TW202222565A - 黏著層與無機或有機-無機混合基板上沉積導電層的方法以及導電結構 - Google Patents

黏著層與無機或有機-無機混合基板上沉積導電層的方法以及導電結構 Download PDF

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TW202222565A
TW202222565A TW109143496A TW109143496A TW202222565A TW 202222565 A TW202222565 A TW 202222565A TW 109143496 A TW109143496 A TW 109143496A TW 109143496 A TW109143496 A TW 109143496A TW 202222565 A TW202222565 A TW 202222565A
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layer
inorganic
adhesive layer
organic
metal oxide
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TWI789656B (zh
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張佑祥
王偉彥
黃萌祺
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財團法人工業技術研究院
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Priority to US17/199,462 priority patent/US20220177364A1/en
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Abstract

一種黏著層與無機或有機 -無機混合基板上沉積導電層的方法以及導電結構。所述黏著層適於將導電層沉積至無機或有機-無機混合基板上,其包括金屬氧化物層以及界面層。所述金屬氧化物層設置於所述無機或有機-無機混合基板上。所述界面層設置於所述金屬氧化物層與所述無機或有機-無機混合基板之間。所述金屬氧化物層包括金屬氧化物以及螯合劑,且所述界面層包含所述金屬氧化物、所述螯合劑以及金屬-非金屬-氧化物複合材料。

Description

黏著層與無機或有機-無機混合基板上沉積導電層的方法以及導電結構
本揭露是有關於一種黏著層及其應用,且特別是有關於一種黏著層與無機或有機-無機混合基板上沉積導電層的方法以及導電結構。
在目前各種科技產品中,金屬層通常需要沉積在無機基板上以作為線路圖案。鑑於無機基板與金屬層之間附著力的問題,一般皆以乾式沉積的方式(例如物理氣相沉積(physical vapor deposition,PVD)或化學氣相沉積(chemical vapor deposition,CVD))將金屬層沉積在無機基板上。
然而,使用乾式沉積的方式來形成金屬層耗費較高。此外,對於具有高深寬比(aspect ratio)的盲孔(blind via)與通孔(through via)來說,在乾式沉積的過程中往往面臨階梯覆蓋率(step coverage)過低以及產生懸凸(overhang)的問題,因此增加了製程缺陷以及降低了產品可靠度。
目前以金屬氧化層來作為金屬層與無機基板之間的黏著層。此方法一般是在無機基板上均勻塗佈一層金屬氧化層(例如氧化鋅層),藉由金屬氧化層來提升無機基板與金屬層之間的附著力。然而,金屬氧化層容易受到具有高鹼性或高酸性的無電鍍(electroless plating)液的蝕刻,導致金屬氧化層損壞而降低無機基板與金屬層之間的附著力。因此,亟需一種黏著層以作為金屬層與無機基板接合之用。
本揭露的實施例提供一種黏著層,其包括含有金屬氧化物以及螯合劑的金屬氧化物層。
本揭露的實施例提供一種於無機或有機-無機混合基板上沉積導電層的方法,其使用包括含有金屬氧化物以及螯合劑的金屬氧化物層的黏著層。
本揭露的實施例提供一種導電結構,其藉由包括含有金屬氧化物以及螯合劑的金屬氧化物層的黏著層來將導電層接合至基板。
本揭露的實施例的黏著層適於將導電層沉積至無機或有機-無機混合基板上,其包括金屬氧化物層以及界面層。金屬氧化物層設置於無機或有機-無機混合基板上。界面層設置於金屬氧化物層與無機或有機-無機混合基板之間。金屬氧化物層包括金屬氧化物以及螯合劑,且界面層包含金屬氧化物、螯合劑以及金屬-非金屬-氧化物複合材料。
本揭露的實施例的於無機或有機-無機混合基板上沉積導電層的方法包括以下步驟。於無機或有機-無機混合基板上塗佈黏著材料。進行熱處理,以使黏著材料轉變晶相而形成黏著層,其中黏著層包括金屬氧化物層以及界面層,界面層形成於無機或有機-無機混合基板上,且金屬氧化物層形成於界面層上。進行濕式沉積製程,以於黏著層上形成導電層。金屬氧化物層包括金屬氧化物以及螯合劑,且界面層包含金屬氧化物、螯合劑以及金屬-非金屬-氧化物複合材料。
本揭露的實施例的導電結構包括無機或有機-無機混合基板、黏著層以及導電層。黏著層設置於無機或有機-無機混合基板上。導電層設置於黏著層上。黏著層包括金屬氧化物層以及界面層。金屬氧化物層設置於無機或有機-無機混合基板上。界面層設置於金屬氧化物層與無機或有機-無機混合基板之間。金屬氧化物層包括金屬氧化物以及螯合劑。界面層包含金屬氧化物、螯合劑以及金屬-非金屬-氧化物複合材料。
為讓本揭露的上述特徵和優點能更明顯易懂,下文特舉實施例,並配合附圖作詳細說明如下。
下文列舉實施例並配合附圖來進行詳細地說明,但所提供的實施例並非用以限制本揭露所涵蓋的範圍。此外,附圖僅以說明為目的,並未依照原尺寸作圖。為了方便理解,在下述說明中相同的元件將以相同的符號標示來說明。
關於文中所提到「包含」、「包括」、「具有」等的用語均為開放性的用語,也就是指「包含但不限於」。
此外,文中所提到「上」、「下」等的方向性用語,僅是用以參考圖式的方向,並非用以限制本揭露。
當以「第一」、「第二」等的用語來說明元件時,僅用於將這些元件彼此區分,並不限制這些元件的順序或重要性。因此,在一些情況下,第一元件亦可稱作第二元件,第二元件亦可稱作第一元件,且此不偏離申請專利範圍的範疇。
本揭露實施例的黏著層適於將導電層沉積至無機或有機-無機混合基板上。本揭露實施例的黏著層藉由濕式製程形成於無機或有機-無機混合基板上,因此具有製程簡單以及低成本的特性。此外,本揭露實施例的黏著層具有優異的耐酸鹼特性,因此在以無電鍍製程形成導電層的過程中黏著層不會受到無電鍍液的蝕刻而損壞。以下將對本揭露實施例的黏著層作詳細說明。
圖1繪示出本揭露實施例的黏著層的剖面示意圖。請參照圖1,本實施例的黏著層10設置於基板100上,用以將導電層102沉積於基板100上。在本實施例中,基板100可為無機基板或有機-無機混合基板。舉例來說,無機基板的材料可以是玻璃、陶瓷、矽、氧化矽或其組合,而有機-無機混合基板的材料可以是碳-矽、高分子聚合物-矽、碳-陶瓷、高分子聚合物-陶瓷或其組合。此外,在本實施例中,導電層102可作為後續利用電鍍製程形成的導電層104的種子層(seed layer),但本揭露不限於此。導電層102的材料例如為銅,但本揭露不限於此。導電層104可為金屬導電層或非金屬導電層,其例如為金層、銀層、銅層、鎳層、鈷層、錫層、鎢層、銠層、石墨層、石墨烯層或其組合,本揭露不對此進行限定。
在本實施例中,黏著層10包括界面層10a以及金屬氧化物層10b。金屬氧化物層10b設置於基板100上,且界面層10a設置於金屬氧化物層10b與基板100之間。黏著層10的總厚度例如介於10.5 nm至60 nm之間,其中界面層10a的厚度例如介於0.5 nm 至10 nm之間,金屬氧化物層10b的厚度例如介於10 nm 至50 nm 之間。
在本實施例中,金屬氧化物層10b包括金屬氧化物以及螯合劑。金屬氧化物構成為金屬氧化物層的主要成分,其可以是氧化鋅、二氧化鈦、氧化鋁、氧化鎳、氧化錫、氧化鈷、氧化銠、二氧化鋯或其組合。金屬氧化物可提升導電層102與基板100之間的附著力。此外,螯合劑可為乙二胺(EN)、2,2'-聯吡啶(Bipy)、乙二胺四乙酸(EDTA)、氨基三乙酸(NTA)、二乙三胺五乙酸(DPTA)、檸檬酸(CA)、酒石酸(TA)、葡萄糖酸(GA)、其衍生物或其組合。在一實施例中,螯合劑可為含氮螯合劑,例如乙二胺四乙酸。
在本實施例中,界面層10a包含金屬氧化物、螯合劑以及金屬-非金屬-氧化物複合材料。詳細地說,在形成黏著層10的過程中,於基板100上塗佈一層含有金屬氧化物與螯合劑的黏著材料,而金屬氧化物與螯合劑中的一部分會與基板100的材料進行反應而在基板100的表面上形成界面層10a,且另一部分的金屬氧化物與螯合劑則形成金屬氧化層10b。因此,所形成的界面層10a會包括與金屬氧化層10b中相同的金屬氧化物與螯合劑,且含有金屬氧化物、螯合劑與基板100的材料反應而形成的金屬-非金屬-氧化物複合材料。在一實施例中,取決於基板100的材料,金屬-非金屬-氧化物複合材料例如是金屬-矽-氧化物複合材料。
在黏著層10中,基於成分重量比例分析(例如場發射穿透式電子顯微鏡(field emission transmission electron microscopy,FETEM)電子數據系統(electronic data system)分析),以黏著層的總重量計,金屬氧化物的含量例如介於20%至85%或40%至60%之間。若金屬氧化物的含量太高或太低,則導電層102和基板100之間的附著力會不佳。螯合劑的含量例如介於2%至7%或3%至5%之間。若螯合劑的含量太高或太低,則導電層102和基板100之間的附著力不佳。金屬-非金屬-氧化物複合材料的含量例如例介於2%至7%或4%至6%之間。若金屬-非金屬-氧化物複合材料的含量太高或太低,則導電層102與基板100之間的附著力不佳。
此外,黏著層10具有結晶相。在本實施例中,黏著層10具有銳鈦礦結晶相,具有銳鈦礦結晶相的黏著層10的形成溫度低於具有其它結晶相的黏著層的形成溫度,且在形成過程中容易控制晶相成長。
以下將描述本揭露實施例的於無機或有機-無機混合基板上沉積導電層的方法,其中藉由黏著層可將導電層沉積於基板上。
圖2為本揭露實施例的於無機或有機-無機混合基板上沉積導電層的方法的流程圖。在本實施例中,將以圖1中的黏著層10為例來進行說明,且與圖1中相同的元件將不再額外說明。
請參照圖2,在步驟200中,於基板100上塗佈黏著材料。在本實施例中,黏著材料例如介於10.5 nm至60 nm之間。在本實施例中,黏著材料經由濕式製程而形成於基板100上。所述濕式製程可以是旋轉塗佈(spin coating)、浸泡(immersion)、噴塗(spray coating)、網版印刷(screen printing)或刮刀塗佈(blade coating),但本揭露不限於此。在本實施例中,經由所述濕式製程,黏著材料可快速且大面積地形成於基板100上。黏著材料用以形成黏著層10,其包括金屬氧化物的前驅物以及螯合劑。金屬氧化物的前驅物例如為氧化鋅前驅物、二氧化鈦前驅物、氧化鋁前驅物、氧化鎳前驅物、氧化錫前驅物、氧化鈷前驅物、氧化銠前驅物、二氧化鋯前驅物或其組合。在一些實施例中,二氧化鈦前驅物例如為異丙醇鈦、四氯化鈦、丁醇鈦、異丁醇鈦、鈦酸乙酯、二異丙氧基雙乙醯丙酮鈦、丁氧基雙(乙醯乙酸乙酯)鈦酸酯、二丁氧基雙(乙醯乙酸乙酯)鈦酸酯、二(三乙醇胺)鈦酸二異丙酯或其組合。
在黏著材料中,金屬氧化物的前驅物的濃度例如介於0.1 M至1 M之間,且溶劑例如為水、醇或其組合。此外,在黏著材料中,螯合劑的濃度例如介於0.1 M至1 M之間,且溶劑例如為水、醇或其組合。螯合劑可對金屬氧化物的前驅物進行螯合,以提供金屬氧化物之間的接附能力。
在步驟202中,進行熱處理,以使黏著材料轉變晶相及強化而形成黏著層10。在本實施例中,熱處理可以是快速熱退火(rapid thermal anneal,RTA)、爐管加熱或微波退火。在熱處理的過程中,黏著材料中來自金屬氧化物的前驅物以及螯合劑的溶劑揮發,且由金屬氧化物的前驅物形成的部分金屬氧化物、部分螯合劑會與基板100的材料產生反應,形成金屬-非金屬-氧化物複合材料。此時,金屬-非金屬-氧化物複合材料、部分的金屬氧化物以及部分的螯合劑形成了位於基板100的表面上的界面層10a,且另一部分的金屬氧化物以及螯合劑形成了金屬氧化物層10b。如此一來,於基板10上形成了由界面層10a與金屬氧化物層10b構成的黏著層10。此外,在形成黏著層10之後,可視實際需求而對黏著層10進行退火處理,以降低黏著層10中的應力。
在步驟204中,可視實際需求對黏著層10進行表面處理。在本實施例中,表面處理包括以下步驟。首先,使觸媒吸附於黏著層上以進行表面改質。接著,使用活化劑進行活化步驟。所述觸媒例如為錫鈀膠體觸媒、離子鈀觸媒、高分子鈀觸媒或其組合。
在步驟206中,進行濕式沉積製程,以於黏著層10上形成導電層102。導電層102在後續製程中可作為形成其他導電層時的種子層。在本實施例中,所述濕式沉積製程例如為無電鍍製程(或稱化學鍍製程)。在本實施例中,由於黏著層10包括金屬氧化物、螯合劑以及金屬-非金屬-氧化物複合材料而具有高的耐酸鹼特性,因此在上述濕式沉積製程中,黏著層10不會受到具有高酸鹼性的製程溶液的蝕刻而損壞,進而可達成導電層與無機或有機-無機混合基板之間的高附著力。此外,在本實施例中,黏著層10以及導電層102皆是利用濕式製程來形成,因此可降低製程困難度以及製程成本。在本發明一實施例中,導電層包括金屬導電層與非金屬導電層,其包含金(Au)、銀(Ag)、銅(Cu)、鎳(Ni)、鈷(Co)、錫(Sn)、鎢(W)、銠(Ru)、石墨(C)、石墨烯(GO)或其組合,但本揭露不限於此。
在步驟208中,可利用導電層102作為種子層來進行電鍍製程,以於導電層102上形成導電層104。經由步驟200至步驟208,導電層104可沉積於基板10上。
以下將以實施例來對本揭露的黏著層進行驗證。
實施例 1 (形成黏著層)
首先,將玻璃基板進行清洗(標準RCA清洗),以去除玻璃基板的表面上的有機雜質與金屬微粒,其中RCA清洗溶液包含氨水、雙氧水以及水(比例為1:4:20),而清洗溫度介於70 °C至90 °C。然後,將清洗過後的玻璃基板利用水進行三次清洗,再使用氮氣吹乾。接著,將玻璃基板放置於旋轉塗佈裝置上進行黏著層塗佈,其中黏著層溶液包含異丙醇、二異丙氧基雙乙醯丙酮鈦(titanium diisopropoxide bis(acetylacetonate),TTDB)(二氧化鈦前驅物)以及螯合劑(EDTA)。二氧化鈦前驅物的濃度介於0.1 M至1 M之間,螯合劑的濃度介於0.1 M至1 M之間,且旋塗轉數控制在3000 rpm至6000rpm。旋塗完成後,將附著有黏著層的玻璃基材進行高溫燒結,其中燒結溫度控制在400 °C至600°C之間。燒結後,可得到實施例1的黏著層。
對實施例1的黏著層進行高解像能電子顯微鏡(high resolution transmission electron microscope,HRTEM)分析,可得知實施例1的黏著層具有結晶相,如圖3所示。
對實施例1的黏著層進行低掠角X射線繞射(grazing incidence X-ray Diffraction,GIXRD)分析,可得知實施例1的黏著層具有結晶相,如圖4所示,實施例1的黏著層的晶相結構為(1,0,1)、(0,0,4)、(2,0,0)、(1,0,5)與(2,1,1),此即為銳鈦礦結晶相。
對實施例1的黏著層進行高解像能電子顯微鏡能量色散X射線光譜元素分佈(HRTEM EDX mapping)分析,可分析出Si、Ti、O、N、Al、Ca以及C等元素,如圖5所示。因此,可得知實施例1的黏著層確實包括金屬氧化物層(二氧化鈦)、含氮螯合劑(EDTA)以及界面層(金屬-非金屬-氧化物複合材料)。
對實施例1的黏著層進行高解像能電子顯微鏡能量色散X射線光譜(HRTEM EDX)分析,可得知實施例1的黏著層包括金屬氧化物層以及界面層,如圖6所示。
將實施例1的黏著層分別浸泡在無電鍍溶液中0秒及60秒,結果如圖7所示。由圖7可以清楚看出,實施例1的黏著層在浸泡60秒後並無明顯的缺陷或異常。因此,可得知實施例1的黏著層具有高的耐酸鹼特性。
以下將以實施例2與比較例來對本揭露的黏著層的效果進行說明。
實施例 2
將實施例1的具有黏著層的玻璃基材浸泡於錫鈀膠體觸媒溶液中進行表面改質,時間為5分鐘至8分鐘。接著,將玻璃基材泡入活化劑中進行活化步驟,時間為1分鐘至3分鐘。然後,將玻璃基材置入商用無電鍍銅的鍍液中,進行金屬化,以得到實施例2的初步樣品,其中無電鍍銅的反應溫度控制在35 °C至38 °C之間,且金屬化的時間為5分鐘至8分鐘。接著,將樣品進行快速熱退火處理,其中溫度範圍控制在400 °C至600 °C之間,且時間為5分鐘至10分鐘。然後,將樣品進行電鍍銅處理,所形成的銅層的厚度控制在10微米至15微米。之後,將樣品再進行一次快速熱退火處理,以得到實施例2的最終樣品,其中溫度控制在400 °C至600 °C之間,且時間為5分鐘至10分鐘。
比較例(不含螯合劑)
比較例與實施例2的製作方式相同,差異在於比較例之黏著層中不包括螯合劑。
對實施例2的結構以及比較例的結構進行拉力測試(T-peel),結果如圖8所示。由圖8可以清楚看出,含有螯合劑的本揭露的黏著層可使導電層與基板之間具有較高的附著力。
雖然本揭露已以實施例揭露如上,然其並非用以限定本揭露,任何所屬技術領域中具有通常知識者,在不脫離本揭露的精神和範圍內,當可作些許的更動與潤飾,故本揭露的保護範圍當視所附的申請專利範圍所界定者為準。
10:黏著層 10a:界面層 10b:金屬氧化物層 100:基板 102、104:導電層 200、202、204、206、208:步驟
圖1繪示出本揭露實施例的黏著層的剖面示意圖。 圖2為本揭露實施例的於無機基板上沉積導電層的方法的流程圖。 圖3為實施例1的黏著層的高解像能電子顯微鏡(high resolution transmission electron microscope,HRTEM)分析圖。 圖4為實施例1的黏著層的低掠角X射線繞射(grazing incidence X-ray Diffraction,GIXRD)分析圖。 圖5為實施例1的黏著層的高解像能電子顯微鏡能量色散X射線光譜元素分佈(HRTEM EDX mapping)分析圖。 圖6為實施例1的黏著層的高解像能電子顯微鏡能量色散X射線光譜(HRTEM EDX)分析圖。 圖7為實施例1的黏著層浸泡在無電鍍溶液中的結果的場發射掃描式電子顯微鏡(field emission scanning electron microscopy,FESEM)影像圖。 圖8為實施例2的結構以及比較例的結構進行拉力測試(T-peel)的結果。
10:黏著層
10a:界面層
10b:金屬氧化物層
100:基板
102、104:導電層

Claims (21)

  1. 一種黏著層,適於將導電層沉積至無機或有機-無機混合基板上,所述黏著層包括: 金屬氧化物層,設置於所述無機或有機-無機混合基板上;以及 界面層,設置於所述金屬氧化物層與所述無機或有機-無機混合基板之間, 其中所述金屬氧化物層包括金屬氧化物以及螯合劑,且所述界面層包含所述金屬氧化物、所述螯合劑以及金屬-非金屬-氧化物複合材料。
  2. 如請求項1所述的黏著層,其中所述金屬氧化物包括氧化鋅、二氧化鈦、氧化鋁、氧化鎳、氧化錫、氧化鈷、氧化銠、二氧化鋯或其組合。
  3. 如請求項1所述的黏著層,其中所述螯合劑包括乙二胺、2,2'-聯吡啶、乙二胺四乙酸、氨基三乙酸、二乙三胺五乙酸、檸檬酸、酒石酸、葡萄糖酸、其衍生物或其組合。
  4. 如請求項1所述的黏著層,其中所述金屬-非金屬-氧化物複合材料由所述金屬氧化物、所述螯合劑以及所述無機或有機-無機混合基板的材料反應而形成。
  5. 如請求項1所述的黏著層,其中所述黏著層具有結晶相。
  6. 如請求項5所述的黏著層,其中所述結晶相為銳鈦礦結晶相。
  7. 如請求項1所述的黏著層,其中以所述黏著層的總重量計,所述金屬氧化物的含量介於40%至85%之間。
  8. 如請求項1所述的黏著層,其中以所述黏著層的總重量計,所述螯合劑的含量介於2%至7%之間。
  9. 如請求項1所述的黏著層,其中以所述黏著層的總重量計,所述金屬-非金屬-氧化物複合材料的含量介於2%至7%之間。
  10. 如請求項1所述的黏著層,其中所述無機或有機-無機混合基板的材料包括玻璃、陶瓷、矽、氧化矽、碳-矽、高分子聚合物-矽、碳-陶瓷、高分子聚合物-陶瓷或其組合。
  11. 如請求項1所述的黏著層,其中所述導電層的材料包括金、銀、銅、鎳、鈷、錫、鎢、銠、石墨、石墨烯或其組合。
  12. 一種於無機或有機-無機混合基板上沉積導電層的方法,包括: 於所述無機或有機-無機混合基板上塗佈黏著材料;進行熱處理,以使所述黏著材料轉變晶相而形成黏著層,其中所述黏著層包括金屬氧化物層以及界面層,所述界面層形成於所述無機或有機-無機混合基板上,且所述金屬氧化物層形成於所述界面層上; 進行濕式沉積製程,以於所述黏著層上形成導電層, 其中所述金屬氧化物層包括金屬氧化物以及螯合劑,且所述界面層包含所述金屬氧化物、所述螯合劑以及金屬-非金屬-氧化物複合材料。
  13. 如請求項12所述的於無機或有機-無機混合基板上沉積導電層的方法,其中塗佈所述黏著材料的方法包括旋轉塗佈、浸泡、噴塗、網版印刷或刮刀塗佈。
  14. 如請求項12所述的於無機或有機-無機混合基板上沉積導電層的方法,其中所述濕式沉積製程包括無電鍍製程。
  15. 如請求項12所述的於無機或有機-無機混合基板上沉積導電層的方法,其中所述熱處理包括快速熱退火、爐管加熱或微波退火。
  16. 如請求項12所述的於無機或有機-無機混合基板上沉積導電層的方法,其中在形成所述黏著層之後以及在形成進行所述濕式沉積製程之前,更包括對所述進行黏著層表面處理,且所述表面處理包括: 使觸媒吸附於黏著層上以進行表面改質;以及 對所述觸媒進行活化處理。
  17. 如請求項12所述的於無機或有機-無機混合基板上沉積導電層的方法,其中所述金屬氧化物包括氧化鋅、二氧化鈦、氧化鋁、氧化鎳、氧化錫、氧化鈷、氧化銠、二氧化鋯或其組合
  18. 如請求項12所述的於無機或有機-無機混合基板上沉積導電層的方法,其中所述螯合劑包括乙二胺、2,2'-聯吡啶、乙二胺四乙酸、氨基三乙酸、二乙三胺五乙酸、檸檬酸、酒石酸、葡萄糖酸、其衍生物或其組合。
  19. 如請求項12所述的於無機或有機-無機混合基板上沉積導電層的方法,其中所述金屬-非金屬-氧化物複合材料由所述金屬氧化物、所述螯合劑以及所述無機或有機-無機混合基板的材料反應形成。
  20. 如請求項12所述的於無機或有機-無機混合基板上沉積導電層的方法,其中所述黏著層具有銳鈦礦結晶相。
  21. 一種導電結構,包括: 無機或有機-無機混合基板; 黏著層,設置於所述無機或有機-無機混合基板上;以及 導電層,設置於所述黏著層上, 其中所述黏著層包括: 金屬氧化物層,設置於所述無機或有機-無機混合基板上;以及 界面層,設置於所述金屬氧化物層與所述無機或有機-無機混合基板之間, 其中所述金屬氧化物層包括金屬氧化物以及螯合劑,且所述界面層包含所述金屬氧化物、所述螯合劑以及金屬-非金屬-氧化物複合材料。
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