JP2022033061A - ミクロ粗面化電着銅箔及び銅張積層板 - Google Patents
ミクロ粗面化電着銅箔及び銅張積層板 Download PDFInfo
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- JP2022033061A JP2022033061A JP2021177752A JP2021177752A JP2022033061A JP 2022033061 A JP2022033061 A JP 2022033061A JP 2021177752 A JP2021177752 A JP 2021177752A JP 2021177752 A JP2021177752 A JP 2021177752A JP 2022033061 A JP2022033061 A JP 2022033061A
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- copper
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- copper foil
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- clad laminate
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 286
- 239000011889 copper foil Substances 0.000 title claims abstract description 123
- 239000010949 copper Substances 0.000 title abstract description 164
- 229910052802 copper Inorganic materials 0.000 title abstract description 163
- 238000003780 insertion Methods 0.000 claims abstract description 45
- 230000037431 insertion Effects 0.000 claims abstract description 45
- 239000000758 substrate Substances 0.000 claims description 33
- 238000012360 testing method Methods 0.000 description 30
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- 229920005989 resin Polymers 0.000 description 24
- 238000001878 scanning electron micrograph Methods 0.000 description 22
- 238000011282 treatment Methods 0.000 description 14
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- 238000000034 method Methods 0.000 description 9
- 239000006087 Silane Coupling Agent Substances 0.000 description 8
- 238000009713 electroplating Methods 0.000 description 8
- 230000001737 promoting effect Effects 0.000 description 8
- 239000000243 solution Substances 0.000 description 6
- 238000004381 surface treatment Methods 0.000 description 6
- 229910021654 trace metal Inorganic materials 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 239000011888 foil Substances 0.000 description 4
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- 230000000694 effects Effects 0.000 description 3
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- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
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- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 1
- XQUPVDVFXZDTLT-UHFFFAOYSA-N 1-[4-[[4-(2,5-dioxopyrrol-1-yl)phenyl]methyl]phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C(C=C1)=CC=C1CC1=CC=C(N2C(C=CC2=O)=O)C=C1 XQUPVDVFXZDTLT-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- 241001124569 Lycaenidae Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
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- 235000014987 copper Nutrition 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 239000004643 cyanate ester Substances 0.000 description 1
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- 210000004195 gingiva Anatomy 0.000 description 1
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- 229910021645 metal ion Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920003192 poly(bis maleimide) Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 229920001955 polyphenylene ether Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 1
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- H05K3/38—Improvement of the adhesion between the insulating substrate and the metal
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Abstract
Description
初めに、1リットル当たり約65グラム(g/L)~100g/Lの銅イオン(Cu2+)、約85g/L~105g/Lの硫酸(H2SO4)、1.0ppm~30ppmの塩化物イオン(Cl-)から成る銅電解液を調製し、得られた銅電解液を、回転陰極ロール及び不溶性陽極を備えた未加工の箔電解装置に導入し、30アンペア/平方デシメートル(A/dm2)~60A/dm2の電流密度の電流を陰極ロール及び不溶性陽極に印加し、液温50℃~58℃で超ロープロファイル(VLP)の未加工の箔を作製し、このVLP未加工箔をガイドロールに連続的に巻きつけた。
微量金属濃度、処理溶液の液温及びpH値、及びシラン化処理タンクでの処理時間を含むシラン化のパラメータも表1に示した。電気めっき溶液中に存在する微量金属はNi+2、Pd+2、Ag+、又はW+6の形態であってもよい。第1(1番目)~第7(7番目)、第9(9番目)及び第10(10番目)タンクでは、微量金属はNi+2、Pd+2、Ag+、又はW+6であってもよく、第8(8番目)タンクでは、微量金属はPd+2、Ag+、又はW+6であってもよく、第9(9番目)タンクでは、微量金属はPd+2、Ag+、又はW+6であってもよい。
比較例は、古河電機工業社製、製造番号FT1-UPの超ロープロファイル銅箔であり、重量1オンス(oz)、厚さ約35μmの市販銅箔であった。
本試験例では、実施例1、2、及び3のミクロ粗面化電着銅箔、並びに比較例の市販銅箔を試験片とし、各試験片の表面形状を、傾斜角度35°、倍率5,000倍又は10,000倍の走査型電子顕微鏡(S-3400N、日立ハイテク社製)を用いて観察した。
上記10個の銅ノジュール配置領域の個々の長さを測定し、平均化し、実施例1の複数の銅ノジュール配置領域の平均長を求めた。上記10個の銅ノジュール配置領域の銅ノジュールの個々の数を測定し、平均化し、実施例1の複数の銅ノジュールの平均数を求めた。また、上記10個の銅ノジュール配置領域の銅ノジュールの平均幅を測定し、平均化し、実施例1の複数の銅ノジュールの平均幅の平均を求めた。また、その算出結果を表3に収載した。
本試験例では、実施例1、2、及び3のミクロ粗面化電着銅箔及び比較例の市販銅箔を試験片とし、各試験片上の無作為に選択した5点のSdr値を、倍率50倍(X50)の対物レンズ、0.2mmのL‐フィルタ(λc)、及び2μmのS‐フィルタ(λs)を備えた非接触走査型レーザ顕微鏡(コントローラVK‐X150K及び測定ヘッドVK‐X160Kを装備、キーエンス社製)を用いて、ISO25178‐2012法に従って測定し、得られた値を平均化し、平均Sdrを求めた。
本試験例では、以下の方法により2種類の試験片を調製した。
初めに、シラン化の第11(11番目)表面処理に供していない(即ち、シランカップリング剤が塗布されていない)実施例1、2、及び3のミクロ粗面化電着銅箔の各2片を、それぞれのミクロ粗面においてMEGTRON7基板の両面に接着し、MEGTRON7の指示書に従って積層し、実施例1A、2A、及び3Aの銅張積層板を得た。実施例1A、2A、及び3Aの銅張積層板を、シランカップリング剤を塗布していない銅張積層板の剥離強度を試験するための試験片として使用した。
実施例1、2、及び3のいずれかのミクロ粗面化電着銅箔及び比較例の市販銅箔、並びにプリプレグ(製番EM890、Elite Material社製)を用いて、図5に示すDelta Lの8層積層体を調製した。積層体を調製し、INTEL社が提供するDelta L方法論に従って挿入損失を試験した。テストクーポンの調製及び試験方法は、Delta L方法論の基準を満たしていた。例えば、実施例1C、2C、及び3C、並びに比較例Cの銅張積層板を挿入損失試験用のテストクーポンとして用いた。全テストクーポンの特性インピーダンスが85Ω±10%となる条件で、ネットワーク分析装置を用いて、各テストクーポンのL6銅箔の、4GHz、8GHz、12.89GHz、16GHzでの挿入損失を測定した。結果を以下の表7に収載した。
以上の実験結果から、明らかに、実施例1~3のミクロ粗面化電着銅箔の表面形状(即ち、特定のサイズ及び構造的特徴を有する複数の銅ノジュール非配置領域及び複数の銅ノジュール配置領域)、並びに/又は表面特性(即ち、特定の範囲のRlr値及び/又はSdr値)を制御することで、銅ノジュール非配置領域(歯肉に類似した構造を有する)内の電子経路距離を短縮し、高周波伝送での銅張積層板の挿入損失を減少できた。また、当該制御により、銅ノジュール配置領域(歯に類似させて設計した構造を有する)が、本発明のミクロ粗面化電着銅箔と樹脂基板との剥離強度を促進する上で有利になった。
従って、銅箔と樹脂基板との所望の剥離強度が維持されることを前提に、実施例1~3のいずれかのミクロ粗面化電着銅箔から成る銅張積層板は高周波数(4GHz、8GHz、12.89GHz、16GHz)での銅張積層板の挿入損失を総合的に抑制又は低減し、それにより高周波伝送効率を促進できた。また、シランカップリング剤を塗布していない場合、本発明は、所望の剥離強度を付与し、銅張積層板から成る関連製品の効果及び品質を促進できた。
Claims (9)
- ミクロ粗面から成るミクロ粗面化電着銅箔であって、
前記ミクロ粗面のRlr値は1.05~1.60であることを特徴とする、
ミクロ粗面化電着銅箔。 - 前記ミクロ粗面のSdr値は0.01~0.08である、請求項1に記載の前記ミクロ粗面化電着銅箔。
- 前記ミクロ粗面のRlr値は1.10~1.30であり、前記Sdr値は0.010~0.023である、請求項1又は2に記載の前記ミクロ粗面化電着銅箔。
- ミクロ粗面から成るミクロ粗面化電着銅箔であって、前記ミクロ粗面のSdr値は0.01~0.08であることを特徴とするミクロ粗面化電着銅箔。
- 請求項1~4のいずれか一項に記載の前記ミクロ粗面化電着銅箔及び基板から成る銅張積層板であって、
前記基板及び前記ミクロ粗面化電着銅箔は積層することを特徴とする、
銅張積層板。 - 前記銅張積層板の4GHzでの挿入損失は-0.26dB/in~-0.32dB/inである、請求項5に記載の前記銅張積層板。
- 前記銅張積層板の8GHzでの挿入損失は-0.41dB/in~-0.51dB/inである、請求項5又は6に記載の前記銅張積層板。
- 前記銅張積層板の12.89GHzでの挿入損失は-0.57dB/in~-0.73dB/inである、請求項5~7のいずれか一項に記載の前記銅張積層板。
- 前記銅張積層板の16GHzでの挿入損失は-0.67dB/in~-0.83dB/inである、請求項5~8のいずれか一項に記載の前記銅張積層板。
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