JP4575782B2 - 3次元デバイスの製造方法 - Google Patents
3次元デバイスの製造方法 Download PDFInfo
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- JP4575782B2 JP4575782B2 JP2004563148A JP2004563148A JP4575782B2 JP 4575782 B2 JP4575782 B2 JP 4575782B2 JP 2004563148 A JP2004563148 A JP 2004563148A JP 2004563148 A JP2004563148 A JP 2004563148A JP 4575782 B2 JP4575782 B2 JP 4575782B2
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Description
図1は、ウェハの前面1aに隣接したウェハの領域1dに、デバイスおよび数レベルの高密度相互接続配線11(通常Cu)を有する、ウェハ1の横断面図を示す。ウェハには金属化バイア12が形成されており、バイアはデバイスおよび横方向の相互接続の領域1dの下まで延在している。これらのバイアは、ウェハ1を薄くした後、垂直貫通接続の一部となるものである。バイア12は、一般に、ウェハ1に孔をエッチングし、孔の側部と底部にライナー材料の層を形成し、孔に金属(好ましくは銅)を充填することによって形成される。バイア12の深さは、薄くした後のウェハ1の最終的な厚みより小さい。したがって、薄くした後のウェハの厚みが約10μmの場合は、バイアの深さは10μm未満である。バイア12の直径は、熱伝導とスペースの問題をバランスさせるように選ばなければならない。約1μmの直径は、ウェハ表面上の最小限のスペースを消費し、かつウェハを通して許容できる熱伝導を提供する。より小さいバイア直径を用いることもできるが、垂直ウェハ・スタックを通して熱を伝導するには十分でない恐れがある。
垂直スタックにウェハを接合する代替方法を図10〜14に示す。この方法を3つのウェハについて詳述するが、上記のように、より多いまたは少ないウェハにも適用することができる。図1〜3に示した方法で、まずウェハ1を作製する。したがって、このウェハは、約10μmに薄くされており、裏面に開口13を有する金属化バイア12を持ち、ポリアミド層16を有する前面にハンドリング・プレート15が取付けられている。
Claims (4)
- 垂直に積層され相互接続された複数のウェハを含む3次元集積デバイスの製造方法であって、 前面(1a)と裏面(1b)を有し、前記ウェハ前面に隣接した領域(1d)に形成されたデバイスを有する、第1のウェハ(1)を設けるステップと、
前記第1のウェハに、前記前面から延在し、前記前面での横方向寸法(121)を特徴とするバイア(12)を形成するステップと、
前記第1のウェハから、前記ウェハ裏面(1b)の材料を除去するステップと、
前記第1のウェハの前記裏面に、前記バイアの前記横方向寸法より大きい横方向寸法を有する開口(13)を形成することにより、前記バイアを露出させるステップと、
前記開口に導電材料の層(14)を形成するステップと、
前面(2a)と裏面(2b)を有し、前記ウェハ前面に隣接した内部に形成されたデバイスを有する、第2のウェハ(2)を設けるステップと、
前記第2のウェハの前記前面にスタッド(27)を形成するステップと、
前記第2のウェハの前記前面(2a)に、前記スタッドがそこから垂直に突き出るように、接合材料の層(26)を形成するステップと、
前記第1のウェハの前記裏面の前記開口(13)に、前記スタッド(27)を位置合わせするステップと、
前記接合材料の層(26)を用いて前記第2のウェハを前記第1のウェハに接合して、前記スタッドを前記バイアと電気的に接触させるステップと
を含む方法であって、
前記第1のウェハの前記裏面に電気的接続の一部を形成しない追加の開口(113)を形成するステップと、
前記追加の開口に導電材料の追加の層(114)を形成するステップと、
前記第2のウェハの前記前面に追加のスタッド(127)を形成するステップと、
前記追加のスタッド(127)を、前記第1のウェハの前記裏面の前記追加の開口(113)に位置を合わせるステップと、
をさらに含み、
前記第2のウェハを前記第1のウェハに接合する前記ステップが、前記第2のウェハと前記第1のウェハとの間に熱を伝導するために、前記追加のスタッド(127)と前記導電材料の追加の層(114)との接続を形成することを特徴とする方法。 - 垂直に積層され相互接続された複数のウェハを含む3次元集積デバイスの製造方法であって、
前面(1a)と裏面(1b)を有し、前記ウェハ前面に隣接した領域(1d)に形成されたデバイスを有する、第1のウェハ(1)を設けるステップと、
前記第1のウェハに、前記前面から延在し、前記前面での横方向寸法(121)を特徴とするバイア(12)を形成するステップと、
前記第1のウェハから、前記ウェハ裏面(1b)の材料を除去するステップと、
前記第1のウェハの前記裏面に、前記バイアの前記横方向寸法より大きい横方向寸法を有する開口(13)を形成することにより、前記バイアを露出させるステップと、
前記開口に導電材料の層(14)を形成するステップと、
前面(2a)と裏面(2b)を有し、前記ウェハ前面に隣接した内部に形成されたデバイスを有する、第2のウェハ(2)を設けるステップと、
前記第2のウェハの前記前面にスタッド(27)を形成するステップと、
前記第2のウェハの前記前面(2a)に、前記スタッドがそこから垂直に突き出るように、接合材料の層(26)を形成するステップと、
前記第1のウェハの前記裏面の前記開口(13)に、前記スタッド(27)を位置合わせするステップと、
前記接合材料の層(26)を用いて前記第2のウェハを前記第1のウェハに接合して、前記スタッドを前記バイアと電気的に接触させるステップと
を含む方法であって、
前記第2のウェハ(2)に、前記ウェハ前面(2a)から延在し、前記前面(2a)での横方向寸法(221)を特徴とするバイア(22)を形成するステップと、
前記第2のウェハから、前記ウェハ裏面(2b)の材料を除去するステップと、
前記第2のウェハの前記裏面(2b)に、前記バイア(22)の前記横方向寸法(221)より大きい横方向寸法を有する開口(23)を形成することにより、前記バイア(22)をその内部に露出させるステップと、
前記開口に導電材料の層(24)を形成するステップと、
前面(3a)を有し、前記ウェハ前面に隣接した内部に形成されたデバイスを有する、第3のウェハ(3)を設けるステップと、
前記第3のウェハの前記前面(3a)にスタッド(37)を形成するステップと、
前記第3のウェハの前記前面(3a)に、前記スタッドがそこから垂直に突き出るように、接合材料の層(36)を形成するステップと、
前記第2のウェハの前記裏面の前記開口(23)に、前記スタッド(37)を位置合わせするステップと、
前記接合材料の層(36)を用いて前記第3のウェハを前記第2のウェハに接合して、前記第3のウェハの前記スタッド(37)を、前記第2のウェハの前記バイア(22)、前記第2のウェハの前記スタッド(27)、および前記第1のウェハの前記バイア(12)と電気的に接触させるステップと
をさらに含み、
前記第1のウェハの前記裏面に電気的接続の一部を形成しない追加の開口(113)を形成するステップと、
前記追加の開口に導電材料の追加の層(114)を形成するステップと、
前記第2のウェハの前記前面に追加のスタッド(127)を形成するステップと、
前記追加のスタッド(127)を、前記第1のウェハの前記裏面の前記追加の開口(113)に位置を合わせるステップと、
をさらに含み、
前記第2のウェハを前記第1のウェハに接合する前記ステップが、前記第2のウェハと前記第1のウェハとの間に熱を伝導するために、前記追加のスタッド(127)と前記導電材料の追加の層(114)との接続を形成する方法。 - 前記導電材料の追加の層(114)が、前記バイア(12)から電気的に絶縁されていることを特徴とする請求項1または2に記載の方法。
- 前記第2のウェハの前記裏面に、電気的接続の一部を形成しない追加の開口を形成するステップと、
前記追加の開口に導電材料の追加の層を形成するステップと、
前記第3のウェハの前記前面に追加のスタッドを形成するステップと、
前記追加のスタッドを、前記第2のウェハの前記裏面の前記追加の開口に位置合わせするステップと、
をさらに含み、
前記第3のウェハを前記第2のウェハに接合する前記ステップが、前記第3のウェハと前記第2のウェハとの間に熱を伝導するために、前記追加のスタッドと前記導電材料の追加の層との接続を形成することを特徴とする、請求項2に記載の方法。
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US6093969A (en) * | 1999-05-15 | 2000-07-25 | Lin; Paul T. | Face-to-face (FTF) stacked assembly of substrate-on-bare-chip (SOBC) modules |
JP2001326325A (ja) * | 2000-05-16 | 2001-11-22 | Seiko Epson Corp | 半導体装置及びその製造方法 |
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JP3951091B2 (ja) * | 2000-08-04 | 2007-08-01 | セイコーエプソン株式会社 | 半導体装置の製造方法 |
US6444560B1 (en) * | 2000-09-26 | 2002-09-03 | International Business Machines Corporation | Process for making fine pitch connections between devices and structure made by the process |
JP4560958B2 (ja) * | 2000-12-21 | 2010-10-13 | 日本テキサス・インスツルメンツ株式会社 | マイクロ・エレクトロ・メカニカル・システム |
US6489217B1 (en) * | 2001-07-03 | 2002-12-03 | Maxim Integrated Products, Inc. | Method of forming an integrated circuit on a low loss substrate |
-
2002
- 2002-12-20 AU AU2002368524A patent/AU2002368524A1/en not_active Abandoned
- 2002-12-20 JP JP2004563148A patent/JP4575782B2/ja not_active Expired - Fee Related
- 2002-12-20 CN CNB028300335A patent/CN100383936C/zh not_active Expired - Fee Related
- 2002-12-20 WO PCT/US2002/041181 patent/WO2004059720A1/en active Application Filing
- 2002-12-20 EP EP02808338A patent/EP1573799B1/en not_active Expired - Lifetime
- 2002-12-20 DE DE60235267T patent/DE60235267D1/de not_active Expired - Lifetime
- 2002-12-20 AT AT02808338T patent/ATE456860T1/de not_active IP Right Cessation
-
2003
- 2003-12-02 TW TW092133840A patent/TWI242249B/zh not_active IP Right Cessation
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2005
- 2005-06-19 IL IL169264A patent/IL169264A0/en unknown
Also Published As
Publication number | Publication date |
---|---|
AU2002368524A1 (en) | 2004-07-22 |
CN100383936C (zh) | 2008-04-23 |
EP1573799A1 (en) | 2005-09-14 |
DE60235267D1 (de) | 2010-03-18 |
EP1573799A4 (en) | 2009-02-25 |
TW200520108A (en) | 2005-06-16 |
WO2004059720A1 (en) | 2004-07-15 |
ATE456860T1 (de) | 2010-02-15 |
TWI242249B (en) | 2005-10-21 |
EP1573799B1 (en) | 2010-01-27 |
JP2006522461A (ja) | 2006-09-28 |
CN1708840A (zh) | 2005-12-14 |
IL169264A0 (en) | 2007-07-04 |
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