JP6536397B2 - 電子装置、電子装置の製造方法及び電子機器 - Google Patents
電子装置、電子装置の製造方法及び電子機器 Download PDFInfo
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- JP6536397B2 JP6536397B2 JP2015253364A JP2015253364A JP6536397B2 JP 6536397 B2 JP6536397 B2 JP 6536397B2 JP 2015253364 A JP2015253364 A JP 2015253364A JP 2015253364 A JP2015253364 A JP 2015253364A JP 6536397 B2 JP6536397 B2 JP 6536397B2
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Description
図1は端子群同士の接合の一例を示す図である。
図1には、基板100に設けられた端子110群と、基板200に設けられた端子210群との接合の一例について図示している。図1(A)には、基板100の端子110群と基板200の端子210群との接合前の状態の一例を示し、図1(B)には、接合後の状態の一例を示している。
まず、図1(A)に示すように、上側の基板100の端子110群が設けられた表面100aと、下側の基板200の端子210群が設けられた表面200aとが、対向される。その際、下側の基板200は、例えば、孔410を有する吸着ステージ400上に、端子210群が設けられている表面200aと反対側の面(裏面)200bを吸着ステージ400側に向けて載置され、孔410を通じて吸引され、保持される。上側の基板100は、例えば、孔310を有するボンディングツール300により、端子110群が設けられている表面100aと反対側の面(裏面)100b側が孔310を通じて吸引され、保持される。ボンディングツール300に吸引保持された基板100は、吸着ステージ400上に吸引保持された基板200の上方に、互いの端子110群と端子210群との位置合わせが行われて、対向配置される。
図2は、裏面100bに凹部120を有する基板100Aの端子110群と、基板200の端子210群との接合について説明する図である。図2(A)には、裏面100bに凹部120を有する基板100Aの一例を示している。図2(B)には、基板100Aの端子110群と基板200の端子210群との接合前の状態の一例を示し、図2(C)には、接合後の状態の一例を示している。尚、基板100Aは、裏面100bに凹部120を有する点を除き、上記基板100と同様の構成を有する。
図3(A)には、裏面100bに凹部120を有し、表面100aに高さばらつきのある端子110群を有する基板100Bの一例を示している。図3(B)には、基板100Bの端子110群と基板200の端子210群との接合前の状態の一例を示し、図3(C)には、接合後の状態の一例を示している。尚、基板100Bは、裏面100bに凹部120を有する点、及び表面100aに高さばらつきのある端子110群を有する点を除き、上記基板100と同様の構成を有する。
まず、第1の実施の形態について説明する。
図4には、電子装置1の要部断面を模式的に図示している。電子装置1は、基板10及び基板20を含む。基板10及び基板20は、例えば、半導体チップ、半導体チップに個片化する前のウェハ、或いはインターポーザやプリント基板等の回路基板である。基板10と基板20は、共に半導体チップの組合せ、共にウェハの組合せ、半導体チップとウェハの組合せ、半導体チップと回路基板の組合せ等とすることができる。
基板10を含む電子部品2と接合される基板20は、基板10の表面10a(端子11群の配設面)と対向する面(表面)20aに、端子21群を有する。基板20の端子21群はそれぞれ、基板10の端子11群と対応する位置に設けられる。ここでは、基板20の表面20aから突出するように設けられたポスト21aを含む端子21を例示している。ポスト21aには、Cu、Ni、Au等の材料が用いられる。ポスト21aは、基板20内に設けられる、図示しない電極、配線、ビア等の導体部や、トランジスタ等の回路素子と電気的に接続される。
図5は第1の実施の形態に係る電子部品の形成方法の一例を示す図である。
図6(A)には、電子部品2(基板10)の端子11群と基板20の端子21群との接合前の状態の一例を示し、図6(B)には、接合後の状態の一例を示している。
上記のように、電子装置1では、基板10の裏面10bの凹部12を埋める充填材13と、裏面10b上に充填材13を介して設けられる平板14とにより、端子11群と端子21群との接合不良が効果的に抑えられる。
図7(A)には、基板10の別例の要部断面を模式的に図示している。図7(B)には、電子部品2の別例の要部断面を模式的に図示している。図7(C)には、電子装置1の別例の要部断面を模式的に図示している。
図8(A)には、基板20の別例の要部断面を模式的に図示している。図8(B)には、電子装置1の別例の要部断面を模式的に図示している。
図9は第3の変形例を示す図である。
図9に示す電子部品2の基板10は、端子11として、半田ボールバンプを有する。この図9(A)に示すような基板10を含む電子部品2が用いられ、図9(B)に示すように、電子部品2(基板10)の端子11の半田ボールバンプ群が、例えば基板20の端子21のパッド群に接合される。半田接合部50は、接合前の半田ボールバンプが、基板10と基板20との接合時に溶融されて形成される。或いは、半田接合部50は、接合前の半田ボールバンプと、接合前の端子21(パッド)上に設けられる半田とが、基板10と基板20との接合時に溶融一体化されて形成される。半田ボールバンプ、或いは更に端子21上の半田には、Sn半田、Sn−Ag半田、Sn−Ag−Cu半田、Sn−In半田、Sn−Bi半田等の材料が用いられる。
図10には、電子装置1aの要部断面を模式的に図示している。図10に示す電子装置1aは、基板10、充填材13及び平板14を備える上側の電子部品2と、基板70、充填材73及び平板74を備える下側の電子部品2aとを含む。
基板10(電子部品2)の端子11(ポスト11a)と、基板70の端子71(ポスト71a)とは、半田接合部50によって接合される。半田接合部50は、例えば、接合前の基板10のポスト11a上に設けられる半田と、接合前の基板70のポスト71a上に設けられる半田とが、接合時に溶融一体化されることで形成される。基板10のポスト11a上の半田、基板70のポスト71a上の半田には、Sn半田、Sn−Ag半田、Sn−Ag−Cu半田、Sn−In半田、Sn−Bi半田等の材料が用いられる。半田接合部50により、基板10と基板70とが、ポスト11a、半田接合部50及びポスト71aによって電気的及び機械的に接続される。更に、半田接合部50を介して接合される基板10と基板70との間に設けられる樹脂層60により、基板10と基板70との間の接合強度の向上が図られる。
まず、第2の実施の形態について説明する。
図11は第2の実施の形態に係る電子部品の形成方法の一例を示す図である。
半導体基板15Aの表面には、トランジスタ、抵抗、容量等の回路素子が形成される。ここでは、半導体基板15Aに形成される回路素子として、素子分離領域15Abで画定される素子領域に形成された1つのトランジスタ15Aaを例示している。
図12(A)には、電子部品2A(半導体チップ10A)の端子11A群と半導体チップ20Aの端子21A群との接合前の状態の一例を示し、図12(B)には、接合時の状態の一例を示している。図12(C)には、接合後の状態の一例を示している。
ここでは、上記第1の実施の形態で述べた基板10として半導体チップを用い、基板20として回路基板を用いた場合の例を、第3の実施の形態として説明する。
図13(A)には、第1の構成例に係る電子装置1Bの要部断面を模式的に図示している。図13(A)に示す電子装置1Bは、上記図11(A)〜(C)に示すような工程で形成される半導体チップ10A、充填材13A及び平板14Aを含む電子部品2Aと、インターポーザ20Bとを含む。
ここでは、上記第1の実施の形態で述べた基板10として半導体チップを用い、基板20としてウェハを用いた場合の例を、第4の実施の形態として説明する。
図14には、電子装置1Dの要部断面を模式的に図示している。図14に示す電子装置1Dは、上記図11(A)〜(C)に示すような工程で形成される半導体チップ10A、充填材13A及び平板14Aを含む電子部品2A群と、それらが実装されたウェハ20Dとを含む。尚、図14(及び後述の図15)では、電子部品2Aに含まれる半導体チップ10Aの内部構造の詳細な図示を省略している。
図15には、上記図14に示す電子装置1Dから取得される電子装置1Daの要部断面を模式的に図示している。上記図14に示す電子装置1Dは、そのウェハ20Dのダイシングライン27Dに沿ってダイシングされ、電子部品2Aが接合されている半導体チップ形成領域28Dが個片化される。これにより、図15に示すように、半導体チップ形成領域28Dに形成されている所定構造の半導体チップ28Daに、電子部品2Aが接合された、個々の電子装置1Da(例えば上記図12(C)の電子装置1A)が取得される。
ここでは、上記第1の実施の形態で述べた基板10及び基板20としてウェハを用いた場合の例を、第5の実施の形態として説明する。
図16(A)には、ウェハ10Bの吸引工程の要部断面を模式的に図示している。図16(B)には、充填材13Bの配設工程の要部断面を模式的に図示している。図16(C)には、平板14Bの配設工程の要部断面を模式的に図示している。
図17(A)には、電子部品2B(ウェハ10B)の端子11B群とウェハ20Dの端子21D群との接合前の状態の一例を示し、図17(B)には、接合時の状態の一例を示している。図17(C)には、接合後の状態の一例を示している。
ウェハ20Dは、図17(A)に示すように、裏面20Db側を吸引する吸着ステージ40上に保持される。ウェハ10Bを含む電子部品2Bは、図17(A)に示すように、平板14B側を吸引するボンディングツール30で保持され、吸着ステージ40上のウェハ20Dの上方に、端子11B群と端子21D群とが位置合わせされて対向配置される。
このようにウェハ10Bを含む電子部品2Bが、ウェハ20Dに接合される電子装置1Eでも、充填材13B及び平板14Bにより、接合時における端子11B群と端子21D群との間の距離のばらつき、それによる接合不良の発生が効果的に抑えられる。これにより、高性能及び高品質の電子装置1Eが実現される。
図18には、上記図17(C)に示す電子装置1Eから取得される電子装置1Eaの要部断面を模式的に図示している。例えば、上記図17(C)に示す電子装置1Eでは、その電子部品2Bに含まれるウェハ10Bのダイシングライン17Bと、ウェハ20Dのダイシングライン27Dとが、予め対応する位置に設けられる。このような電子装置1Eが、そのウェハ10Bのダイシングライン17B、及びウェハ20Dのダイシングライン27Dに沿ってダイシングされ、互いの半導体チップ形成領域18B及び半導体チップ形成領域28Dが個片化される。これにより、図18に示すように、各々に形成されている半導体チップ18Baと半導体チップ28Daとが接合された、個々の電子装置1Ea(例えば上記図12(C)の電子装置1A)が取得される。
図19(A)には、ウェハ10Bのダイシング工程の要部断面を模式的に図示している。図19(B)には、個片化された電子部品2Cの接合工程の要部断面を模式的に図示している。図19(C)には、ウェハ20Dのダイシング工程の要部断面を模式的に図示している。
以上述べた第1〜第5の実施の形態に関し、電子装置の一例を更に図20に示す。図20には、電子装置の一例の斜視模式図を示している。例えば、上記第1の実施の形態で述べた平板14は、図20に示すように、平面視で基板10の裏面10bと同じか又は同等のサイズとされる。これにより、接合不良を抑えるために充填材13と共に平板14を設けることによる基板10及び電子部品2の大型化(平面サイズの大型化)が抑えられる。
以上説明した実施の形態に関し、更に以下の付記を開示する。
前記凹部に設けられた充填材と、
前記第2面上に前記充填材を介して設けられた平板と、
前記第1基板の前記第1面側に設けられ、前記第1面と対向する第3面に前記第1端子群と接合された第2端子群を有する第2基板と
を含むことを特徴とする電子装置。
(付記3) 前記第1基板は、半導体素子であることを特徴とする付記1に記載の電子装置。
(付記5) 前記充填材は、前記第1基板と同じか又は前記第1基板よりも高い熱伝導性を有することを特徴とする付記1乃至4のいずれかに記載の電子装置。
(付記7) 前記第1基板と前記第2基板との間に介在され、接合された前記第1端子群及び前記第2端子群を覆う樹脂層を更に含むことを特徴とする付記1乃至6のいずれかに記載の電子装置。
(付記9) 第1面に第1端子群を有し、前記第1面と反対側の第2面に凹部を有する第1基板と、
前記凹部に設けられた充填材と、
前記第2面上に前記充填材を介して設けられた平板と
を含む電子部品を準備する工程と、
前記電子部品の前記第1面と、第3面に第2端子群を有する第2基板の前記第3面とを対向させ、前記第1端子群と前記第2端子群とを接合する工程と
を含むことを特徴とする電子装置の製造方法。
前記第1基板の前記第1面側を第1吸着面に吸引保持する工程と、
吸引保持された前記第1基板の前記凹部に、前記充填材を設ける工程と、
吸引保持された前記第1基板の前記第2面上に、前記充填材を介して前記平板を設ける工程と
を含むことを特徴とする付記9に記載の電子装置の製造方法。
(付記13) 前記平板を設ける工程後に、前記第1基板及び前記平板を、前記第1基板の前記半導体素子が個片化される位置で切断する工程を含むことを特徴とする付記12に記載の電子装置の製造方法。
(付記16) 前記電子部品を準備する工程は、前記第1面上に、前記第1端子群を覆う樹脂層を設ける工程を更に含むことを特徴とする付記9乃至15のいずれかに記載の電子装置の製造方法。
前記凹部に設けられた充填材と、
前記第2面上に前記充填材を介して設けられた平板と、
前記第1基板の前記第1面側に設けられ、前記第1面と対向する第3面に前記第1端子群と接合された第2端子群を有する第2基板と
を含む電子装置を備えることを特徴とする電子機器。
2,2a,2A,2B,2C,91 電子部品
10,20,70,100,100A,100B,200 基板
10A,20A,18Ba,28Da 半導体チップ
10B,20D ウェハ
10a,10Aa,10Ba,20a,20Aa,20Ba,20Ca,20Da,70a,100a,200a 表面
10b,10Ab,10Bb,20b,20Ab,20Bb,20Cb,20Db,70b,100b,200b 裏面
11,11A,11B,21,21A,21B,21C,21D,22,22A,71,110,210 端子
11a,11Aa,11Ba,21a,21Aa,21Ba,21Ca,21Da,71a,111,211 ポスト
11b,11Ab,11Bb,21b,21Ab,21Db,112,212 半田
12,12A,12B,72,120,121 凹部
13,13a,13Aa,13A,13Ba,13B,73 充填材
14,14A,14B,74 平板
15A 半導体基板
15Aa トランジスタ
15Ab 素子分離領域
16A 配線層
16Aa,26Ba,26Ca 配線
16Ab,26Bb,26Cb ビア
16Ac,26Cc 電極
16Ad,26Cd 絶縁部
17B,27D ダイシングライン
18B,28D 半導体チップ形成領域
20B インターポーザ
20C プリント基板
23,23A 導体
25B 基材
30,300 ボンディングツール
30a,40a,300a 吸着面
31,41,310,410 孔
40,400 吸着ステージ
50,50A,50B,50C,50D,50E,92,500 半田接合部
60,60a,60Aa,60A,60Ba,60B,60C,60D,60E 樹脂層
80 供給装置
90 電子機器
Claims (8)
- 第1面に第1端子群を有し、前記第1面と反対側の第2面に凹部を有する第1基板と、
前記凹部に設けられた充填材と、
前記第2面上に前記充填材を介して設けられた平板と、
前記第1基板の前記第1面側に設けられ、前記第1面と対向する第3面に前記第1端子群と接合された第2端子群を有する第2基板と
を含むことを特徴とする電子装置。 - 前記第1端子群と前記第2端子群の少なくとも一方は、突起状であることを特徴とする請求項1に記載の電子装置。
- 前記充填材は、前記第1基板と同じか又は前記第1基板よりも高い熱伝導性を有することを特徴とする請求項1又は2に記載の電子装置。
- 前記平板は、前記第1基板と同じか又は前記第1基板よりも高い熱伝導性及び剛性を有することを特徴とする請求項1乃至3のいずれかに記載の電子装置。
- 第1面に第1端子群を有し、前記第1面と反対側の第2面に凹部を有する第1基板と、
前記凹部に設けられた充填材と、
前記第2面上に前記充填材を介して設けられた平板と
を含む電子部品を準備する工程と、
前記電子部品の前記第1面と、第3面に第2端子群を有する第2基板の前記第3面とを対向させ、前記第1端子群と前記第2端子群とを接合する工程と
を含むことを特徴とする電子装置の製造方法。 - 前記電子部品を準備する工程は、
前記第1基板の前記第1面側を第1吸着面に吸引保持する工程と、
吸引保持された前記第1基板の前記凹部に、前記充填材を設ける工程と、
吸引保持された前記第1基板の前記第2面上に、前記充填材を介して前記平板を設ける工程と
を含むことを特徴とする請求項5に記載の電子装置の製造方法。 - 前記第1端子群と前記第2端子群とを接合する工程は、前記電子部品の前記平板側を第2吸着面に吸引保持し、前記第1面を前記第3面に対向させる工程を含むことを特徴とする請求項5又は6に記載の電子装置の製造方法。
- 第1面に第1端子群を有し、前記第1面と反対側の第2面に凹部を有する第1基板と、
前記凹部に設けられた充填材と、
前記第2面上に前記充填材を介して設けられた平板と、
前記第1基板の前記第1面側に設けられ、前記第1面と対向する第3面に前記第1端子群と接合された第2端子群を有する第2基板と
を含む電子装置を備えることを特徴とする電子機器。
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