JP2000150518A - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法Info
- Publication number
- JP2000150518A JP2000150518A JP10326396A JP32639698A JP2000150518A JP 2000150518 A JP2000150518 A JP 2000150518A JP 10326396 A JP10326396 A JP 10326396A JP 32639698 A JP32639698 A JP 32639698A JP 2000150518 A JP2000150518 A JP 2000150518A
- Authority
- JP
- Japan
- Prior art keywords
- film
- metal film
- plating
- metal
- wiring pattern
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004065 semiconductor Substances 0.000 title claims description 22
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 238000007747 plating Methods 0.000 claims abstract description 74
- 229910052751 metal Inorganic materials 0.000 claims abstract description 72
- 239000002184 metal Substances 0.000 claims abstract description 72
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 22
- 229910052802 copper Inorganic materials 0.000 claims abstract description 18
- 238000009713 electroplating Methods 0.000 claims abstract description 13
- 229910052737 gold Inorganic materials 0.000 claims abstract description 11
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 9
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 40
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 17
- 239000010949 copper Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 16
- 230000001681 protective effect Effects 0.000 claims description 13
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 10
- 239000010931 gold Substances 0.000 claims description 10
- 238000002161 passivation Methods 0.000 claims description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 8
- 239000011651 chromium Substances 0.000 claims description 8
- 239000010936 titanium Substances 0.000 claims description 8
- MAKDTFFYCIMFQP-UHFFFAOYSA-N titanium tungsten Chemical compound [Ti].[W] MAKDTFFYCIMFQP-UHFFFAOYSA-N 0.000 claims description 8
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 8
- 229910052721 tungsten Inorganic materials 0.000 claims description 8
- 239000010937 tungsten Substances 0.000 claims description 8
- 238000005530 etching Methods 0.000 claims description 6
- 238000004544 sputter deposition Methods 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229920001721 polyimide Polymers 0.000 claims description 5
- 239000009719 polyimide resin Substances 0.000 claims description 4
- 239000000758 substrate Substances 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 230000000873 masking effect Effects 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 238000000206 photolithography Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 101150110620 RR22 gene Proteins 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000866 electrolytic etching Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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Abstract
配線パターンの形成。 【解決手段】ベアチップ1の電極端子および保護膜4上
の全面にTi、Cr、TiW 、W の第1の金属膜6、第1の金
属膜上にCuもしくはNiの第2の金属膜7を形成し、第2
の金属膜上に、形成すべき配線パターン12の部位が溝
となるレジストパターンを形成し、レジストパターンを
マスクとして、露出している第2の金属膜上に電解めっ
きによりCuめっき被膜9を形成し、レジストパターンを
除去することにより露出した第2の金属膜を除去し、Cu
めっき被膜上および第2の金属膜の側面に選択的に電解
めっきにより、Ni/Au めっき被膜10/11を形成し、
露出している第1の金属膜を除去する。
Description
法に関する。
体素子)のまま実装基板に実装することもなされてい
る。この場合、ベアチップ上に、ベアチップに形成され
たパッド(電極端子)に接続する新たな配線パターンを
引回し、この配線パターンの適所に、実装基板側のパッ
ド位置に一致するように接合用の金属バンプを形成し
て、実装基板への実装を可能なようにしている。
配線パターンの形成工程の一例を示す。1はベアチップ
であり、所要の配線パターンが形成してある。2はベア
チップ1の表面に露出して形成されたアルミニウムから
成るパッドである。3はSiO2膜等からなるパッシベーシ
ョン膜、4はパッシベーション膜3を覆って形成された
ポリイミド樹脂からなる保護膜である。
のパッド2が形成された側の全面に、すなわち、パッシ
ベーション膜4およびパッド2の全面にスパッタリング
により、チタン、クロム、チタンタングステン、もしく
はタングステンの第1の金属膜6を形成する。さらに第
1の金属膜6上にスパッタリングにより銅もしくはニッ
ケルの第2の金属膜7を形成する。次いで、第2の金属
膜7上に感光性レジスト層8を形成し、公知のフォトリ
ソグラフィー法により、形成すべき配線パターンに対応
する溝8bが形成されたレジストパターン8aを形成す
る。
ーン8aをマスクとして、溝8bの第2の金属膜7上に
電解銅めっき被膜9を形成し、さらに、その上に表面め
っき被膜である電解ニッケルめっき被膜10、電解金め
っき被膜11を形成する。そして図14に示すように、
レジストパターン8aを除去し、さらに第2の金属膜7
および第1の金属膜6をエッチングにより除去して基板
1上にパッド2に電気的に接続する配線パターン12を
形成するのである。そして、配線パターン12の適所に
はんだボールにより実装基板への接続用のバンプ13を
形成して半導体装置15(図15)に完成される。
しくはタングステンからなる第1の金属膜6は、上層の
銅層7、9とアルミニウム製のパッド2との拡散を防止
して密着性を良好にするためのバリアー層として、さら
にはポリイミド製の保護膜4との密着性を向上させるよ
う機能し、また銅もしくはニッケルの第2の金属膜7は
配線パターンとなる銅めっき被膜9を電解めっきにより
形成する際の下地層として機能する。もちろん、第1お
よび第2の金属膜6、7は電解めっきの際の通電層とし
ても機能する。なお、上記では単体のベアチップで示し
たが、実際には、ベアチップが複数個形成されたウェハ
ーの段階で上記配線パターンの形成が行われ、その後単
体のチップに分離される。
15では、ベアチップ1上に形成する配線パターン12
が、電解銅めっきにより所要の厚さに形成されるので好
適である。しかしながら一方、上記製造方法の制約か
ら、レジストパターン8aを除去すると配線パターン1
2の側面が露出し(図14参照)、銅めっき被膜9の側
面が剥き出しになるため、マイグレーションなどの不良
が発生しやすいという課題がある。
なされたものであり、その目的とするところは、配線パ
ターンの側面にまで表面めっき被膜を形成することので
きる半導体装置の製造方法を提供するにある。
するため次の構成を備える。すなわち、本発明に係る半
導体装置の製造方法では、半導体素子の電極端子形成面
の、アルミニウムから成る電極端子が露出されたパッシ
ベーション膜上に絶縁性の保護膜が形成されると共に、
該保護膜上に前記電極端子と電気的に接続する配線パタ
ーンが形成される半導体装置の製造方法において、前記
半導体素子の電極端子上および前記保護膜上の全面に、
電解めっき被膜を表面に被着することが困難な金属から
なる第1の金属膜を形成する工程と、該第1の金属膜上
に配線パターンの下地層となる第2の金属膜を形成する
工程と、該第2の金属膜上に、形成すべき配線パターン
の部位のレジストが除去されて溝となるレジストパター
ンを形成する工程と、該レジストパターンをマスクとし
て、溝の底面に露出する前記第2の金属膜上に電解めっ
きにより配線パターンとなるめっき被膜を形成する第1
のめっき工程と、前記レジストパターンを除去する工程
と、レジストパターンを除去することにより露出する前
記第2の金属膜を除去する工程と、前記配線パターンと
なるめっき被膜上および前記第2の金属膜の側面に電解
めっきにより表面めっき被膜を選択的に形成する第2の
めっき工程と、前記表面めっき被膜をマスクとして前記
保護膜上に露出している前記第1の金属膜をエッチング
して除去する工程とを具備することを特徴としている。
前記第1の金属膜をチタン、クロム、チタンタングステ
ン、もしくはタングステンにより形成することができ
る。前記第2の金属膜を銅もしくはニッケルにより形成
することができる。前記表面めっき被膜を、ニッケルめ
っき被膜および金めっき被膜で形成することができる。
前記第1および第2の金属膜をスパッタリングにより形
成することができる。前記保護膜をポリイミド樹脂で形
成することができる。
去して後、表面めっき被膜を形成するので、該表面めっ
き被膜を配線パターンの側面にも形成することができ
る。その際露出するチタン、クロム、チタンタングステ
ン、もしくはタングステン等の第1の金属膜は高抵抗
で、表面は酸化されていて、表面に電流が流れにくいた
め、上記めっき被膜は形成されず、したがって別途マス
ク手段を講じることなく容易に配線パターンの側面に選
択的に上記表面めっき被膜を形成できる。
を添付図面に基づいて詳細に説明する。 〔第1の実施の形態〕図1〜図6は半導体装置の製造方
法の第1の実施形態を示す。なお、最終的なめっき構成
自体は図15に示すものと同じであるので、同じ部材は
同一符号をもって示す。すなわち、1はシリコン等から
なるベアチップであり、所要の能動素子および配線パタ
ーンが形成してある。2はベアチップ1の表面に露出し
て形成されたアルミニウムから成るパッド(電極端子)
である。3はSiO2膜等からなるパッシベーション膜、4
はパッシベーション膜3を覆って形成されたポリイミド
樹脂等の絶縁性材料から成る保護膜である。
まず、ベアチップ1のパッド2が形成された側の全面
に、すなわち、パッシベーション膜4およびパッド2の
全面にスパッタリングにより、チタン、クロム、チタン
タングステン、もしくはタングステンから成る第1の金
属膜6を形成する。さらに第1の金属膜6上に、スパッ
タリングにより、配線パターンの下地層となる銅もしく
はニッケルから成る第2の金属膜7を形成する。次い
で、第2の金属膜7上に感光性レジスト層8を形成し、
公知のフォトリソグラフィー法により、形成すべき配線
パターンに対応する溝8b(形成すべき配線パターンの
部位のレジストが除去されて溝となる)が形成されたレ
ジストパターン8aを形成する。
8aをマスクとして、溝8bの底面に露出する第2の被
膜7上に、配線パターンとなるめっき被膜である電解銅
めっき被膜9を所要厚さ形成する(第1のめっき工
程)。その後、図3に示すように、本実施の形態では、
この段階でレジストパターン8aを除去する。さらに図
4に示すように、銅もしくはニッケルから成る第2の金
属膜7をエッチングして除去する。その際、エッチング
液により銅めっき被膜9も若干浸食されるが、第2の金
属膜7は薄いものであるため、ほとんど影響はない。
および第2の金属膜7の側面に電解めっきにより、ニッ
ケルめっき被膜10を形成し、さらにその上に金めっき
被膜11を形成する(表面めっき被膜を形成する第2の
めっき工程) 。この電解めっきの際、露出している第1
の金属膜6上にはめっき被膜が形成されない。すなわ
ち、第1の金属膜6を構成するチタン、クロム、チタン
タングステン、もしくはタングステンの膜は高抵抗で、
表面は極めて酸化されやすい。この酸化膜は、ニッケル
めっき被膜10を形成する際の前処理によっても容易に
除去されない。したがって、表面に電流が流れにくいた
め、めっきをしても表面にめっき被膜は形成されないの
である。これを利用して上記のように容易に必要個所に
選択的にニッケルめっき被膜10および金めっき被膜1
1(表面めっき被膜)を形成することができる。
の金属膜6をエッチングにより除去し、側面もめっき被
膜に覆われた配線パターン12を形成することができ
る。なお、第1の金属膜6の側面は露出するが、第1の
金属膜6自体は数百Åの厚さであるので問題ないし、第
1の金属膜6自体のマイグレーションは問題とならな
い。最後に図15に示すように、配線パターン12の適
所にはんだボールまたはボンディングワイヤ等によりバ
ンプ13等の外部接続端子を形成することにより半導体
装置15とすることができる。
図1に示す工程の後、図7に示すように、溝8b内に電
解銅めっき被膜でなく、配線パターンとなる電解ニッケ
ルめっき被膜9aを形成する。次いで図8に示すよう
に、レジストパターン8aを除去する。そして図9に示
すように、露出している第2の金属膜7を除去し、図1
0に示すように、ニッケルめっき被膜9a上および第2
の金属膜7の側面に電解金めっき被膜11を形成する。
第1の金属膜6をエッチングにより除去して配線パター
ン12を形成する。すなわち本実施の形態では、ニッケ
ルめっき被膜9aの上にさらにニッケルめっき被膜を形
成する必要はないから、直接、表面めっき被膜である金
めっき被膜11を形成するのである。そして図15に示
すのと同様に、配線パターン12の適所にバンプを形成
して半導体装置に完成する。
金属膜6は、表面に電解めっき被膜を被着することが困
難な金属であればよく、上記金属に限定されない。また
第2の金属膜7も上記に限定されない。さらには、配線
パターンとなるめっき被膜や表面めっき被膜も必ずしも
上記のものに限定されない。
れば、レジストパターンおよび第2の金属膜を除去して
後、表面めっき被膜を形成するので、該表面めっき被膜
を配線パターンの側面にも形成することができる。その
際露出するチタン、クロム、チタンタングステン、もし
くはタングステン等の第1の金属膜は高抵抗で、表面は
酸化されていて、表面に電流が流れにくいため、上記め
っき被膜は形成されず、したがって別途マスク手段を講
じることなく容易に配線パターンの側面に選択的に上記
表面めっき被膜を形成できる。
態の説明図、
した状態の説明図、
明図、
状態の説明図、
説明図、
Claims (8)
- 【請求項1】 半導体素子の電極端子形成面の、アルミ
ニウムから成る電極端子が露出されたパッシベーション
膜上に絶縁性の保護膜が形成されると共に、該保護膜上
に前記電極端子と電気的に接続する配線パターンが形成
される半導体装置の製造方法において、 前記半導体素子の電極端子上および前記保護膜上の全面
に、電解めっき被膜を表面に被着することが困難な金属
からなる第1の金属膜を形成する工程と、 該第1の金属膜上に配線パターンの下地層となる第2の
金属膜を形成する工程と、 該第2の金属膜上に、形成すべき配線パターンの部位の
レジストが除去されて溝となるレジストパターンを形成
する工程と、 該レジストパターンをマスクとして、溝の底面に露出す
る前記第2の金属膜上に電解めっきにより配線パターン
となるめっき被膜を形成する第1のめっき工程と、 前記レジストパターンを除去する工程と、 レジストパターンを除去することにより露出する前記第
2の金属膜を除去する工程と、 前記配線パターンとなるめっき被膜上および前記第2の
金属膜の側面に電解めっきにより表面めっき被膜を選択
的に形成する第2のめっき工程と、 前記表面めっき被膜をマスクとして前記保護膜上に露出
している前記第1の金属膜をエッチングして除去する工
程とを具備することを特徴とする半導体装置の製造方
法。 - 【請求項2】 前記第1の金属膜をチタン、クロム、チ
タンタングステン、もしくはタングステンにより形成す
ることを特徴とする請求項1記載の半導体装置の製造方
法。 - 【請求項3】 前記第2の金属膜を銅により形成するこ
とを特徴とする請求項1または2記載の半導体装置の製
造方法。 - 【請求項4】 前記第2の金属膜をニッケルにより形成
することを特徴とする請求項1または2記載の半導体装
置の製造方法。 - 【請求項5】 前記表面めっき被膜を、ニッケルめっき
被膜および金めっき被膜で形成することを特徴とする請
求項3記載の半導体装置の製造方法。 - 【請求項6】 前記表面めっき被膜を、金めっき被膜で
形成することを特徴とする請求項4記載の半導体装置の
製造方法。 - 【請求項7】 前記第1および第2の金属膜をスパッタ
リングにより形成することを特徴とする請求項1、2、
3、4、5または6記載の半導体装置の製造方法。 - 【請求項8】 前記保護膜をポリイミド樹脂で形成する
ことを特徴とする請求項1、2、3、4、5、6または
7記載の半導体装置の製造方法。
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JP10326396A JP2000150518A (ja) | 1998-11-17 | 1998-11-17 | 半導体装置の製造方法 |
TW088119577A TW423122B (en) | 1998-11-17 | 1999-11-09 | Process for manufacturing semiconductor device |
EP99308974A EP1003209A1 (en) | 1998-11-17 | 1999-11-11 | Process for manufacturing semiconductor device |
KR1019990050127A KR20000047626A (ko) | 1998-11-17 | 1999-11-12 | 반도체 장치의 제조 방법 |
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TW (1) | TW423122B (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008205239A (ja) * | 2007-02-21 | 2008-09-04 | Fujitsu Ltd | 半導体装置及びその製造方法 |
US8067310B2 (en) | 2008-12-26 | 2011-11-29 | Kabushiki Kaisha Toshiba | Semiconductor device and method for manufacturing of same |
US8841210B1 (en) | 2013-03-22 | 2014-09-23 | Kabushiki Kaisha Toshiba | Semiconductor device manufacturing method and semiconductor device |
US9735090B2 (en) | 2014-10-06 | 2017-08-15 | Samsung Electronics Co., Ltd. | Integrated circuit devices having through-silicon vias and methods of manufacturing such devices |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3502800B2 (ja) * | 1999-12-15 | 2004-03-02 | 新光電気工業株式会社 | 半導体装置の製造方法 |
WO2001063991A1 (fr) | 2000-02-25 | 2001-08-30 | Ibiden Co., Ltd. | Carte a circuits imprimes multicouche et procede de production d'une carte a circuits imprimes multicouche |
EP1321980A4 (en) | 2000-09-25 | 2007-04-04 | Ibiden Co Ltd | SEMICONDUCTOR ELEMENT, METHOD FOR MANUFACTURING SEMICONDUCTOR ELEMENT, MULTILAYER PRINTED CIRCUIT BOARD, AND METHOD FOR MANUFACTURING MULTILAYER PRINTED CIRCUIT BOARD |
DE10158809B4 (de) * | 2001-11-30 | 2006-08-31 | Infineon Technologies Ag | Herstellungsverfahren für eine Leiterbahn auf einem Substrat und eine entsprechende Leiterbahn |
DE10360206B4 (de) * | 2003-12-13 | 2008-05-29 | Infineon Technologies Ag | Verfahren zum selektiven galvanischen Abscheiden in einer integrierten Schaltungsanordnung, insbesondere auf Kupfer, und integrierte Schaltungsanordnung |
JP5355504B2 (ja) * | 2009-07-30 | 2013-11-27 | 株式会社東芝 | 半導体装置の製造方法および半導体装置 |
Family Cites Families (5)
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DE3343362A1 (de) * | 1983-11-30 | 1985-06-05 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zur galvanischen herstellung metallischer, hoeckerartiger anschlusskontakte |
JPS62188343A (ja) * | 1986-02-14 | 1987-08-17 | Nec Corp | 半導体装置の製造方法 |
JPH0194641A (ja) * | 1987-10-05 | 1989-04-13 | Nec Corp | 半導体装置 |
US5151168A (en) * | 1990-09-24 | 1992-09-29 | Micron Technology, Inc. | Process for metallizing integrated circuits with electrolytically-deposited copper |
JPH04278543A (ja) * | 1991-03-07 | 1992-10-05 | Nec Corp | 半導体装置及びその製造方法 |
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1998
- 1998-11-17 JP JP10326396A patent/JP2000150518A/ja active Pending
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1999
- 1999-11-09 TW TW088119577A patent/TW423122B/zh not_active IP Right Cessation
- 1999-11-11 EP EP99308974A patent/EP1003209A1/en not_active Withdrawn
- 1999-11-12 KR KR1019990050127A patent/KR20000047626A/ko not_active Application Discontinuation
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008205239A (ja) * | 2007-02-21 | 2008-09-04 | Fujitsu Ltd | 半導体装置及びその製造方法 |
US8067310B2 (en) | 2008-12-26 | 2011-11-29 | Kabushiki Kaisha Toshiba | Semiconductor device and method for manufacturing of same |
US8415247B2 (en) | 2008-12-26 | 2013-04-09 | Kabushiki Kaisha Toshiba | Semiconductor device and method for manufacturing of same |
US8810032B2 (en) | 2008-12-26 | 2014-08-19 | Kabushiki Kaisha Toshiba | Semiconductor device and method for manufacturing of same |
US8841210B1 (en) | 2013-03-22 | 2014-09-23 | Kabushiki Kaisha Toshiba | Semiconductor device manufacturing method and semiconductor device |
US9735090B2 (en) | 2014-10-06 | 2017-08-15 | Samsung Electronics Co., Ltd. | Integrated circuit devices having through-silicon vias and methods of manufacturing such devices |
Also Published As
Publication number | Publication date |
---|---|
KR20000047626A (ko) | 2000-07-25 |
TW423122B (en) | 2001-02-21 |
EP1003209A1 (en) | 2000-05-24 |
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