JPH0344067A - 半導体基板の積層方法 - Google Patents

半導体基板の積層方法

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Publication number
JPH0344067A
JPH0344067A JP1179268A JP17926889A JPH0344067A JP H0344067 A JPH0344067 A JP H0344067A JP 1179268 A JP1179268 A JP 1179268A JP 17926889 A JP17926889 A JP 17926889A JP H0344067 A JPH0344067 A JP H0344067A
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JP
Japan
Prior art keywords
thin film
layer
film device
forming
semiconductor substrate
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Pending
Application number
JP1179268A
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English (en)
Inventor
Yoshihiro Hayashi
喜宏 林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
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Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP1179268A priority Critical patent/JPH0344067A/ja
Priority to US07/551,095 priority patent/US5087585A/en
Publication of JPH0344067A publication Critical patent/JPH0344067A/ja
Pending legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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    • H01L21/67Apparatus 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
    • H01L21/683Apparatus 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
    • H01L21/6835Apparatus 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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    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/04Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
    • H01L25/065Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L27/00
    • H01L25/0657Stacked arrangements of devices
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/50Multistep manufacturing processes of assemblies consisting of devices, each device being of a type provided for in group H01L27/00 or H01L29/00
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2221/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
    • H01L2221/67Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere
    • H01L2221/683Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus 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
    • H01L2221/68304Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus 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
    • H01L2221/6834Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus 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 used to protect an active side of a device or wafer
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2221/00Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
    • H01L2221/67Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere
    • H01L2221/683Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus 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
    • H01L2221/68304Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus 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
    • H01L2221/68368Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus 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 used in a transfer process involving at least two transfer steps, i.e. including an intermediate handle substrate
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    • H01L2224/10Bump connectors; Manufacturing methods related thereto
    • H01L2224/15Structure, shape, material or disposition of the bump connectors after the connecting process
    • H01L2224/16Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
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    • H01L2225/03All the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/648 and H10K99/00
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    • H01L2225/06503Stacked arrangements of devices
    • H01L2225/06513Bump or bump-like direct electrical connections between devices, e.g. flip-chip connection, solder bumps
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    • H01L2225/065All the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/648 and H10K99/00 the devices not having separate containers the devices being of a type provided for in group H01L27/00
    • H01L2225/06503Stacked arrangements of devices
    • H01L2225/06555Geometry of the stack, e.g. form of the devices, geometry to facilitate stacking
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    • H01L2924/11Device type
    • H01L2924/13Discrete devices, e.g. 3 terminal devices
    • H01L2924/1304Transistor
    • H01L2924/1306Field-effect transistor [FET]
    • H01L2924/13091Metal-Oxide-Semiconductor Field-Effect Transistor [MOSFET]
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    • H01L2924/1901Structure
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    • H01L2924/19041Component type being a capacitor

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  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 (産業上の利用分野ン 本発明は半導体基板の積層方法に関するものであり、詳
しくは複数の薄膜デバイスを半導体装置上に順次積層す
る半導体基板の積層方法に関するものである。
(従来の技術) 3次元LSIを製造する方法として、従来、MOSトラ
ンジスタ等のデバイスがすでに形成されている半導体基
板を張り合わせる方法が知られている(安本雅昭ら、S
em1conductor world、 5.、 p
pl−8)。この方法ではまず第3図(a)に示したよ
うにデバイス層(31)の上に金バンプ等の接続電極(
32)が形成された第1の半導体基板(33)及び第2
の半導体基板(34)を用意する。その後、第3図(b
)に示したようにデバイス形成筒がそれぞれ向かい合う
ように、すなわちデバイス上に形成されている接続電極
がお互いに向かい合うように2枚の基板を位置合わせし
て接合することにより2層構造の3次元LSIを得る。
(発明が解決しようとする課題) しかしながら、上述した積層方法では3層以上のデバイ
スを積層することはできない。あえて上述した積層方法
により3層以」二のデバイスを積層するには、第3図(
C)に示したように、張り合わせた第2の半導体基板(
34)の裏面より選択ポリッシング(浜口恒夫ら、応用
物理、56[11]pp1480(1987))を行い
、薄膜デバイス(35)を作威し、さらにその裏面に第
3層目デバイスを接続するための裏面側接続電極(36
)を形成しなければならない。すなわち、この方法によ
り3層以上のデバイスを接続するためには、2層以上の
デバイスが既に積層された半導体基板に対して、半導体
基板を薄膜化するための研磨工程を行わなければならず
、研磨の際に加わる応力かみ接続電極部に作用し接続不
良を導く恐れがある。
本発明の目的は2層以上のデバイスが既に積層された基
板にさらにデバイスを積層するときこの基板を研磨・薄
膜化する工程を必要としない積層方法を提供することに
ある。
(課題を解決するための手段) 本発明は、以下の(ア)に示す積層用薄膜デバイス形成
プロセスにより薄膜デバイスの表面およびその裏面にそ
れぞれ接続電極を形成し、さらに以下の(イ)に示す薄
膜デバイス積層プロセスにより第1の半導体基板に形成
された第1層目あるいは第2層目デバイス上に前記薄膜
デバイスを順次積層することを特徴とする半導体基板の
積層方法である。
(ア)積層用薄膜デバイス形成プロセス半導体基板にデ
バイスを形成する工程と、前記デバイス」二に表面側接
続電極を形成する工程と、前記半導体基板のデバイス形
成形成面側に支持基板を接着する工程と、前記半導体基
板を薄膜化することにより薄膜デバイスを形成する工程
と、前記薄膜デバイス上に裏面絶縁膜を形成する工程と
、前記薄膜デバイスに裏面側接続電極を形成する工程と
により、支持基板に接着された状態の薄膜デバイス表面
及びその裏面にそれぞれ接続電極を形成するプロセス。
(イ)薄膜デバイス積層プロセス 第1の半導体基板に第1層目あるいは第2層目デバイス
を形成する工程と、このデバイス上に表面側接続電極を
形成する工程と、(ア)に示した薄膜デバイス形成プロ
セスにより得られた第2層目あるいは第3層目薄膜デバ
イスの裏面側接続電極と第1層目あるいは第2層目デバ
イス上の表面側接続電極とを位置合わぜして接続する工
程と、前記薄膜デバイス上に接着されている支持基板お
よび接着剤を除去する工程と、前記第2層目あるいは第
3層目デバイス上の表面側電極と(ア)に示した薄膜デ
バイス形成プロセスにより得られた第3層目薄膜デバイ
スの裏面側接続電極とを位置合わせして接続する工程と
、前記第3層目薄膜デバイス上に接着されている支持基
板および接着剤を除去する工程。
(作用) 本発明による半導体基板の積層方法では、デバイス表面
およびその裏面に接続電極がすでに形成されている薄膜
デバイスを積層単位として第1層目デバイス上に順次積
層するため、デバイスが積層されている構造を有する半
導体基板を研磨・薄膜化する工程を必要としない。すな
わち、積層されたデバイス間の接続電極部に研磨の応力
が作用するといった問題は生じ得ない。
(実施例) 以下、この発明の実施例としてシリコン基板に形成され
たデバイスを3層積層する場合を例にとって説明する。
本発明による半導体基板の積層方法は積層用薄膜デバイ
ス形成プロセスと薄膜デバイス積層プロセスからなる。
第1図(a)〜(e)に積層用薄膜デバイス形成プロセ
スを説明するための製造工程断面図を示す。積層用薄膜
デバイス形成プロセスでは、まず通常のLSI製造工程
によりシリコン基板(11)にデバイス(12)を形成
した(第1図(a))後、前記デバイス(12)上に表
面側後接続電極としてタングステン等の高融点金属バン
プ(13)を形成する($1図(b))。その後、接着
剤(14)を用いてデバイス(12)上に支持基板(1
5)としてシリコン基板を接着しく第1図(C))、さ
らに選択ポリッシング法によりシリコン基板(11)を
研磨することにより薄膜デバイス(16)を得る(第1
図(d))。なお、薄膜デバイスは支持基板に接着され
ているため、機械的および電気的に破壊される心配はな
い。しかる後、薄膜デバイス(16)にSiO2等の裏
面絶縁膜(17)を形成し、さらに裏面側接続電極とし
て前記裏面絶縁膜(17)の開口部にIn等の低融点金
属を埋め込んだ低融点金属プール(18)を形成する。
(第1図(e))。
上述した積層用薄膜デバイス形成プロセスにより、薄膜
デバイスの表面およびその裏面に接続電極を形成し、以
下に述べる薄膜デバイス積層プロセスにより第1の半導
体基板に形成された第1層目デバイス上に順次薄膜デバ
イスを積層する。
第2図に(a)〜(g)に、薄膜デバイス積層プロセス
を説明するための製造工程断面図を示す。まず、第1の
シリコン基板(21)に第1層目デバイス(22)を形
成し、さらに前記第1層目デバイス(22)上に表面側
接続電極として高融点金属バンプ(13)を形成する(
第2図(a))。このあと、前記積層用薄膜デバイス形
成プロセスにより得られた第2層目薄膜デバイス(23
)裏面に形成された低融点金属プール(18)と前記第
1層目デバイス(22)上の高融点金属バンプ(13)
とが向かい合うように位置合わぜを行う(第2図(b)
)。なお、上述した位置合わせには支持基板(15X本
実施例ではシリコン)を透過する赤外線顕微鏡を利用す
る。
しかる後、1層目デバイス(22)上の高融点金属バン
プ(13)が第2層目薄膜デバイス(23)裏面に形成
されている低融点金属プール(18)に挿入されるまで
1層目デバイスと第2層目薄膜デバイスとを密着させ、
接続する(第2図(C))。なお、上述したデバイスの
接続温度は低融点金属プールに埋め込んだ金属の融点よ
りも高い温度、たとえはゴロを埋め込んだ場合には20
0°C〜3000Cである。その後、エツチングにより
支持基板(15)を除去し、さらに酸素プラズマ処理に
より接着剤(14)を除去する(第2図(d))。
さらに、前記した積層用薄膜デバイス形成プロセスによ
り得られた第3層目薄膜デバイス(24)を用意し、裏
面に形成された低融点金属プール(18)と第2層目薄
膜デバイス上の高融点金属バンプ(13)とが向かい合
うように位置合わせを行い(第2図(e))、密着・接
続しく第2図(f))、さらに第3層目薄膜デバイス(
24)上の支持基板(15)および接着剤(14)を除
去する(第2図(g))。
上述した一連の工程により、第1層目薄膜デバイスと第
2層目薄膜デバイスと第3層目薄膜デバイスとが接続さ
れた構造を有する積層デバイスを得る。なお、上述した
実施例ではデバイスを3層積層する場合を述べたが、本
発明によれば4層以上のデバイスを積層しうろことは自
明である。また、上述した実施例では、デバイスを接続
するための接続電極として高融点金属バンプと低融点金
属プールをそれぞれデバイスの表面およびその奥面に形
成し、バンプ・プール間の゛ろう着″によりデバイスを
接続したが、その他のデバイス接続方法、例えば金属バ
ンプと金属バンプとの熱圧着等を利用できることも自明
である。
さらに、本発明によればシリコン基板以外の半導体基板
に形成されたデバイスや絶縁性基板に形成された配線層
を積層することが可能であることは説明するまでもない
(発明の効果) 以上詳述したように、本発明による半導体基板の積層方
法では、デバイスの主なる2面、すなわちデバイス表面
およびその裏面に接続電極がすでに形成されている薄膜
デバイスを積層単位として第1層目あるいは第2層目デ
バイス上に順次積層するため、デバイスが積層されてい
る構造を有する半導体基板を研磨・薄膜化する工程を必
要としない。このため、積層されたデバイス間の接続電
極部に研磨の際に生じる応力が作用するといった問題は
生じ得ない。
さらに、本発明による半導体姑仮の積層方法は薄膜デバ
イス形成プロセスと薄膜デバイス積層プロセスとが完全
に分離されている。このため、予め複数のデバイスのシ
ステム・回路・マスクの設計及び薄膜デバイス形成プロ
セスまでを並列処理で用意しておいた後、薄膜デバイス
積層プロセスにより薄膜デバイスを順次積層するといっ
た一部並列工程処理が可能となり、積層数が増加しても
TATが著しく長期化する恐れもない。
【図面の簡単な説明】
第1図は本発明に係る半導体基板の積層方法のうち積層
用薄膜デバイス形成プロセスの一実施例を説明するため
の製造工程断面図、第2図は本発明に係る薄膜デバイス
の積層プロセスを説明するため(11) の製造工程断面図、第3図は従来の半導体丞仮の積層方
法を説明するための工程断面図である。 11・・・シリコン基板、12・・・デバイス、13・
・、高融点金属バンプ、14・・・接着剤、15・1.
支持基板、16・・・薄膜デバイス、17−1.裏面絶
縁膜、18・、・低融点金属プール、21・・・第1の
シリコン基板、22・・・第1層目デバイス、23・・
・第2層目薄膜デバイス、24・・・第3層目薄膜デバ
イス、31・・・デバイス層、32・・・接続電極、3
3・・・第1の半導体基板、34・・・第2の半導体基
板、35・、・薄膜デバイス、3613.裏面側接続電
極。

Claims (1)

  1. 【特許請求の範囲】 以下の(ア)に示す積層用薄膜デバイス形成プロセスに
    より薄膜デバイスの表面およびその裏面にそれぞれ接続
    電極を形成し、さらに以下の(イ)に示す薄膜デバイス
    積層プロセスにより第1の半導体基板に形成された第1
    層目あるいは第2層目デバイス上に前記薄膜デバイスを
    順次積層することを特徴とする半導体基板の積層方法。 (ア)半導体基板にデバイスを形成する工程と、前記デ
    バイス上に表面側接続電極を形成する工程と、前記半導
    体基板のデバイス形成面側に支持基板を接着する工程と
    、前記半導体基板を薄膜化することにより薄膜デバイス
    を形成する工程と、前記薄膜デバイス上に裏面絶縁膜を
    形成する工程と、前記薄膜デバイスに裏面側接続電極を
    形成する工程とにより、支持基板に接着された状態の薄
    膜デバイス表面及びその裏面にそれぞれ接続電極を形成
    するプロセス。 (イ)第1の半導体基板に第1層目あるいは第1、第2
    層目デバイスを形成する工程と、このデバイス上に表面
    側接続電極を形成する工程と、(ア)に示した薄膜デバ
    イス形成プロセスにより得られた第2層目あるいは第3
    層目薄膜デバイスの裏面側接続電極と第1層目あるいは
    第2層目デバイス上の表面側接続電極とを位置合わせし
    て接続する工程と、前記薄膜デバイス上に接着されてい
    る支持基板および接着剤を除去する工程と、前記第2層
    目あるいは第3層目デバイス上の表面側電極と(ア)に
    示した薄膜デバイス形成プロセスにより得られた第3層
    目薄膜デバイスの裏面側接続電極とを位置合わせして接
    続する工程と、前記第3層目薄膜デバイス上に接着され
    ている支持基板および接着剤を除去する工程。
JP1179268A 1989-07-11 1989-07-11 半導体基板の積層方法 Pending JPH0344067A (ja)

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JP1179268A JPH0344067A (ja) 1989-07-11 1989-07-11 半導体基板の積層方法
US07/551,095 US5087585A (en) 1989-07-11 1990-07-11 Method of stacking semiconductor substrates for fabrication of three-dimensional integrated circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1179268A JPH0344067A (ja) 1989-07-11 1989-07-11 半導体基板の積層方法

Publications (1)

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JPH0344067A true JPH0344067A (ja) 1991-02-25

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US (1) US5087585A (ja)
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