing amount, the pressing holding time, and the pressing member elastic modulus, and the most important is the pressing holding time. As described above, the experimental results show that the residual paste amount has a positive correlation with the pressing holding time, and in the case where the residual paste amount is small, it is suitable for a short pressing holding time; in the case where the residual paste amount is large, it is suitable for long pushing. Pressure hold time. In the coating head cleaning method of the present invention, after the substrate is applied, the paste remaining in the vicinity of the coating head discharge port in order to clean the irregular disorder is first, as shown in Fig. 1, the adhesive tape is abutted to be approximately perpendicular to the spray. After the coating liquid is slightly solidified in the direction of the outlet surface, the first pressing operation is performed in the vertical direction. The pressing conditions used in the first pressing operation can be appropriately set in accordance with the condition of the residual paste. According to the first pressing operation, 'a thin deposit that remains in a wet state in a portion where a large amount of residual paste adheres' is a portion where a moderate amount of residual paste adheres, and is cleanly wiped off; there is a small amount of -15-200911390 The portion to which the residual paste adheres remains a thin adherent in an adhesive state. The pressing operation performed before the micro-discharging operation as described below is preferably once, and may be performed twice or more if necessary. Fig. 2 is a view showing the state of attachment of the residual paste in the vicinity of the discharge port in the cleaning method of the present invention. The second (a) diagram shows a pattern in which the residual paste adhered to the discharge port surface before the micro-discharging operation. According to the pressing operation of one or more times before the micro-discharging operation, the transfer-good portion 1 3 c in which the residual paste is removed is removed, the portion of the adherent 1 3 a in the adhered state remains, and the residue remains. A portion of the adherent 1 3 b in a wet state. Next, a micro-discharge operation of the micro-discharge coating liquid is performed from the discharge port. Fig. 2(b) is a graph showing the state in which the residual paste adheres to the discharge port surface after the micro-discharge operation. The accumulated coating liquid 17 having a small size and a uniform control according to the micro-discharging operation is formed on the peripheral portion of the discharge port 5 of the discharge port surface 6. In the original coating head, it is generally possible to provide a high-precision and uniform function of ejecting the paste, and it is not necessary to provide a special apparatus for the micro-discharge operation, and the setting of the micro-discharge operation can be set. The setting conditions of the micro-spraying can be appropriately set in accordance with the paste viscosity and the flow resistance of the discharge port. For example, 'suitable to use the discharge pressure 300~lOOkPa, pressurization time 0. 01~Is and so on. The micro-spraying is preferably carried out so as to cover the ejection opening, but is not limited by the condition, and at least when the pressing is performed, the paste covers the ejection opening. Then, the adhering material 1 3b # which is in a thin wet state remaining before the micro-discharging operation is removed from the accumulated coating liquid 17 based on the pressing operation performed after the micro-discharging operation. In the case of the micro-discharging operation, the adhered material 13 3 a remaining in the adhesive state is wetted by contact with the accumulated coating liquid, so that it is easy to be used for the pressing operation after the micro-discharging operation. Remove it. In the transfer-good portion 丨3 c which can be cleanly removed by the pressing operation performed before the micro-discharging operation, the coating liquid 1 7 is newly formed, but the coating liquid 7 formed by the micro-discharging operation is blended. Since the amount of residual paste is set to the pressing holding time of the pressing operation performed after the micro-discharging operation, it is surely removed. As a result, the residual paste can be cleanly removed from the vicinity of the discharge port even if the nozzle discharge surface of the residual paste is adhered to the irregular deviation which cannot be removed by the conventional adhesive transfer technique. Further, the pressing operation performed after the micro-discharging operation is preferably performed once, and may be performed twice or more if necessary. However, among the adhering substances in the adhesive state, the pressing operation after the micro-discharging operation is removed, and only the vicinity of the ejection port which is in a wet state by the accumulated coating liquid formed by the micro-discharging operation is used. A part of the adhering state in the adhered state leaving the discharge port may remain in the residual state. However, even in this case, since the size of the accumulated coating liquid 17 can be appropriately adjusted so as not to affect the coating to sufficiently clean the vicinity of the discharge port, there is no problem. The size of the coating liquid to be deposited is preferably set in accordance with the distance between the discharge port diameter of the coating head and the discharge port, that is, the distance between the discharge ports. For example, a suitable discharge port diameter of 50 to 200/ with respect to the PDP phosphor coating nozzle. /m, the discharge port spacing is 1〇〇~l〇〇〇/zm, and the size of the deposited coating liquid 17-17-200911390 is preferably 10 vm from the outer edge of the discharge port. If it is smaller than 1 Ο #m, the deviation of the discharge amount will occur when the discharge is near the discharge port, or the shape of the paste may easily make the coating unstable. It becomes difficult to use it evenly after the micro-spraying action. The size of the coating liquid 17 is more than 50/zm or more and 50 〇em or less. Further, the deviation of the size of the accumulated coating liquid is preferably Ιμηη or more and 100 μm or less. In order to obtain 3, it is necessary to use a very complicated and expensive discharge amount control difference to be larger than 1 0 0 // m, and it becomes difficult to remove the uniform sentence by a small amount of pressing action. Hereinafter, the requirements for influencing the pressing operation will be described, and the pressing conditions may be set and the number of pressing times may be appropriately set. The push hold time is preferably 0. 1 to 10 seconds Since the paste is not sufficiently cured, it becomes easy to occur. When the temperature is long, the paste is excessively cured, so the printing is poor. More preferably 0. 5 to 5 seconds. In order to make the above-mentioned pressing force more positive, it is preferable to abut the adhesive tape in a direction perpendicular to the coating head discharge surface, and it is more preferable if the material is abutted against the surface. In the case of using a pressing member, for example, the above is not sufficient for cleaning below 1000#m, and when the recovery is easy to disorder and the ejection is more than 1 000 // m, the pressing operation is performed at a good distance. The smaller the outer edge of the mouth is, the better the deviation is better than the deviation of 1 / 4 m is not ideal. The setting of the pressing conditions after the partial discharge operation is not limited by these settings. If it is 0. 1 second is short time. If the adhesive rotation is more likely to occur, it is preferable to press the pressing member from the adhesive tape back type to the pressing structure as shown in Fig. 1, by means of the adhesive tape 1 by -18-200911390 4, the adhesive layer of the adhesive tape is pressed against the ejection face 6 of the adhesive tape 1 to move toward the approximately vertical direction of the ejection orifice surface 6 to push the member 10 to push The residual paste 8 on the discharge port surface 6 in the vicinity of the discharge port 5 is adhered to the adhesive layer, and then the residual paste 8 adhering to the discharge port surface 6 can be removed by withdrawing the adhesive tape 14' from the discharge port surface 6. When the adhesive tape 14 is pulled away from the ejection orifice surface 6, the pressing member 1 is pulled away from the ejection orifice surface 6 in a direction slightly away from the ejection direction. If the adhesive tape 14 is given a slightly higher tension and is quickly pulled away, the effect is large. The preferred pressing pressure (contact pressure) is 0. 01~IMPa. If the contact pressure is 0. 0 1 Μ If P a is small, the uniform transfer of the paste will become insufficient. Further, 'if it is larger than 1 MPa', it is not preferable because a large load is applied to the contact pressure mechanism, and it is not preferable because the coating head is easily damaged. More preferably 0. 05~0. 3 MPa. For the measurement of the contact pressure, for example, a pressure sensitive sheet (trade name: Pres cal) manufactured by Fuji Photo Film Co., Ltd., or the like can be used. Or, by setting the contact pressure sensor combination in the pressing member and returning the contact pressure measurement result to the controller of the contact pressure action, a uniform contact pressure can be obtained. Such a contact pressure is particularly suitable for the case where the pushing amount of the coating head to the elastic pressing member becomes 0 to 5 m m. If the push amount is less than 0, the contact pressure does not occur. If it is larger than 5 mm, it is not preferable because the coating head is liable to be damaged. The elastomer constituting the pressing member can be made of various materials, but is preferably rubber. Although various rubbers can be used, it is preferable that they are not damaged by residual deformation or the like even if they are repeatedly abutted. An example of such a rubber, -19-200911390, for example, 矽 rubber or natural rubber. Moreover, it is preferable that it is a rubber material which does not deteriorate easily even if a paste adheres. In the case where an appropriate combination of a paste and a rubber material cannot be selected, a cover tilm or the like may be provided on the rubber surface. The hardness of the rubber is preferably A20 to A60 degrees (JIS K 6253 (2006)). If the temperature is less than A 20 degrees, the contact pressure tends to be insufficient, and the wet transfer failure is likely to occur. Further, when the degree of A 2 0 is large, not only the elasticity is impaired, but also a uniform contact pressure is not obtained, which is undesirable in the coating head. More preferably A30~A40 degrees. When the rubber hardness deviation of the pressing member abutting surface is large, since a uniform contact pressure cannot be obtained, the hardness variation is preferably as small as possible, and is preferably 20 degrees or less. If it is 10 degrees or less, it is more desirable. In the case where the discharge holes are formed in a row in the coating head, when the straightness of the abutting surface of the pressing member is 1 mm or less, it is preferable because a uniform contact pressure is easily obtained. If it is 0. When it is below 5 m m, it is still suitable. In addition, if the surface roughness of the abutting surface of the pressing member is 0. When it is 5 mm or less, it is preferable because a uniform contact pressure is easily obtained. If it is 0. When it is 1mm or less, it is still suitable. Further, the rubber thickness is suitably from 1 to 30 mm, more preferably from 5 to 15 mm. When the thickness is smaller than 1 mm, the elasticity will be damaged and a moderate contact pressure cannot be obtained. In the case where the size is larger than 30 mm, the device becomes large and uneconomical except for an unnecessary amount of material. When the cross-sectional shape of the abutting surface of the pressing member is convex, it is preferable because the contact pressure of the important discharge port portion can be surely achieved. If it is -20-200911390 flat or concave, it becomes easy to cause contact pressure. In particular, when the shape of the abutting surface is a cylindrical surface, it is preferable to be in the vicinity of the discharge ports arranged in a row, because it is enlarged toward the periphery of the discharge port. Further, when the shape of the abutting surface is such that the abutment surface is easily processed, it is preferable. The diameter of the cylindrical surface is preferably from 1 〇 to 1000 mm. If the discharge port position is easily deviated from the apex of the cylinder, the cutting pressure is applied to the discharge port, which is not preferable. If the effect of the convex shape is weakened, it becomes easy to occur. If the apex of the cylindrical surface having a diameter of 20 to 100 mm overlaps with the discharge port position, the contact is still suitable. The apex of the cylinder and the discharge port position are preferably 5 mm or less, more preferably 2 mm or less. The transfer speed of the pressing operation of the present invention is ～100 mm/s, and the peeling strength is 10 to 1000 mm/s. The adhesive tape which can be applied to the present invention is preferably such that the tension is higher than the surface tension of the paste or the solvent, and the paste becomes less stable. The paste becomes unstable. The adhesive tape which can be applied to the present invention is for the type or The amount of adhesion can be appropriately selected and used. It is composed of a layer of a binder and a binder, wherein the layer of the binder is better than a part of the binder. This contact pressure will start, and then the expansion will increase the true straightness of a part of the uniform cylindrical surface, so it is less than 10 mm, so it becomes impossible to make the suitable 1 000 mm large, and the part with insufficient pressure is better. . If the cylinder pressure is easily made uniform, the smaller the deviation, the better. When the contact speed is 1, the surface of the surface to be joined can be most effectively bonded. If the surface of the adhesive tape is transferred. A wide range of coating liquid tapes are preferably adhesive tapes composed of a substrate solvent-absorbent adhesive -21 - 200911390. This is preferable when the binder is capable of absorbing a paste or a paste solvent, and the flowability of the paste is lowered (cured). For this reason, the solubility parameter of the adhesive is preferably similar to the solubility parameter of the paste or the paste solvent. The solvent absorption capacity of the adhesive tape is preferably l〇mL or more per unit area lm2, more preferably 20 mL or more. If the solvent absorption capacity per unit area of 1 m2 is less than 1 〇 m L , there is a tendency to cause solvent absorption residue. Further, the solvent absorption capacity of the adhesive tape is a enthalpy measured by immersion in a solvent constituting the coating liquid in an amount which is increased by absorption for 1 minute. The solvent absorption speed of the adhesive tape is suitably 1 mL/sec or more per unit area lm2, more preferably 3 mL/sec or more. If the solvent absorption rate per unit area of im2 is less than 1 mL/sec, the paste solvent absorption will be too time consuming, and the catheter of the device will tend to become longer. In addition, the solvent absorption speed of the adhesive tape was measured by dividing the weight-increasing portion of the absorbed solvent portion for 5 seconds by immersing the tape in the solvent constituting the coating liquid by the area per unit area and per unit time. Furthermore, the adhesive force of the adhesive tape is suitably 0 per 20 mm width. 5~ 4. The ON is better, and the better is 2. 0~3. 0N. If the adhesion per 20mm width is less than 0. At 5 N, there is a tendency that the cured product remaining after the solvent remaining in the paste on the discharge port surface cannot be completely removed; if it exceeds 4 . At the time of ON, there is a tendency for the adhesive layer to be peeled off from the substrate of the adhesive tape in a time-consuming manner of peeling off the tape. In addition, the adhesive force of the adhesive tape is a method of conforming to a PET film having a thickness of 25/zm in accordance with JIS Z 0237 (2 000), and a tensile speed of 300 mm / mi η at 23 ° C.値-22- 200911390 measured by stripping in the direction of 180 °. It is important to have adhesion even after solvent absorption. In addition, the thickness of the adhesive layer of the adhesive tape is suitably 0. 005~ 0. 3mm’ is better. 〇1~0. 15mm. If the thickness of the adhesive layer is less than 0. At 0 0 5 m m, there will be a tendency to not completely absorb the solvent in the paste; if it exceeds 0. At 3 mm, the thickness of the tape is increased, the winding length is shortened, and the exchange tends to become frequent. The adhesive tape of the present invention is preferably one which has elasticity and a smooth surface of the adhesive in order to press it without damaging the coating head. Such a tape should preferably have a layer of a binder composed of a foaming binder. The term "foaming binder" refers to a viscous agent having bubbles (cells) or fine pores in a layer of a binder, and has elasticity. For example, it can be used as disclosed in Japanese Laid-Open Patent Publication No. 2000-169803. As the binder, an acrylic resin, a rubber-based resin or the like can be used as a main component. The so-called acrylic resin is a copolymer containing acrylate as a main monomer component. More specifically, in the main monomer having a low glass transition temperature to which adhesiveness is imparted, in order to impart adhesion and cohesion The monomer 'is further copolymerized with a monomer having a functional group for improving crosslinkability and adhesion. For example, the main monomer may, for example, be ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, isooctyl acrylate or isodecyl acrylate. The co-monomer may, for example, be vinyl acetate, acrylonitrile, acrylamide, styrene, methyl methacrylate or methacrylate. Examples of the monomer having a functional group include a mercapto group-containing monomer such as methyl acrylic acid, acrylic acid or itaconic acid; and a hydroxyl group-containing hydroxyethyl methacrylate or hydroxypropyl methacrylate; -23- 200911390; an amine group-containing monomer such as dimethylaminoethyl methacrylate; a guanamine group-containing monomer such as acrylamide or hydroxymethyl acrylamide; glycidyl methacrylate An epoxy group-containing monomer, an acid anhydride group-containing monomer such as maleic anhydride, or the like. In the rubber-based resin, an elastomer is used as a main component. The adhesive resin, a softener, an anti-aging agent, a chelating agent, and the like are added to the elastomer. The elastic system is a polymer having a low glass transition temperature and a rubbery flat region at a high temperature, and examples thereof include natural rubber, isoprene rubber, styrene, butadiene rubber, and styrene-butyl. Diene rubber, styrene-butadiene block copolymer, styrene-isoprene block copolymer, butyl rubber, polyisobutylene, polyethylene isobutyl ether, chloroprene rubber, acrylonitrile rubber A synthetic rubber or a thermoplastic elastomer such as a graft rubber, but is not limited by these examples. The adhesive agent resin, the softener, the anti-aging agent, and the chelating agent are not particularly limited, and conventionally used ones can be used. For example, examples of the adhesive agent resin include rosin-based resin, terpene-based resin, petroleum resin (aliphatic petroleum resin, aromatic petroleum resin, hydrogenated petroleum resin), coumarone-indene resin, and styrene resin. Resin, etc. Among them, a resin which is a rubber-based resin, particularly a styrene-isoprene block copolymer or a natural rubber-based elastomer, is particularly preferable. The apparatus for cleaning the coating head of the present invention is that the adhesive tape is rolled out by a roll, and the apparatus preferably has a winding-out means for intermittently supplying the adhesive tape, and winding the cleaned adhesive tape. Rolling means, means for controlling the tension of the adhesive tape, means for controlling the amount of the adhesive tape, -24-200911390 and means for detecting the residual amount of the adhesive tape. The tension of the adhesive tape is not particularly limited, and is preferably 10 to 1 000 N/m. If it is smaller than l〇N/m, the conveyance of the adhesive tape becomes unstable, wrinkles are generated, and the pressing tends to become uneven. If it is larger than 1 000 N/m, it is not preferable because the driving device for applying the local tension is large, or the load of the device is increased and it is easily deteriorated. It is preferably 30 to 200 N/m. It is also preferable to provide various wrinkle stretching means or to provide means for preventing electrification. In particular, when the amount of charge is less than or equal to 1000 kV, it is easy to prevent discharge and it is easy to prevent dust from adsorbing. If it is 100kV or less, it is better. Further, in the case where a coating failure occurs, the paste may be attached to the discharge port surface in a large amount due to the disorder of the paste discharge. In this case, it is necessary to repeat the cleaning with the adhesive tape several times, and it takes a long time, and when the adhesive tape is pressed, there is a fear that the paste spreads greatly and the coating head is contaminated unexpectedly. For such a large amount of paste adhesion, the monofilament fineness by the conventional technique is preliminarily provided. The wiping off mechanism of the discharge port surface made of ultra-fine fiber braid of 0 1 taxi (t e X) is preferable in terms of production efficiency. By using a single filament denier 0. The ultrafine fiber woven fabric of 0 1 or less can be cleaned without removing the residue even if the paste contains a fine inorganic powder of about several M m. In this case, the cleaning solution is further sprayed onto the woven fabric, and the paste can be easily removed. In this way, even in the case of a combination of conventional techniques, when compared with the coating head cleaning method by only the wiping off of the woven fabric, the damage of the coating head can be greatly suppressed because the friction amount at the time of wiping can be greatly reduced. . -25- 200911390 The invention is particularly suitable for paste viscosity of 10~100Pa. s situation. When the right side is less than 10 P a · S, even if it is not applied, there is a tendency that the paste tends to drip from the coating head, and the transfer amount is likely to occur depending on the amount of adhesion. In addition, if l〇〇Pa. When s is large, the discharge pressure is too high, and it is difficult to increase the coating speed. The transfer residue is likely to occur depending on the amount of adhesion, which is not preferable. More preferably 20~7 OPa ♦ s. In addition, the paste viscosity was measured using a Brookfield viscometer at a temperature of 25 ° C and a friction rate of 2. The sputum measured under 4s-1. Further, the phosphor paste for use in the production of a coating liquid plasma display, a paste for a reflective layer, a dielectric paste, an electrode paste, or the like, may be selected in accordance with a coating material. As an example, the phosphor paste contains a phosphor powder, a binder, an additive, a solvent, and the like. The present invention is more effective when combined with conventional charged coating. The charge coating is a coating method in which a charge is applied to any one of a coating head, a paste, or a substrate, and the paste is brought close to the substrate by using an electrostatic force. In the electrification coating, since the adhesion of the paste toward the nozzle discharge port surface tends to decrease after the application is completed, the transfer time of the paste can be shortened in combination with the present invention, and the production efficiency is extremely satisfactory. The coating head of the present invention can be better cleaned when the nozzle for the production of the 7K device is used for the coating of the nozzle. Even in the case where the discharge surface of the conventional technique is contaminated or the scratch is scratched and cannot be uniformly applied, the coating head cleaning method of the present invention is applied to the sheet-like manner in which the start and end of each side coating is performed. At the time of coating, since the discharge port surface is free from scratches, it can be cleaned without any residual paste, so that a coating surface having a very uniform and high quality -26 - 200911390 can be obtained. In particular, when it is used for coating a phosphor paste for plasma display manufacturing, it is preferable because the effect is large. [Embodiment] Hereinafter, an embodiment in which the present invention is applied to the cleaning of a phosphor coating head for plasma display manufacturing will be described. However, the present invention is not limited to the embodiment. The phosphor paste used in the present invention utilizes the following method. And made. The weight ratio of the inorganic phosphor powder was set to 19, and it was dispersed and mixed with a 16 wt% terpineol/benzyl alcohol (3/1) solution of ethyl cellosolve in a weight ratio of 20 to prepare a fluorescent light. Body paste. The phosphor powder used is (Y, Gd)BCh: Eu in red light emission, ZnSiCU: Μη in green light emission, and BaMgAhoOu: Eu in blue light emission. The cumulative average particle size and maximum particle size of the phosphor powders of these colors are R phosphors: 2. 7/z m, 27/z m; B phosphor: 3. 7// m, 27/zm; G phosphor: 3. 6/zm, 25#!!!. In addition, the respective viscosity is R phosphor: 52 Pa·s; B phosphor: 39 Pa·s; G phosphor: 40 Pa·s ο The coating head coated with the phosphor is utilized by the coating head. In the longitudinal direction, there are 1 920 coating heads having a discharge port of 100 Å in diameter, and a pressure of 200 to 700 kPa is applied to the inside by air, so that the speed of the substrate is changed within a range of 20 to 200 mm/s. The phosphor paste is ejected, and the phosphor paste is filled between the predetermined partition walls. The adhesive tape used for the phosphor paste attached to the discharge port and the discharge port surface of the coating paste is as follows: Adhesive tape: ELE-CLEANER (trademark of -27- 200911390) manufactured by Nitto Denko Corporation of Japan . In addition, the fiber braid is as follows: Ultrafine fiber braid: TORAY AG (registered trademark). The washing solvent for the wet knit is acetone. The evaluation is carried out as follows: If the 6th (c) paste is poured on the edge of the discharge hole, the coating will be normal. Therefore, the ratio of the ejection orifice to which the portion of the ejection orifice after a series of cleaning operations is poured is formed as X, and 10% or less is marked as ◎. Example 1 The phosphor paste prepared as described above was filled in the coating head to apply a phosphor paste to a predetermined partition wall, and the adhesive tape was formed into a roll shape, and the outlet and the spray were shown in Fig. 1. A rubber roller (30 Α hardness and 10 mm rubber thickness) provided on the outlet surface to which the coating head of the phosphor paste was attached to the nozzle discharge surface was used as the first pressing operation. Make the adhesive layer of the adhesive tape, the discharge port and the discharge port face, using the pressure 0. 2 MPa, while holding the adhesive head for 4 seconds, the direction of the discharge port surface was moved at 50 m m / s, and the lkg/m sheets were peeled off from the discharge port surface. A thin paste film at the discharge port.
製之 TORAYSEE 圖所示，若殘留 受到阻礙之傾向 面，調查以殘留 孔數相對於所有 1 0 %以下標示爲 塗布頭中，使用 間。之後，使用 方法，進行在噴 清淨。將對向於 ΐ 徑 60mm、Shore 構材使用，實施 接觸於塗布頭之 膠帶推壓於塗布 推壓構材於疏離 力施加於黏膠帶 5 0 %部分殘留有 -28- 200911390 於第2次推壓之前，從噴出口微量噴出塗布 使直徑約3 00 # m之積存塗布液附著於各噴出口 量噴出動作。 接著；傳送20mm之黏膠帶，使新的黏著面 位置’實施第2次推壓。再度使用推壓構材， 0.2MPa將黏膠帶推壓於塗布頭的同時，保持2秒 以50mm/s使推壓構材於疏離噴出口面之方向移 ，將lkg/m之張力施加於黏膠帶以從噴出口面剝 。附著有殘留糊之噴出口約減少0.5%。實施連葡 之清淨動作後，刮傷並未發生。 實施例2 將直徑200mm之橡膠輥使用於推壓構材。另 相同於實施例1之條件加以實施。附著有殘留糊 約減少5 %。實施連續2000次之拭除後’拭除刮 生。 實施例3 將Shore A橡膠硬度60度之橡膠輕使用於推 另外，利用相同於實施例1之條件加以實施。附 糊之噴出口約減少8 % °實施連續2000次之拭除 刮傷並未發生。 比較例1 將纖維編作爲帶狀拭除構材使用’實施專利 摩擦拭除。附著有殘留糊之噴出口約減少〇·2% ° 2000次之拭除後’發生嚴重的拭除刮傷’成爲無 液，進行 附近的微 移向轉印 利用壓力 鐘之後， 動的同時 離黏著面 I 2000 次 外，利用 之噴出口 傷並未發 壓構材。 著有殘留 後，拭除 文獻1之 實施連續 法使用。 -29- 200911390 比較例2 推壓4秒鐘，接著不從噴出口微里噴出塗布液’貝施 2秒鐘推壓。另外，利用相同於貫施例1之條件加以實施 。附著有殘留糊之噴出口約達到2 〇 % ’無法使用。 【表1】 拭除構材 動作 微小噴出 輥徑 橡膠硬度 拭除性 —---1 S到傷 實施例1 膠帶 2次推壓4s, 2s 有 Φ60 30度 ◎ 〇 實施例2 膠帶 2次推壓4s, 2s 有 Φ200 30度 〇 0 實施例3 膠帶 2次推壓4s, 2s 有 Φ60 60度 〇 _0 比較例1 布 摩擦 一 — — ◎ 比較例2 膠帶 2次推壓4s, 2s Μ Φ60 30度 X 〇 —--- 【產業上可利用性】 適合於電漿顯示器或液晶顯示器等薄型顯示器之製造 方法。 #胃明適合於朝向高濃度含有固體粒子的高黏度糊之 @ ’對於噴墨等低黏度噴液亦能夠適用。 【圖式簡單說明】 $ 1圖係顯示本發明之塗布頭清淨方法之實施形態的 示意圖。 第2圖係顯示於本發明之清淨方法中之噴出口附近的 殘留糊附著狀態的示意圖。 $ 3圖係顯示利用分散器法所進行之螢光體糊塗布方 法的示意圖。 第4圖係顯示習知之塗布頭清淨方法的示意圖。 第5圖係顯示噴出口附近的刮傷狀態的示意圖。 -30- 200911390 第6圖係顯示於僅進行1次推壓動作之清淨方法中之 噴出口附近的殘留糊附著狀態的示意圖。 【主要元件符號說明】 1 塗 布 頭 2 螢 光 體 糊 3 基 板 4 加 壓 配 管 5 噴 出 □ 6 噴 出 P 面 7 所 噴 出 的 糊 8 殘 留 糊 8a 少 量 殘 留 糊 8b 大 量 殘 留 糊 8 c 中 等 程 度 量 殘 留 糊 9 由 編 織 物 構 成 的 拭除構材 10 推 壓 構 材 11 摩 擦 方 向 12 刮 傷 13a 黏 著 狀 態 之 黏 附 物 13b 濕 潤 狀 能 之 黏 附 物 13c 轉 印 良 好 部 分 14 黏 膠 帶 15 皺 褶 展 平 導 向 裝 置 16 所 轉 印 的 糊 17 積 存 塗 布 液 -31 -As shown in the TORAYSEE diagram, if the residual tendency is hindered, the investigation indicates that the number of residual pores is indicated as the coating head in the number of residual pores. After that, use the method to perform the cleaning. For the 60mm, Shore material, the tape that is in contact with the coating head is pressed against the coating material, and the sparse force is applied to the adhesive tape. The remaining part of the adhesive tape is -28-200911390. Before the pressing, a small amount of the coating liquid from the discharge port was applied to adhere the coating liquid having a diameter of about 300 Å to each of the discharge ports. Next, a 20 mm adhesive tape was conveyed, and the new adhesive surface position was subjected to the second pressing. After using the pressing member again, 0.2 MPa pushes the adhesive tape against the coating head, while holding the pressing member in the direction of the sparse ejection exit face at 50 mm/s for 2 seconds, and applying the tension of lkg/m to the adhesive. The tape is peeled off from the discharge port. The discharge port to which the residual paste adhered was reduced by about 0.5%. After the clean action of the Portuguese, the scratch did not occur. Example 2 A rubber roller having a diameter of 200 mm was used for pressing a member. The same was carried out under the same conditions as in Example 1. The residual paste adhered was reduced by 5%. After the 2,000 consecutive wipes were performed, the wipes were wiped off. Example 3 A glass having a Shore A rubber hardness of 60 degrees was lightly used for pushing, and was carried out under the same conditions as in Example 1. The discharge of the paste is reduced by about 8%. The 2,000 consecutive wipes have not occurred. Comparative Example 1 The fiber woven fabric was used as a belt-shaped wiping member. The discharge port to which the residual paste adhered is reduced by about 〇·2% ° After 2,000 times of wiping, the 'severe wiping and scratching' becomes liquid-free, and the nearby micro-transfer is transferred to the pressure-using clock. When the adhesive surface I was 2000 times, the spray outlet was not used to compress the material. After the residue has been removed, the literature 1 is used to implement the continuous method. -29- 200911390 Comparative Example 2 After pressing for 4 seconds, the coating liquid was not sprayed from the discharge port to be pushed for 2 seconds. Further, it was carried out by the same conditions as in the first embodiment. The spray port to which the residual paste adhered is approximately 2 〇 % ‘unusable. [Table 1] Erasing member action Micro-spraying roll diameter Rubber hardness wiping property----1 S to injury Example 1 Adhesive tape 2 times push 4s, 2s Φ60 30 degrees ◎ 〇Example 2 Tape 2 push Pressure 4s, 2s Φ200 30 degree 〇0 Example 3 Tape 2 times push 4s, 2s Φ60 60 degrees 〇_0 Comparative example 1 cloth friction one———— ◎ Comparative example 2 tape 2 times push 4s, 2s Μ Φ60 30 degrees X 〇—--- [Industrial Applicability] It is suitable for the manufacturing method of thin display such as plasma display or liquid crystal display. #胃明 is suitable for high-viscosity pastes containing solid particles at high concentrations. It is also applicable to low-viscosity sprays such as inkjet. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing an embodiment of the coating head cleaning method of the present invention. Fig. 2 is a view showing the state of attachment of the residual paste in the vicinity of the discharge port in the cleaning method of the present invention. The $3 figure shows a schematic diagram of the phosphor paste application method by the disperser method. Fig. 4 is a schematic view showing a conventional method of cleaning a coating head. Fig. 5 is a view showing a state of scratch near the discharge port. -30- 200911390 Fig. 6 is a schematic view showing a state in which the residual paste is adhered in the vicinity of the discharge port in the cleaning method in which only one pressing operation is performed. [Explanation of main component symbols] 1 Coating head 2 Phosphor paste 3 Substrate 4 Pressurized piping 5 Discharge □ 6 Discharge P surface 7 Dissolved paste 8 Residual paste 8a A small amount of residual paste 8b A large amount of residual paste 8 c A moderate amount of residual paste 9 Wipe member made of woven material 10 Pushing member 11 Friction direction 12 Scratch 13a Adhesive 13b in adhesive state Adhesive 13c in wet condition Transferable portion 14 Adhesive tape 15 Wrinkle flattening guide 16 Transfered paste 17 accumulated coating solution -31 -