JP7531099B2 - 絶縁フィルム、金属張積層部材及び再配線層 - Google Patents
絶縁フィルム、金属張積層部材及び再配線層 Download PDFInfo
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- JP7531099B2 JP7531099B2 JP2020078600A JP2020078600A JP7531099B2 JP 7531099 B2 JP7531099 B2 JP 7531099B2 JP 2020078600 A JP2020078600 A JP 2020078600A JP 2020078600 A JP2020078600 A JP 2020078600A JP 7531099 B2 JP7531099 B2 JP 7531099B2
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- B32B15/098—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising condensation resins of aldehydes, e.g. with phenols, ureas or melamines
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- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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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
- C08G59/40—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
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/12—Mountings, e.g. non-detachable insulating substrates
- H01L23/14—Mountings, e.g. non-detachable insulating substrates characterised by the material or its electrical properties
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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- H05K1/0353—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement
- H05K1/0373—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement containing additives, e.g. fillers
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/05—Insulated conductive substrates, e.g. insulated metal substrate
- H05K1/056—Insulated conductive substrates, e.g. insulated metal substrate the metal substrate being covered by an organic insulating layer
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- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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Description
本実施形態に係る絶縁フィルムは、樹脂組成物の半硬化物を備えている。樹脂組成物の半硬化物とは、硬化反応の中間段階にある樹脂組成物を意味する。中間段階とは、Bステージとも呼ばれ、ワニス状態のAステージと、完全に硬化した状態のCステージとの間の段階である。この段階で、さらに加熱すると一度溶融した後、完全硬化し、樹脂組成物の硬化物となる。本実施形態に係る絶縁フィルムは、半硬化状態の樹脂組成物で構成することができる。また絶縁フィルムの硬化物は、絶縁フィルムを構成する樹脂組成物が完全硬化状態であることを意味する。
WC:単分子層の形成に必要なシランカップリング剤の量(g)
WF:無機充填材の添加量(g)
SF:無機充填材の比表面積(m2/g)
SC:シランカップリング剤の最小被覆面積(m2/g)
好ましくは、(C1)成分又は(C2)成分は、平均粒子径が500nm以下のナノフィラーである。より好ましくは、(C1)成分又は(C2)成分は、平均粒子径が10nm以上500nm以下のナノフィラーである。(C1)成分又は(C2)成分のいずれかの平均粒子径が500nm以下であれば、デスミア処理における樹脂スミアの除去効果を向上させることができる。この点についてより詳しく説明する。樹脂スミアの主成分は、高分子量体の(B)成分であると考えられる。そして、第一の場合として、(C1)成分又は(C2)成分のいずれかが上記のナノフィラーである場合には、このナノフィラーが樹脂スミアの中に均一に分散することとなる。このような樹脂スミアは、デスミア処理によって容易に除去することができる。第二の場合として、(C1)成分及び(C2)成分がいずれも上記のナノフィラーでない場合には、樹脂スミアが、ほぼ樹脂成分のみで構成されてしまう。このような樹脂スミアは、第一の場合よりもデスミア処理の条件を激しくすれば除去し得るが、第一の場合と同じ条件のデスミア処理では除去しにくくなる。すなわち、デスミア処理の条件が同じであれば、(C1)成分及び(C2)成分の両方の平均粒子径が500nmを超える場合に比べて、(C1)成分又は(C2)成分のいずれかの平均粒子径が500nm以下である場合の方が、樹脂スミアを容易に除去することができる。この理由は、上述のように平均粒子径が500nm以下のナノフィラーが樹脂スミア内で均一に分散しているからであると考えられる。(C1)成分又は(C2)成分のいずれかの平均粒子径が10nm以上であれば、ワニス状態の樹脂組成物の増粘を抑制することができる。なお、以下において、単にナノフィラーといえば、平均粒子径が500nm以下の第1充填材又は第2充填材を意味する。
本実施形態に係る金属張積層部材2は、図1に示すように、絶縁フィルム1の半硬化物11と、この半硬化物11に接着されている金属箔3と、を備えている。すなわち、金属張積層部材2は、樹脂付き金属箔又は金属箔付き樹脂フィルムとして形成されている。例えば、半硬化状態の樹脂組成物で絶縁フィルム1が形成されている場合は、絶縁フィルム1の表面に金属箔3が接着されている。この場合、1枚の絶縁フィルム1の片面又は両面に金属箔3が接着されている。金属箔3としては、例えば、銅箔を挙げることができる。
本実施形態に係る再配線層100は、絶縁フィルム1の硬化物12と、この硬化物12に設けられた導体パターン105と、を備えている。再配線層100は、硬化物12を電気的な絶縁性を有する絶縁層として有している。また再配線層100は、導体パターン105を再配線として有している。本開示において、再配線とは、LSIチップなどの電子部品の信号をマザーボードなどの基板に送るために、電子部品の表面に形成される外部電極から基板につなぐ導体の配線のことをいう。
(A1)成分
・ナフタレン骨格含有エポキシ樹脂(DIC株式会社製「HP-9500」)
(A2)成分
・ナフタレン骨格含有フェノール樹脂(DIC株式会社製「HPC-9500P」)
(B)成分
・エポキシ変性アクリル樹脂(ナガセケムテックス株式会社製「PMS-12-82」)
これは、式(b1)、式(b2)及び式(b3)で表される構造を有し、隣り合う炭素原子間に不飽和結合を有さず、重量平均分子量が50万、エポキシ価が0.21eq/kgである。
(C1)成分
・イソシアネートシラン処理シリカ
これは、3-イソシアネートプロピルトリエトキシシランで表面処理された球状シリカ(株式会社アドマテックス製「SC2500GNO」)であり、平均粒子径は0.5μm(500nm)である。
(C2)成分
・メタクリルシラン処理シリカ
これは、3-メタクリロキシプロピルトリメトキシシランで表面処理された球状シリカ(株式会社アドマテックス製「YA050C-MJE」)であり、平均粒子径は50nmである。
(溶剤)
・メチルエチルケトン
(添加剤)
・リン系難燃剤(大塚化学株式会社製「SPB-100」)
表1に示す配合量(質量部)で、溶剤に(A1)成分、(A2)成分、(B)成分を加えて溶解させた後、さらに添加剤を加えて配合し、次に(C1)成分、(C2)成分を加えて分散させることによって樹脂組成物のワニスを調製した。実施例1、2及び比較例では(A1)成分及び(A2)成分と(B)成分とは相溶しないで相分離している。
実施例1、2及び比較例について、レーザーテック株式会社製の型番mc2000を用いて、厚み、表面粗さRa及び表面粗さRzを測定した。
11 半硬化物
12 硬化物
2 金属張積層部材
100 再配線層
Claims (13)
- 樹脂組成物の半硬化物を備えた絶縁フィルムであって、
前記樹脂組成物は、(A1)成分及び(A2)成分のうちの少なくともいずれかの成分と、(B)成分と、(C1)成分と、(C2)成分と、を含有し、
前記(A1)成分は、ナフタレン骨格及びビフェニル骨格のうちの少なくともいずれかの骨格を有するエポキシ樹脂を含み、
前記(A2)成分は、ナフタレン骨格及びビフェニル骨格のうちの少なくともいずれかの骨格を有するフェノール樹脂を含み、
前記(B)成分は、下記式(b1)、下記式(b2)及び下記式(b3)のうちの少なくとも下記式(b2)及び下記式(b3)で表される構造を有し、重量平均分子量が20万~85万である高分子量体を含み、
前記(C1)成分は、下記式(c1)で表される第1シランカップリング剤で第1無機充填材を表面処理して得られた第1充填材を含み、
前記(C2)成分は、下記式(c2)で表される第2シランカップリング剤で第2無機充填材を表面処理して得られた第2充填材を含み、
前記第1無機充填材及び前記第2無機充填材は、最大粒子径が5μm以下の無機充填材であり、
厚みが、0.1μm以上10μm以下の範囲内である、
絶縁フィルム。
- 前記(C1)成分又は前記(C2)成分は、平均粒子径が500nm以下のナノフィラーである、
請求項1に記載の絶縁フィルム。 - 前記(A1)成分、前記(A2)成分及び前記(B)成分の合計100質量部に対して、前記ナノフィラーは、1~30質量部の範囲内である、
請求項2に記載の絶縁フィルム。 - 前記(A1)成分及び前記(A2)成分の合計と、前記(B)成分との質量比は、90:10~50:50である、
請求項1~3のいずれか1項に記載の絶縁フィルム。 - 前記(C1)成分及び前記(C2)成分の合計の含有量は、前記樹脂組成物の全量に対して80質量%以下である、
請求項1~4のいずれか1項に記載の絶縁フィルム。 - 前記(C1)成分と前記(C2)成分の質量比は、100:0~60:40である、
請求項1~5のいずれか1項に記載の絶縁フィルム。 - 前記(A1)成分及び前記(A2)成分と前記(B)成分とは、相溶しないで相分離している、
請求項1~6のいずれか1項に記載の絶縁フィルム。 - 前記(B)成分のエポキシ価は、0.01~0.80eq/kgの範囲内である、
請求項1~7のいずれか1項に記載の絶縁フィルム。 - 前記(B)成分は、隣り合う炭素原子間に不飽和結合を有しない、
請求項1~8のいずれか1項に記載の絶縁フィルム。 - 前記樹脂組成物は、更に、リン系難燃剤を含有する、
請求項1~9のいずれか1項に記載の絶縁フィルム。 - 硬化状態において、損失弾性率と貯蔵弾性率の比は100℃以下の温度域と200℃以上の温度域とにおいて0.05以上である、
請求項1~10のいずれか1項に記載の絶縁フィルム。 - 請求項1~11のいずれか1項に記載の絶縁フィルムの半硬化物と、
前記半硬化物に接着されている金属箔と、を備えている、
金属張積層部材。 - 請求項1~11のいずれか1項に記載の絶縁フィルムの硬化物と、
前記硬化物に設けられた導体パターンと、を備えている、
再配線層。
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US17/921,263 US20230174772A1 (en) | 2020-04-27 | 2021-03-25 | Insulating film, metal-clad laminate member, and rewiring layer |
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