TWI458627B - 金屬覆蓋之酚樹脂積層板 - Google Patents

金屬覆蓋之酚樹脂積層板 Download PDF

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TWI458627B
TWI458627B TW98133532A TW98133532A TWI458627B TW I458627 B TWI458627 B TW I458627B TW 98133532 A TW98133532 A TW 98133532A TW 98133532 A TW98133532 A TW 98133532A TW I458627 B TWI458627 B TW I458627B
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phenol resin
weight
resin composition
metal
type phenol
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TW98133532A
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English (en)
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TW201026494A (en
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Masao Uesaka
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Sumitomo Bakelite Co
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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Description

金屬覆蓋之酚樹脂積層板
本發明係關於金屬覆蓋之酚樹脂積層板。
多使用紙基材酚樹脂積層板作為電子機器等所搭載的印刷電路用基板。但是，此類紙基材酚樹脂積層板、或者使用紙基材酚樹脂作為核心材料，且由其兩面以含浸環氧樹脂之玻璃纖維基材夾住之複合構造的積層板(專利文獻3)，在吸水率、機械強度上具有問題。
作為其替代材，有紙基材環氧樹脂積層板、或者使用紙基材環氧樹脂預浸漬物作為核心材料，並由其兩面以含浸環氧樹脂之玻璃纖維基材夾住作成複合構造的積層板，但是電性特性，特別作為印刷電路基板所必要之長期耐濕性和電性絕緣性並不夠充分(專利文獻1及2)。又，印刷電路基板亦有在高電壓下使用的案例，必須防止因發生漏流所造成的火災。但是，紙基材環氧樹脂積層板、或使用紙基材環氧樹脂預浸漬物作為核心材料，並由其兩面以含浸環氧樹脂之玻璃纖維基材夾住作成複合構造的積層板，具有實際之印刷電路基板的耐漏流性低，且受到電路設計上之約束的問題，期望兼具電性特性、機械強度、耐漏流性等要求的酚樹脂積層板。
專利文獻1：日本專利特開昭61-255850號公報
專利文獻2：日本專利特開昭62-56137號公報
專利文獻3：日本專利特開昭63-39332號公報
本發明為鑑於上述情事而完成者，提供兼具電性特性、機械強度、耐漏流性的酚樹脂積層板。
本發明為以下述(1)~(5)而達成。
(1)　一種金屬覆蓋之酚樹脂積層板，其特徵為：在僅使用1片或指定片數之紙基材中含浸含有甲酚型樹脂之第一酚樹脂組成物之紙基材預浸漬物重疊的中心層狀部的上面側以及下面側，將僅使用1片或指定片數之玻璃纖維基材中含浸含有甲酚型樹脂之第二酚樹脂組成物之玻璃纖維基材預浸漬物重疊的外側層狀部予以積層，更且，將上述上面側及下面側之外側層狀部中之至少單側上積層金屬箔的積層體予以加熱加壓而得。
(2)　如上述(1)記載之金屬覆蓋之酚樹脂積層板，其中，上述積層體之金屬箔為附有接黏劑的金屬箔，使上述接黏劑面與上述玻璃纖維基材預浸漬面以相對向配置。
(3)　如上述(1)或(2)記載之金屬覆蓋之酚樹脂積層板，其中，上述玻璃纖維基材為玻璃織布。
(4)　如上述(1)至(3)中任一項記載之金屬覆蓋之酚樹脂積層板，其中，構成上述第一酚樹脂塗佈液的樹脂組成物、與構成上述第二酚樹脂塗佈液的樹脂組成物係為相同的樹脂組成物。
(5)　如上述(1)至(4)中任一項記載之金屬覆蓋之酚樹脂積層板，其中，於60℃、相對濕度90%環境下放置1000小時後之長期吸濕率為2重量%以下。
若根據本發明，則可提供兼具機械特性、電性特性、耐漏流性之金屬覆蓋之酚樹脂積層板。
以下，詳細說明本發明之金屬覆蓋之酚樹脂積層板。
本發明之金屬覆蓋之酚樹脂積層板，係將調製成液狀之第一酚樹脂組成物(稱為「酚樹脂液」)含浸於紙基材，並在乾燥之紙基材預浸漬物僅使用1片或指定片數重疊之核心材(稱為「中心層狀部」)的上面及下面，設置將第二酚樹脂液含浸於玻璃纖維基材，且乾燥之玻璃纖維基材預浸漬物僅使用1片或指定片數重疊之外側部分(稱為「外側層狀部」)，更且，將至少單面側積層金屬箔之積層體予以加熱加壓而形成。
在使用紙基材含浸酚樹脂組成物之紙基材預浸漬物的核心材上面和下面，將玻璃纖維基材中含浸酚樹脂組成物之玻璃纖維基材預浸漬物以1片或指定片數重疊，使得紙基材酚樹脂積層板中不充分的強度、吸水性改善，或使紙基材環氧樹脂積層板、或者使用紙基材環氧樹脂預浸漬物作為核心材料，並且由其兩面以含浸環氧樹脂之玻璃纖維基材夾住之積層板中不充分的長期耐濕性、電性絕緣性、耐漏流性改善。
在使用紙基材預浸漬物之核心材的上面和下面，使用玻璃纖維基材下，可取得使紙基材酚樹脂積層板中不充分的強度及吸水率改善的效果。
更且，使用酚樹脂下，可在長期耐濕性及電性絕緣性中取得改善效果。紙基材比玻璃纖維基材為吸水性更高的素材，但藉由使紙纖維中含浸樹脂，則可抑制其吸水特性並且可使用作為積層板。紙基材由於吸水性優良故亦為親水性，於此紙纖維內所含浸的樹脂液，期望為更具親水性的樹脂液。若比較樹脂本身的吸水特性，則以環氧樹脂比酚樹脂更優良。但是，環氧樹脂液為拒水性強，即使含浸於紙基材，樹脂亦幾乎不會含浸於紙纖維內，但在使用酚樹脂液時，則樹脂可含浸至紙纖維。
其耐濕效果，在使用JIS-C6481所示之積層板之短期間的浸水試驗中，水的滲透速度必須明確緩慢，但若觀察最終製品形態之印刷配線板所必要的長期耐濕性、和加壓造成的飽和吸濕量，則以使用酚樹脂液為較優，作為印刷板的電性絕緣性亦優良。具體而言，關於長期耐濕性，雖有實施印刷板之絕緣性試驗之一般條件的溫度：60℃、相對濕度90%以1000小時、和溫度：40℃、相對濕度90%以1000小時，但因溫度：60℃、相對濕度90%以1000小時處理者較為嚴格，且可察見更顯著的差別故為佳。溫度：60℃、相對濕度90%以1000小時處理下，若吸濕率為2重量%以上，則作為印刷板的絕緣性降低。期望吸濕率：1.5重量%以下。
又，漏流現象係經由碳化物因短路及發熱而發火的現象，將未碳化的玻璃纖維基材，重疊於紙基材預浸漬物所構成的核心材上面和下面，可取得耐漏流性的改善。
積層板的耐漏流性試驗方法一般以UL-1410所示之方法。以本方法試驗時，酚樹脂與環氧樹脂並無明確差別，但若作成實際的印刷板，以UL-1410為準之方法進行銅電路間的耐漏流性試驗，則以使用酚樹脂為佳。
積層板所用之酚樹脂組成物的詳細組成為後述，但為了表現打穿性，乃使用油改質甲酚型酚樹脂。因此，相較於環氧樹脂，於較低溫下不會分解之進行碳化的苯環濃度低且難發生漏流。
以下，詳細說明各構成。
本發明之酚樹脂積層板，係使用紙基材中含浸第一酚樹脂組成物者作為核心材。此處所謂核心材，係形成於含浸第二酚樹脂組成物之玻璃纖維基材預浸漬物中被夾住之中間層。
本發明所用之第一及第二酚樹脂組成物，均含有甲酚型樹脂。第一及第二酚樹脂組成物可為相同之樹脂組成物且亦可為不同。此處，所謂相同之樹脂組成物，係意指樹脂組成物的固形分組成為相同。第一及第二酚樹脂組成物不僅固形分組成為相同，且以使用相同溶劑為特佳。
第一及第二酚樹脂組成物亦可含有甲酚型酚樹脂、和酚醛清漆型酚樹脂。經由含有甲酚型酚樹脂，則可提高對於紙基材的含浸性。又，可使紙基材酚樹脂積層板低成本化。甲酚型酚樹脂並無特別限定，可使用通常所使用之物質。
甲酚型酚樹脂之含量並無特別限定，但以酚樹脂組成物全體(固形分基準)的20重量%以上為佳，更且以20重量%~80重量%為佳，特別以30~60重量%為佳。甲酚型酚樹脂的含量若為上述範圍內，則後述酚醛清漆型酚樹脂的硬化充分且可提高耐熱性、耐藥品性等。又，具有減低臭味等效果。
本發明之甲酚型酚樹脂並無特別限定，但以含有油改質甲酚型酚樹脂為佳。如此，可提高由酚樹脂積層板之印刷板的打穿性。作為油改質甲酚型酚樹脂，可列舉例如桐油、亞麻仁油、核桃油等之乾性油改質甲酚型酚樹脂；大豆油、綿籽油、紅花油等之半乾性油改質甲酚型酚樹脂等。其中亦以桐油改質甲酚型酚樹脂為佳。如此，可更加提高打穿性。又，上述油改質甲酚型酚樹脂的含量並無特別限定，但以酚樹脂組成物全體(固形分基準)之5~50重量%為佳，特別以10~40重量%為佳。如此，可更加提高酚樹脂積層板的打穿性。
經由含有酚醛清漆型酚樹脂，則可減低未反應之酚及甲醛。酚醛清漆型酚樹脂，相較於甲酚型酚樹脂，於合成時殘存的未反應酚及甲醛少，故使紙基材含浸混合甲酚型酚樹脂和酚醛清漆型酚樹脂的酚樹脂組成物，則可取得未反應之酚及甲醛少的預浸漬物。作為除去甲酚型酚樹脂之未反應酚的方法，已知有將酚樹脂進行水蒸氣蒸餾的方法，因加工步驟增加故為不佳。另一方面，本發明中，因為進行通常實施削減未反應物之酚樹脂組成物的配合，故不會增加步驟且可減低未反應的酚及甲醛。
又，經由與上述甲酚型酚樹脂的併用，則可不使用酚樹脂以外之交聯劑而進行硬化。更且，經由上述甲酚型酚樹脂與酚醛清漆型酚樹脂的組合，則可減低打穿印刷板時所發生的粉。由先前之樹脂組成物所構成的紙基材酚樹脂積層板，打穿印刷板時，由打穿的剖面發生樹脂組成物等之粉。此類粉對焊錫的塗敷性和接續可靠性造成影響。
上述酚醛清漆型酚樹脂可列舉例如苯酚酚醛清漆型樹脂、雙酚A酚醛清漆型酚樹脂、雙酚F酚醛清漆型酚樹脂、甲酚酚醛清漆型酚樹脂、烷基苯酚酚醛清漆型酚樹脂等。其中亦以苯酚酚醛清漆型樹脂、雙酚F酚醛清漆型酚樹脂、甲酚酚醛清漆型酚樹脂為佳。如此，可更加減低打穿印刷板時發生的粉。
上述酚醛清漆型酚樹脂的含量並無特別限定，但以酚樹脂組成物全體(固形分基準)之3~30重量%為佳，特別以5~20重量%為佳。若酚醛清漆型酚樹脂的含量為上述範圍內，則可減低臭味等之同時，可減低打穿印刷板時發生的粉。
又，在不違反本發明目的之範圍中，可配合鹵素化合物、磷化合物、胺基樹脂等之難燃性化合物。上述難燃性化合物之含量並無特別限定，但以酚樹脂組成物全體(固形分基準)之5~30重量%為佳，特別以10~20重量%為佳。如此，不會損害紙基材酚樹脂積層板的特性且可提高難燃性。鹵素化合物可列舉例如四溴雙酚A(TBBA)、TBBA-環氧低聚物等。
作為磷化合物，可列舉例如磷酸酯、縮合磷酸酯、氧化膦等。例如作為磷酸酯，可列舉例如磷酸三乙酯、磷酸三丁酯、磷酸三苯酯、磷酸三甲苯酚酯、磷酸甲苯酚基二苯酯、磷酸間苯二酚基二苯酯、磷酸三異丙基苯酯等，且其可使用1種或2種以上之混合系。其中，以磷酸三苯酯、磷酸三甲苯酚酯、磷酸甲苯酚基二苯酯中選出一種以上之磷化合物，就取得之容易性方面而言為佳。
胺基樹脂例如為三聚氰胺樹脂、胍胺樹脂等，但在提高難燃化效果上以三聚氰胺樹脂為佳。胺基樹脂為三聚氰胺和胍胺等之胺化合物與甲醛等之醛類的初期反應物，亦包含此等羥甲基之一部分或全部以甲醇、丁醇等之低級醇予以醚化者。
上述金屬箔為附有接黏劑的金屬箔，亦可使上述接黏劑面與上述玻璃纖維基材預浸漬面相對向配置。經由使用附有接黏劑之金屬箔，可取得耐漏流性強化和安定的銅箔密合性。作為接黏劑，並無特別限定，但以可應付耐漏流的接黏劑為佳。
其次，說明關於預浸漬物。本發明之酚樹脂積層板的紙基材及玻璃纖維基材預浸漬物，係將上述之酚樹脂組成物含浸於基材而成者。如此，可取得未反應之酚及甲醛少的酚樹脂積層板。作為紙基材，可列舉例如牛皮紙、棉絨紙等。又，以水溶性酚樹脂、羥甲基三聚氰胺樹脂等進行前處理之紙基材亦被包含於本發明。
作為玻璃纖維基材，並無特別限定，可使用玻璃織布、玻璃不織布等。玻璃織布因可取得比玻璃不織布更高的強度，故為佳。
將酚樹脂組成物含浸於基材的方法，可使用通常所使用的方法。可列舉例如，將基材浸漬於樹脂清漆的方法、以各種塗敷器予以塗佈之方法、以噴霧吹附法等。
預浸漬物的樹脂含浸率並無特別限定，通常，為35~70重量%。預浸漬物樹脂含浸率為根據下式計算。
預浸漬物樹脂含浸率=[(預浸漬物重量-基材重量)/預浸漬物重量]×100
核心部分所用之預浸漬物的片數、及核心部分之上面與下面重疊之預浸漬物的片數適當決定即可，於核心部分可僅使用1片預浸漬物，亦可於核心部分之上面與下面僅重疊1片預浸漬物。
於要求積層板強度之情形中，在核心部分或核心之外側部分(上面部分與下面部分)中，或者在兩者中，積層2片以上預浸漬物。積層預浸漬物時，關於個別部分，以2~10片之範圍為佳，且以4~8片之範圍為更佳。
作為本發明之酚樹脂積層板之積層條件，加熱溫度並無特別限定，以130~240℃為佳，且特別以140~200℃為佳。
又，上述加壓之壓力並無特別限定，以4~15MPa為佳，且特別以7~12MPa為佳。
加壓時間並無特別限定，通常為60分鐘~80分鐘。
[實施例]
以下，根據實施例及比較例詳細說明本發明，但本發明不被限定於此。說明中，「%」為表示「重量%」。
(實施例1) [未改質甲酚型酚樹脂之製造]
將苯酚1000克、37%甲醛水溶液980克、三乙胺20克所構成之混合物以60℃反應2小時，其次於減壓下濃縮，並以甲醇稀釋取得樹脂部分50%之未改質甲酚型酚樹脂清漆。
[酚醛清漆型酚樹脂之製造]
裝入苯酚1000克和草酸10克，升溫至100℃，並將37%甲醛水溶液450克歷60分鐘逐次添加，一邊以100℃迴流一邊反應1小時。其後，進行常壓蒸餾且升溫至130℃為止，並於500Pa之減壓下進行減壓蒸餾且升溫至190℃為止，將其以甲醇稀釋，取得樹脂部分50%之酚醛清漆型酚樹脂。
[油改質甲酚型酚樹脂之製造]
將苯酚1600克和桐油1000克在對甲苯磺酸存在下，以95℃反應2小時，再加入對甲醛650克、六亞甲基四胺30克、甲苯2000克並以90℃反應2小時後，於減壓下濃縮，將其以甲苯與甲醇之混合溶劑稀釋，取得樹脂部分50%之油改質酚樹脂清漆(油改質量30%)。
(紙基材及玻璃纖維基材含浸用之樹脂塗佈液的調製)
配合上述之未改質甲酚型酚樹脂清漆100重量份(固形分基準為25.6%)、油改質甲酚型酚樹脂清漆100重量份(25.6%)、酚醛清漆型酚樹脂清漆50重量份(12.8%)、溴化環氧(GX-153、大日本油墨化學工業公司製)30重量份(15.4%)、磷酸三苯酯(TPP、大八化學公司製)20重量份(10.3%)、和羥甲基化三聚氰胺樹脂(Phenolite TD-2538、大日本油墨化學工業公司製)20重量份(10.3%)，取得含浸用之樹脂塗佈液。
(積層板之製造)
其次使上述之含浸用樹脂塗佈液，以樹脂含浸率55%(相對於預浸漬物全體之比例)般含浸於紙基材及玻璃織布，取得預浸漬物。將紙基材預浸漬物重疊6片，於此核心材的上面和下面各重疊1片玻璃織布預浸漬物，再於其兩外面重疊附有接黏劑的銅箔(FGM日本電解公司製)，於150℃、10MPa、120分鐘加熱加壓成形，取得厚度1.6mm的積層板。
(實施例2)
除了使玻璃織布含浸之第二酚樹脂塗佈液的配合量如下以外，同實施例1處理。
配合上述之未改質甲酚型酚樹脂清漆75重量份(固形分基準為18.1%)、油改質甲酚型酚樹脂清漆150重量份(36.1%)、酚醛清漆型酚樹脂清漆50重量份(12.0%)、溴化環氧(GX-153大日本油墨化學工業公司製)30重量份(14.5%)、磷酸三苯酯(TPP、大八化學公司製)20重量份(9.6%)、和羥甲基化三聚氰胺樹脂(Phenolite TD-2538、大日本油墨化學工業公司製)20重量份(9.6%)，取得第二酚樹脂塗佈液。
(實施例3)
除了使用玻璃不織布作為玻璃纖維基材以外，同實施例1處理。
(比較例1)
除了使用如下調製之環氧樹脂塗佈液，代替基材中含浸之第一及第二酚樹脂塗佈液，並且使用不含有接黏劑的銅箔以外，同實施例1處理。
配合上述之酚醛清漆型酚樹脂清漆20重量份(固形分基準為15.9%)、溴化環氧(GX-153大日本油墨化學工業公司製)100重量份(79.4%)、磷酸三苯酯(TPP、大八化學公司製)5重量份(4.0%)、和咪唑(2P4MZ、四國化成公司製)1重量份(0.8%)，並再配合50重量份氫氧化鋁，取得第一及第二環氧樹脂塗佈液。
(比較例2)
除了使用如下調製之環氧樹脂塗佈液，代替基材中含浸之第一及第二酚樹脂塗佈液，重疊4片紙基材預浸漬物作為核心材，並於其上面和下面，各重疊2片玻璃纖維基材預浸漬物，且使用不含有接黏劑之銅箔以外，同實施例1處理。
配合上述之酚醛清漆型酚樹脂清漆20重量份(15.9%)、溴化環氧(GX-153大日本油墨化學工業公司製)100重量份(79.4%)、磷酸三苯酯(TPP、大八化學公司製)5重量份(4.0%)、和咪唑(2P4MZ、四國化成公司製)1重量份(0.8%)，並再配合50重量份氫氧化鋁，取得第一及第二環氧樹脂塗佈液。
(比較例3)
除了使用如下調製之環氧樹脂塗佈液，代替基材中含浸之第一及第二酚樹脂塗佈液以外，同實施例1處理。
配合上述之酚醛清漆型酚樹脂清漆20重量份(15.9%)、溴化環氧(GX-153大日本油墨化學工業公司製)100重量份(79.4%)、磷酸三苯酯(TPP、大八化學公司製)5重量份(4.0%)、和咪唑(2P4MZ、四國化成公司製)1重量份(0.8%)，並再配合50重量份氫氧化鋁，取得第一及第二環氧樹脂塗佈液。
(比較例4)
除了使用如下調製之環氧樹脂塗佈液，代替玻璃纖維基材中含浸之第二酚樹脂塗佈液，並且使用不含有接黏劑的銅箔以外，同實施例1處理。
配合上述之酚醛清漆型酚樹脂清漆20重量份(15.9%)、溴化環氧(GX-153大日本油墨化學工業公司製)100重量份(79.4%)、磷酸三苯酯(TPP、大八化學公司製)5重量份(4.0%)、和咪唑(2P4MZ、四國化成公司製)1重量份(0.8%)，並再配合50重量份氫氧化鋁，取得第二環氧樹脂塗佈液。
(比較例5)
除了使用如下調製之環氧樹脂塗佈液，代替紙基材中含浸之第一酚樹脂塗佈液，並且使用不含有接黏劑的銅箔以外，同實施例1處理。
配合上述之酚醛清漆型酚樹脂清漆20重量份(15.9%)、溴化環氧(GX-153大日本油墨化學工業公司製)100重量份(79.4%)、磷酸三苯酯(TPP、大八化學公司製)5重量份(4.0%)、和咪唑(2P4MZ、四國化成公司製)1重量份(0.8%)，並再配合50重量份氫氧化鋁，取得第一環氧樹脂塗佈液。
(比較例6)
除了全部使用紙基材以外，同實施例1處理。
(比較例7)
除了全部使用紙基材，並且使用不含有接黏劑的銅箔以外，同比較例3處理。
評估根據上述實施例及比較例所得之積層板的各特性。各特性係以下列方法評估。所得之結果示於表1。
(1)　彎曲強度
彎曲強度係根據JIS C6481評估。
(2)　吸水率
吸水率係根據JIS C6481評估。
(3)　長期吸濕性
樣品為根據JIS C6481之吸水率測定並以形狀調整。切出50×50mm正方之樣品，除去全部銅箔。作為前處理，以50℃處理24小時者視為初期重量。於60℃/90%之恆溫恆濕槽中放置1000小時，取出樣品後於20℃/65%之環境下放置30分鐘，其後於30分鐘以內測定重量，並由重量變化算出吸濕率。
(4)　銀漿料直通孔間絕緣性
銅箔刃徑Φ 0.75mm，使用Φ 0.5mm之鑽孔機，以直通孔間距為1.5mm般進行鑽孔加工。直通孔中將銀漿料印刷、硬化且採取上下面導通，作成銀漿料直通孔間的絕緣性試驗印刷板。
對此基板加以50V的電壓，並於40℃/90%之恆溫恆濕槽中放置1000小時後，取出且加以100V之電壓，測定直通孔間的絕緣電阻值。
(5)　耐漏流性
耐漏流性為依據UL-1410評估。
(6)　銅箔電路間的耐漏流性
作成電路寬1mm、電路長30mm、電路間隙1mm的銅箔電路，並依據UL-1410評估。
如表所闡明般，實施例1~3為彎曲強度、吸水率、長期吸濕率、電性絕緣性、及銅箔電路間的耐漏流性優良。
彎曲強度、吸水率，由實施例1~3與比較例6、7之對比，於使用紙基材預浸漬物之核心材兩面，經由重疊使用玻璃纖維基材預浸漬物之外側部分而表現。
長期耐濕性、電性絕緣性，由實施例1~3與比較例1~3、5、7之對比，經由紙基材中含浸酚樹脂液而表現。
又，銅箔電路間之耐漏流性，由實施例1~3與比較例1~4、7之對比，經由外側部分之玻璃纖維基材中含浸酚樹脂液以及使用附有接黏劑之銅箔而表現。
由上述，兼具彎曲強度、吸水率、長期吸濕率、電性絕緣性、及銅箔電路間之耐漏流性的印刷電路用積層板，在使用紙基材中含浸酚樹脂塗佈液之紙基材預浸漬物的核心材的上面及下面，將玻璃纖維基材中含浸酚樹脂塗佈液之玻璃纖維基材預浸漬物重疊，更且，於至少單面將積層金屬箔的積層體予以加熱加壓而得之同時，較佳，使用附有接黏劑之金屬箔，取得其接黏劑面與上述玻璃纖維基材預浸漬面以相對向般配置的金屬覆蓋之酚樹脂積層板。

Claims (6)

  1. 一種金屬覆蓋之酚樹脂積層板，其特徵為：在僅使用1片或重疊指定片數之於紙基材中含浸第一酚樹脂組成物之紙基材預浸漬物的中心層狀部的上面側及下面側，將僅使用1片或重疊指定片數之於玻璃纖維基材中含浸第二酚樹脂組成物之玻璃纖維基材預浸漬物的外側層狀部予以積層，更且，將上述上面側及下面側之外側層狀部中之至少單側上積層有金屬箔的積層體予以加熱加壓而得；上述第一酚樹脂組成物及第二酚樹脂組成物分別含有未改質甲酚型酚樹脂、酚醛清漆型酚樹脂及油改質甲酚型酚樹脂；含有上述未改質甲酚型酚樹脂及上述油改質甲酚型酚樹脂之甲酚型酚樹脂的合計含有量為酚樹脂組成物全體(固形分基準)的20重量%~80重量%；上述酚醛清漆型酚樹脂的含有量為酚樹脂組成物全體(固形分基準)的3~30重量%；上述油改質甲酚型酚樹脂的含有量為酚樹脂組成物全體(固形分基準)的5~50重量%。
  2. 如申請專利範圍第1項之金屬覆蓋之酚樹脂積層板，其中，上述積層體之金屬箔為附有接黏劑的金屬箔，並使上述接黏劑面與上述玻璃纖維基材預浸漬面以相對向之方式配置。
  3. 如申請專利範圍第1項之金屬覆蓋之酚樹脂積層板，其中，上述玻璃纖維基材為玻璃織布。
  4. 如申請專利範圍第1項之金屬覆蓋之酚樹脂積層板，其中，構成上述第一酚樹脂塗佈液的樹脂組成物、與構成上述第二酚樹脂塗佈液的樹脂組成物，係為相同的樹脂組成物。
  5. 如申請專利範圍第1項之金屬覆蓋之酚樹脂積層板，其中，於60℃、相對濕度90%之環境下放置1000小時後之長期吸濕率為2重量%以下。
  6. 如申請專利範圍第1項之金屬覆蓋之酚樹脂積層板，其中，上述樹脂組成物進一步含有酚樹脂組成物全體(固形分基準)的5~30重量%之難燃性化合物。
TW98133532A 2008-10-03 2009-10-02 金屬覆蓋之酚樹脂積層板 TWI458627B (zh)

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