JP2006188761A - 伝導性金属めっきポリイミド基板及びその製造方法 - Google Patents
伝導性金属めっきポリイミド基板及びその製造方法 Download PDFInfo
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- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
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Abstract
【解決手段】本発明の伝導性金属めっきポリイミド基板の製造方法は、ポリイミド膜の表面をKOH、エチレングリコール及びKOHの混合溶液、または無水クロム酸及び硫酸の混合溶液によりエッチングする段階と、前記エッチングされたポリイミド膜の表面をカップリング剤によりカップリングする段階と、前記ポリイミド膜に触媒を吸着させる段階と、前記触媒が吸着されたポリイミド膜に電流を付加することなく、第1の伝導性金属膜を形成する第1のめっき段階と、前記第1のめっきされたポリイミド膜に電流を付加して第2の伝導性金属膜を形成する第2のめっき段階と、を含む。
Description
脱脂工程は、ポリイミドの製造または取り扱い中に生成された表面の不純物(汚れ、油脂分、人間の指紋など)を除去するための工程である。
脱脂工程により得られたポリイミドをエッチング溶液によりエッチングすることで、ポリイミド表面の改質処理を施す。
エッチング工程により得られた、表面改質の行われたポリイミド膜の表面を、前記エッチング溶液がアルカリ性であった場合には酸性の中和溶液を、前記エッチング溶液が酸性であった場合にはアルカリ性の中和溶液を用いて中和処理する。
中和工程において改質されたポリイミド膜を、カップリング剤溶液を用いてカップリング反応させる。
前記カップリング工程により得られるカップリングされたポリイミド膜を、常温下、酸性溶液に浸漬することにより、ポリイミド膜の表面の開裂個所に結合できずに残留しているカップリングイオンを除去する。この酸洗い工程が長い場合、あるいは、用いられる酸性溶液の酸度が高過ぎる場合には、結合中のカップリングイオンも除去することがあるため、反応条件を適宜に調節する。
前記カップリングされたポリイミド膜を触媒溶液に浸漬し、ポリイミド膜の表面に触媒としてパラジウムを吸着させる。
前記触媒入りポリイミド膜を下地めっき溶液に浸漬することにより、ポリイミド膜に下地めっきを施す。
下地めっき済みポリイミド膜をめっき溶液に浸漬し、電流を付加してめっき工程を行う。
本発明の実施例に従い得られたFCCLめっきの連続性を目視で観察し、FCCLのめっきの度合いを評価する。◎は、サンプルの表面が全体的に均一でかつきれいにめっきされた場合であり、○は、サンプルの表面が均一にめっきされた場合、△は、部分的に未めっきの個所が存在する場合、そして×は、未めっきの部分が多い場合を示す。
ポリイミドサンプルを約45〜50℃の温度下で、5MのKOH中に約5〜7分間浸漬することにより、エッチングした。
前記実施例1において、エッチング溶液として、エチレングリコール(20g/L)を5MのKOH溶液に混合して得られたエッチング溶液を用いた以外は、前記実施例1の方法と同様にしてFCCLサンプルを得た。
前記実施例1において、エッチング溶液として、無水クロム酸及び硫酸の混合溶液を用いた以外は、前記実施例1の方法と同様にしてFCCLサンプルを得た。
前記実施例1〜3において、硫酸銅下地めっき溶液を用いて銅により下地めっきを行う代わりに、硫酸ニッケル下地めっき溶液を用いてニッケルにより下地めっきを行った以外は、前記実施例1〜3の方法と同様にしてFCCLサンプルを得た。
前記実施例1において、エッチング溶液として水酸化ナトリウム(NaOH,200g/L)水溶液を用いた以外は、前記実施例1の方法と同様にしてFCCLサンプルを得た。
前記実施例3において、エッチング溶液としてフッ酸(HF;12ml/L)及び硝酸(HNO3;335ml/L)を混合して得られた溶液を用いた以外は、前記実施例3の方法と同様にしてFCCLサンプルを得た。
Claims (19)
- 伝導性金属めっきポリイミド基板において、
表面のイミド環がエッチングされて開裂されているポリイミド膜と、
前記ポリイミド膜に無電解めっきにより形成されている第1の伝導性金属薄膜と、
前記第1の伝導性金属薄膜上に電解めっきにより形成されている第2の伝導性金属薄膜とを含む伝導性金属薄膜を有する、前記伝導性金属めっきポリイミド基板。 - ポリイミド膜が、KOH、エチレングリコール及びKOHの混合溶液、または無水クロム酸及び硫酸の混合溶液によりエッチングされている請求項1記載の伝導性金属めっきポリイミド基板。
- 第1の伝導性金属薄膜は、金、ニッケル及び銅のうちいずれか一種以上を含む請求項1記載の伝導性金属めっきポリイミド基板。
- 第2の伝導性金属薄膜は、金及び銅のうちいずれか一種以上を含む請求項1記載の伝導性金属めっきポリイミド基板。
- 第1の伝導性金属薄膜がポリイミド膜上に全体に均一に形成され、その膜厚が0.2μm以下である請求項1または3記載の伝導性金属めっきポリイミド基板。
- 伝導性金属薄膜の膜厚が、0.5〜30μmである請求項1〜4のいずれかに記載の伝導性金属めっきポリイミド基板。
- 伝導性金属薄膜の膜厚が、約15〜20μmである請求項6記載の伝導性金属めっきポリイミド基板。
- 伝導性金属めっきポリイミド基板の製造方法において、
a)前記ポリイミド膜の表面をKOH、エチレングリコール及びKOHの混合溶液、または無水クロム酸及び硫酸の混合溶液によりエッチングする段階と、
b)前記エッチングされたポリイミド膜の表面をカップリング剤によりカップリングする段階と、
c)前記ポリイミド膜に触媒を吸着させる段階と、
d)前記触媒が吸着されたポリイミド膜に電流を付加することなく、第1の伝導性金属膜を形成する第1のめっき段階と、
e)前記第1のめっきされたポリイミド膜に電流を付加して第2の伝導性金属膜を形成する第2のめっき段階とを含む、伝導性金属めっきポリイミド基板の製造方法。 - 各段階のいずれかの段階において、ポリイミド膜の全体に超音波を用いて連続した反応を誘導する、請求項8記載の伝導性金属めっきポリイミド基板の製造方法。
- a)段階において、
ポリイミド膜を、KOH、エチレングリコール及びKOHの混合溶液、または無水クロム酸及び硫酸の混合溶液に、45〜50℃下で、5〜7分間浸漬する、請求項8記載の伝導性金属めっきポリイミド基板の製造方法。 - a)段階において、
ポリイミド膜の表面のイミド基が表面改質によりアミド基またはカルボキシル基に変換されている、請求項8記載の伝導性金属めっきポリイミド基板の製造方法。 - d)段階において、
用いられるめっき溶液が、EDTA水溶液、水酸化ナトリウム水溶液、ホルマリン水溶液及び硫酸銅水溶液を混合して得られた硫酸銅めっき溶液、または次亜リン酸ナトリウム、クエン酸ナトリウム、アンモニア及び硫酸ニッケル六水和物溶液を混合して得られた硫酸ニッケルめっき溶液である、請求項8記載の伝導性金属めっきポリイミド基板の製造方法。 - 硫酸銅めっき溶液を用いる場合、触媒入りポリイミド膜を硫酸銅めっき溶液に38〜42℃の温度下で、25〜30分間浸漬する、請求項12記載の伝導性金属めっきポリイミド基板の製造方法。
- 硫酸ニッケルめっき溶液を用いる場合、触媒入りポリイミド膜を硫酸ニッケルめっき溶液に35〜40℃の温度下で、2分間浸漬する、請求項12記載の伝導性金属めっきポリイミド基板の製造方法。
- 第1の伝導性金属薄膜が、金、ニッケルまたは銅により形成される、請求項8記載の伝導性金属めっきポリイミド基板の製造方法。
- 第2の伝導性金属薄膜が、金または銅により形成される、請求項8記載の伝導性金属めっきポリイミド基板の製造方法。
- 第1の伝導性金属薄膜が前記ポリイミド膜上に全体に均一に形成され、その形成膜厚が0.2μm以下である、請求項8〜16のいずれかに記載の伝導性金属めっきポリイミド基板の製造方法。
- 伝導性金属薄膜の形成膜厚が、0.5〜30μmである、請求項8〜16のいずれかに記載の伝導性金属めっきポリイミド基板の製造方法。
- 伝導性金属薄膜の形成膜厚が、約15〜20μmである、請求項18記載の伝導性金属めっきポリイミド基板の製造方法。
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TW200628032A (en) | 2006-08-01 |
US20060147744A1 (en) | 2006-07-06 |
TWI314845B (en) | 2009-09-11 |
KR100845534B1 (ko) | 2008-07-10 |
KR20060077798A (ko) | 2006-07-05 |
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