JP2016121329A - 加熱接合用シート、及び、ダイシングテープ付き加熱接合用シート - Google Patents
加熱接合用シート、及び、ダイシングテープ付き加熱接合用シート Download PDFInfo
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- JP2016121329A JP2016121329A JP2015204211A JP2015204211A JP2016121329A JP 2016121329 A JP2016121329 A JP 2016121329A JP 2015204211 A JP2015204211 A JP 2015204211A JP 2015204211 A JP2015204211 A JP 2015204211A JP 2016121329 A JP2016121329 A JP 2016121329A
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- heat bonding
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- dicing tape
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C—CHEMISTRY; METALLURGY
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
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- C09J133/08—Homopolymers or copolymers of acrylic acid esters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C—CHEMISTRY; METALLURGY
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/6835—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
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- C—CHEMISTRY; METALLURGY
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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Abstract
Description
下記引張試験方法により得られる引張弾性率が10〜3000MPaであり、
金属微粒子を60〜98重量%の範囲内で含み、
大気雰囲気下、昇温速度10℃/分の条件で、23℃から400℃まで昇温を行った後のエネルギー分散型X線分析により得られる炭素濃度が15重量%以下であることを特徴とする。
引張試験方法:
(1)試験試料として、厚さ200μm、幅10mm、長さ40mmの加熱接合用シートを準備し、
(2)チャック間距離10mm、引張速度50mm/分、23℃の条件で引張試験を行い、
(3)得られた応力−ひずみ線図の直線部分の傾きを引張弾性率とする。
また、金属微粒子を60〜98重量%の範囲内で含むため、金属微粒子を焼結、又は、溶融させて2つの物(例えば、半導体チップとリードフレーム)を接合させることができる。
また、大気雰囲気下、昇温速度10℃/分の条件で、23℃から400℃まで昇温を行った後のエネルギー分散型X線分析により得られる炭素濃度が15重量%以下であるため、400℃まで昇温を行った後は、有機物がほとんど存在しない。その結果、加熱接合工程後は、耐熱性に優れ、高温環境においても高い信頼性、熱特性が得られる。
ダイシングテープと、
前記ダイシングテープ上に積層された前記加熱接合用シートとを有することを特徴とする。
また、金属微粒子を焼結、又は、溶融させて2つの物(例えば、半導体チップとリードフレーム)を接合させることができる。
また、大気雰囲気下、昇温速度10℃/分の条件で、23℃から400℃まで昇温を行った後のエネルギー分散型X線分析により得られる炭素濃度が15重量%以下であるため、400℃まで昇温を行った後は、有機物がほとんど存在しない。その結果、加熱接合工程後は、耐熱性に優れ、高温環境においても高い信頼性、熱特性が得られる。
本発明の一実施形態に係る加熱接合用シート(以下、「加熱接合用シート」ともいう)、及び、ダイシングテープ付き加熱接合用シートについて、以下に説明する。本実施形態に係る加熱接合用シートは、以下に説明するダイシングテープ付き加熱接合用シートにおいて、ダイシングテープが貼り合わせられていない状態のものを挙げることができる。従って、以下では、ダイシングテープ付き加熱接合用シートについて説明し、加熱接合用シートについては、その中で説明することとする。図1は、本発明の一実施形態に係るダイシングテープ付き加熱接合用シートを示す断面模式図である。図2は、本発明の他の実施形態に係る他のダイシングテープ付き加熱接合用シートを示す断面模式図である。
加熱接合用シート3、3’は、下記引張試験方法により得られる引張弾性率が10MPa〜3000MPaであり、12MPa〜2900MPaであることが好ましく、15MPa〜2500MPaであることがより好ましい。
(1)試験試料として、厚さ200μm、幅10mm、長さ40mmの加熱接合用シート(引張試験用加熱接合用シート)を準備し、
(2)チャック間距離10mm、引張速度50mm/分、23℃の条件で引張試験を行い、
(3)得られた応力−ひずみ線図の直線部分の傾きを引張弾性率とする。
また、アクリル樹脂のなかでも、200℃〜400℃で熱分解するアクリル樹脂が好ましい。
前記脂肪族ポリカーボネートとしては、ポリエチレンカーボネート、ポリプロピレンカーボネート等が挙げられる。なかでもシート形成のためのワニス作製における有機溶剤への溶解性の観点から、ポリプロピレンカーボネートが好ましい。
前記芳香族ポリカーボネートとしては、主鎖にビスフェノールA構造を含むもの等が挙げられる。
前記ポリカーボネート樹脂の重量平均分子量は、10,000〜1,000,000の範囲内であることが好適である。なお、重量平均分子量は、GPC(ゲル・パーミエーション・クロマトグラフィー)により測定し、ポリスチレン換算により算出された値である。
ダイシングテープ11は基材1上に粘着剤層2を積層して構成されている。
まず、基材1は、従来公知の製膜方法により製膜することができる。当該製膜方法としては、例えばカレンダー製膜法、有機溶媒中でのキャスティング法、密閉系でのインフレーション押出法、Tダイ押出法、共押出し法、ドライラミネート法等が例示できる。
本実施形態に係る半導体装置の製造方法は、前記加熱接合用シートを準備する工程と、
前記加熱接合用シートを介して、半導体チップを被着体上に加熱接合する加熱接合工程とを含む(以下、第1実施形態ともいう)。
また、本実施形態に係る半導体装置の製造方法は、前記に記載のダイシングテープ付き加熱接合用シートを準備する工程と、
前記ダイシングテープ付き加熱接合用シートの加熱接合用シートと、半導体ウェハの裏面とを貼り合わせる貼り合わせ工程と、
前記半導体ウェハを前記加熱接合用シートと共にダイシングして、チップ状の半導体チップを形成するダイシング工程と、
前記半導体チップを、前記ダイシングテープ付き加熱接合用シートから前記加熱接合用シートと共にピックアップするピックアップ工程と、
前記加熱接合用シートを介して、前記半導体チップを被着体上に加熱接合する加熱接合工程とを含むものでもある(以下、第2実施形態ともいう)。
第1実施形態に係る半導体装置の製造方法は、第2の実施形態に係る半導体装置の製造方法が、ダイシングテープ付き加熱接合用シートを用いているのに対して、第1実施形態に係る半導体装置の製造方法では、加熱接合用シートを単体で用いている点で異なりその他の点で共通する。第1の実施形態に係る半導体装置の製造方法においては、加熱接合用シートを準備した後、これをダイシングテープと貼り合わせる工程を行なえば、その後は、第2実施形態に係る半導体装置の製造方法と同様とすることができる。そこで、以下では、第2実施形態に係る半導体装置の製造方法について説明することとする。
また、加熱接合用シート3は、金属微粒子を60〜98重量%の範囲内で含むため、金属微粒子を焼結、又は、溶融させて半導体チップ5と被着体6(例えば、リードフレーム))を接合させることができる。
また、加熱接合用シート3は、大気雰囲気下、昇温速度10℃/分の条件で、23℃から400℃まで昇温を行った後のエネルギー分散型X線分析により得られる炭素濃度が15重量%以下であるため、加熱接合工程後は、有機物がほとんど存在しない。その結果、加熱接合工程後は、耐熱性に優れ、高温環境においても高い信頼性、熱特性が得られる。
また、本発明の加熱接合用シート、及び、ダイシングテープ付き加熱接合用シートは、上記に例示した用途に限定されず、2つのものを加熱接合するのに利用することができる。
アクリル樹脂A:綜研化学社製のSPB−TE1(分子量40000)
アクリル樹脂B:綜研化学社製のIB−27(分子量370000)
ポリプロピレンカーボネート樹脂:Empower社製のQPAC40(分子量200000)
エチルセルロースA:日新化成社製のエトセルSTD100
金属微粒子A:三井金属鉱業社製のSPH02J(銀微粒子の凝集体、凝集体の平均粒径1.8μm、不定形)
金属微粒子混合ペーストA:応用ナノ粒子研究所製のANP−1(ナノサイズの銀微粒子が分散されたペースト)
有機溶剤A:メチルエチルケトン(MEK)
アルコール溶剤A:テルピネオール
表1に記載の配合比に従い、表1に記載の各成分及び溶媒を、ハイブリッドミキサー(キーエンス製 HM−500)の攪拌釜に入れ、攪拌モード、3分で攪拌・混合した。得られたワニスを、離型処理フィルム(三菱樹脂(株)製のMRA50)に塗布・乾燥(110℃、2分間)させた。これにより実施例、及び、比較例に係る厚み50μmの加熱接合シートを得た。ただし、比較例1は、均一なシートとすることができなかった。
(1)まず、実施例、比較例で得られた加熱接合用シートを厚み200μmとなるように重ねた。次に、幅10mm、長さ30mmに切り出した。
(2)次に、チャック間距離10mm、引張速度50mm/分、23℃の条件で引張試験を行った。この引張試験には、株式会社島津製作所のオートグラフAGS−Jを用いた。
(3)次に、得られた応力−ひずみ線図の応力0.5Nと1Nでの接線の傾きを引張弾性率とした。
結果を表1に示す。
実施例、比較例で得られた加熱接合用シートを大気雰囲気下、昇温速度10℃/分の条件で、23℃から400℃まで加温し、400℃に達した後は、自然放冷により常温にした。加温には、オーブンを用いた。次に、加熱後のサンプル(常温)を、EDX(エネルギー分散型X線分析)で元素分析(定量分析)し、炭素濃度(重量%)を測定した。測定には、アメテック株式会社製の製品名:EDAX Model PV77-50780MEを用いた。結果を表1に示す。
実施例、比較例で得られた加熱接合用シートに対して、大気雰囲気下、昇温速度10℃/分の条件で、23℃から500℃まで示差熱分析を行った。測定には、TG−DTA同時測定装置(示差熱−熱重量同時測定装置)、より具体的には、リガク社製の製品名:Thermo Plus TG8210を用いた。次に、得られたグラフからピーク値の温度を読み取った。結果を表1に示す。
2 粘着剤層
3、3’ 加熱接合用シート
4 半導体ウェハ
5 半導体チップ
6 被着体
7 ボンディングワイヤー
8 封止樹脂
10、12 ダイシングテープ付き加熱接合用シート
11 ダイシングテープ
Claims (6)
- 下記引張試験方法により得られる引張弾性率が10〜3000MPaであり、
金属微粒子を60〜98重量%の範囲内で含み、
大気雰囲気下、昇温速度10℃/分の条件で、23℃から400℃まで昇温を行った後のエネルギー分散型X線分析により得られる炭素濃度が15重量%以下であることを特徴とする加熱接合用シート。
引張試験方法:
(1)試験試料として、厚さ200μm、幅10mm、長さ40mmの加熱接合用シートを準備し、
(2)チャック間距離10mm、引張速度50mm/分、23℃の条件で引張試験を行い、
(3)得られた応力−ひずみ線図の直線部分の傾きを引張弾性率とする。 - 大気雰囲気下、昇温速度10℃/分の条件で、23℃から500℃まで示差熱分析を行った際のピークが150〜350℃に存在することを特徴とする請求項1に記載の加熱接合用シート。
- アクリル樹脂、及び、ポリカーボネート樹脂のうち少なくとも一種を含むことを特徴とする請求項1又は2に記載の加熱接合用シート。
- 前記金属微粒子が、銀、銅、酸化銀、酸化銅からなる群より選ばれる少なくとも1種であることを特徴とする請求項1〜3のいずれか1に記載の加熱接合用シート。
- 23℃での厚さが、5〜100μmであることを特徴とする請求項1〜4のいずれか1に記載の加熱接合用シート。
- ダイシングテープと、
前記ダイシングテープ上に積層された請求項1〜5のいずれか1に記載の加熱接合用シートとを有することを特徴とするダイシングテープ付き加熱接合用シート。
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EP3239258A4 (en) | 2017-12-20 |
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JP6682235B2 (ja) | 2020-04-15 |
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