JPWO2007099965A1 - 回路接続材料、これを用いた回路部材の接続構造及びその製造方法 - Google Patents
回路接続材料、これを用いた回路部材の接続構造及びその製造方法 Download PDFInfo
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Abstract
Description
図1は、本発明の回路部材の接続構造の一実施形態を示す断面図である。本実施形態の回路部材の接続構造10は、相互に対向する回路部材20(第一の回路部材)と回路部材30(第二の回路部材)とを備えており、回路部材20と回路部材30との間には、これらを接続する回路接続部60が設けられている。
次に、接続構造10の製造方法について、図面を用いて説明する。図2はフィルム状の回路接続材料の一実施形態を示す断面図である。フィルム状の回路接続材料61は、接着剤組成物41、被覆粒子50及び未被覆粒子53を含有している。
(1)未被覆粒子と被覆粒子の作製
平均粒径3.75μmの架橋ポリスチレン粒子(PSt)の表面に、無電解めっきで厚み0.2μmのニッケル層を作製した。さらに、そのニッケル層の外側に厚み0.04μmの金層をめっきにより形成し、導電性粒子51に相当するめっきプラスチック粒子(PSt−M)を得た。このめっきプラスチック粒子(PSt−M)を未被覆粒子として用いた。
ビスフェノールA型エポキシ樹脂と9、9’−ビス(4−ヒドロキシフェニル)フルオレンからガラス転移温度が80℃のフェノキシ樹脂を合成した。この樹脂50gを、質量比でトルエン/酢酸エチル=50/50の混合溶液に溶解して固形分40質量%のフェノキシ樹脂溶液を得た。
バンプ面積50μm×50μm、ピッチ100μm、高さ20μmの金バンプを配置したICチップと、厚み1.1mmのガラス上にインジウム−錫酸化物(ITO)の回路を蒸着により形成したITO基板(表面抵抗<20Ω/□)を準備した。
回路部材の接続構造の接続部の電気抵抗値を、4端子測定法を用いマルチメータで測定した。測定は、温度サイクル実施前と、温度サイクルを500回実施後の2回測定した。ここで、温度サイクルとは、「−40℃で30分間保持し、その後100℃で30分間保持」することを1サイクルとするものであり、回路部材の接続構造全体を温度サイクル槽中において実施するものである。
温度サイクル実施後の回路部材の接続構造の接続部に、直流(DC)50Vの電圧を1分間印加し、印加後の絶縁抵抗を、2端子測定法を用いてマルチメータで測定した。測定した測定値が1×103Ωを下回ったときをショート(短絡)発生と判定した。
未被覆粒子を1.2体積%、被覆粒子を10.8体積%の濃度となるように分散させて溶液Bを得たこと以外は、実施例1と同様にして、回路接続材料及び回路部材の接続構造の作製とこれらの評価を行った。
未被覆粒子を1.8体積%、被覆粒子を10.2体積%の濃度となるように分散させて溶液Bを得たこと以外は、実施例1と同様にして、回路接続材料及び回路部材の接続構造の作製とこれらの評価を行った。
未被覆粒子を2.4体積%、被覆粒子を9.6体積%の濃度となるように分散させて溶液Bを得たこと以外は、実施例1と同様にして、回路接続材料及び回路部材の接続構造の作製とこれらの評価を行った。
未被覆粒子を3.6体積%、被覆粒子を8.4体積%の濃度となるように分散させて溶液Bを得たこと以外は、実施例1と同様にして、回路接続材料及び回路部材の接続構造の作製とこれらの評価を行った。
未被覆粒子を4.8体積%、被覆粒子を7.2体積%の濃度となるように分散させて溶液Bを得たこと以外は、実施例1と同様にして、回路接続材料及び回路部材の接続構造の作製とこれらの評価を行った。
未被覆粒子を6.0体積%、被覆粒子を6.0体積%の濃度となるように分散させて溶液Bを得たこと以外は、実施例1と同様にして、回路接続材料及び回路部材の接続構造の作製とこれらの評価を行った。
未被覆粒子を7.2体積%、被覆粒子を4.8体積%の濃度となるように分散させて溶液Bを得たこと以外は、実施例1と同様にして、回路接続材料及び回路部材の接続構造の作製とこれらの評価を行った。
未被覆粒子を8.4体積%、被覆粒子を3.6体積%の濃度となるように分散させて溶液Bを得たこと以外は、実施例1と同様にして、回路接続材料及び回路部材の接続構造の作製とこれらの評価を行った。
未被覆粒子を9.6体積%、被覆粒子を2.4体積%の濃度となるように分散させて溶液Bを得たこと以外は、実施例1と同様にして、回路接続材料及び回路部材の接続構造の作製とこれらの評価を行った。
未被覆粒子を10.8体積%、被覆粒子を1.2体積%の濃度となるように分散させて溶液Bを得たこと以外は、実施例1と同様にして、回路接続材料及び回路部材の接続構造の作製とこれらの評価を行った。
被覆粒子を12.0体積%の濃度となるように分散させて溶液Bを得たこと以外は、実施例1と同様にして、回路接続材料及び回路部材の接続構造の作製とこれらの評価を行った。
未被覆粒子を12.0体積%の濃度となるように分散させて溶液Bを得たこと以外は、実施例1と同様にして、回路接続材料及び回路部材の接続構造の作製とこれらの評価を行った。
Claims (11)
- 第一の回路基板の主面上に複数の第一の回路電極が形成された第一の回路部材と、第二の回路基板の主面上に複数の第二の回路電極が形成された第二の回路部材とを、前記第一及び第二の回路電極を対向させた状態で接続するための回路接続材料であって、
接着剤組成物と、導電性粒子及びこれの表面の一部を被覆する絶縁性微粒子を有する被覆粒子と、表面のほぼ全体が前記接着剤組成物と接している導電性粒子からなる未被覆粒子と、を含有することを特徴とする回路接続材料。 - 前記導電性粒子が、有機高分子化合物からなる核体を有する請求項1に記載の回路接続材料。
- 前記被覆粒子と前記未被覆粒子の合計濃度が、回路接続材料全体の3〜15体積%である請求項1に記載の回路接続材料。
- 前記被覆粒子に対する前記未被覆粒子の比率が体積比で2.0以下である請求項1に記載の回路接続材料。
- 第一の回路基板の主面上に複数の第一の回路電極が形成された第一の回路部材と、第二の回路基板の主面上に複数の第二の回路電極が形成され、前記第二の回路電極が前記第一の回路電極と対向配置されるように配置された第二の回路部材と、前記第一の回路基板と前記第二の回路基板との間に設けられ、前記第一及び第二の回路電極が電気的に接続されるように前記第一の回路部材と前記第二の回路部材とを接続する回路接続部と、を備えた回路部材の接続構造であって、
前記回路接続部が、請求項1〜4のいずれか一項に記載の回路接続材料から構成されることを特徴とする回路部材の接続構造。 - 前記第一の回路部材または前記第二の回路部材において隣り合う前記回路電極間に50Vの直流電圧を印加した場合に、隣り合う前記回路電極間の抵抗値が103Ω以上である請求項5に記載の回路部材の接続構造。
- 前記第一の回路部材及び前記第二の回路部材の少なくとも一方が、ICチップである請求項5に記載の回路部材の接続構造。
- 前記第一の回路電極と前記第二の回路電極との間の抵抗値が20Ω以下である請求項5に記載の回路部材の接続構造。
- 前記第一の回路電極の前記第二の回路電極との対向面、及び前記第二の回路電極の前記第一の回路電極との対向面のうち少なくとも一方の表面が、金、銀、錫、白金族の金属及びインジウム錫酸化物からなる群より選ばれる少なくとも一種から構成されている請求項5に記載の回路部材の接続構造。
- 前記第一の回路部材の前記第二の回路部材との対向面、及び前記第二の回路部材の前記第一の回路部材との対向面のうち少なくとも一方の表面が、窒化シリコン、シリコーン化合物及びポリイミド樹脂からなる群より選ばれる少なくとも一種から構成されている請求項5に記載の回路部材の接続構造。
- 第一の回路基板の主面上に複数の第一の回路電極が形成された第一の回路部材と第二の回路基板の主面上に複数の第二の回路電極が形成された第二の回路部材とを、第一の回路電極及び第二の回路電極が対向配置されるように配置し、これらの間に請求項1〜4のいずれか一項に記載の回路接続材料を介在させた状態で全体を加熱及び加圧して、前記第一及び第二の回路電極が電気的に接続されるように前記第一の回路部材と前記第二の回路部材とを接続する工程を備えることを特徴とする回路部材の接続構造の製造方法。
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KR20110019392A (ko) * | 2008-07-01 | 2011-02-25 | 히다치 가세고교 가부시끼가이샤 | 회로 접속 재료 및 회로 접속 구조체 |
JP5375374B2 (ja) * | 2009-07-02 | 2013-12-25 | 日立化成株式会社 | 回路接続材料及び回路接続構造体 |
CN104877611B (zh) * | 2009-11-17 | 2020-04-10 | 日立化成株式会社 | 电路连接材料、使用其的连接结构体、临时压接方法以及应用 |
WO2016189829A1 (ja) * | 2015-05-28 | 2016-12-01 | タツタ電線株式会社 | 実装用導電性ペースト |
CN111902884B (zh) * | 2018-04-04 | 2023-03-14 | 积水化学工业株式会社 | 导电性粒子、其制造方法、导电材料及连接结构体 |
WO2019194133A1 (ja) * | 2018-04-04 | 2019-10-10 | 積水化学工業株式会社 | 絶縁性粒子付き導電性粒子、絶縁性粒子付き導電性粒子の製造方法、導電材料及び接続構造体 |
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