JP2023541506A - 銅結合のための導電性エポキシ樹脂組成物 - Google Patents
銅結合のための導電性エポキシ樹脂組成物 Download PDFInfo
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- JP2023541506A JP2023541506A JP2023501897A JP2023501897A JP2023541506A JP 2023541506 A JP2023541506 A JP 2023541506A JP 2023501897 A JP2023501897 A JP 2023501897A JP 2023501897 A JP2023501897 A JP 2023501897A JP 2023541506 A JP2023541506 A JP 2023541506A
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- epoxy resin
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- anhydride
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- MECNWXGGNCJFQJ-UHFFFAOYSA-N 3-piperidin-1-ylpropane-1,2-diol Chemical compound OCC(O)CN1CCCCC1 MECNWXGGNCJFQJ-UHFFFAOYSA-N 0.000 description 1
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- 125000000319 biphenyl-4-yl group Chemical group [H]C1=C([H])C([H])=C([H])C([H])=C1C1=C([H])C([H])=C([*])C([H])=C1[H] 0.000 description 1
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- 238000000151 deposition Methods 0.000 description 1
- XXJWXESWEXIICW-UHFFFAOYSA-N diethylene glycol monoethyl ether Chemical compound CCOCCOCCO XXJWXESWEXIICW-UHFFFAOYSA-N 0.000 description 1
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- JMOLZNNXZPAGBH-UHFFFAOYSA-N hexyldecanoic acid Chemical compound CCCCCCCCC(C(O)=O)CCCCCC JMOLZNNXZPAGBH-UHFFFAOYSA-N 0.000 description 1
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- 239000004849 latent hardener Substances 0.000 description 1
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 description 1
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- 239000000314 lubricant Substances 0.000 description 1
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- CERQOIWHTDAKMF-UHFFFAOYSA-M methacrylate group Chemical group C(C(=C)C)(=O)[O-] CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 1
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- 125000002950 monocyclic group Chemical group 0.000 description 1
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- FUZZWVXGSFPDMH-UHFFFAOYSA-N n-hexanoic acid Natural products CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- XRQKARZTFMEBBY-UHFFFAOYSA-N oxiran-2-ylmethyl benzoate Chemical compound C=1C=CC=CC=1C(=O)OCC1CO1 XRQKARZTFMEBBY-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
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- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
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- 150000003141 primary amines Chemical class 0.000 description 1
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- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 description 1
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- 125000005472 straight-chain saturated fatty acid group Chemical group 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- QZZGJDVWLFXDLK-UHFFFAOYSA-N tetracosanoic acid Chemical compound CCCCCCCCCCCCCCCCCCCCCCCC(O)=O QZZGJDVWLFXDLK-UHFFFAOYSA-N 0.000 description 1
- 238000001029 thermal curing Methods 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- DSROZUMNVRXZNO-UHFFFAOYSA-K tris[(1-naphthalen-1-yl-3-phenylnaphthalen-2-yl)oxy]alumane Chemical compound C=1C=CC=CC=1C=1C=C2C=CC=CC2=C(C=2C3=CC=CC=C3C=CC=2)C=1O[Al](OC=1C(=C2C=CC=CC2=CC=1C=1C=CC=CC=1)C=1C2=CC=CC=C2C=CC=1)OC(C(=C1C=CC=CC1=C1)C=2C3=CC=CC=C3C=CC=2)=C1C1=CC=CC=C1 DSROZUMNVRXZNO-UHFFFAOYSA-K 0.000 description 1
- 229960002703 undecylenic acid Drugs 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 125000005023 xylyl group Chemical group 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/14—Polycondensates modified by chemical after-treatment
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
- C08G59/22—Di-epoxy compounds
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- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
- C08G59/32—Epoxy compounds containing three or more epoxy groups
- C08G59/38—Epoxy compounds containing three or more epoxy groups together with di-epoxy compounds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/42—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof
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- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
- C09J9/02—Electrically-conducting adhesives
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- Conductive Materials (AREA)
Abstract
Description
(A)(A1)二価環内炭化水素基またはアリール基および任意にC1~C6アルキレン基によって、互いに結合された、少なくとも2つのグリシジルオキシ基含有芳香族基を有する、少なくとも1つのエポキシ樹脂;および(A2)組成物の総重量に基づいて0.2~5.0%の量で存在する、少なくとも1つのレゾルシノールジグリシジルエーテル樹脂を含む、少なくとも1つのエポキシ樹脂系;
(B)少なくとも1つの酸無水物硬化剤;
(C)任意に、少なくとも1つの溶媒;
(D)少なくとも1つの導電性フィラー;および
(E)任意に、少なくとも1つの触媒。
(A)(A1)二価環内炭化水素基またはアリール基および任意にC1~C6アルキレン基によって、互いに結合された、少なくとも2つのグリシジルオキシ基含有芳香族基を有する、少なくとも1つのエポキシ樹脂;および(A2)組成物の総重量に基づいて0.2~5.0%の量で存在する、少なくとも1つのレゾルシノールジグリシジルエーテル樹脂を含む、少なくとも1つのエポキシ樹脂系;
(B)少なくとも1つの酸無水物硬化剤;
(C)任意に、少なくとも1つの溶媒;
(D)少なくとも1つの導電性フィラー;および
(E)任意に、少なくとも1つの触媒。
本発明によれば、1つの注目すべき特徴は、導電性エポキシ樹脂組成物に含まれるエポキシ樹脂系(A)が、(A1)二価環内炭化水素基またはアリール基および任意にC1~C6アルキレン基によって、互いに結合された、少なくとも2つのグリシジルオキシ基含有芳香族基を有する、少なくとも1つのエポキシ樹脂;および(A2)組成物の総重量に基づいて0.2~5.0重量%の量で存在する、少なくとも1つのレゾルシノールジグリシジルエーテル樹脂を含むことであり、これは、高温での銅基材の結合における接着性を劇的に改善する。
本発明によれば、エポキシ樹脂(A1)は、二価環内炭化水素基またはアリール基および任意にC1~C6アルキレン基によって互いに結合された、少なくとも2つのグリシジルオキシ基含有芳香族基を有する。
この構造において、ジグリシジル基含有フェノール基は、オクタヒドロ-4,7-メタノ-インデン上に配置される任意の構造部位に結合され得る。
本発明によれば、特定量(すなわち、組成物の総重量に基づいて0.2~5.0重量%、好ましくは0.5~3.0重量%、より好ましくは0.75~2.25重量%)のレゾルシノールジグリシジルエーテル樹脂(A2)を、本発明において供されるエポキシ樹脂(A1)に添加することが、銅基材の結合における接着性を劇的に改善する。
本発明によれば、導電性エポキシ樹脂組成物は少なくとも1つの酸無水物硬化剤(B)を含む。酸無水物硬化剤(B)は、成分(A)を硬化できるものであれば特に限定されない。
好ましい実施形態において、導電性エポキシ樹脂組成物は、導電性エポキシ樹脂組成物の粘性を小さくするために、エポキシ樹脂系(A)および導電性フィラー(D)を分散させる少なくとも1つの溶媒(C)を含んでよい。
本発明の導電性エポキシ樹脂組成物は、銀、銅、窒化ホウ素、アルミナ、金、ニッケル、銀含有合金、銅含有合金、ニッケル含有合金、およびそれらの組み合わせから選択される少なくとも1つの導電性フィラーを含む。費用の観点から、本発明において銀、銅、窒化ホウ素またはアルミナが、導電性フィラーとして好ましくは使用される。
いくつかの実施形態において、触媒を添加して硬化プロセスを速めたり、熱潜在硬化の温度を下げたりしてよい。
1~15重量%、好ましくは3~10重量%の、二価環内炭化水素基またはアリール基および任意にC1~C6アルキレン基によって、互いに結合された、少なくとも2つのグリシジルオキシ基含有芳香族基を有する、少なくとも1つのエポキシ樹脂(A1)、
0.2~5.0重量%、好ましくは0.5~3重量%、より好ましくは0.75~2.25重量%の、少なくとも1つのレゾルシノールジグリシジルエーテル樹脂(A2)、
3重量%~15重量%、好ましくは3.5重量%~10重量%の少なくとも1つの酸無水物硬化剤(B);
0.5~20重量%、好ましくは1~10重量%の少なくとも1つの溶媒(C);
65重量%~95重量%、好ましくは70重量%~95重量%の少なくとも1つの導電性フィラー(D);および
0.1重量%~5重量%、好ましくは0.5~3重量%の少なくとも1つの触媒(E)。
他の一般的に使用される添加剤を本発明の導電性エポキシ樹脂組成物にさらに添加してよく、その例としては、強化剤、フラックス剤、過酸化物、フロー添加剤、接着促進剤、レオロジー調整剤、およびそれらの混合物が挙げられる。
本発明の導電性エポキシ樹脂組成物は、(A1)二価環内炭化水素基またはアリール基および任意にC1~C6アルキレン基によって、互いに結合された、少なくとも2つのグリシジルオキシ基含有芳香族基を有する、少なくとも1つのエポキシ樹脂;(A2)組成物の総重量に基づいて0.2~5.0重量%の量で存在する少なくとも1つのレゾルシノールジグリシジルエーテル樹脂;(B)少なくとも1つの酸無水物硬化剤;(C)任意に、少なくとも1つの溶媒;(D)少なくとも1つの導電性フィラー;(E)任意に、少なくとも1つの触媒;および存在する場合に他の添加剤を、室温で混合することによって製造することができる。該導電性エポキシ樹脂組成物の製造方法は、上記の成分が均一に混合された組成物が得られる限り、特に限定されない。
本発明の別の態様において、本発明の導電性エポキシ樹脂組成物の硬化物も提供される。
DDSAは、Milliken Chemicalsから入手可能な、いくつかの異性体アルケニルコハク酸無水物の液状混合物である。
以下の実施例において、組成物を以下のステップで調製した:
1.エポキシ樹脂(A1)およびRDGE(A2)(または、比較例ではRDGEと置き換えた他のエポキシ樹脂)、溶媒(C)(存在する場合)、および接着促進剤(存在する場合)を、まず60℃で1時間混合し、次いで、スピードミキサーを用いて室温で2000r/分で2分間さらに混合した;
2.次いで、触媒(E)(存在する場合)を添加し、スピードミキサーを用いて2000r/分で2分間混合した;
3.強化剤(存在する場合)を添加し、スピードミキサーを用いて2000r/分で2分間混合した;
4.酸無水物(B)を添加し、スピードミキサーを用いて2000r/分で2分間混合した;および
5.導電性フィラー(D)を添加し、スピードミキサーを用いて1000r/分で2分間混合し、次いで脱気した。
ダイシェア強度:
室温でのダイシェア強度(RTDSS)は、DAGE4000を用いて、25℃で測定した。組成物を2×2mm2ベアシリコンダイ上にコートし、半導体産業において用いられる商用タイプの銅リードフレーム(CDA151)に使用した。サンプルを、5℃/分で175℃まで、1時間で、N2雰囲気下で硬化した。圧力は使用しなかった。各サンプルを同じ条件下で8回試験し、エラーを除くために単純平均法により平均ダイシェア強度を算出し記録した。平均RTDSS目標は、10Kg/mm2以上であった。
この一連の実験例では、本発明によるRDGEを含む1つの導電性エポキシ樹脂組成物(実施例1)、および、RDGEを他のエポキシ樹脂で置き換えた16の組成物(比較例1~比較例16)を、以下の表で特定する重量パーセンテージに基づいて調製した。サンプルのRTDSSおよびHTDSSを試験した。
この一連の実験例では、本発明のエポキシ樹脂(A1)を用いる導電性エポキシ樹脂組成物(実施例2~実施例4)、および、他のエポキシ樹脂を用いる導電性エポキシ樹脂組成物(比較例17~比較例18)を、以下の表で特定する重量パーセンテージに基づいて調製した。サンプルのRTDSSおよびHTDSSを試験した。
この一連の実験例では、異なる含有量のRDGEを用いる本発明の導電性エポキシ樹脂組成物(実施例5~実施例8)を、以下の表で特定する重量パーセンテージに基づいて調製した。サンプルのRTDSSおよびHTDSSを試験した。
この一連の実験例では、異なる酸無水物硬化剤を用いる本発明の導電性エポキシ樹脂組成物(実施例9~実施例12)を、以下の表で特定する重量パーセンテージに基づいて調製した。サンプルのRTDSSおよびHTDSSを試験した。
Claims (15)
- (A)以下を含む少なくとも1つのエポキシ樹脂系:
(A1)二価環内炭化水素基またはアリール基および任意にC1~C6アルキレン基によって、互いに結合された、少なくとも2つのグリシジルオキシ基含有芳香族基を有する、少なくとも1つのエポキシ樹脂;および
(A2)組成物の総重量に基づいて0.2~5.0重量%の量で存在する、少なくとも1つのレゾルシノールジグリシジルエーテル樹脂;
(B)少なくとも1つの酸無水物硬化剤;
(C)任意に、少なくとも1つの溶媒;
(D)少なくとも1つの導電性フィラー;および
(E)任意に、少なくとも1つの触媒
を含む、導電性エポキシ樹脂組成物。 - グリシジルオキシ基含有芳香族基は、単官能グリシジルオキシ基含有フェノール、多官能グリシジルオキシ基含有フェノール、単官能グリシジルオキシ基含有ナフタレン基、多官能グリシジルオキシ基含有ナフタレン基、およびそれらの組合せから選択される、請求項1に記載の組成物。
- エポキシ樹脂(A1)は、グリシジルオキシ基含有ビフェニル型エポキシ樹脂、グリシジルオキシ基含有ナフタレン型エポキシ樹脂、二価環内炭化水素基を有するグリシジルオキシ基含有エポキシ樹脂、およびそれらの組合せから選択される、請求項1または2に記載の組成物。
- レゾルシノールジグリシジルエーテル樹脂(A2)は、組成物の総重量に基づいて、0.5~3.0重量%、好ましくは0.75~2.25重量%の量で存在する、請求項1~3のいずれかに記載の組成物。
- 酸無水物硬化剤(B)は、フタル酸無水物、マレイン酸無水物、トリメリット酸無水物、ピロメリット酸無水物、ヘキサヒドロフタル酸無水物、テトラヒドロフタル酸無水物、ナジックメチル酸無水物、ナジック酸無水物、グルタル酸無水物、メチルヘキサヒドロフタル酸無水物、メチルテトラヒドロフタル酸無水物、およびそれらの組合せから選択される、請求項1~4のいずれかに記載の組成物。
- 導電性フィラー(D)は、銀、銅、窒化ホウ素、アルミナ、金、ニッケル、銀含有合金、銅含有合金、ニッケル含有合金、およびそれらの組合せから選択される、好ましくは銀、銅、窒化ホウ素またはアルミナである、請求項1~5のいずれかに記載の組成物。
- 触媒(E)は、フェニル尿素、三塩化ホウ素アミン錯体、イミダゾール、脂肪族ビス尿素、フェノール、レゾルシノール、およびそれらの組合せから選択される、請求項1~6のいずれかに記載の組成物。
- 該組成物は、強化剤、フラックス剤、過酸化物、流動添加剤、接着促進剤、レオロジー改質剤、およびそれらの組合せから選択される添加剤をさらに含む、請求項1~7のいずれかに記載の組成物。
- 成分(A1)は、組成物の総重量に基づいて1~15重量%、好ましくは3~10重量%の量で存在する、請求項1~8のいずれかに記載の組成物。
- 成分(B)は、組成物の総重量に基づいて3重量%~15重量%、好ましくは3.5重量%~10重量%の量で存在する、請求項1~9のいずれかに記載の組成物。
- 成分(C)は、組成物の総重量に基づいて0.5~20重量%、好ましくは1~10重量%の量で存在する、請求項1~10のいずれかに記載の組成物。
- 成分(D)は、組成物の総重量に基づいて65重量%~95重量%、好ましくは70重量%~95重量%の量で存在する、請求項1~11のいずれかに記載の組成物。
- 請求項1~12のいずれかに記載の導電性エポキシ樹脂組成物の硬化物。
- 請求項13に記載の導電性エポキシ樹脂組成物の硬化物を含む半導体デバイス。
- 請求項1~12のいずれかに記載の導電性エポキシ樹脂組成物、および、請求項13に記載の導電性エポキシ樹脂組成物の硬化物の、半導体パッケージまたはマイクロ電子デバイスの製造における使用。
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